/*
* From: @(#)rpc_scan.c 1.11 89/02/22
*
* Copyright (c) 2010, Oracle America, Inc.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
* * Neither the name of the "Oracle America, Inc." nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* rpc_scan.c, Scanner for the RPC protocol compiler
* Copyright (C) 1987, Sun Microsystems, Inc.
*/
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <libintl.h>
#include "rpc_scan.h"
#include "rpc_parse.h"
#include "rpc_util.h"
#include "proto.h"
#define startcomment(where) (where[0] == '/' && where[1] == '*')
#define endcomment(where) (where[-1] == '*' && where[0] == '/')
static int pushed = 0; /* is a token pushed */
static token lasttok; /* last token, if pushed */
static void unget_token (token * tokp);
static void findstrconst (const char **str, const char **val);
static void findchrconst (const char **str, const char **val);
static void findconst (const char **str, const char **val);
static void findkind (const char **mark, token * tokp);
static int cppline (const char *line);
static int directive (const char *line);
static void printdirective (const char *line);
static void docppline (const char *line, int *lineno, const char **fname);
/*
* scan expecting 1 given token
*/
void
scan (tok_kind expect, token * tokp)
{
get_token (tokp);
if (tokp->kind != expect)
expected1 (expect);
}
/*
* scan expecting any of the 2 given tokens
*/
void
scan2 (tok_kind expect1, tok_kind expect2, token * tokp)
{
get_token (tokp);
if (tokp->kind != expect1 && tokp->kind != expect2)
{
expected2 (expect1, expect2);
}
}
/*
* scan expecting any of the 3 given token
*/
void
scan3 (tok_kind expect1, tok_kind expect2, tok_kind expect3, token * tokp)
{
get_token (tokp);
if (tokp->kind != expect1 && tokp->kind != expect2
&& tokp->kind != expect3)
{
expected3 (expect1, expect2, expect3);
}
}
/*
* scan expecting a constant, possibly symbolic
*/
void
scan_num (token *tokp)
{
get_token (tokp);
switch (tokp->kind)
{
case TOK_IDENT:
break;
default:
error (_("constant or identifier expected"));
}
}
/*
* Peek at the next token
*/
void
peek (token *tokp)
{
get_token (tokp);
unget_token (tokp);
}
/*
* Peek at the next token and scan it if it matches what you expect
*/
int
peekscan (tok_kind expect, token *tokp)
{
peek (tokp);
if (tokp->kind == expect)
{
get_token (tokp);
return 1;
}
return 0;
}
/*
* Get the next token, printing out any directive that are encountered.
*/
void
get_token (token *tokp)
{
int commenting;
if (pushed)
{
pushed = 0;
*tokp = lasttok;
return;
}
commenting = 0;
for (;;)
{
if (*where == 0)
{
for (;;)
{
if (!fgets (curline, MAXLINESIZE, fin))
{
tokp->kind = TOK_EOF;
*curline = 0;
where = curline;
return;
}
linenum++;
if (commenting)
{
break;
}
else if (cppline (curline))
{
docppline (curline, &linenum,
&infilename);
}
else if (directive (curline))
{
printdirective (curline);
}
else
{
break;
}
}
where = curline;
}
else if (isspace (*where))
{
while (isspace (*where))
{
where++; /* eat */
}
}
else if (commenting)
{
for (where++; *where; where++)
{
if (endcomment (where))
{
where++;
commenting--;
break;
}
}
}
else if (startcomment (where))
{
where += 2;
commenting++;
}
else
{
break;
}
}
/*
* 'where' is not whitespace, comment or directive Must be a token!
*/
switch (*where)
{
case ':':
tokp->kind = TOK_COLON;
where++;
break;
case ';':
tokp->kind = TOK_SEMICOLON;
where++;
break;
case ',':
tokp->kind = TOK_COMMA;
where++;
break;
case '=':
tokp->kind = TOK_EQUAL;
where++;
break;
case '*':
tokp->kind = TOK_STAR;
where++;
break;
case '[':
tokp->kind = TOK_LBRACKET;
where++;
break;
case ']':
tokp->kind = TOK_RBRACKET;
where++;
break;
case '{':
tokp->kind = TOK_LBRACE;
where++;
break;
case '}':
tokp->kind = TOK_RBRACE;
where++;
break;
case '(':
tokp->kind = TOK_LPAREN;
where++;
break;
case ')':
tokp->kind = TOK_RPAREN;
where++;
break;
case '<':
tokp->kind = TOK_LANGLE;
where++;
break;
case '>':
tokp->kind = TOK_RANGLE;
where++;
break;
case '"':
tokp->kind = TOK_STRCONST;
findstrconst (&where, &tokp->str);
break;
case '\'':
tokp->kind = TOK_CHARCONST;
findchrconst (&where, &tokp->str);
break;
case '-':
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
tokp->kind = TOK_IDENT;
findconst (&where, &tokp->str);
break;
default:
if (!(isalpha (*where) || *where == '_'))
{
char buf[100];
char *p;
s_print (buf, _("illegal character in file: "));
p = buf + strlen (buf);
if (isprint (*where))
{
s_print (p, "%c", *where);
}
else
{
s_print (p, "%d", *where);
}
error (buf);
}
findkind (&where, tokp);
break;
}
}
static void
unget_token (token * tokp)
{
lasttok = *tokp;
pushed = 1;
}
static void
findstrconst (const char **str, const char **val)
{
const char *p;
char *tmp;
int size;
p = *str;
do
{
p++;
}
while (*p && *p != '"');
if (*p == 0)
{
error (_("unterminated string constant"));
}
p++;
size = p - *str;
tmp = alloc (size + 1);
strncpy (tmp, *str, size);
tmp[size] = 0;
*val = tmp;
*str = p;
}
static void
findchrconst (const char **str, const char **val)
{
const char *p;
char *tmp;
int size;
p = *str;
do
{
p++;
}
while (*p && *p != '\'');
if (*p == 0)
{
error (_("unterminated string constant"));
}
p++;
size = p - *str;
if (size != 3)
{
error (_("empty char string"));
}
tmp = alloc (size + 1);
strncpy (tmp, *str, size);
tmp[size] = 0;
*val = tmp;
*str = p;
}
static void
findconst (const char **str, const char **val)
{
const char *p;
char *tmp;
int size;
p = *str;
if (*p == '0' && *(p + 1) == 'x')
{
p++;
do
{
p++;
}
while (isxdigit (*p));
}
else
{
do
{
p++;
}
while (isdigit (*p));
}
size = p - *str;
tmp = alloc (size + 1);
strncpy (tmp, *str, size);
tmp[size] = 0;
*val = tmp;
*str = p;
}
static const token symbols[] =
{
{TOK_CONST, "const"},
{TOK_UNION, "union"},
{TOK_SWITCH, "switch"},
{TOK_CASE, "case"},
{TOK_DEFAULT, "default"},
{TOK_STRUCT, "struct"},
{TOK_TYPEDEF, "typedef"},
{TOK_ENUM, "enum"},
{TOK_OPAQUE, "opaque"},
{TOK_BOOL, "bool"},
{TOK_VOID, "void"},
{TOK_CHAR, "char"},
{TOK_INT, "int"},
{TOK_UNSIGNED, "unsigned"},
{TOK_SHORT, "short"},
{TOK_LONG, "long"},
{TOK_HYPER, "hyper"},
{TOK_FLOAT, "float"},
{TOK_DOUBLE, "double"},
{TOK_STRING, "string"},
{TOK_PROGRAM, "program"},
{TOK_VERSION, "version"},
{TOK_EOF, "??????"},
};
static void
findkind (const char **mark, token *tokp)
{
int len;
const token *s;
const char *str;
char *tmp;
str = *mark;
for (s = symbols; s->kind != TOK_EOF; s++)
{
len = strlen (s->str);
if (strncmp (str, s->str, len) == 0)
{
if (!isalnum (str[len]) && str[len] != '_')
{
tokp->kind = s->kind;
tokp->str = s->str;
*mark = str + len;
return;
}
}
}
tokp->kind = TOK_IDENT;
for (len = 0; isalnum (str[len]) || str[len] == '_'; len++);
tmp = alloc (len + 1);
strncpy (tmp, str, len);
tmp[len] = 0;
tokp->str = tmp;
*mark = str + len;
}
static int
cppline (const char *line)
{
return line == curline && *line == '#';
}
static int
directive (const char *line)
{
return line == curline && *line == '%';
}
static void
printdirective (const char *line)
{
f_print (fout, "%s", line + 1);
}
static void
docppline (const char *line, int *lineno, const char **fname)
{
char *file;
int num;
char *p;
line++;
while (isspace (*line))
{
line++;
}
num = atoi (line);
while (isdigit (*line))
{
line++;
}
while (isspace (*line))
{
line++;
}
if (*line != '"')
{
error (_("preprocessor error"));
}
line++;
p = file = alloc (strlen (line) + 1);
while (*line && *line != '"')
{
*p++ = *line++;
}
if (*line == 0)
{
error (_("preprocessor error"));
}
*p = 0;
if (*file == 0)
{
free (file);
*fname = NULL;
}
else
{
*fname = file;
}
*lineno = num - 1;
}