/* GNUPLOT - command.c */
/*[
* Copyright 1986 - 1993, 1998, 2004 Thomas Williams, Colin Kelley
*
* Permission to use, copy, and distribute this software and its
* documentation for any purpose with or without fee is hereby granted,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation.
*
* Permission to modify the software is granted, but not the right to
* distribute the complete modified source code. Modifications are to
* be distributed as patches to the released version. Permission to
* distribute binaries produced by compiling modified sources is granted,
* provided you
* 1. distribute the corresponding source modifications from the
* released version in the form of a patch file along with the binaries,
* 2. add special version identification to distinguish your version
* in addition to the base release version number,
* 3. provide your name and address as the primary contact for the
* support of your modified version, and
* 4. retain our contact information in regard to use of the base
* software.
* Permission to distribute the released version of the source code along
* with corresponding source modifications in the form of a patch file is
* granted with same provisions 2 through 4 for binary distributions.
*
* This software is provided "as is" without express or implied warranty
* to the extent permitted by applicable law.
]*/
/*
* Changes:
*
* Feb 5, 1992 Jack Veenstra (veenstra@cs.rochester.edu) Added support to
* filter data values read from a file through a user-defined function before
* plotting. The keyword "thru" was added to the "plot" command. Example
* syntax: f(x) = x / 100 plot "test.data" thru f(x) This example divides all
* the y values by 100 before plotting. The filter function processes the
* data before any log-scaling occurs. This capability should be generalized
* to filter x values as well and a similar feature should be added to the
* "splot" command.
*
* 19 September 1992 Lawrence Crowl (crowl@cs.orst.edu)
* Added user-specified bases for log scaling.
*
* April 1999 Franz Bakan (bakan@ukezyk.desy.de)
* Added code to support mouse-input from OS/2 PM window
* Changes marked by USE_MOUSE
*
* May 1999, update by Petr Mikulik
* Use gnuplot's pid in shared mem name
*
* August 1999 Franz Bakan and Petr Mikulik
* Encapsulating read_line into a thread, acting on input when thread or
* gnupmdrv posts an event semaphore. Thus mousing works even when gnuplot
* is used as a plotting device (commands passed via pipe).
*
* May 2011 Ethan A Merritt
* Introduce block structure defined by { ... }, which may span multiple lines.
* In order to have the entire block available at one time we now count
* +/- curly brackets during input and keep extending the current input line
* until the net count is zero. This is done in do_line() for interactive
* input, and load_file() for non-interactive input.
*/
#include "command.h"
#include "axis.h"
#include "alloc.h"
#include "datablock.h"
#include "eval.h"
#include "fit.h"
#include "datafile.h"
#include "getcolor.h"
#include "gp_hist.h"
#include "gp_time.h"
#include "misc.h"
#include "parse.h"
#include "plot.h"
#include "plot2d.h"
#include "plot3d.h"
#include "readline.h"
#include "save.h"
#include "scanner.h"
#include "setshow.h"
#include "stats.h"
#include "tables.h"
#include "term_api.h"
#include "util.h"
#include "variable.h"
#include "external.h"
#ifdef USE_MOUSE
# include "mouse.h"
int paused_for_mouse = 0;
#endif
#define PROMPT "gnuplot> "
#ifdef OS2_IPC
# define INCL_DOSMEMMGR
# define INCL_DOSPROCESS
# define INCL_DOSSEMAPHORES
# include <os2.h>
PVOID input_from_PM_Terminal = NULL;
char mouseSharedMemName[40] = "";
HEV semInputReady = 0; /* semaphore to be created in plot.c */
int thread_rl_Running = 0; /* running status */
int thread_rl_RetCode = -1; /* return code from readline in a thread */
#endif /* OS2_IPC */
#ifndef _Windows
# include "help.h"
#endif /* _Windows */
#ifdef _Windows
# include <windows.h>
# ifdef __MSC__
# include <malloc.h>
# include <direct.h> /* getcwd() */
# else
# include <alloc.h>
# endif /* !MSC */
# include <htmlhelp.h>
# include "win/winmain.h"
#endif /* _Windows */
#ifdef VMS
int vms_vkid; /* Virtual keyboard id */
int vms_ktid; /* key table id, for translating keystrokes */
#endif /* VMS */
/* static prototypes */
static void command __PROTO((void));
static TBOOLEAN is_array_assignment __PROTO((void));
static int changedir __PROTO((char *path));
static char* fgets_ipc __PROTO((char* dest, int len));
static char* gp_get_string __PROTO((char *, size_t, const char *));
static int read_line __PROTO((const char *prompt, int start));
static void do_system __PROTO((const char *));
static void test_palette_subcommand __PROTO((void));
static int find_clause __PROTO((int *, int *));
static int report_error __PROTO((int ierr));
static int expand_1level_macros __PROTO((void));
struct lexical_unit *token;
int token_table_size;
char *gp_input_line;
size_t gp_input_line_len;
int inline_num; /* input line number */
struct udft_entry *dummy_func;
/* support for replot command */
char *replot_line;
int plot_token; /* start of 'plot' command */
/* flag to disable `replot` when some data are sent through stdin;
* used by mouse/hotkey capable terminals */
TBOOLEAN replot_disabled = FALSE;
/* output file for the print command */
FILE *print_out = NULL;
struct udvt_entry *print_out_var = NULL;
char *print_out_name = NULL;
/* input data, parsing variables */
int num_tokens, c_token;
int if_depth = 0;
TBOOLEAN if_condition = FALSE;
TBOOLEAN if_open_for_else = FALSE;
static int clause_depth = 0;
/* support for 'break' and 'continue' commands */
static int iteration_depth = 0;
static TBOOLEAN requested_break = FALSE;
static TBOOLEAN requested_continue = FALSE;
static int command_exit_status = 0;
/* support for dynamic size of input line */
void
extend_input_line()
{
if (gp_input_line_len == 0) {
/* first time */
gp_input_line = gp_alloc(MAX_LINE_LEN, "gp_input_line");
gp_input_line_len = MAX_LINE_LEN;
gp_input_line[0] = NUL;
#ifdef OS2_IPC
sprintf( mouseSharedMemName, "\\SHAREMEM\\GP%i_Mouse_Input", getpid() );
if (DosAllocSharedMem((PVOID) & input_from_PM_Terminal,
mouseSharedMemName, MAX_LINE_LEN, PAG_WRITE | PAG_COMMIT))
fputs("command.c: DosAllocSharedMem ERROR\n",stderr);
#endif /* OS2_IPC */
} else {
gp_input_line = gp_realloc(gp_input_line, gp_input_line_len + MAX_LINE_LEN,
"extend input line");
gp_input_line_len += MAX_LINE_LEN;
FPRINTF((stderr, "extending input line to %d chars\n",
gp_input_line_len));
}
}
/* constant by which token table grows */
#define MAX_TOKENS 400
void
extend_token_table()
{
if (token_table_size == 0) {
/* first time */
token = (struct lexical_unit *) gp_alloc(MAX_TOKENS * sizeof(struct lexical_unit), "token table");
token_table_size = MAX_TOKENS;
/* HBB: for checker-runs: */
memset(token, 0, MAX_TOKENS * sizeof(*token));
} else {
token = gp_realloc(token, (token_table_size + MAX_TOKENS) * sizeof(struct lexical_unit), "extend token table");
memset(token+token_table_size, 0, MAX_TOKENS * sizeof(*token));
token_table_size += MAX_TOKENS;
FPRINTF((stderr, "extending token table to %d elements\n", token_table_size));
}
}
#ifdef OS2_IPC
void thread_read_line()
{
thread_rl_Running = 1;
thread_rl_RetCode = ( read_line(PROMPT, 0) );
thread_rl_Running = 0;
DosPostEventSem(semInputReady);
}
#endif /* OS2_IPC */
int
com_line()
{
#ifdef OS2_IPC
static char *input_line_SharedMem = NULL;
if (input_line_SharedMem == NULL) { /* get shared mem only once */
if (DosGetNamedSharedMem((PVOID) &input_line_SharedMem,
mouseSharedMemName, PAG_WRITE | PAG_READ))
fputs("readline.c: DosGetNamedSharedMem ERROR\n", stderr);
else
*input_line_SharedMem = 0;
}
#endif /* OS2_IPC */
if (multiplot) {
/* calls int_error() if it is not happy */
term_check_multiplot_okay(interactive);
if (read_line("multiplot> ", 0))
return (1);
} else {
#if defined(OS2_IPC) && defined(USE_MOUSE)
ULONG u;
if (thread_rl_Running == 0) {
int res = _beginthread(thread_read_line,NULL,32768,NULL);
if (res == -1)
fputs("error command.c could not begin thread\n",stderr);
}
/* wait until a line is read or gnupmdrv makes shared mem available */
DosWaitEventSem(semInputReady,SEM_INDEFINITE_WAIT);
DosResetEventSem(semInputReady,&u);
if (thread_rl_Running) {
if (input_line_SharedMem == NULL || !*input_line_SharedMem)
return (0);
if (*input_line_SharedMem=='%') {
do_event( (struct gp_event_t*)(input_line_SharedMem+1) ); /* pass terminal's event */
input_line_SharedMem[0] = 0; /* discard the whole command line */
thread_rl_RetCode = 0;
return (0);
}
if (*input_line_SharedMem &&
strstr(input_line_SharedMem,"plot") != NULL &&
(strcmp(term->name,"pm") && strcmp(term->name,"x11"))) {
/* avoid plotting if terminal is not PM or X11 */
fprintf(stderr,"\n\tCommand(s) ignored for other than PM and X11 terminals\a\n");
if (interactive) fputs(PROMPT,stderr);
input_line_SharedMem[0] = 0; /* discard the whole command line */
return (0);
}
strcpy(gp_input_line, input_line_SharedMem);
input_line_SharedMem[0] = 0;
thread_rl_RetCode = 0;
}
if (thread_rl_RetCode)
return (1);
#else /* The normal case */
if (read_line(PROMPT, 0))
return (1);
#endif /* defined(OS2_IPC) && defined(USE_MOUSE) */
}
/* So we can flag any new output: if false at time of error,
* we reprint the command line before printing caret.
* TRUE for interactive terminals, since the command line is typed.
* FALSE for non-terminal stdin, so command line is printed anyway.
* (DFK 11/89)
*/
screen_ok = interactive;
if (do_line())
return (1);
else
return (0);
}
int
do_line()
{
/* Line continuation has already been handled by read_line() */
char *inlptr;
/* Expand any string variables in the current input line */
string_expand_macros();
/* Skip leading whitespace */
inlptr = gp_input_line;
while (isspace((unsigned char) *inlptr))
inlptr++;
/* Leading '!' indicates a shell command that bypasses normal gnuplot
* tokenization and parsing. This doesn't work inside a bracketed clause.
*/
if (is_system(*inlptr)) {
do_system(inlptr + 1);
return (0);
}
/* Strip off trailing comment */
FPRINTF((stderr,"doline( \"%s\" )\n", gp_input_line));
if (strchr(inlptr, '#')) {
num_tokens = scanner(&gp_input_line, &gp_input_line_len);
if (gp_input_line[token[num_tokens].start_index] == '#')
gp_input_line[token[num_tokens].start_index] = NUL;
}
if (inlptr != gp_input_line) {
/* If there was leading whitespace, copy the actual
* command string to the front. use memmove() because
* source and target may overlap */
memmove(gp_input_line, inlptr, strlen(inlptr));
/* Terminate resulting string */
gp_input_line[strlen(inlptr)] = NUL;
}
FPRINTF((stderr, " echo: \"%s\"\n", gp_input_line));
if_depth = 0;
num_tokens = scanner(&gp_input_line, &gp_input_line_len);
/*
* Expand line if necessary to contain a complete bracketed clause {...}
* Insert a ';' after current line and append the next input line.
* NB: This may leave an "else" condition on the next line.
*/
if (curly_brace_count < 0)
int_error(NO_CARET,"Unexpected }");
while (curly_brace_count > 0) {
if (lf_head && lf_head->depth > 0) {
/* This catches the case that we are inside a "load foo" operation
* and therefore requesting interactive input is not an option.
* FIXME: or is it?
*/
int_error(NO_CARET, "Syntax error: missing block terminator }");
}
else if (interactive || noinputfiles) {
/* If we are really in interactive mode and there are unterminated blocks,
* then we want to display a "more>" prompt to get the rest of the block.
* However, there are two more cases that must be dealt here:
* One is when commands are piped to gnuplot - on the command line,
* the other is when commands are piped to gnuplot which is opened
* as a slave process. The test for noinputfiles is for the latter case.
* If we didn't have that test here, unterminated blocks sent via a pipe
* would trigger the error message in the else branch below. */
int retval;
strcat(gp_input_line,";");
retval = read_line("more> ", strlen(gp_input_line));
if (retval)
int_error(NO_CARET, "Syntax error: missing block terminator }");
/* Expand any string variables in the current input line */
string_expand_macros();
num_tokens = scanner(&gp_input_line, &gp_input_line_len);
if (gp_input_line[token[num_tokens].start_index] == '#')
gp_input_line[token[num_tokens].start_index] = NUL;
}
else {
/* Non-interactive mode here means that we got a string from -e.
* Having curly_brace_count > 0 means that there are at least one
* unterminated blocks in the string.
* Likely user error, so we die with an error message. */
int_error(NO_CARET, "Syntax error: missing block terminator }");
}
}
c_token = 0;
while (c_token < num_tokens) {
command();
if (iteration_early_exit()) {
c_token = num_tokens;
break;
}
if (command_exit_status) {
command_exit_status = 0;
return 1;
}
if (c_token < num_tokens) { /* something after command */
if (equals(c_token, ";")) {
c_token++;
} else if (equals(c_token, "{")) {
begin_clause();
} else if (equals(c_token, "}")) {
end_clause();
} else
int_error(c_token, "unexpected or unrecognized token");
}
}
/* This check allows event handling inside load/eval/while statements */
check_for_mouse_events();
return (0);
}
void
do_string(const char *s)
{
char *cmdline = gp_strdup(s);
do_string_and_free(cmdline);
}
void
do_string_and_free(char *cmdline)
{
#ifdef USE_MOUSE
if (display_ipc_commands())
fprintf(stderr, "%s\n", cmdline);
#endif
lf_push(NULL, NULL, cmdline); /* save state for errors and recursion */
while (gp_input_line_len < strlen(cmdline) + 1)
extend_input_line();
strcpy(gp_input_line, cmdline);
screen_ok = FALSE;
command_exit_status = do_line();
/* We don't know if screen_ok is appropriate so leave it FALSE. */
lf_pop();
}
#ifdef USE_MOUSE
void
toggle_display_of_ipc_commands()
{
if (mouse_setting.verbose)
mouse_setting.verbose = 0;
else
mouse_setting.verbose = 1;
}
int
display_ipc_commands()
{
return mouse_setting.verbose;
}
void
do_string_replot(const char *s)
{
do_string(s);
if (volatile_data && (E_REFRESH_NOT_OK != refresh_ok)) {
if (display_ipc_commands())
fprintf(stderr, "refresh\n");
refresh_request();
} else if (!replot_disabled)
replotrequest();
else
int_warn(NO_CARET, "refresh not possible and replot is disabled");
}
void
restore_prompt()
{
if (interactive) {
#if defined(HAVE_LIBREADLINE) || defined(HAVE_LIBEDITLINE)
# if !defined(MISSING_RL_FORCED_UPDATE_DISPLAY)
rl_forced_update_display();
# else
rl_redisplay();
# endif
#else
fputs(PROMPT, stderr);
fflush(stderr);
#endif
}
}
#endif /* USE_MOUSE */
void
define()
{
int start_token; /* the 1st token in the function definition */
struct udvt_entry *udv;
struct udft_entry *udf;
struct value result;
if (equals(c_token + 1, "(")) {
/* function ! */
int dummy_num = 0;
struct at_type *at_tmp;
char *tmpnam;
char save_dummy[MAX_NUM_VAR][MAX_ID_LEN+1];
memcpy(save_dummy, c_dummy_var, sizeof(save_dummy));
start_token = c_token;
do {
c_token += 2; /* skip to the next dummy */
copy_str(c_dummy_var[dummy_num++], c_token, MAX_ID_LEN);
} while (equals(c_token + 1, ",") && (dummy_num < MAX_NUM_VAR));
if (equals(c_token + 1, ","))
int_error(c_token + 2, "function contains too many parameters");
c_token += 3; /* skip (, dummy, ) and = */
if (END_OF_COMMAND)
int_error(c_token, "function definition expected");
udf = dummy_func = add_udf(start_token);
udf->dummy_num = dummy_num;
if ((at_tmp = perm_at()) == (struct at_type *) NULL)
int_error(start_token, "not enough memory for function");
if (udf->at) /* already a dynamic a.t. there */
free_at(udf->at); /* so free it first */
udf->at = at_tmp; /* before re-assigning it. */
memcpy(c_dummy_var, save_dummy, sizeof(save_dummy));
m_capture(&(udf->definition), start_token, c_token - 1);
dummy_func = NULL; /* dont let anyone else use our workspace */
/* Save function definition in a user-accessible variable */
tmpnam = gp_alloc(8+strlen(udf->udf_name), "varname");
strcpy(tmpnam, "GPFUN_");
strcat(tmpnam, udf->udf_name);
fill_gpval_string(tmpnam, udf->definition);
free(tmpnam);
} else {
/* variable ! */
char *varname = gp_input_line + token[c_token].start_index;
if (!strncmp(varname, "GPVAL_", 6) || !strncmp(varname, "MOUSE_", 6))
int_error(c_token, "Cannot set internal variables GPVAL_ and MOUSE_");
start_token = c_token;
c_token += 2;
udv = add_udv(start_token);
(void) const_express(&result);
/* Prevents memory leak if the variable name is re-used */
gpfree_array(&udv->udv_value);
gpfree_string(&udv->udv_value);
udv->udv_value = result;
}
}
void
undefine_command()
{
char key[MAX_ID_LEN+1];
TBOOLEAN wildcard;
c_token++; /* consume the command name */
while (!END_OF_COMMAND) {
/* copy next var name into key */
copy_str(key, c_token, MAX_ID_LEN);
/* Peek ahead - must do this, because a '*' is returned as a
separate token, not as part of the 'key' */
wildcard = equals(c_token+1,"*");
if (wildcard)
c_token++;
/* The '$' starting a data block name is a separate token */
else if (*key == '$')
copy_str(&key[1], ++c_token, MAX_ID_LEN-1);
/* ignore internal variables */
if (strncmp(key, "GPVAL_", 6) && strncmp(key, "MOUSE_", 6))
del_udv_by_name( key, wildcard );
c_token++;
}
}
static void
command()
{
int i;
for (i = 0; i < MAX_NUM_VAR; i++)
c_dummy_var[i][0] = NUL; /* no dummy variables */
if (is_definition(c_token))
define();
else if (is_array_assignment())
;
else
(*lookup_ftable(&command_ftbl[0],c_token))();
return;
}
/* process the 'raise' or 'lower' command */
void
raise_lower_command(int lower)
{
++c_token;
if (END_OF_COMMAND) {
if (lower) {
#ifdef OS2
pm_lower_terminal_window();
#endif
#ifdef X11
x11_lower_terminal_group();
#endif
#ifdef _Windows
win_lower_terminal_group();
#endif
#ifdef WXWIDGETS
wxt_lower_terminal_group();
#endif
} else {
#ifdef OS2
pm_raise_terminal_window();
#endif
#ifdef X11
x11_raise_terminal_group();
#endif
#ifdef _Windows
win_raise_terminal_group();
#endif
#ifdef WXWIDGETS
wxt_raise_terminal_group();
#endif
}
return;
} else {
int number;
int negative = equals(c_token, "-");
if (negative || equals(c_token, "+")) c_token++;
if (!END_OF_COMMAND && isanumber(c_token)) {
number = real_expression();
if (negative)
number = -number;
if (lower) {
#ifdef OS2
pm_lower_terminal_window();
#endif
#ifdef X11
x11_lower_terminal_window(number);
#endif
#ifdef _Windows
win_lower_terminal_window(number);
#endif
#ifdef WXWIDGETS
wxt_lower_terminal_window(number);
#endif
} else {
#ifdef OS2
pm_raise_terminal_window();
#endif
#ifdef X11
x11_raise_terminal_window(number);
#endif
#ifdef _Windows
win_raise_terminal_window(number);
#endif
#ifdef WXWIDGETS
wxt_raise_terminal_window(number);
#endif
}
++c_token;
return;
}
}
if (lower)
int_error(c_token, "usage: lower {plot_id}");
else
int_error(c_token, "usage: raise {plot_id}");
}
void
raise_command(void)
{
raise_lower_command(0);
}
void
lower_command(void)
{
raise_lower_command(1);
}
/*
* Arrays are declared using the syntax
* array A[size]
* where size is an integer and space is reserved for elements A[1] through A[size]
* The size itself is stored in A[0].v.int_val.
*
* Elements in an existing array can be accessed like any other gnuplot variable.
* Each element can be one of INTGR, CMPLX, STRING.
* When the array is declared all elements are set to NOTDEFINED.
*/
void
array_command()
{
int nsize = 0;
struct udvt_entry *array;
struct value *A;
int i;
/* Create or recycle a udv containing an array with the requested name */
if (!isletter(++c_token))
int_error(c_token, "illegal variable name");
array = add_udv(c_token);
gpfree_array(&array->udv_value);
gpfree_string(&array->udv_value);
if (!equals(++c_token,"["))
int_error(c_token, "expecting array[size]");
c_token++;
nsize = int_expression();
if (!equals(c_token++,"]") || nsize <= 0)
int_error(c_token-1, "expecting array[size>0]");
array->udv_value.v.value_array = gp_alloc((nsize+1) * sizeof(t_value), "array_command");
array->udv_value.type = ARRAY;
/* Element zero of the new array is not visible but contains the size */
A = array->udv_value.v.value_array;
A[0].v.int_val = nsize;
for (i = 0; i <= nsize; i++) {
A[i].type = NOTDEFINED;
}
/* Initializer syntax: array A[10] = [x,y,z,,"foo",] */
if (equals(c_token, "=")) {
if (!equals(++c_token, "["))
int_error(c_token, "expecting Array[size] = [x,y,...]");
c_token++;
for (i = 1; i <= nsize; i++) {
if (equals(c_token, "]"))
break;
if (equals(c_token, ",")) {
c_token++;
continue;
}
const_express(&A[i]);
if (equals(c_token, "]"))
break;
if (equals(c_token, ","))
c_token++;
else
int_error(c_token, "expecting Array[size] = [x,y,...]");
}
c_token++;
}
return;
}
/*
* Check for command line beginning with
* Array[<expr>] = <expr>
* This routine is modeled on command.c:define()
*/
TBOOLEAN
is_array_assignment()
{
udvt_entry *udv;
struct value newvalue;
int index;
TBOOLEAN looks_OK = FALSE;
int brackets;
if (!isletter(c_token) || !equals(c_token+1, "["))
return FALSE;
/* There are other legal commands where the 2nd token is [
* e.g. "plot [min:max] foo"
* so we check that the closing ] is immediately followed by =.
*/
for (index=c_token+2, brackets=1; index < num_tokens; index++) {
if (equals(index,";"))
return FALSE;
if (equals(index,"["))
brackets++;
if (equals(index,"]"))
brackets--;
if (brackets == 0) {
if (!equals(index+1,"="))
return FALSE;
looks_OK = TRUE;
break;
}
}
if (!looks_OK)
return FALSE;
udv = add_udv(c_token);
if (udv->udv_value.type != ARRAY)
int_error(c_token, "Not a known array");
/* Evaluate index */
c_token += 2;
index = int_expression();
if (index <= 0 || index > udv->udv_value.v.value_array[0].v.int_val)
int_error(c_token, "array index out of range");
if (!equals(c_token, "]") || !equals(c_token+1, "="))
int_error(c_token, "Expecting Arrayname[<expr>] = <expr>");
/* Evaluate right side of assignment */
c_token += 2;
(void) const_express(&newvalue);
udv->udv_value.v.value_array[index] = newvalue;
return TRUE;
}
#ifdef USE_MOUSE
/* process the 'bind' command */
/* EAM - rewritten 2015 */
void
bind_command()
{
char* lhs = NULL;
char* rhs = NULL;
TBOOLEAN allwindows = FALSE;
++c_token;
if (almost_equals(c_token,"all$windows")) {
allwindows = TRUE;
c_token++;
}
/* get left hand side: the key or key sequence
* either (1) entire sequence is in quotes
* or (2) sequence goes until the first whitespace
*/
if (END_OF_COMMAND) {
; /* Fall through */
} else if (isstringvalue(c_token) && (lhs = try_to_get_string())) {
FPRINTF((stderr,"Got bind quoted lhs = \"%s\"\n",lhs));
} else {
char *first = gp_input_line + token[c_token].start_index;
int size = strcspn(first, " \";");
lhs = gp_alloc(size + 1, "bind_command->lhs");
strncpy(lhs, first, size);
lhs[size] = '\0';
FPRINTF((stderr,"Got bind unquoted lhs = \"%s\"\n",lhs));
while (gp_input_line + token[c_token].start_index < first+size)
c_token++;
}
/* get right hand side: the command to bind
* either (1) quoted command
* or (2) the rest of the line
*/
if (END_OF_COMMAND) {
; /* Fall through */
} else if (isstringvalue(c_token) && (rhs = try_to_get_string())) {
FPRINTF((stderr,"Got bind quoted rhs = \"%s\"\n",rhs));
} else {
int save_token = c_token;
while (!END_OF_COMMAND)
c_token++;
m_capture( &rhs, save_token, c_token-1 );
FPRINTF((stderr,"Got bind unquoted rhs = \"%s\"\n",rhs));
}
/* bind_process() will eventually free lhs / rhs ! */
bind_process(lhs, rhs, allwindows);
}
#endif /* USE_MOUSE */
/*
* 'break' and 'continue' commands act as in the C language.
* Skip to the end of current loop iteration and (for break)
* do not iterate further
*/
void
break_command()
{
c_token++;
if (iteration_depth == 0)
return;
/* Skip to end of current iteration */
c_token = num_tokens;
/* request that subsequent iterations should be skipped also */
requested_break = TRUE;
}
void
continue_command()
{
c_token++;
if (iteration_depth == 0)
return;
/* Skip to end of current clause */
c_token = num_tokens;
/* request that remainder of this iteration be skipped also */
requested_continue = TRUE;
}
TBOOLEAN
iteration_early_exit()
{
return (requested_continue || requested_break);
}
/*
* Command parser functions
*/
/* process the 'call' command */
void
call_command()
{
char *save_file = NULL;
c_token++;
save_file = try_to_get_string();
if (!save_file)
int_error(c_token, "expecting filename");
gp_expand_tilde(&save_file);
/* Argument list follows filename */
load_file(loadpath_fopen(save_file, "r"), save_file, 2);
}
/* process the 'cd' command */
void
changedir_command()
{
char *save_file = NULL;
c_token++;
save_file = try_to_get_string();
if (!save_file)
int_error(c_token, "expecting directory name");
gp_expand_tilde(&save_file);
if (changedir(save_file))
int_error(c_token, "Can't change to this directory");
else
update_gpval_variables(5);
free(save_file);
}
/* process the 'clear' command */
void
clear_command()
{
term_start_plot();
if (multiplot && term->fillbox) {
unsigned int xx1 = (unsigned int) (xoffset * term->xmax);
unsigned int yy1 = (unsigned int) (yoffset * term->ymax);
unsigned int width = (unsigned int) (xsize * term->xmax);
unsigned int height = (unsigned int) (ysize * term->ymax);
(*term->fillbox) (0, xx1, yy1, width, height);
}
term_end_plot();
screen_ok = FALSE;
c_token++;
}
/* process the 'evaluate' command */
void
eval_command()
{
char *command;
c_token++;
command = try_to_get_string();
if (!command)
int_error(c_token, "Expected command string");
do_string_and_free(command);
}
/* process the 'exit' and 'quit' commands */
void
exit_command()
{
/* If the command is "exit gnuplot" then do so */
if (equals(c_token+1,"gnuplot"))
gp_exit(EXIT_SUCCESS);
/* exit error 'error message' returns to the top command line */
if (equals(c_token+1,"error")) {
c_token += 2;
int_error(NO_CARET, try_to_get_string());
}
/* else graphics will be tidied up in main */
command_exit_status = 1;
}
/* fit_command() is in fit.c */
/* help_command() is below */
/* process the 'history' command */
void
history_command()
{
#ifdef USE_READLINE
c_token++;
if (!END_OF_COMMAND && equals(c_token,"?")) {
static char *search_str = NULL; /* string from command line to search for */
/* find and show the entries */
c_token++;
m_capture(&search_str, c_token, c_token); /* reallocates memory */
printf ("history ?%s\n", search_str);
if (!history_find_all(search_str))
int_error(c_token,"not in history");
c_token++;
} else if (!END_OF_COMMAND && equals(c_token,"!")) {
const char *line_to_do = NULL; /* command returned by search */
c_token++;
if (isanumber(c_token)) {
int i = int_expression();
line_to_do = history_find_by_number(i);
} else {
char *search_str = NULL; /* string from command line to search for */
m_capture(&search_str, c_token, c_token);
line_to_do = history_find(search_str);
free(search_str);
}
if (line_to_do == NULL)
int_error(c_token, "not in history");
/* Add the command to the history.
Note that history commands themselves are no longer added to the history. */
add_history((char *) line_to_do);
printf(" Executing:\n\t%s\n", line_to_do);
do_string(line_to_do);
c_token++;
} else {
int n = 0; /* print only <last> entries */
char *tmp;
TBOOLEAN append = FALSE; /* rewrite output file or append it */
static char *name = NULL; /* name of the output file; NULL for stdout */
TBOOLEAN quiet = history_quiet;
if (!END_OF_COMMAND && almost_equals(c_token,"q$uiet")) {
/* option quiet to suppress history entry numbers */
quiet = TRUE;
c_token++;
}
/* show history entries */
if (!END_OF_COMMAND && isanumber(c_token)) {
n = int_expression();
}
if ((tmp = try_to_get_string())) {
free(name);
name = tmp;
if (!END_OF_COMMAND && almost_equals(c_token, "ap$pend")) {
append = TRUE;
c_token++;
}
}
write_history_n(n, (quiet ? "" : name), (append ? "a" : "w"));
}
#else
c_token++;
int_warn(NO_CARET, "This copy of gnuplot was built without support for command history.");
#endif /* defined(USE_READLINE) */
}
#define REPLACE_ELSE(tok) \
do { \
int idx = token[tok].start_index; \
token[tok].length = 1; \
gp_input_line[idx++] = ';'; /* e */ \
gp_input_line[idx++] = ' '; /* l */ \
gp_input_line[idx++] = ' '; /* s */ \
gp_input_line[idx++] = ' '; /* e */ \
} while (0)
#if 0
#define PRINT_TOKEN(tok) \
do { \
int i; \
int end_index = token[tok].start_index + token[tok].length; \
for (i = token[tok].start_index; i < end_index && gp_input_line[i]; i++) { \
fputc(gp_input_line[i], stderr); \
} \
fputc('\n', stderr); \
fflush(stderr); \
} while (0)
#endif
/* Make a copy of an input line substring delimited by { and } */
static char *
new_clause(int clause_start, int clause_end)
{
char *clause = gp_alloc(clause_end - clause_start, "clause");
memcpy(clause, &gp_input_line[clause_start+1], clause_end - clause_start);
clause[clause_end - clause_start - 1] = '\0';
return clause;
}
/* process the 'if' command */
void
if_command()
{
double exprval;
int end_token;
if (!equals(++c_token, "(")) /* no expression */
int_error(c_token, "expecting (expression)");
exprval = real_expression();
/*
* EAM May 2011
* New if {...} else {...} syntax can span multiple lines.
* Isolate the active clause and execute it recursively.
*/
if (equals(c_token,"{")) {
/* Identify start and end position of the clause substring */
char *clause = NULL;
int if_start, if_end, else_start=0, else_end=0;
int clause_start, clause_end;
c_token = find_clause(&if_start, &if_end);
if (equals(c_token,"else")) {
if (!equals(++c_token,"{"))
int_error(c_token,"expected {else-clause}");
c_token = find_clause(&else_start, &else_end);
}
end_token = c_token;
if (exprval != 0) {
clause_start = if_start;
clause_end = if_end;
if_condition = TRUE;
} else {
clause_start = else_start;
clause_end = else_end;
if_condition = FALSE;
}
if_open_for_else = (else_start) ? FALSE : TRUE;
if (if_condition || else_start != 0) {
clause = new_clause(clause_start, clause_end);
begin_clause();
do_string_and_free(clause);
end_clause();
}
if (iteration_early_exit())
c_token = num_tokens;
else
c_token = end_token;
return;
}
/*
* EAM May 2011
* Old if/else syntax (no curly braces) affects the rest of the current line.
* Deprecate?
*/
if (clause_depth > 0)
int_error(c_token,"Old-style if/else statement encountered inside brackets");
if_depth++;
if (exprval != 0.0) {
/* fake the condition of a ';' between commands */
int eolpos = token[num_tokens - 1].start_index + token[num_tokens - 1].length;
--c_token;
token[c_token].length = 1;
token[c_token].start_index = eolpos + 2;
gp_input_line[eolpos + 2] = ';';
gp_input_line[eolpos + 3] = NUL;
if_condition = TRUE;
} else {
while (c_token < num_tokens) {
/* skip over until the next command */
while (!END_OF_COMMAND) {
++c_token;
}
if (equals(++c_token, "else")) {
/* break if an "else" was found */
if_condition = FALSE;
--c_token; /* go back to ';' */
return;
}
}
/* no else found */
c_token = num_tokens = 0;
}
}
/* process the 'else' command */
void
else_command()
{
int end_token;
/*
* EAM May 2011
* New if/else syntax permits else clause to appear on a new line
*/
if (equals(c_token+1,"{")) {
int clause_start, clause_end;
char *clause;
if (if_open_for_else)
if_open_for_else = FALSE;
else
int_error(c_token,"Invalid {else-clause}");
c_token++; /* Advance to the opening curly brace */
end_token = find_clause(&clause_start, &clause_end);
if (!if_condition) {
clause = new_clause(clause_start, clause_end);
begin_clause();
do_string_and_free(clause);
end_clause();
}
if (iteration_early_exit())
c_token = num_tokens;
else
c_token = end_token;
return;
}
/* EAM May 2011
* The rest is only relevant to the old if/else syntax (no curly braces)
*/
if (if_depth <= 0) {
int_error(c_token, "else without if");
return;
} else {
if_depth--;
}
if (TRUE == if_condition) {
/* First part of line was true so
* discard the rest of the line. */
c_token = num_tokens = 0;
} else {
REPLACE_ELSE(c_token);
if_condition = TRUE;
}
}
/* process commands of the form 'do for [i=1:N] ...' */
void
do_command()
{
t_iterator *do_iterator;
int do_start, do_end;
int end_token;
char *clause;
c_token++;
do_iterator = check_for_iteration();
if (!equals(c_token,"{")) {
cleanup_iteration(do_iterator);
int_error(c_token,"expecting {do-clause}");
}
end_token = find_clause(&do_start, &do_end);
clause = new_clause(do_start, do_end);
begin_clause();
iteration_depth++;
/* Sometimes the start point of a nested iteration is not within the
* limits for all levels of nesting. In this case we need to advance
* through the iteration to find the first good set of indices.
* If we don't find one, forget the whole thing.
*/
if (empty_iteration(do_iterator) && !next_iteration(do_iterator)) {
strcpy(clause, ";");
}
do {
requested_continue = FALSE;
do_string(clause);
if (requested_break)
break;
} while (next_iteration(do_iterator));
iteration_depth--;
free(clause);
end_clause();
c_token = end_token;
/* FIXME: If any of the above exited via int_error() then this */
/* cleanup never happens and we leak memory. But do_iterator can */
/* not be static or global because do_command() can recurse. */
do_iterator = cleanup_iteration(do_iterator);
requested_break = FALSE;
requested_continue = FALSE;
}
/* process commands of the form 'while (foo) {...}' */
/* FIXME: For consistency there should be an iterator associated
* with this statement.
*/
void
while_command()
{
int do_start, do_end;
char *clause;
int save_token, end_token;
double exprval;
c_token++;
save_token = c_token;
exprval = real_expression();
if (!equals(c_token,"{"))
int_error(c_token,"expecting {while-clause}");
end_token = find_clause(&do_start, &do_end);
clause = new_clause(do_start, do_end);
begin_clause();
iteration_depth++;
while (exprval != 0) {
requested_continue = FALSE;
do_string(clause);
if (requested_break)
break;
c_token = save_token;
exprval = real_expression();
};
iteration_depth--;
end_clause();
free(clause);
c_token = end_token;
requested_break = FALSE;
requested_continue = FALSE;
}
/*
* set link [x2|y2] {via <expression1> {inverse <expression2>}}
* set nonlinear <axis> via <expression1> inverse <expression2>
* unset link [x2|y2]
* unset nonlinear <axis>
*/
void
link_command()
{
AXIS *primary_axis = NULL;
AXIS *secondary_axis = NULL;
TBOOLEAN linked = FALSE;
int command_token = c_token; /* points to "link" or "nonlinear" */
c_token++;
/* Set variable name accepatable for the via/inverse functions */
strcpy(c_dummy_var[0], "x");
strcpy(c_dummy_var[1], "y");
if (equals(c_token, "z") || equals(c_token, "cb"))
strcpy(c_dummy_var[0], "z");
if (equals(c_token, "r"))
strcpy(c_dummy_var[0], "r");
/*
* "set nonlinear" currently supports axes x x2 y y2 z r cb
*/
if (equals(command_token,"nonlinear")) {
#ifdef NONLINEAR_AXES
AXIS_INDEX axis;
if ((axis = lookup_table(axisname_tbl, c_token)) >= 0)
secondary_axis = &axis_array[axis];
else
int_error(c_token,"not a valid nonlinear axis");
primary_axis = get_shadow_axis(secondary_axis);
/* Trap attempt to set an already-linked axis to nonlinear */
/* This catches the sequence "set link y; set nonlinear y2" */
if (secondary_axis->linked_to_primary && secondary_axis->linked_to_primary->index > 0)
int_error(NO_CARET,"must unlink axis before setting it to nonlinear");
if (secondary_axis->linked_to_secondary && secondary_axis->linked_to_secondary->index > 0)
int_error(NO_CARET,"must unlink axis before setting it to nonlinear");
/* Clear previous log status */
secondary_axis->log = FALSE;
secondary_axis->ticdef.logscaling = FALSE;
#else
int_error(command_token, "This copy of gnuplot does not support nonlinear axes");
#endif
/*
* "set link" applies to either x|x2 or y|y2
* Flag the axes as being linked, and copy the range settings
* from the primary axis into the linked secondary axis
*/
} else {
if (almost_equals(c_token,"x$2")) {
primary_axis = &axis_array[FIRST_X_AXIS];
secondary_axis = &axis_array[SECOND_X_AXIS];
} else if (almost_equals(c_token,"y$2")) {
primary_axis = &axis_array[FIRST_Y_AXIS];
secondary_axis = &axis_array[SECOND_Y_AXIS];
} else {
int_error(c_token,"expecting x2 or y2");
}
/* This catches the sequence "set nonlinear x; set link x2" */
if (primary_axis->linked_to_primary)
int_error(NO_CARET, "You must clear nonlinear x or y before linking it");
/* This catches the sequence "set nonlinear x2; set link x2" */
if (secondary_axis->linked_to_primary && secondary_axis->linked_to_primary->index <= 0)
int_error(NO_CARET, "You must clear nonlinear x2 or y2 before linking it");
}
c_token++;
/* "unset link {x|y}" command */
if (equals(command_token-1,"unset")) {
primary_axis->linked_to_secondary = NULL;
if (secondary_axis->linked_to_primary == NULL)
/* It wasn't linked anyhow */
return;
else
secondary_axis->linked_to_primary = NULL;
/* FIXME: could return here except for the need to free link_udf->at */
linked = FALSE;
} else {
linked = TRUE;
}
/* Initialize the action tables for the mapping function[s] */
if (!primary_axis->link_udf) {
primary_axis->link_udf = gp_alloc(sizeof(udft_entry),"link_at");
memset(primary_axis->link_udf, 0, sizeof(udft_entry));
}
if (!secondary_axis->link_udf) {
secondary_axis->link_udf = gp_alloc(sizeof(udft_entry),"link_at");
memset(secondary_axis->link_udf, 0, sizeof(udft_entry));
}
if (equals(c_token,"via")) {
parse_link_via(secondary_axis->link_udf);
if (almost_equals(c_token,"inv$erse")) {
parse_link_via(primary_axis->link_udf);
} else {
int_warn(c_token,"inverse mapping function required");
linked = FALSE;
}
}
#ifdef NONLINEAR_AXES
else if (equals(command_token,"nonlinear") && linked) {
int_warn(c_token,"via mapping function required");
linked = FALSE;
}
if (equals(command_token,"nonlinear") && linked) {
/* Save current user-visible axis range (note reversed order!) */
struct udft_entry *temp = primary_axis->link_udf;
primary_axis->link_udf = secondary_axis->link_udf;
secondary_axis->link_udf = temp;
secondary_axis->linked_to_primary = primary_axis;
primary_axis->linked_to_secondary = secondary_axis;
clone_linked_axes(secondary_axis, primary_axis);
} else
#endif
/* Clone the range information */
if (linked) {
secondary_axis->linked_to_primary = primary_axis;
primary_axis->linked_to_secondary = secondary_axis;
clone_linked_axes(primary_axis, secondary_axis);
} else {
free_at(secondary_axis->link_udf->at);
secondary_axis->link_udf->at = NULL;
free_at(primary_axis->link_udf->at);
primary_axis->link_udf->at = NULL;
/* Shouldn't be necessary, but it doesn't hurt */
primary_axis->linked_to_secondary = NULL;
secondary_axis->linked_to_primary = NULL;
}
if (secondary_axis->index == POLAR_AXIS)
rrange_to_xy();
}
/* process the 'load' command */
void
load_command()
{
FILE *fp;
char *save_file;
c_token++;
save_file = try_to_get_string();
if (!save_file)
int_error(c_token, "expecting filename");
gp_expand_tilde(&save_file);
fp = strcmp(save_file, "-") ? loadpath_fopen(save_file, "r") : stdout;
load_file(fp, save_file, 1);
}
/* null command */
void
null_command()
{
return;
}
/* Clauses enclosed by curly brackets:
* do for [i = 1:N] { a; b; c; }
* if (<test>) {
* line1;
* line2;
* } else {
* ...
* }
*/
/* Find the start and end character positions within gp_input_line
* bounding a clause delimited by {...}.
* Assumes that c_token indexes the opening left curly brace.
* Returns the index of the first token after the closing curly brace.
*/
int
find_clause(int *clause_start, int *clause_end)
{
int i, depth;
*clause_start = token[c_token].start_index;
for (i=++c_token, depth=1; i<num_tokens; i++) {
if (equals(i,"{"))
depth++;
else if (equals(i,"}"))
depth--;
if (depth == 0)
break;
}
*clause_end = token[i].start_index;
return (i+1);
}
void
begin_clause()
{
clause_depth++;
c_token++;
return;
}
void
end_clause()
{
if (clause_depth == 0)
int_error(c_token, "unexpected }");
else
clause_depth--;
c_token++;
return;
}
void
clause_reset_after_error()
{
if (clause_depth)
FPRINTF((stderr,"CLAUSE RESET after error at depth %d\n",clause_depth));
clause_depth = 0;
iteration_depth = 0;
}
/* helper routine to multiplex mouse event handling with a timed pause command */
void
timed_pause(double sleep_time)
{
#if defined(HAVE_USLEEP) && defined(USE_MOUSE) && !defined(_WIN32)
if (term->waitforinput) /* If the terminal supports it */
while (sleep_time > 0.05) { /* we poll 20 times a second */
usleep(50000); /* Sleep for 50 msec */
check_for_mouse_events();
sleep_time -= 0.05;
}
usleep((useconds_t)(sleep_time * 1e6));
check_for_mouse_events();
#else
GP_SLEEP(sleep_time);
#endif
}
/* process the 'pause' command */
#define EAT_INPUT_WITH(slurp) do {int junk=0; do {junk=slurp;} while (junk != EOF && junk != '\n');} while (0)
void
pause_command()
{
int text = 0;
double sleep_time;
static char *buf = NULL;
c_token++;
#ifdef USE_MOUSE
paused_for_mouse = 0;
if (equals(c_token, "mouse")) {
sleep_time = -1;
c_token++;
/* EAM FIXME - This is not the correct test; what we really want */
/* to know is whether or not the terminal supports mouse feedback */
/* if (term_initialised) { */
if (mouse_setting.on && term) {
struct udvt_entry *current;
int end_condition = 0;
while (!(END_OF_COMMAND)) {
if (almost_equals(c_token, "key$press")) {
end_condition |= PAUSE_KEYSTROKE;
c_token++;
} else if (equals(c_token, ",")) {
c_token++;
} else if (equals(c_token, "any")) {
end_condition |= PAUSE_ANY;
c_token++;
} else if (equals(c_token, "button1")) {
end_condition |= PAUSE_BUTTON1;
c_token++;
} else if (equals(c_token, "button2")) {
end_condition |= PAUSE_BUTTON2;
c_token++;
} else if (equals(c_token, "button3")) {
end_condition |= PAUSE_BUTTON3;
c_token++;
} else if (equals(c_token, "close")) {
end_condition |= PAUSE_WINCLOSE;
c_token++;
} else
break;
}
if (end_condition)
paused_for_mouse = end_condition;
else
paused_for_mouse = PAUSE_CLICK;
/* Set the pause mouse return codes to -1 */
current = add_udv_by_name("MOUSE_KEY");
Ginteger(¤t->udv_value,-1);
current = add_udv_by_name("MOUSE_BUTTON");
Ginteger(¤t->udv_value,-1);
} else
int_warn(NO_CARET, "Mousing not active");
} else
#endif
sleep_time = real_expression();
if (END_OF_COMMAND) {
free(buf); /* remove the previous message */
buf = gp_strdup("paused"); /* default message, used in Windows GUI pause dialog */
} else {
char *tmp = try_to_get_string();
if (!tmp)
int_error(c_token, "expecting string");
else {
#ifdef _WIN32
free(buf);
buf = tmp;
if (sleep_time >= 0) {
fputs(buf, stderr);
}
#elif defined(OS2)
free(buf);
buf = tmp;
if (strcmp(term->name, "pm") != 0 || sleep_time >= 0)
fputs(buf, stderr);
#else /* Not WIN32 or OS2 */
free(buf);
buf = tmp;
fputs(buf, stderr);
#endif
text = 1;
}
}
if (sleep_time < 0) {
#if defined(_WIN32)
ctrlc_flag = FALSE;
# if defined(WGP_CONSOLE) && defined(USE_MOUSE)
if (!paused_for_mouse || !MousableWindowOpened()) {
int junk = 0;
if (buf) {
/* Use of fprintf() triggers a bug in MinGW + SJIS encoding */
fputs(buf, stderr); fputs("\n",stderr);
}
/* cannot use EAT_INPUT_WITH here */
do {
junk = getch();
if (ctrlc_flag)
bail_to_command_line();
} while (junk != EOF && junk != '\n' && junk != '\r');
} else /* paused_for_mouse */
# endif /* !WGP_CONSOLE */
{
if (!Pause(buf)) /* returns false if Ctrl-C or Cancel was pressed */
bail_to_command_line();
}
#elif defined(OS2)
if (strcmp(term->name, "pm") == 0 && sleep_time < 0) {
int rc;
if ((rc = PM_pause(buf)) == 0) {
/* if (!CallFromRexx)
* would help to stop REXX programs w/o raising an error message
* in RexxInterface() ...
*/
bail_to_command_line();
} else if (rc == 2) {
fputs(buf, stderr);
text = 1;
EAT_INPUT_WITH(fgetc(stdin));
}
}
#else /* !(_WIN32 || OS2) */
#ifdef USE_MOUSE
if (term && term->waitforinput) {
/* It does _not_ work to do EAT_INPUT_WITH(term->waitforinput()) */
term->waitforinput(0);
} else
#endif /* USE_MOUSE */
EAT_INPUT_WITH(fgetc(stdin));
#endif /* !(_WIN32 || OS2) */
}
if (sleep_time > 0)
timed_pause(sleep_time);
if (text != 0 && sleep_time >= 0)
fputc('\n', stderr);
screen_ok = FALSE;
}
/* process the 'plot' command */
void
plot_command()
{
plot_token = c_token++;
plotted_data_from_stdin = FALSE;
refresh_nplots = 0;
SET_CURSOR_WAIT;
#ifdef USE_MOUSE
plot_mode(MODE_PLOT);
add_udv_by_name("MOUSE_X")->udv_value.type = NOTDEFINED;
add_udv_by_name("MOUSE_Y")->udv_value.type = NOTDEFINED;
add_udv_by_name("MOUSE_X2")->udv_value.type = NOTDEFINED;
add_udv_by_name("MOUSE_Y2")->udv_value.type = NOTDEFINED;
add_udv_by_name("MOUSE_BUTTON")->udv_value.type = NOTDEFINED;
add_udv_by_name("MOUSE_SHIFT")->udv_value.type = NOTDEFINED;
add_udv_by_name("MOUSE_ALT")->udv_value.type = NOTDEFINED;
add_udv_by_name("MOUSE_CTRL")->udv_value.type = NOTDEFINED;
#endif
plotrequest();
/* Clear "hidden" flag for any plots that may have been toggled off */
if (term->modify_plots)
term->modify_plots(MODPLOTS_SET_VISIBLE, -1);
SET_CURSOR_ARROW;
}
void
print_set_output(char *name, TBOOLEAN datablock, TBOOLEAN append_p)
{
if (print_out && print_out != stderr && print_out != stdout) {
#ifdef PIPES
if (print_out_name[0] == '|') {
if (0 > pclose(print_out))
perror(print_out_name);
} else
#endif
if (0 > fclose(print_out))
perror(print_out_name);
}
free(print_out_name);
print_out_name = NULL;
print_out_var = NULL;
if (! name) {
print_out = stderr;
return;
}
if (strcmp(name, "-") == 0) {
print_out = stdout;
return;
}
#ifdef PIPES
if (name[0] == '|') {
restrict_popen();
print_out = popen(name + 1, "w");
if (!print_out)
perror(name);
else
print_out_name = name;
return;
}
#endif
if (!datablock) {
print_out = fopen(name, append_p ? "a" : "w");
if (!print_out) {
perror(name);
return;
}
} else {
print_out_var = add_udv_by_name(name);
if (print_out_var == NULL) {
fprintf(stderr, "Error allocating datablock \"%s\"\n", name);
return;
}
if (print_out_var->udv_value.type != NOTDEFINED) {
gpfree_string(&print_out_var->udv_value);
if (!append_p)
gpfree_datablock(&print_out_var->udv_value);
if (print_out_var->udv_value.type != DATABLOCK)
print_out_var->udv_value.v.data_array = NULL;
} else {
print_out_var->udv_value.v.data_array = NULL;
}
print_out_var->udv_value.type = DATABLOCK;
}
print_out_name = name;
}
char *
print_show_output()
{
if (print_out_name)
return print_out_name;
if (print_out == stdout)
return "<stdout>";
if (!print_out || print_out == stderr || !print_out_name)
return "<stderr>";
return print_out_name;
}
/* 'printerr' is the same as 'print' except that output is always to stderr */
void
printerr_command()
{
FILE *save_print_out = print_out;
print_out = stderr;
print_command();
print_out = save_print_out;
}
/* process the 'print' command */
void
print_command()
{
struct value a;
/* space printed between two expressions only */
TBOOLEAN need_space = FALSE;
char *dataline = NULL;
size_t size = 256;
size_t len = 0;
if (!print_out)
print_out = stderr;
if (print_out_var != NULL) { /* print to datablock */
dataline = (char *) gp_alloc(size, "dataline");
*dataline = NUL;
}
screen_ok = FALSE;
do {
++c_token;
if (equals(c_token, "$") && isletter(c_token+1) && !equals(c_token+2,"[")) {
char *datablock_name = parse_datablock_name();
char **line = get_datablock(datablock_name);
/* Printing a datablock into itself would cause infinite recursion */
if (print_out_var && !strcmp(datablock_name, print_out_name))
continue;
while (line && *line) {
if (print_out_var != NULL)
append_to_datablock(&print_out_var->udv_value, strdup(*line));
else
fprintf(print_out, "%s\n", *line);
line++;
}
continue;
}
if (type_udv(c_token) == ARRAY && !equals(c_token+1, "[")) {
udvt_entry *array = add_udv(c_token++);
save_array_content(print_out, array->udv_value.v.value_array);
continue;
}
const_express(&a);
if (a.type == STRING) {
if (dataline != NULL)
len = strappend(&dataline, &size, len, a.v.string_val);
else
fputs(a.v.string_val, print_out);
gpfree_string(&a);
need_space = FALSE;
} else {
if (need_space) {
if (dataline != NULL)
len = strappend(&dataline, &size, len, " ");
else
putc(' ', print_out);
}
if (dataline != NULL)
len = strappend(&dataline, &size, len, value_to_str(&a, FALSE));
else
disp_value(print_out, &a, FALSE);
need_space = TRUE;
#ifdef ARRAY_COPY_ON_REFERENCE
/* Prevents memory leakage for ARRAY variables */
gpfree_string(&a);
#endif
}
} while (!END_OF_COMMAND && equals(c_token, ","));
if (dataline != NULL) {
append_to_datablock(&print_out_var->udv_value, dataline);
} else {
(void) putc('\n', print_out);
fflush(print_out);
}
}
/* process the 'pwd' command */
void
pwd_command()
{
char *save_file = NULL;
save_file = gp_alloc(PATH_MAX, "print current dir");
if (GP_GETCWD(save_file, PATH_MAX) == NULL)
fprintf(stderr, "<invalid>\n");
else
fprintf(stderr, "%s\n", save_file);
free(save_file);
c_token++;
}
/* EAM April 2007
* The "refresh" command replots the previous graph without going back to read
* the original data. This allows zooming or other operations on data that was
* only transiently available in the input stream.
*/
void
refresh_command()
{
c_token++;
refresh_request();
}
void
refresh_request()
{
AXIS_INDEX axis;
if ( ((first_plot == NULL) && (refresh_ok == E_REFRESH_OK_2D))
|| ((first_3dplot == NULL) && (refresh_ok == E_REFRESH_OK_3D))
|| (!*replot_line && (refresh_ok == E_REFRESH_NOT_OK))
)
int_error(NO_CARET, "no active plot; cannot refresh");
if (refresh_ok == E_REFRESH_NOT_OK) {
int_warn(NO_CARET, "cannot refresh from this state. trying full replot");
replotrequest();
return;
}
/* Restore the axis range/scaling state from original plot
* Dima Kogan April 2018
*/
for (axis = 0; axis < NUMBER_OF_MAIN_VISIBLE_AXES; axis++) {
AXIS *this_axis = &axis_array[axis];
if (this_axis->set_autoscale & AUTOSCALE_MIN)
this_axis->set_min = this_axis->writeback_min;
else
this_axis->min = this_axis->set_min;
if (this_axis->set_autoscale & AUTOSCALE_MAX)
this_axis->set_max = this_axis->writeback_max;
else
this_axis->max = this_axis->set_max;
if (this_axis->linked_to_secondary)
clone_linked_axes(this_axis, this_axis->linked_to_secondary);
else if (this_axis->linked_to_primary)
clone_linked_axes(this_axis, this_axis->linked_to_primary);
}
if (refresh_ok == E_REFRESH_OK_2D) {
refresh_bounds(first_plot, refresh_nplots);
do_plot(first_plot, refresh_nplots);
update_gpval_variables(1);
} else if (refresh_ok == E_REFRESH_OK_3D) {
refresh_3dbounds(first_3dplot, refresh_nplots);
do_3dplot(first_3dplot, refresh_nplots, 0);
update_gpval_variables(1);
} else
int_error(NO_CARET, "Internal error - refresh of unknown plot type");
}
/* process the 'replot' command */
void
replot_command()
{
if (!*replot_line)
int_error(c_token, "no previous plot");
if (volatile_data && (refresh_ok != E_REFRESH_NOT_OK) && !replot_disabled) {
FPRINTF((stderr,"volatile_data %d refresh_ok %d plotted_data_from_stdin %d\n",
volatile_data, refresh_ok, plotted_data_from_stdin));
refresh_command();
return;
}
/* Disable replot for some reason; currently used by the mouse/hotkey
capable terminals to avoid replotting when some data come from stdin,
i.e. when plotted_data_from_stdin==1 after plot "-".
*/
if (replot_disabled) {
replot_disabled = FALSE;
bail_to_command_line(); /* be silent --- don't mess the screen */
}
if (!term) /* unknown terminal */
int_error(c_token, "use 'set term' to set terminal type first");
c_token++;
SET_CURSOR_WAIT;
if (term->flags & TERM_INIT_ON_REPLOT)
term->init();
replotrequest();
SET_CURSOR_ARROW;
}
/* process the 'reread' command */
void
reread_command()
{
FILE *fp = lf_top();
if (fp != (FILE *) NULL)
rewind(fp);
c_token++;
}
/* process the 'save' command */
void
save_command()
{
FILE *fp;
char *save_file = NULL;
int what;
c_token++;
what = lookup_table(&save_tbl[0], c_token);
switch (what) {
case SAVE_FUNCS:
case SAVE_SET:
case SAVE_TERMINAL:
case SAVE_VARS:
case SAVE_FIT:
c_token++;
break;
default:
break;
}
save_file = try_to_get_string();
if (!save_file)
int_error(c_token, "expecting filename");
#ifdef PIPES
if (save_file[0]=='|') {
restrict_popen();
fp = popen(save_file+1,"w");
} else
#endif
{
gp_expand_tilde(&save_file);
#ifdef _WIN32
fp = strcmp(save_file,"-") ? loadpath_fopen(save_file,"w") : stdout;
#else
fp = strcmp(save_file,"-") ? fopen(save_file,"w") : stdout;
#endif
}
if (!fp)
os_error(c_token, "Cannot open save file");
switch (what) {
case SAVE_FUNCS:
save_functions(fp);
break;
case SAVE_SET:
save_set(fp);
break;
case SAVE_TERMINAL:
save_term(fp);
break;
case SAVE_VARS:
save_variables(fp);
break;
case SAVE_FIT:
save_fit(fp);
break;
default:
save_all(fp);
}
if (stdout != fp) {
#ifdef PIPES
if (save_file[0] == '|')
(void) pclose(fp);
else
#endif
(void) fclose(fp);
}
free(save_file);
}
/* process the 'screendump' command */
void
screendump_command()
{
c_token++;
#ifdef _Windows
screen_dump();
#else
fputs("screendump not implemented\n", stderr);
#endif
}
/* set_command() is in set.c */
/* 'shell' command is processed by do_shell(), see below */
/* show_command() is in show.c */
/* process the 'splot' command */
void
splot_command()
{
plot_token = c_token++;
plotted_data_from_stdin = FALSE;
refresh_nplots = 0;
SET_CURSOR_WAIT;
#ifdef USE_MOUSE
plot_mode(MODE_SPLOT);
add_udv_by_name("MOUSE_X")->udv_value.type = NOTDEFINED;
add_udv_by_name("MOUSE_Y")->udv_value.type = NOTDEFINED;
add_udv_by_name("MOUSE_X2")->udv_value.type = NOTDEFINED;
add_udv_by_name("MOUSE_Y2")->udv_value.type = NOTDEFINED;
add_udv_by_name("MOUSE_BUTTON")->udv_value.type = NOTDEFINED;
#endif
plot3drequest();
/* Clear "hidden" flag for any plots that may have been toggled off */
if (term->modify_plots)
term->modify_plots(MODPLOTS_SET_VISIBLE, -1);
SET_CURSOR_ARROW;
}
/* process the 'stats' command */
void
stats_command()
{
#ifdef USE_STATS
statsrequest();
#else
int_error(NO_CARET,"This copy of gnuplot was not configured with support for the stats command");
#endif
}
/* process the 'system' command */
void
system_command()
{
char *cmd;
++c_token;
cmd = try_to_get_string();
do_system(cmd);
free(cmd);
}
/*
* process the 'test palette' command
* 1) Write a sequence of plot commands + set commands into a temp file
* 2) Create a datablock with palette values
* 3) Load the temp file to plot from the datablock
* The set commands then act to restore the initial state
*/
static void
test_palette_subcommand()
{
enum {test_palette_colors = 256};
struct udvt_entry *datablock;
char *save_replot_line;
TBOOLEAN save_is_3d_plot;
int i;
static const char pre1[] = "\
reset;\
uns border; se tics scale 0;\
se cbtic 0,0.1,1 mirr format '' scale 1;\
se xr[0:1];se yr[0:1];se zr[0:1];se cbr[0:1];\
set colorbox hor user orig 0.05,0.02 size 0.925,0.12;";
static const char pre2[] = "\
se lmarg scre 0.05;se rmarg scre 0.975; se bmarg scre 0.22; se tmarg scre 0.86;\
se grid; se xtics 0,0.1;se ytics 0,0.1;\
se key top right at scre 0.975,0.975 horizontal \
title 'R,G,B profiles of the current color palette';";
static const char pre3[] = "\
p NaN lc palette notit,\
$PALETTE u 1:2 t 'red' w l lt 1 lc rgb 'red',\
'' u 1:3 t 'green' w l lt 1 lc rgb 'green',\
'' u 1:4 t 'blue' w l lt 1 lc rgb 'blue',\
'' u 1:5 t 'NTSC' w l lt 1 lc rgb 'black'\
\n";
FILE *f = tmpfile();
#if defined(_MSC_VER) || defined(__MINGW32__)
/* On Vista/Windows 7 tmpfile() fails. */
if (!f) {
char buf[PATH_MAX];
/* We really want the "ANSI" version */
GetTempPathA(sizeof(buf), buf);
strcat(buf, "gnuplot-pal.tmp");
f = fopen(buf, "w+");
}
#endif
while (!END_OF_COMMAND)
c_token++;
if (!f)
int_error(NO_CARET, "cannot write temporary file");
/* Store R/G/B/Int curves in a datablock */
datablock = add_udv_by_name("$PALETTE");
if (datablock->udv_value.type != NOTDEFINED)
gpfree_datablock(&datablock->udv_value);
datablock->udv_value.type = DATABLOCK;
datablock->udv_value.v.data_array = NULL;
/* Part of the purpose for writing these values into a datablock */
/* is so that the user can read them back if desired. But data */
/* will be read back using the current numeric locale, so for */
/* consistency we must also use the locale when creating it. */
set_numeric_locale();
for (i = 0; i < test_palette_colors; i++) {
char dataline[64];
rgb_color rgb;
double ntsc;
double z = (double)i / (test_palette_colors - 1);
double gray = (sm_palette.positive == SMPAL_NEGATIVE) ? 1. - z : z;
rgb1_from_gray(gray, &rgb);
ntsc = 0.299 * rgb.r + 0.587 * rgb.g + 0.114 * rgb.b;
sprintf(dataline, "%0.4f %0.4f %0.4f %0.4f %0.4f %c",
z, rgb.r, rgb.g, rgb.b, ntsc, '\0');
append_to_datablock(&datablock->udv_value, strdup(dataline));
}
reset_numeric_locale();
/* commands to setup the test palette plot */
enable_reset_palette = 0;
save_replot_line = gp_strdup(replot_line);
save_is_3d_plot = is_3d_plot;
fputs(pre1, f);
fputs(pre2, f);
fputs(pre3, f);
/* save current gnuplot 'set' status because of the tricky sets
* for our temporary testing plot.
*/
save_set(f);
/* execute all commands from the temporary file */
rewind(f);
load_file(f, NULL, 1); /* note: it does fclose(f) */
/* enable reset_palette() and restore replot line */
enable_reset_palette = 1;
free(replot_line);
replot_line = save_replot_line;
is_3d_plot = save_is_3d_plot;
}
/* process the 'test' command */
void
test_command()
{
int what;
int save_token = c_token++;
if (!term) /* unknown terminal */
int_error(c_token, "use 'set term' to set terminal type first");
what = lookup_table(&test_tbl[0], c_token);
switch (what) {
default:
if (!END_OF_COMMAND)
int_error(c_token, "unrecognized test option");
/* otherwise fall through to test_term */
case TEST_TERMINAL: test_term(); break;
case TEST_PALETTE: test_palette_subcommand(); break;
}
/* prevent annoying error messages if there was no previous plot */
/* and the "test" window is resized. */
if (!replot_line || !(*replot_line)) {
m_capture( &replot_line, save_token, c_token );
}
}
/* toggle a single plot on/off from the command line
* (only possible for qt, wxt, x11, win)
*/
void
toggle_command()
{
int plotno = -1;
char *plottitle = NULL;
TBOOLEAN foundit = FALSE;
c_token++;
if (equals(c_token, "all")) {
c_token++;
} else if ((plottitle = try_to_get_string()) != NULL) {
struct curve_points *plot;
int length = strlen(plottitle);
if (refresh_ok == E_REFRESH_OK_2D)
plot = first_plot;
else if (refresh_ok == E_REFRESH_OK_3D)
plot = (struct curve_points *)first_3dplot;
else
plot = NULL;
for (plotno = 0; plot != NULL; plot = plot->next, plotno++) {
if (plot->title)
if (!strcmp(plot->title, plottitle)
|| (plottitle[length-1] == '*' && !strncmp(plot->title, plottitle, length-1))) {
foundit = TRUE;
break;
}
}
free(plottitle);
if (!foundit) {
int_warn(NO_CARET,"Did not find a plot with that title");
return;
}
} else {
plotno = int_expression() - 1;
}
if (term->modify_plots)
term->modify_plots(MODPLOTS_INVERT_VISIBILITIES, plotno);
}
/* Begin DEPRECATED section */
/* process the 'update' command */
void
update_command()
{
/* old parameter filename */
char *opfname = NULL;
/* new parameter filename */
char *npfname = NULL;
/* 5.2 gets a warning; after that the command goes away */
int_warn(NO_CARET, "DEPRECATED command 'update', please use 'save fit' instead");
c_token++;
if (!(opfname = try_to_get_string()))
int_error(c_token, "Parameter filename expected");
if (!END_OF_COMMAND && !(npfname = try_to_get_string()))
int_error(c_token, "New parameter filename expected");
update(opfname, npfname);
free(npfname);
free(opfname);
}
/* End DEPRECATED section */
/* the "import" command is only implemented if support is configured for */
/* using functions from external shared objects as plugins. */
void
import_command()
{
int start_token = c_token;
#ifdef HAVE_EXTERNAL_FUNCTIONS
struct udft_entry *udf;
int dummy_num = 0;
char save_dummy[MAX_NUM_VAR][MAX_ID_LEN+1];
if (!equals(++c_token + 1, "("))
int_error(c_token, "Expecting function template");
memcpy(save_dummy, c_dummy_var, sizeof(save_dummy));
do {
c_token += 2; /* skip to the next dummy */
copy_str(c_dummy_var[dummy_num++], c_token, MAX_ID_LEN);
} while (equals(c_token + 1, ",") && (dummy_num < MAX_NUM_VAR));
if (equals(++c_token, ","))
int_error(c_token + 1, "function contains too many parameters");
if (!equals(c_token++, ")"))
int_error(c_token, "missing ')'");
if (!equals(c_token, "from"))
int_error(c_token, "Expecting 'from <sharedobj>'");
c_token++;
udf = dummy_func = add_udf(start_token+1);
udf->dummy_num = dummy_num;
free_at(udf->at); /* In case there was a previous function by this name */
udf->at = external_at(udf->udf_name);
memcpy(c_dummy_var, save_dummy, sizeof(save_dummy));
dummy_func = NULL; /* dont let anyone else use our workspace */
if (!udf->at)
int_error(NO_CARET, "failed to load external function");
/* Don't copy the definition until we know it worked */
m_capture(&(udf->definition), start_token, c_token - 1);
#else
while (!END_OF_COMMAND)
c_token++;
int_error(start_token, "This copy of gnuplot does not support plugins");
#endif
}
/* process invalid commands and, on OS/2, REXX commands */
void
invalid_command()
{
int save_token = c_token;
#ifdef OS2
if (token[c_token].is_token) {
int rc;
rc = ExecuteMacro(gp_input_line + token[c_token].start_index,
token[c_token].length);
if (rc == 0) {
c_token = num_tokens = 0;
return;
}
}
#endif
/* Skip the rest of the command; otherwise we're left pointing to */
/* the middle of a command we already know is not valid. */
while (!END_OF_COMMAND)
c_token++;
int_error(save_token, "invalid command");
}
/*
* Auxiliary routines
*/
/* used by changedir_command() */
static int
changedir(char *path)
{
#if defined(MSDOS)
/* first deal with drive letter */
if (isalpha((unsigned char)path[0]) && (path[1] == ':')) {
int driveno = toupper((unsigned char)path[0]) - 'A'; /* 0=A, 1=B, ... */
# if defined(__EMX__)
(void) _chdrive(driveno + 1);
# elif defined(__DJGPP__)
(void) setdisk(driveno);
# endif
path += 2; /* move past drive letter */
}
/* then change to actual directory */
if (*path)
if (chdir(path))
return 1;
return 0; /* should report error with setdrive also */
#elif defined(_WIN32)
LPWSTR pathw = UnicodeText(path, encoding);
int ret = !SetCurrentDirectoryW(pathw);
free(pathw);
return ret;
#elif defined(__EMX__) && defined(OS2)
return _chdir2(path);
#else
return chdir(path);
#endif /* MSDOS etc. */
}
/* used by replot_command() */
void
replotrequest()
{
/* do not store directly into the replot_line string until the
* new plot line has been successfully plotted. This way,
* if user makes a typo in a replot line, they do not have
* to start from scratch. The replot_line will be committed
* after do_plot has returned, whence we know all is well
*/
if (END_OF_COMMAND) {
char *rest_args = &gp_input_line[token[c_token].start_index];
size_t replot_len = strlen(replot_line);
size_t rest_len = strlen(rest_args);
/* preserve commands following 'replot ;' */
/* move rest of input line to the start
* necessary because of realloc() in extend_input_line() */
memmove(gp_input_line,rest_args,rest_len+1);
/* reallocs if necessary */
while (gp_input_line_len < replot_len+rest_len+1)
extend_input_line();
/* move old rest args off begin of input line to
* make space for replot_line */
memmove(gp_input_line+replot_len,gp_input_line,rest_len+1);
/* copy previous plot command to start of input line */
memcpy(gp_input_line, replot_line, replot_len);
} else {
char *replot_args = NULL; /* else m_capture will free it */
int last_token = num_tokens - 1;
/* length = length of old part + length of new part + ", " + \0 */
size_t newlen = strlen(replot_line) + token[last_token].start_index
+ token[last_token].length - token[c_token].start_index + 3;
m_capture(&replot_args, c_token, last_token); /* might be empty */
while (gp_input_line_len < newlen)
extend_input_line();
strcpy(gp_input_line, replot_line);
strcat(gp_input_line, ", ");
strcat(gp_input_line, replot_args);
free(replot_args);
}
plot_token = 0; /* whole line to be saved as replot line */
SET_REFRESH_OK(E_REFRESH_NOT_OK, 0); /* start of replot will destory existing data */
screen_ok = FALSE;
num_tokens = scanner(&gp_input_line, &gp_input_line_len);
c_token = 1; /* Skip the "plot" token */
if (almost_equals(0,"test")) {
c_token = 0;
test_command();
} else if (almost_equals(0,"s$plot"))
plot3drequest();
else
plotrequest();
}
/* Is 'set view map' currently working inside 'splot' or not? Calculation of
* mouse coordinates and the corresponding routines must know it, because
* 'splot' can be either true 3D plot or a 2D map.
* This flag is set when entering splot command and 'set view map', i.e. by
* splot_map_activate(), and reset when calling splot_map_deactivate().
*/
static int splot_map_active = 0;
/* Store values reset by 'set view map' during splot, used by those two
* routines below.
*/
static float splot_map_surface_rot_x;
static float splot_map_surface_rot_z;
static float splot_map_surface_scale;
/* utility routine for splot_map_activate/deactivate */
static void
flip_y_axis()
{
struct axis *yaxis = &axis_array[FIRST_Y_AXIS];
double temp = yaxis->min;
yaxis->min = yaxis->max;
yaxis->max = temp;
if (yaxis->linked_to_primary) {
yaxis = yaxis->linked_to_primary;
temp = yaxis->min;
yaxis->min = yaxis->max;
yaxis->max = temp;
}
}
/* This routine is called at the beginning of 'splot'. It sets up some splot
* parameters needed to present the 'set view map'.
*/
void
splot_map_activate()
{
if (splot_map_active)
return;
splot_map_active = 1;
/* save current values */
splot_map_surface_rot_x = surface_rot_x;
splot_map_surface_rot_z = surface_rot_z ;
splot_map_surface_scale = surface_scale;
/* set new values */
surface_rot_x = 180;
surface_rot_z = 0;
/* version 4 had constant value surface_scale = 1.3 */
surface_scale = 1.425 * mapview_scale;
/* The Y axis runs backwards from a normal 2D plot */
flip_y_axis();
}
/* This routine is called at the end of 3D plot evaluation to undo the
* changes needed for 'set view map'.
*/
void
splot_map_deactivate()
{
if (!splot_map_active)
return;
splot_map_active = 0;
/* restore the original values */
surface_rot_x = splot_map_surface_rot_x;
surface_rot_z = splot_map_surface_rot_z;
surface_scale = splot_map_surface_scale;
/* The Y axis runs backwards from a normal 2D plot */
flip_y_axis();
}
/* Support for input, shell, and help for various systems */
#ifdef VMS
# include <descrip.h>
# include <rmsdef.h>
# include <smgdef.h>
# include <smgmsg.h>
# include <ssdef.h>
extern lib$get_input(), lib$put_output();
extern smg$read_composed_line();
extern sys$putmsg();
extern lbr$output_help();
extern lib$spawn();
int vms_len;
unsigned int status[2] = { 1, 0 };
static char Help[MAX_LINE_LEN+1] = "gnuplot";
$DESCRIPTOR(prompt_desc, PROMPT);
/* temporary fix until change to variable length */
struct dsc$descriptor_s line_desc =
{0, DSC$K_DTYPE_T, DSC$K_CLASS_S, NULL};
$DESCRIPTOR(help_desc, Help);
$DESCRIPTOR(helpfile_desc, "GNUPLOT$HELP");
/* HBB 990829: confirmed this to be used on VMS, only --> moved into
* the VMS-specific section */
void
done(int status)
{
term_reset();
gp_exit(status);
}
/* VMS-only version of read_line */
static int
read_line(const char *prompt, int start)
{
int more;
char expand_prompt[40];
current_prompt = prompt; /* HBB NEW 20040727 */
prompt_desc.dsc$w_length = strlen(prompt);
prompt_desc.dsc$a_pointer = (char *) prompt;
strcpy(expand_prompt, "_");
strncat(expand_prompt, prompt, sizeof(expand_prompt) - 2);
do {
line_desc.dsc$w_length = MAX_LINE_LEN - start;
line_desc.dsc$a_pointer = &gp_input_line[start];
switch (status[1] = smg$read_composed_line(&vms_vkid, &vms_ktid, &line_desc, &prompt_desc, &vms_len)) {
case SMG$_EOF:
done(EXIT_SUCCESS); /* ^Z isn't really an error */
break;
case RMS$_TNS: /* didn't press return in time */
vms_len--; /* skip the last character */
break; /* and parse anyway */
case RMS$_BES: /* Bad Escape Sequence */
case RMS$_PES: /* Partial Escape Sequence */
sys$putmsg(status);
vms_len = 0; /* ignore the line */
break;
case SS$_NORMAL:
break; /* everything's fine */
default:
done(status[1]); /* give the error message */
}
start += vms_len;
gp_input_line[start] = NUL;
inline_num++;
if (gp_input_line[start - 1] == '\\') {
/* Allow for a continuation line. */
prompt_desc.dsc$w_length = strlen(expand_prompt);
prompt_desc.dsc$a_pointer = expand_prompt;
more = 1;
--start;
} else {
line_desc.dsc$w_length = strlen(gp_input_line);
line_desc.dsc$a_pointer = gp_input_line;
more = 0;
}
} while (more);
return 0;
}
# ifdef NO_GIH
void
help_command()
{
int first = c_token;
while (!END_OF_COMMAND)
++c_token;
strcpy(Help, "GNUPLOT ");
capture(Help + 8, first, c_token - 1, sizeof(Help) - 9);
help_desc.dsc$w_length = strlen(Help);
if ((vaxc$errno = lbr$output_help(lib$put_output, 0, &help_desc,
&helpfile_desc, 0, lib$get_input)) != SS$_NORMAL)
os_error(NO_CARET, "can't open GNUPLOT$HELP");
}
# endif /* NO_GIH */
void
do_shell()
{
screen_ok = FALSE;
c_token++;
if ((vaxc$errno = lib$spawn()) != SS$_NORMAL) {
os_error(NO_CARET, "spawn error");
}
}
static void
do_system(const char *cmd)
{
if (!cmd)
return;
/* gp_input_line is filled by read_line or load_file, but
* line_desc length is set only by read_line; adjust now
*/
line_desc.dsc$w_length = strlen(cmd);
line_desc.dsc$a_pointer = (char *) cmd;
if ((vaxc$errno = lib$spawn(&line_desc)) != SS$_NORMAL)
os_error(NO_CARET, "spawn error");
(void) putc('\n', stderr);
}
#endif /* VMS */
#ifdef NO_GIH
#if defined(_Windows)
void
help_command()
{
HWND parent;
c_token++;
parent = GetDesktopWindow();
/* open help file if necessary */
help_window = HtmlHelp(parent, winhelpname, HH_GET_WIN_HANDLE, (DWORD_PTR)NULL);
if (help_window == NULL) {
help_window = HtmlHelp(parent, winhelpname, HH_DISPLAY_TOPIC, (DWORD_PTR)NULL);
if (help_window == NULL) {
fprintf(stderr, "Error: Could not open help file \"" TCHARFMT "\"\n", winhelpname);
return;
}
}
if (END_OF_COMMAND) {
/* show table of contents */
HtmlHelp(parent, winhelpname, HH_DISPLAY_TOC, (DWORD_PTR)NULL);
} else {
/* lookup topic in index */
HH_AKLINK link;
char buf[128];
#ifdef UNICODE
WCHAR wbuf[128];
#endif
int start = c_token;
while (!(END_OF_COMMAND))
c_token++;
capture(buf, start, c_token - 1, sizeof(buf));
link.cbStruct = sizeof(HH_AKLINK) ;
link.fReserved = FALSE;
#ifdef UNICODE
MultiByteToWideChar(WinGetCodepage(encoding), 0, buf, sizeof(buf), wbuf, sizeof(wbuf) / sizeof(WCHAR));
link.pszKeywords = wbuf;
#else
link.pszKeywords = buf;
#endif
link.pszUrl = NULL;
link.pszMsgText = NULL;
link.pszMsgTitle = NULL;
link.pszWindow = NULL;
link.fIndexOnFail = TRUE;
HtmlHelp(parent, winhelpname, HH_KEYWORD_LOOKUP, (DWORD_PTR)&link);
}
}
#else /* !_Windows */
#ifndef VMS
void
help_command()
{
while (!(END_OF_COMMAND))
c_token++;
fputs("This gnuplot was not built with inline help\n", stderr);
}
#endif /* VMS */
#endif /* _Windows */
#endif /* NO_GIH */
/*
* help_command: (not VMS, although it would work) Give help to the user. It
* parses the command line into helpbuf and supplies help for that string.
* Then, if there are subtopics available for that key, it prompts the user
* with this string. If more input is given, help_command is called
* recursively, with argument 0. Thus a more specific help can be supplied.
* This can be done repeatedly. If null input is given, the function returns,
* effecting a backward climb up the tree.
* David Kotz (David.Kotz@Dartmouth.edu) 10/89
* drd - The help buffer is first cleared when called with toplevel=1.
* This is to fix a bug where help is broken if ^C is pressed whilst in the
* help.
* Lars - The "int toplevel" argument is gone. I have converted it to a
* static variable.
*
* FIXME - helpbuf is never free()'d
*/
#ifndef NO_GIH
void
help_command()
{
static char *helpbuf = NULL;
static char *prompt = NULL;
static int toplevel = 1;
int base; /* index of first char AFTER help string */
int len; /* length of current help string */
TBOOLEAN more_help;
TBOOLEAN only; /* TRUE if only printing subtopics */
TBOOLEAN subtopics; /* 0 if no subtopics for this topic */
int start; /* starting token of help string */
char *help_ptr; /* name of help file */
# if defined(SHELFIND)
static char help_fname[256] = ""; /* keep helpfilename across calls */
# endif
if ((help_ptr = getenv("GNUHELP")) == (char *) NULL)
# ifndef SHELFIND
/* if can't find environment variable then just use HELPFILE */
/* patch by David J. Liu for getting GNUHELP from home directory */
# ifdef __DJGPP__
help_ptr = HelpFile;
# else
help_ptr = HELPFILE;
# endif
#ifdef OS2
{
/* look in the path where the executable lives */
static char buf[MAXPATHLEN];
char *ptr;
_execname(buf, sizeof(buf));
_fnslashify(buf);
ptr=strrchr(buf, '/');
if (ptr) {
*(ptr+1)='\0';
strcat(buf, HELPFILE);
help_ptr=&buf[0];
}
else
help_ptr = HELPFILE;
}
#endif
/* end of patch - DJL */
# else /* !SHELFIND */
/* try whether we can find the helpfile via shell_find. If not, just
use the default. (tnx Andreas) */
if (!strchr(HELPFILE, ':') && !strchr(HELPFILE, '/') &&
!strchr(HELPFILE, '\\')) {
if (strlen(help_fname) == 0) {
strcpy(help_fname, HELPFILE);
if (shel_find(help_fname) == 0) {
strcpy(help_fname, HELPFILE);
}
}
help_ptr = help_fname;
} else {
help_ptr = HELPFILE;
}
# endif /* !SHELFIND */
/* Since MSDOS DGROUP segment is being overflowed we can not allow such */
/* huge static variables (1k each). Instead we dynamically allocate them */
/* on the first call to this function... */
if (helpbuf == NULL) {
helpbuf = gp_alloc(MAX_LINE_LEN, "help buffer");
prompt = gp_alloc(MAX_LINE_LEN, "help prompt");
helpbuf[0] = prompt[0] = 0;
}
if (toplevel)
helpbuf[0] = prompt[0] = 0; /* in case user hit ^c last time */
/* if called recursively, toplevel == 0; toplevel must == 1 if called
* from command() to get the same behaviour as before when toplevel
* supplied as function argument
*/
toplevel = 1;
len = base = strlen(helpbuf);
start = ++c_token;
/* find the end of the help command */
while (!(END_OF_COMMAND))
c_token++;
/* copy new help input into helpbuf */
if (len > 0)
helpbuf[len++] = ' '; /* add a space */
capture(helpbuf + len, start, c_token - 1, MAX_LINE_LEN - len);
squash_spaces(helpbuf + base, 1); /* only bother with new stuff */
len = strlen(helpbuf);
/* now, a lone ? will print subtopics only */
if (strcmp(helpbuf + (base ? base + 1 : 0), "?") == 0) {
/* subtopics only */
subtopics = 1;
only = TRUE;
helpbuf[base] = NUL; /* cut off question mark */
} else {
/* normal help request */
subtopics = 0;
only = FALSE;
}
switch (help(helpbuf, help_ptr, &subtopics)) {
case H_FOUND:{
/* already printed the help info */
/* subtopics now is true if there were any subtopics */
screen_ok = FALSE;
do {
if (subtopics && !only) {
/* prompt for subtopic with current help string */
if (len > 0) {
strcpy (prompt, "Subtopic of ");
strncat (prompt, helpbuf, MAX_LINE_LEN - 16);
strcat (prompt, ": ");
} else
strcpy(prompt, "Help topic: ");
read_line(prompt, 0);
num_tokens = scanner(&gp_input_line, &gp_input_line_len);
c_token = 0;
more_help = !(END_OF_COMMAND);
if (more_help) {
c_token--;
toplevel = 0;
/* base for next level is all of current helpbuf */
help_command();
}
} else
more_help = FALSE;
} while (more_help);
break;
}
case H_NOTFOUND:
printf("Sorry, no help for '%s'\n", helpbuf);
break;
case H_ERROR:
perror(help_ptr);
break;
default:
int_error(NO_CARET, "Impossible case in switch");
break;
}
helpbuf[base] = NUL; /* cut it off where we started */
}
#endif /* !NO_GIH */
#ifndef VMS
static void
do_system(const char *cmd)
{
int ierr;
/* (am, 19980929)
* OS/2 related note: cmd.exe returns 255 if called w/o argument.
* i.e. calling a shell by "!" will always end with an error message.
* A workaround has to include checking for EMX,OS/2, two environment
* variables,...
*/
if (!cmd)
return;
restrict_popen();
#ifdef _WIN32
{
LPWSTR wcmd = UnicodeText(cmd, encoding);
ierr = _wsystem(wcmd);
free(wcmd);
}
#else
ierr = system(cmd);
#endif
report_error(ierr);
}
/* is_history_command:
Test if line starts with an (abbreviated) history command.
Modified copy of almost_equals() (util.c).
*/
static TBOOLEAN
is_history_command(const char *line)
{
int i;
int start = 0;
int length = 0;
int after = 0;
const char str[] = "hi$story";
/* skip leading whitespace */
while (isspace((unsigned char) line[start]))
start++;
/* find end of "token" */
while ((line[start + length] != NUL) && !isspace((unsigned char) line[start + length]))
length++;
for (i = 0; i < length + after; i++) {
if (str[i] != line[start + i]) {
if (str[i] != '$')
return FALSE;
else {
after = 1;
start--; /* back up token ptr */
}
}
}
/* i now beyond end of token string */
return (after || str[i] == '$' || str[i] == NUL);
}
# ifdef USE_READLINE
/* keep some compilers happy */
static char *rlgets __PROTO((char *s, size_t n, const char *prompt));
static char *
rlgets(char *s, size_t n, const char *prompt)
{
static char *line = (char *) NULL;
static int leftover = -1; /* index of 1st char leftover from last call */
if (leftover == -1) {
/* If we already have a line, first free it */
if (line != (char *) NULL) {
free(line);
line = NULL;
/* so that ^C or int_error during readline() does
* not result in line being free-ed twice */
}
line = readline((interactive) ? prompt : "");
leftover = 0;
/* If it's not an EOF */
if (line && *line) {
# if defined(READLINE) || defined(HAVE_LIBREADLINE)
int found;
/* Initialize readline history functions */
using_history();
/* search in the history for entries containing line.
* They may have other tokens before and after line, hence
* the check on strcmp below. */
if (!is_history_command(line)) {
if (!history_full) {
found = history_search(line, -1);
if (found != -1 && !strcmp(current_history()->line,line)) {
/* this line is already in the history, remove the earlier entry */
HIST_ENTRY *removed = remove_history(where_history());
/* according to history docs we are supposed to free the stuff */
if (removed) {
free(removed->line);
free(removed->data);
free(removed);
}
}
}
add_history(line);
}
# elif defined(HAVE_LIBEDITLINE)
if (!is_history_command(line)) {
/* deleting history entries does not work, so suppress adjacent duplicates only */
int found = 0;
using_history();
if (!history_full)
found = history_search(line, -1);
if (found <= 0)
add_history(line);
}
# endif
}
}
if (line) {
/* s will be NUL-terminated here */
safe_strncpy(s, line + leftover, n);
leftover += strlen(s);
if (line[leftover] == NUL)
leftover = -1;
return s;
}
return NULL;
}
# endif /* USE_READLINE */
# if defined(MSDOS) || defined(_WIN32)
void
do_shell()
{
screen_ok = FALSE;
c_token++;
if (user_shell) {
# if defined(_WIN32)
if (WinExec(user_shell, SW_SHOWNORMAL) <= 32)
# elif defined(DJGPP)
if (system(user_shell) == -1)
# else
if (spawnl(P_WAIT, user_shell, NULL) == -1)
# endif /* !(_WIN32 || DJGPP) */
os_error(NO_CARET, "unable to spawn shell");
}
}
# elif defined(OS2)
void
do_shell()
{
screen_ok = FALSE;
c_token++;
if (user_shell) {
if (system(user_shell) == -1)
os_error(NO_CARET, "system() failed");
}
(void) putc('\n', stderr);
}
# else /* !OS2 */
/* plain old Unix */
#define EXEC "exec "
void
do_shell()
{
static char exec[100] = EXEC;
screen_ok = FALSE;
c_token++;
if (user_shell) {
if (system(safe_strncpy(&exec[sizeof(EXEC) - 1], user_shell,
sizeof(exec) - sizeof(EXEC) - 1)))
os_error(NO_CARET, "system() failed");
}
(void) putc('\n', stderr);
}
# endif /* !MSDOS */
/* read from stdin, everything except VMS */
# ifndef USE_READLINE
# if defined(MSDOS) && !defined(_Windows) && !defined(__EMX__) && !defined(DJGPP)
/* if interactive use console IO so CED will work */
#define PUT_STRING(s) cputs(s)
#define GET_STRING(s,l) ((interactive) ? cgets_emu(s,l) : fgets(s,l,stdin))
/* emulate a fgets like input function with DOS cgets */
char *
cgets_emu(char *str, int len)
{
static char buffer[128] = "";
static int leftover = 0;
if (buffer[leftover] == NUL) {
buffer[0] = 126;
cgets(buffer);
fputc('\n', stderr);
if (buffer[2] == 26)
return NULL;
leftover = 2;
}
safe_strncpy(str, buffer + leftover, len);
leftover += strlen(str);
return str;
}
# else /* !plain DOS */
# define PUT_STRING(s) fputs(s, stderr)
# define GET_STRING(s,l) fgets(s, l, stdin)
# endif /* !plain DOS */
# endif /* !USE_READLINE */
/* this function is called for non-interactive operation. Its usage is
* like fgets(), but additionally it checks for ipc events from the
* terminals waitforinput() (if USE_MOUSE, and terminal is
* mouseable). This function will be used when reading from a pipe.
* fgets() reads in at most one less than size characters from stream and
* stores them into the buffer pointed to by s.
* Reading stops after an EOF or a newline. If a newline is read, it is
* stored into the buffer. A '\0' is stored after the last character in
* the buffer. */
static char*
fgets_ipc(
char *dest, /* string to fill */
int len) /* size of it */
{
#ifdef USE_MOUSE
if (term && term->waitforinput) {
/* This a mouseable terminal --- must expect input from it */
int c; /* char gotten from waitforinput() */
size_t i=0; /* position inside dest */
dest[0] = '\0';
for (i=0; i < len-1; i++) {
c = term->waitforinput(0);
if ('\n' == c) {
dest[i] = '\n';
i++;
break;
} else if (EOF == c) {
dest[i] = '\0';
return (char*) 0;
} else {
dest[i] = c;
}
}
dest[i] = '\0';
return dest;
} else
#endif
return fgets(dest, len, stdin);
}
/* get a line from stdin, and display a prompt if interactive */
static char*
gp_get_string(char * buffer, size_t len, const char * prompt)
{
# ifdef USE_READLINE
if (interactive)
return rlgets(buffer, len, prompt);
else
return fgets_ipc(buffer, len);
# else
if (interactive)
PUT_STRING(prompt);
return GET_STRING(buffer, len);
# endif
}
/* Non-VMS version */
static int
read_line(const char *prompt, int start)
{
TBOOLEAN more = FALSE;
int last = 0;
current_prompt = prompt;
/* Once we start to read a new line, the tokens pointing into the old */
/* line are no longer valid. We used to _not_ clear things here, but */
/* that lead to errors when a mouse-triggered replot request came in */
/* while a new line was being read. Bug 3602388 Feb 2013. */
/* FIXME: If this causes problems, push it down into fgets_ipc(). */
if (start == 0) {
c_token = num_tokens = 0;
gp_input_line[0] = '\0';
}
do {
/* grab some input */
if (gp_get_string(gp_input_line + start, gp_input_line_len - start,
((more) ? ">" : prompt))
== (char *) NULL)
{
/* end-of-file */
if (interactive)
(void) putc('\n', stderr);
gp_input_line[start] = NUL;
inline_num++;
if (start > 0 && curly_brace_count == 0) /* don't quit yet - process what we have */
more = FALSE;
else
return (1); /* exit gnuplot */
} else {
/* normal line input */
/* gp_input_line must be NUL-terminated for strlen not to pass the
* the bounds of this array */
last = strlen(gp_input_line) - 1;
if (last >= 0) {
if (gp_input_line[last] == '\n') { /* remove any newline */
gp_input_line[last] = NUL;
if (last > 0 && gp_input_line[last-1] == '\r') {
gp_input_line[--last] = NUL;
}
/* Watch out that we don't backup beyond 0 (1-1-1) */
if (last > 0)
--last;
} else if (last + 2 >= gp_input_line_len) {
extend_input_line();
/* read rest of line, don't print "> " */
start = last + 1;
more = TRUE;
continue;
/* else fall through to continuation handling */
} /* if(grow buffer?) */
if (gp_input_line[last] == '\\') {
/* line continuation */
start = last;
more = TRUE;
} else
more = FALSE;
} else
more = FALSE;
}
} while (more);
return (0);
}
#endif /* !VMS */
/*
* Walk through the input line looking for string variables preceded by @.
* Replace the characters @<varname> with the contents of the string.
* Anything inside quotes is not expanded.
* Allow up to 3 levels of nested macros.
*/
void
string_expand_macros()
{
if (expand_1level_macros() && expand_1level_macros()
&& expand_1level_macros() && expand_1level_macros())
int_error(NO_CARET, "Macros nested too deeply");
}
#define COPY_CHAR gp_input_line[o++] = *c; \
after_backslash = FALSE;
int
expand_1level_macros()
{
TBOOLEAN in_squote = FALSE;
TBOOLEAN in_dquote = FALSE;
TBOOLEAN after_backslash = FALSE;
TBOOLEAN in_comment= FALSE;
int len;
int o = 0;
int nfound = 0;
char *c;
char *temp_string;
char temp_char;
char *m;
struct udvt_entry *udv;
/* Most lines have no macros */
if (!strchr(gp_input_line,'@'))
return(0);
temp_string = gp_alloc(gp_input_line_len,"string variable");
len = strlen(gp_input_line);
if (len >= gp_input_line_len) len = gp_input_line_len-1;
strncpy(temp_string,gp_input_line,len);
temp_string[len] = '\0';
for (c=temp_string; len && c && *c; c++, len--) {
switch (*c) {
case '@': /* The only tricky bit */
if (!in_squote && !in_dquote && !in_comment && isalpha((unsigned char)c[1])) {
/* Isolate the udv key as a null-terminated substring */
m = ++c;
while (isalnum((unsigned char )*c) || (*c=='_')) c++;
temp_char = *c; *c = '\0';
/* Look up the key and restore the original following char */
udv = get_udv_by_name(m);
if (udv && udv->udv_value.type == STRING) {
nfound++;
m = udv->udv_value.v.string_val;
FPRINTF((stderr,"Replacing @%s with \"%s\"\n",udv->udv_name,m));
while (strlen(m) + o + len > gp_input_line_len)
extend_input_line();
while (*m)
gp_input_line[o++] = (*m++);
} else {
int_warn( NO_CARET, "%s is not a string variable",m);
}
*c-- = temp_char;
} else
COPY_CHAR;
break;
case '"':
if (!after_backslash)
in_dquote = !in_dquote;
COPY_CHAR; break;
case '\'':
in_squote = !in_squote;
COPY_CHAR; break;
case '\\':
if (in_dquote)
after_backslash = !after_backslash;
gp_input_line[o++] = *c; break;
case '#':
if (!in_squote && !in_dquote)
in_comment = TRUE;
default :
COPY_CHAR; break;
}
}
gp_input_line[o] = '\0';
free(temp_string);
if (nfound)
FPRINTF((stderr,
"After string substitution command line is:\n\t%s\n",
gp_input_line));
return(nfound);
}
/* much more than what can be useful */
#define MAX_TOTAL_LINE_LEN (1024 * MAX_LINE_LEN)
int
do_system_func(const char *cmd, char **output)
{
#if defined(VMS) || defined(PIPES)
int c;
FILE *f;
int result_allocated, result_pos;
char* result;
int ierr = 0;
# if defined(VMS)
int chan, one = 1;
struct dsc$descriptor_s pgmdsc = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
static $DESCRIPTOR(lognamedsc, "PLOT$MAILBOX");
# endif /* VMS */
/* open stream */
# ifdef VMS
pgmdsc.dsc$a_pointer = cmd;
pgmdsc.dsc$w_length = strlen(cmd);
if (!((vaxc$errno = sys$crembx(0, &chan, 0, 0, 0, 0, &lognamedsc)) & 1))
os_error(NO_CARET, "sys$crembx failed");
if (!((vaxc$errno = lib$spawn(&pgmdsc, 0, &lognamedsc, &one)) & 1))
os_error(NO_CARET, "lib$spawn failed");
if ((f = fopen("PLOT$MAILBOX", "r")) == NULL)
os_error(NO_CARET, "mailbox open failed");
# else /* everyone else */
restrict_popen();
if ((f = popen(cmd, "r")) == NULL)
os_error(NO_CARET, "popen failed");
# endif /* everyone else */
/* get output */
result_pos = 0;
result_allocated = MAX_LINE_LEN;
result = gp_alloc(MAX_LINE_LEN, "do_system_func");
result[0] = NUL;
while (1) {
if ((c = getc(f)) == EOF)
break;
/* result <- c */
result[result_pos++] = c;
if ( result_pos == result_allocated ) {
if ( result_pos >= MAX_TOTAL_LINE_LEN ) {
result_pos--;
int_warn(NO_CARET,
"*very* long system call output has been truncated");
break;
} else {
result = gp_realloc(result, result_allocated + MAX_LINE_LEN,
"extend in do_system_func");
result_allocated += MAX_LINE_LEN;
}
}
}
result[result_pos] = NUL;
/* close stream */
ierr = pclose(f);
ierr = report_error(ierr);
result = gp_realloc(result, strlen(result)+1, "do_system_func");
*output = result;
return ierr;
#else /* VMS || PIPES */
int_warn(NO_CARET, "system() requires support for pipes");
*output = gp_strdup("");
return 0;
#endif /* VMS || PIPES */
}
static int
report_error(int ierr)
{
int reported_error;
/* FIXME: This does not seem to report all reasonable errors correctly */
if (ierr == -1 && errno != 0)
reported_error = errno;
else
reported_error = WEXITSTATUS(ierr);
fill_gpval_integer("GPVAL_SYSTEM_ERRNO", reported_error);
if (reported_error == 127)
fill_gpval_string("GPVAL_SYSTEM_ERRMSG", "command not found or shell failed");
else
fill_gpval_string("GPVAL_SYSTEM_ERRMSG", strerror(reported_error));
return reported_error;
}