/*
* Copyright 2008-2009 Katholieke Universiteit Leuven
*
* Use of this software is governed by the MIT license
*
* Written by Sven Verdoolaege, K.U.Leuven, Departement
* Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <isl/arg.h>
#include <isl/ctx.h>
static struct isl_arg help_arg[] = {
ISL_ARG_PHANTOM_BOOL('h', "help", NULL, "print this help, then exit")
};
static void set_default_choice(struct isl_arg *arg, void *opt)
{
*(unsigned *)(((char *)opt) + arg->offset) = arg->u.choice.default_value;
}
static void set_default_flags(struct isl_arg *arg, void *opt)
{
*(unsigned *)(((char *)opt) + arg->offset) = arg->u.flags.default_value;
}
static void set_default_bool(struct isl_arg *arg, void *opt)
{
if (arg->offset == (size_t) -1)
return;
*(unsigned *)(((char *)opt) + arg->offset) = arg->u.b.default_value;
}
static void set_default_child(struct isl_arg *arg, void *opt)
{
void *child;
if (arg->offset == (size_t) -1)
child = opt;
else {
child = calloc(1, arg->u.child.child->options_size);
*(void **)(((char *)opt) + arg->offset) = child;
}
if (child)
isl_args_set_defaults(arg->u.child.child, child);
}
static void set_default_user(struct isl_arg *arg, void *opt)
{
arg->u.user.init(((char *)opt) + arg->offset);
}
static void set_default_int(struct isl_arg *arg, void *opt)
{
*(int *)(((char *)opt) + arg->offset) = arg->u.i.default_value;
}
static void set_default_long(struct isl_arg *arg, void *opt)
{
*(long *)(((char *)opt) + arg->offset) = arg->u.l.default_value;
}
static void set_default_ulong(struct isl_arg *arg, void *opt)
{
*(unsigned long *)(((char *)opt) + arg->offset) = arg->u.ul.default_value;
}
static void set_default_str(struct isl_arg *arg, void *opt)
{
const char *str = NULL;
if (arg->u.str.default_value)
str = strdup(arg->u.str.default_value);
*(const char **)(((char *)opt) + arg->offset) = str;
}
static void set_default_str_list(struct isl_arg *arg, void *opt)
{
*(const char ***)(((char *) opt) + arg->offset) = NULL;
*(int *)(((char *) opt) + arg->u.str_list.offset_n) = 0;
}
void isl_args_set_defaults(struct isl_args *args, void *opt)
{
int i;
for (i = 0; args->args[i].type != isl_arg_end; ++i) {
switch (args->args[i].type) {
case isl_arg_choice:
set_default_choice(&args->args[i], opt);
break;
case isl_arg_flags:
set_default_flags(&args->args[i], opt);
break;
case isl_arg_bool:
set_default_bool(&args->args[i], opt);
break;
case isl_arg_child:
set_default_child(&args->args[i], opt);
break;
case isl_arg_user:
set_default_user(&args->args[i], opt);
break;
case isl_arg_int:
set_default_int(&args->args[i], opt);
break;
case isl_arg_long:
set_default_long(&args->args[i], opt);
break;
case isl_arg_ulong:
set_default_ulong(&args->args[i], opt);
break;
case isl_arg_arg:
case isl_arg_str:
set_default_str(&args->args[i], opt);
break;
case isl_arg_str_list:
set_default_str_list(&args->args[i], opt);
break;
case isl_arg_alias:
case isl_arg_footer:
case isl_arg_version:
case isl_arg_end:
break;
}
}
}
static void free_args(struct isl_arg *arg, void *opt);
static void free_child(struct isl_arg *arg, void *opt)
{
if (arg->offset == (size_t) -1)
free_args(arg->u.child.child->args, opt);
else
isl_args_free(arg->u.child.child,
*(void **)(((char *)opt) + arg->offset));
}
static void free_str_list(struct isl_arg *arg, void *opt)
{
int i;
int n = *(int *)(((char *) opt) + arg->u.str_list.offset_n);
char **list = *(char ***)(((char *) opt) + arg->offset);
for (i = 0; i < n; ++i)
free(list[i]);
free(list);
}
static void free_user(struct isl_arg *arg, void *opt)
{
if (arg->u.user.clear)
arg->u.user.clear(((char *)opt) + arg->offset);
}
static void free_args(struct isl_arg *arg, void *opt)
{
int i;
for (i = 0; arg[i].type != isl_arg_end; ++i) {
switch (arg[i].type) {
case isl_arg_child:
free_child(&arg[i], opt);
break;
case isl_arg_arg:
case isl_arg_str:
free(*(char **)(((char *)opt) + arg[i].offset));
break;
case isl_arg_str_list:
free_str_list(&arg[i], opt);
break;
case isl_arg_user:
free_user(&arg[i], opt);
break;
case isl_arg_alias:
case isl_arg_bool:
case isl_arg_choice:
case isl_arg_flags:
case isl_arg_int:
case isl_arg_long:
case isl_arg_ulong:
case isl_arg_version:
case isl_arg_footer:
case isl_arg_end:
break;
}
}
}
void isl_args_free(struct isl_args *args, void *opt)
{
if (!opt)
return;
free_args(args->args, opt);
free(opt);
}
/* Data structure for collecting the prefixes of ancestor nodes.
*
* n is the number of prefixes.
* prefix[i] for i < n is a prefix of an ancestor.
* len[i] for i < n is the length of prefix[i].
*/
struct isl_prefixes {
int n;
const char *prefix[10];
size_t len[10];
};
/* Add "prefix" to the list of prefixes and return the updated
* number of prefixes.
*/
static int add_prefix(struct isl_prefixes *prefixes, const char *prefix)
{
int n = prefixes->n;
if (!prefix)
return n;
if (prefixes->n >= 10) {
fprintf(stderr, "too many prefixes\n");
exit(EXIT_FAILURE);
}
prefixes->len[prefixes->n] = strlen(prefix);
prefixes->prefix[prefixes->n] = prefix;
prefixes->n++;
return n;
}
/* Drop all prefixes starting at "first".
*/
static void drop_prefix(struct isl_prefixes *prefixes, int first)
{
prefixes->n = first;
}
/* Print the prefixes in "prefixes".
*/
static int print_prefixes(struct isl_prefixes *prefixes)
{
int i;
int len = 0;
if (!prefixes)
return 0;
for (i = 0; i < prefixes->n; ++i) {
printf("%s-", prefixes->prefix[i]);
len += strlen(prefixes->prefix[i]) + 1;
}
return len;
}
/* Check if "name" starts with one or more of the prefixes in "prefixes",
* starting at *first. If so, advance the pointer beyond the prefixes
* and return the updated pointer. Additionally, update *first to
* the index after the last prefix found.
*/
static const char *skip_prefixes(const char *name,
struct isl_prefixes *prefixes, int *first)
{
int i;
for (i = first ? *first : 0; i < prefixes->n; ++i) {
size_t len = prefixes->len[i];
const char *prefix = prefixes->prefix[i];
if (strncmp(name, prefix, len) == 0 && name[len] == '-') {
name += len + 1;
if (first)
*first = i + 1;
}
}
return name;
}
static int print_arg_help(struct isl_arg *decl, struct isl_prefixes *prefixes,
int no)
{
int len = 0;
if (!decl->long_name) {
printf(" -%c", decl->short_name);
return 4;
}
if (decl->short_name) {
printf(" -%c, --", decl->short_name);
len += 8;
} else if (decl->flags & ISL_ARG_SINGLE_DASH) {
printf(" -");
len += 3;
} else {
printf(" --");
len += 8;
}
if (no) {
printf("no-");
len += 3;
}
len += print_prefixes(prefixes);
printf("%s", decl->long_name);
len += strlen(decl->long_name);
while ((++decl)->type == isl_arg_alias) {
printf(", --");
len += 4;
if (no) {
printf("no-");
len += 3;
}
printf("%s", decl->long_name);
len += strlen(decl->long_name);
}
return len;
}
const void *isl_memrchr(const void *s, int c, size_t n)
{
const char *p = s;
while (n-- > 0)
if (p[n] == c)
return p + n;
return NULL;
}
static int wrap_msg(const char *s, int indent, int pos)
{
int len;
int wrap_len = 75 - indent;
if (pos + 1 >= indent)
printf("\n%*s", indent, "");
else
printf("%*s", indent - pos, "");
len = strlen(s);
while (len > wrap_len) {
const char *space = isl_memrchr(s, ' ', wrap_len);
int l;
if (!space)
space = strchr(s + wrap_len, ' ');
if (!space)
break;
l = space - s;
printf("%.*s", l, s);
s = space + 1;
len -= l + 1;
printf("\n%*s", indent, "");
}
printf("%s", s);
return len;
}
static int print_help_msg(struct isl_arg *decl, int pos)
{
if (!decl->help_msg)
return pos;
return wrap_msg(decl->help_msg, 30, pos);
}
static void print_default(struct isl_arg *decl, const char *def, int pos)
{
const char *default_prefix = "[default: ";
const char *default_suffix = "]";
int len;
len = strlen(default_prefix) + strlen(def) + strlen(default_suffix);
if (!decl->help_msg) {
if (pos >= 29)
printf("\n%30s", "");
else
printf("%*s", 30 - pos, "");
pos = 0;
} else {
if (pos + len >= 48)
printf("\n%30s", "");
else
printf(" ");
}
printf("%s%s%s", default_prefix, def, default_suffix);
}
static void print_default_choice(struct isl_arg *decl, void *opt, int pos)
{
int i;
const char *s = "none";
unsigned *p;
p = (unsigned *)(((char *) opt) + decl->offset);
for (i = 0; decl->u.choice.choice[i].name; ++i)
if (decl->u.choice.choice[i].value == *p) {
s = decl->u.choice.choice[i].name;
break;
}
print_default(decl, s, pos);
}
static void print_choice_help(struct isl_arg *decl,
struct isl_prefixes *prefixes, void *opt)
{
int i;
int pos;
pos = print_arg_help(decl, prefixes, 0);
printf("=");
pos++;
for (i = 0; decl->u.choice.choice[i].name; ++i) {
if (i) {
printf("|");
pos++;
}
printf("%s", decl->u.choice.choice[i].name);
pos += strlen(decl->u.choice.choice[i].name);
}
pos = print_help_msg(decl, pos);
print_default_choice(decl, opt, pos);
printf("\n");
}
static void print_default_flags(struct isl_arg *decl, void *opt, int pos)
{
int i, first;
const char *default_prefix = "[default: ";
const char *default_suffix = "]";
int len = strlen(default_prefix) + strlen(default_suffix);
unsigned *p;
p = (unsigned *)(((char *) opt) + decl->offset);
for (i = 0; decl->u.flags.flags[i].name; ++i)
if ((*p & decl->u.flags.flags[i].mask) ==
decl->u.flags.flags[i].value)
len += strlen(decl->u.flags.flags[i].name);
if (!decl->help_msg) {
if (pos >= 29)
printf("\n%30s", "");
else
printf("%*s", 30 - pos, "");
pos = 0;
} else {
if (pos + len >= 48)
printf("\n%30s", "");
else
printf(" ");
}
printf("%s", default_prefix);
for (first = 1, i = 0; decl->u.flags.flags[i].name; ++i)
if ((*p & decl->u.flags.flags[i].mask) ==
decl->u.flags.flags[i].value) {
if (!first)
printf(",");
printf("%s", decl->u.flags.flags[i].name);
first = 0;
}
printf("%s", default_suffix);
}
static void print_flags_help(struct isl_arg *decl,
struct isl_prefixes *prefixes, void *opt)
{
int i, j;
int pos;
pos = print_arg_help(decl, prefixes, 0);
printf("=");
pos++;
for (i = 0; decl->u.flags.flags[i].name; ++i) {
if (i) {
printf(",");
pos++;
}
for (j = i;
decl->u.flags.flags[j].mask == decl->u.flags.flags[i].mask;
++j) {
if (j != i) {
printf("|");
pos++;
}
printf("%s", decl->u.flags.flags[j].name);
pos += strlen(decl->u.flags.flags[j].name);
}
i = j - 1;
}
pos = print_help_msg(decl, pos);
print_default_flags(decl, opt, pos);
printf("\n");
}
static void print_bool_help(struct isl_arg *decl,
struct isl_prefixes *prefixes, void *opt)
{
int pos;
unsigned *p = opt ? (unsigned *)(((char *) opt) + decl->offset) : NULL;
int no = p ? *p == 1 : 0;
pos = print_arg_help(decl, prefixes, no);
pos = print_help_msg(decl, pos);
if (decl->offset != (size_t) -1)
print_default(decl, no ? "yes" : "no", pos);
printf("\n");
}
static int print_argument_name(struct isl_arg *decl, const char *name, int pos)
{
printf("%c<%s>", decl->long_name ? '=' : ' ', name);
return pos + 3 + strlen(name);
}
static void print_int_help(struct isl_arg *decl,
struct isl_prefixes *prefixes, void *opt)
{
int pos;
char val[20];
int *p = (int *)(((char *) opt) + decl->offset);
pos = print_arg_help(decl, prefixes, 0);
pos = print_argument_name(decl, decl->argument_name, pos);
pos = print_help_msg(decl, pos);
snprintf(val, sizeof(val), "%d", *p);
print_default(decl, val, pos);
printf("\n");
}
static void print_long_help(struct isl_arg *decl,
struct isl_prefixes *prefixes, void *opt)
{
int pos;
long *p = (long *)(((char *) opt) + decl->offset);
pos = print_arg_help(decl, prefixes, 0);
if (*p != decl->u.l.default_selected) {
printf("[");
pos++;
}
printf("=long");
pos += 5;
if (*p != decl->u.l.default_selected) {
printf("]");
pos++;
}
print_help_msg(decl, pos);
printf("\n");
}
static void print_ulong_help(struct isl_arg *decl,
struct isl_prefixes *prefixes)
{
int pos;
pos = print_arg_help(decl, prefixes, 0);
printf("=ulong");
pos += 6;
print_help_msg(decl, pos);
printf("\n");
}
static void print_str_help(struct isl_arg *decl,
struct isl_prefixes *prefixes, void *opt)
{
int pos;
const char *a = decl->argument_name ? decl->argument_name : "string";
const char **p = (const char **)(((char *) opt) + decl->offset);
pos = print_arg_help(decl, prefixes, 0);
pos = print_argument_name(decl, a, pos);
pos = print_help_msg(decl, pos);
if (*p)
print_default(decl, *p, pos);
printf("\n");
}
static void print_str_list_help(struct isl_arg *decl,
struct isl_prefixes *prefixes)
{
int pos;
const char *a = decl->argument_name ? decl->argument_name : "string";
pos = print_arg_help(decl, prefixes, 0);
pos = print_argument_name(decl, a, pos);
pos = print_help_msg(decl, pos);
printf("\n");
}
static void print_help(struct isl_arg *arg,
struct isl_prefixes *prefixes, void *opt)
{
int i;
int any = 0;
for (i = 0; arg[i].type != isl_arg_end; ++i) {
if (arg[i].flags & ISL_ARG_HIDDEN)
continue;
switch (arg[i].type) {
case isl_arg_flags:
print_flags_help(&arg[i], prefixes, opt);
any = 1;
break;
case isl_arg_choice:
print_choice_help(&arg[i], prefixes, opt);
any = 1;
break;
case isl_arg_bool:
print_bool_help(&arg[i], prefixes, opt);
any = 1;
break;
case isl_arg_int:
print_int_help(&arg[i], prefixes, opt);
any = 1;
break;
case isl_arg_long:
print_long_help(&arg[i], prefixes, opt);
any = 1;
break;
case isl_arg_ulong:
print_ulong_help(&arg[i], prefixes);
any = 1;
break;
case isl_arg_str:
print_str_help(&arg[i], prefixes, opt);
any = 1;
break;
case isl_arg_str_list:
print_str_list_help(&arg[i], prefixes);
any = 1;
break;
case isl_arg_alias:
case isl_arg_version:
case isl_arg_arg:
case isl_arg_footer:
case isl_arg_child:
case isl_arg_user:
case isl_arg_end:
break;
}
}
for (i = 0; arg[i].type != isl_arg_end; ++i) {
void *child;
int first;
if (arg[i].type != isl_arg_child)
continue;
if (arg[i].flags & ISL_ARG_HIDDEN)
continue;
if (any)
printf("\n");
if (arg[i].help_msg)
printf(" %s\n", arg[i].help_msg);
if (arg[i].offset == (size_t) -1)
child = opt;
else
child = *(void **)(((char *) opt) + arg[i].offset);
first = add_prefix(prefixes, arg[i].long_name);
print_help(arg[i].u.child.child->args, prefixes, child);
drop_prefix(prefixes, first);
any = 1;
}
}
static const char *prog_name(const char *prog)
{
const char *slash;
slash = strrchr(prog, '/');
if (slash)
prog = slash + 1;
if (strncmp(prog, "lt-", 3) == 0)
prog += 3;
return prog;
}
static int any_version(struct isl_arg *decl)
{
int i;
for (i = 0; decl[i].type != isl_arg_end; ++i) {
switch (decl[i].type) {
case isl_arg_version:
return 1;
case isl_arg_child:
if (any_version(decl[i].u.child.child->args))
return 1;
break;
default:
break;
}
}
return 0;
}
static void print_help_and_exit(struct isl_arg *arg, const char *prog,
void *opt)
{
int i;
struct isl_prefixes prefixes = { 0 };
printf("Usage: %s [OPTION...]", prog_name(prog));
for (i = 0; arg[i].type != isl_arg_end; ++i)
if (arg[i].type == isl_arg_arg)
printf(" %s", arg[i].argument_name);
printf("\n\n");
print_help(arg, &prefixes, opt);
printf("\n");
if (any_version(arg))
printf(" -V, --version\n");
print_bool_help(help_arg, NULL, NULL);
for (i = 0; arg[i].type != isl_arg_end; ++i) {
if (arg[i].type != isl_arg_footer)
continue;
wrap_msg(arg[i].help_msg, 0, 0);
printf("\n");
}
exit(0);
}
static int match_long_name(struct isl_arg *decl,
const char *start, const char *end)
{
do {
if (end - start == strlen(decl->long_name) &&
!strncmp(start, decl->long_name, end - start))
return 1;
} while ((++decl)->type == isl_arg_alias);
return 0;
}
static const char *skip_dash_dash(struct isl_arg *decl, const char *arg)
{
if (!strncmp(arg, "--", 2))
return arg + 2;
if ((decl->flags & ISL_ARG_SINGLE_DASH) && arg[0] == '-')
return arg + 1;
return NULL;
}
static const char *skip_name(struct isl_arg *decl, const char *arg,
struct isl_prefixes *prefixes, int need_argument, int *has_argument)
{
const char *equal;
const char *name;
const char *end;
if (arg[0] == '-' && arg[1] && arg[1] == decl->short_name) {
if (need_argument && !arg[2])
return NULL;
if (has_argument)
*has_argument = arg[2] != '\0';
return arg + 2;
}
if (!decl->long_name)
return NULL;
name = skip_dash_dash(decl, arg);
if (!name)
return NULL;
equal = strchr(name, '=');
if (need_argument && !equal)
return NULL;
if (has_argument)
*has_argument = !!equal;
end = equal ? equal : name + strlen(name);
name = skip_prefixes(name, prefixes, NULL);
if (!match_long_name(decl, name, end))
return NULL;
return equal ? equal + 1 : end;
}
static int parse_choice_option(struct isl_arg *decl, char **arg,
struct isl_prefixes *prefixes, void *opt)
{
int i;
int has_argument;
const char *choice;
choice = skip_name(decl, arg[0], prefixes, 0, &has_argument);
if (!choice)
return 0;
if (!has_argument && (!arg[1] || arg[1][0] == '-')) {
unsigned u = decl->u.choice.default_selected;
*(unsigned *)(((char *)opt) + decl->offset) = u;
if (decl->u.choice.set)
decl->u.choice.set(opt, u);
return 1;
}
if (!has_argument)
choice = arg[1];
for (i = 0; decl->u.choice.choice[i].name; ++i) {
unsigned u;
if (strcmp(choice, decl->u.choice.choice[i].name))
continue;
u = decl->u.choice.choice[i].value;
*(unsigned *)(((char *)opt) + decl->offset) = u;
if (decl->u.choice.set)
decl->u.choice.set(opt, u);
return has_argument ? 1 : 2;
}
return 0;
}
static int set_flag(struct isl_arg *decl, unsigned *val, const char *flag,
size_t len)
{
int i;
for (i = 0; decl->u.flags.flags[i].name; ++i) {
if (strncmp(flag, decl->u.flags.flags[i].name, len))
continue;
*val &= ~decl->u.flags.flags[i].mask;
*val |= decl->u.flags.flags[i].value;
return 1;
}
return 0;
}
static int parse_flags_option(struct isl_arg *decl, char **arg,
struct isl_prefixes *prefixes, void *opt)
{
int has_argument;
const char *flags;
const char *comma;
unsigned val;
flags = skip_name(decl, arg[0], prefixes, 0, &has_argument);
if (!flags)
return 0;
if (!has_argument && !arg[1])
return 0;
if (!has_argument)
flags = arg[1];
val = 0;
while ((comma = strchr(flags, ',')) != NULL) {
if (!set_flag(decl, &val, flags, comma - flags))
return 0;
flags = comma + 1;
}
if (!set_flag(decl, &val, flags, strlen(flags)))
return 0;
*(unsigned *)(((char *)opt) + decl->offset) = val;
return has_argument ? 1 : 2;
}
static int parse_bool_option(struct isl_arg *decl, char **arg,
struct isl_prefixes *prefixes, void *opt)
{
const char *name;
unsigned *p = (unsigned *)(((char *)opt) + decl->offset);
int next_prefix;
if (skip_name(decl, arg[0], prefixes, 0, NULL)) {
if ((decl->flags & ISL_ARG_BOOL_ARG) && arg[1]) {
char *endptr;
int val = strtol(arg[1], &endptr, 0);
if (*endptr == '\0' && (val == 0 || val == 1)) {
if (decl->offset != (size_t) -1)
*p = val;
if (decl->u.b.set)
decl->u.b.set(opt, val);
return 2;
}
}
if (decl->offset != (size_t) -1)
*p = 1;
if (decl->u.b.set)
decl->u.b.set(opt, 1);
return 1;
}
if (!decl->long_name)
return 0;
name = skip_dash_dash(decl, arg[0]);
if (!name)
return 0;
next_prefix = 0;
name = skip_prefixes(name, prefixes, &next_prefix);
if (strncmp(name, "no-", 3))
return 0;
name += 3;
name = skip_prefixes(name, prefixes, &next_prefix);
if (match_long_name(decl, name, name + strlen(name))) {
if (decl->offset != (size_t) -1)
*p = 0;
if (decl->u.b.set)
decl->u.b.set(opt, 0);
return 1;
}
return 0;
}
static int parse_str_option(struct isl_arg *decl, char **arg,
struct isl_prefixes *prefixes, void *opt)
{
int has_argument;
const char *s;
char **p = (char **)(((char *)opt) + decl->offset);
s = skip_name(decl, arg[0], prefixes, 0, &has_argument);
if (!s)
return 0;
if (has_argument) {
free(*p);
*p = strdup(s);
return 1;
}
if (arg[1]) {
free(*p);
*p = strdup(arg[1]);
return 2;
}
return 0;
}
static int isl_arg_str_list_append(struct isl_arg *decl, void *opt,
const char *s)
{
int *n = (int *)(((char *) opt) + decl->u.str_list.offset_n);
char **list = *(char ***)(((char *) opt) + decl->offset);
list = realloc(list, (*n + 1) * sizeof(char *));
if (!list)
return -1;
*(char ***)(((char *) opt) + decl->offset) = list;
list[*n] = strdup(s);
(*n)++;
return 0;
}
static int parse_str_list_option(struct isl_arg *decl, char **arg,
struct isl_prefixes *prefixes, void *opt)
{
int has_argument;
const char *s;
s = skip_name(decl, arg[0], prefixes, 0, &has_argument);
if (!s)
return 0;
if (has_argument) {
isl_arg_str_list_append(decl, opt, s);
return 1;
}
if (arg[1]) {
isl_arg_str_list_append(decl, opt, arg[1]);
return 2;
}
return 0;
}
static int parse_int_option(struct isl_arg *decl, char **arg,
struct isl_prefixes *prefixes, void *opt)
{
int has_argument;
const char *val;
char *endptr;
int *p = (int *)(((char *)opt) + decl->offset);
val = skip_name(decl, arg[0], prefixes, 0, &has_argument);
if (!val)
return 0;
if (has_argument) {
*p = atoi(val);
return 1;
}
if (arg[1]) {
int i = strtol(arg[1], &endptr, 0);
if (*endptr == '\0') {
*p = i;
return 2;
}
}
return 0;
}
static int parse_long_option(struct isl_arg *decl, char **arg,
struct isl_prefixes *prefixes, void *opt)
{
int has_argument;
const char *val;
char *endptr;
long *p = (long *)(((char *)opt) + decl->offset);
val = skip_name(decl, arg[0], prefixes, 0, &has_argument);
if (!val)
return 0;
if (has_argument) {
long l = strtol(val, NULL, 0);
*p = l;
if (decl->u.l.set)
decl->u.l.set(opt, l);
return 1;
}
if (arg[1]) {
long l = strtol(arg[1], &endptr, 0);
if (*endptr == '\0') {
*p = l;
if (decl->u.l.set)
decl->u.l.set(opt, l);
return 2;
}
}
if (decl->u.l.default_value != decl->u.l.default_selected) {
*p = decl->u.l.default_selected;
if (decl->u.l.set)
decl->u.l.set(opt, decl->u.l.default_selected);
return 1;
}
return 0;
}
static int parse_ulong_option(struct isl_arg *decl, char **arg,
struct isl_prefixes *prefixes, void *opt)
{
int has_argument;
const char *val;
char *endptr;
unsigned long *p = (unsigned long *)(((char *)opt) + decl->offset);
val = skip_name(decl, arg[0], prefixes, 0, &has_argument);
if (!val)
return 0;
if (has_argument) {
*p = strtoul(val, NULL, 0);
return 1;
}
if (arg[1]) {
unsigned long ul = strtoul(arg[1], &endptr, 0);
if (*endptr == '\0') {
*p = ul;
return 2;
}
}
return 0;
}
static int parse_option(struct isl_arg *decl, char **arg,
struct isl_prefixes *prefixes, void *opt);
static int parse_child_option(struct isl_arg *decl, char **arg,
struct isl_prefixes *prefixes, void *opt)
{
void *child;
int first, parsed;
if (decl->offset == (size_t) -1)
child = opt;
else
child = *(void **)(((char *)opt) + decl->offset);
first = add_prefix(prefixes, decl->long_name);
parsed = parse_option(decl->u.child.child->args, arg, prefixes, child);
drop_prefix(prefixes, first);
return parsed;
}
static int parse_option(struct isl_arg *decl, char **arg,
struct isl_prefixes *prefixes, void *opt)
{
int i;
for (i = 0; decl[i].type != isl_arg_end; ++i) {
int parsed = 0;
switch (decl[i].type) {
case isl_arg_choice:
parsed = parse_choice_option(&decl[i], arg,
prefixes, opt);
break;
case isl_arg_flags:
parsed = parse_flags_option(&decl[i], arg,
prefixes, opt);
break;
case isl_arg_int:
parsed = parse_int_option(&decl[i], arg, prefixes, opt);
break;
case isl_arg_long:
parsed = parse_long_option(&decl[i], arg,
prefixes, opt);
break;
case isl_arg_ulong:
parsed = parse_ulong_option(&decl[i], arg,
prefixes, opt);
break;
case isl_arg_bool:
parsed = parse_bool_option(&decl[i], arg,
prefixes, opt);
break;
case isl_arg_str:
parsed = parse_str_option(&decl[i], arg, prefixes, opt);
break;
case isl_arg_str_list:
parsed = parse_str_list_option(&decl[i], arg, prefixes,
opt);
break;
case isl_arg_child:
parsed = parse_child_option(&decl[i], arg,
prefixes, opt);
break;
case isl_arg_alias:
case isl_arg_arg:
case isl_arg_footer:
case isl_arg_user:
case isl_arg_version:
case isl_arg_end:
break;
}
if (parsed)
return parsed;
}
return 0;
}
static void print_version(struct isl_arg *decl)
{
int i;
for (i = 0; decl[i].type != isl_arg_end; ++i) {
switch (decl[i].type) {
case isl_arg_version:
decl[i].u.version.print_version();
break;
case isl_arg_child:
print_version(decl[i].u.child.child->args);
break;
default:
break;
}
}
}
static void print_version_and_exit(struct isl_arg *decl)
{
print_version(decl);
exit(0);
}
static int drop_argument(int argc, char **argv, int drop, int n)
{
for (; drop + n < argc; ++drop)
argv[drop] = argv[drop + n];
return argc - n;
}
static int n_arg(struct isl_arg *arg)
{
int i;
int n_arg = 0;
for (i = 0; arg[i].type != isl_arg_end; ++i)
if (arg[i].type == isl_arg_arg)
n_arg++;
return n_arg;
}
static int next_arg(struct isl_arg *arg, int a)
{
for (++a; arg[a].type != isl_arg_end; ++a)
if (arg[a].type == isl_arg_arg)
return a;
return -1;
}
/* Unless ISL_ARG_SKIP_HELP is set, check if "arg" is
* equal to "--help" and if so call print_help_and_exit.
*/
static void check_help(struct isl_args *args, char *arg, char *prog, void *opt,
unsigned flags)
{
if (ISL_FL_ISSET(flags, ISL_ARG_SKIP_HELP))
return;
if (strcmp(arg, "--help") == 0)
print_help_and_exit(args->args, prog, opt);
}
int isl_args_parse(struct isl_args *args, int argc, char **argv, void *opt,
unsigned flags)
{
int a = -1;
int skip = 0;
int i;
int n;
struct isl_prefixes prefixes = { 0 };
n = n_arg(args->args);
for (i = 1; i < argc; ++i) {
if ((strcmp(argv[i], "--version") == 0 ||
strcmp(argv[i], "-V") == 0) && any_version(args->args))
print_version_and_exit(args->args);
}
while (argc > 1 + skip) {
int parsed;
if (argv[1 + skip][0] != '-') {
a = next_arg(args->args, a);
if (a >= 0) {
char **p;
p = (char **)(((char *)opt)+args->args[a].offset);
free(*p);
*p = strdup(argv[1 + skip]);
argc = drop_argument(argc, argv, 1 + skip, 1);
--n;
} else if (ISL_FL_ISSET(flags, ISL_ARG_ALL)) {
fprintf(stderr, "%s: extra argument: %s\n",
prog_name(argv[0]), argv[1 + skip]);
exit(-1);
} else
++skip;
continue;
}
check_help(args, argv[1 + skip], argv[0], opt, flags);
parsed = parse_option(args->args, &argv[1 + skip],
&prefixes, opt);
if (parsed)
argc = drop_argument(argc, argv, 1 + skip, parsed);
else if (ISL_FL_ISSET(flags, ISL_ARG_ALL)) {
fprintf(stderr, "%s: unrecognized option: %s\n",
prog_name(argv[0]), argv[1 + skip]);
exit(-1);
} else
++skip;
}
if (n > 0) {
fprintf(stderr, "%s: expecting %d more argument(s)\n",
prog_name(argv[0]), n);
exit(-1);
}
return argc;
}