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/* $Id$ */
/***
This file is part of PulseAudio.
Copyright 2004-2006 Lennart Poettering
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
PulseAudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <pulse/xmalloc.h>
#include <pulsecore/core-error.h>
#include <pulsecore/log.h>
#include <pulsecore/core-util.h>
#include <pulsecore/macro.h>
#include "conf-parser.h"
#define WHITESPACE " \t\n"
#define COMMENTS "#;\n"
/* Run the user supplied parser for an assignment */
static int next_assignment(const char *filename, unsigned line, const pa_config_item *t, const char *lvalue, const char *rvalue, void *userdata) {
pa_assert(filename);
pa_assert(t);
pa_assert(lvalue);
pa_assert(rvalue);
for (; t->parse; t++)
if (!strcmp(lvalue, t->lvalue))
return t->parse(filename, line, lvalue, rvalue, t->data, userdata);
pa_log("[%s:%u] Unknown lvalue '%s'.", filename, line, lvalue);
return -1;
}
/* Returns non-zero when c is contained in s */
static int in_string(char c, const char *s) {
pa_assert(s);
for (; *s; s++)
if (*s == c)
return 1;
return 0;
}
/* Remove all whitepsapce from the beginning and the end of *s. *s may
* be modified. */
static char *strip(char *s) {
char *b = s+strspn(s, WHITESPACE);
char *e, *l = NULL;
for (e = b; *e; e++)
if (!in_string(*e, WHITESPACE))
l = e;
if (l)
*(l+1) = 0;
return b;
}
/* Parse a variable assignment line */
static int parse_line(const char *filename, unsigned line, const pa_config_item *t, char *l, void *userdata) {
char *e, *c, *b = l+strspn(l, WHITESPACE);
if ((c = strpbrk(b, COMMENTS)))
*c = 0;
if (!*b)
return 0;
if (!(e = strchr(b, '='))) {
pa_log("[%s:%u] Missing '='.", filename, line);
return -1;
}
*e = 0;
e++;
return next_assignment(filename, line, t, strip(b), strip(e), userdata);
}
/* Go through the file and parse each line */
int pa_config_parse(const char *filename, FILE *f, const pa_config_item *t, void *userdata) {
int r = -1;
unsigned line = 0;
int do_close = !f;
pa_assert(filename);
pa_assert(t);
if (!f && !(f = fopen(filename, "r"))) {
if (errno == ENOENT) {
r = 0;
goto finish;
}
pa_log_warn("Failed to open configuration file '%s': %s",
filename, pa_cstrerror(errno));
goto finish;
}
while (!feof(f)) {
char l[256];
if (!fgets(l, sizeof(l), f)) {
if (feof(f))
break;
pa_log_warn("Failed to read configuration file '%s': %s",
filename, pa_cstrerror(errno));
goto finish;
}
if (parse_line(filename, ++line, t, l, userdata) < 0)
goto finish;
}
r = 0;
finish:
if (do_close && f)
fclose(f);
return r;
}
int pa_config_parse_int(const char *filename, unsigned line, const char *lvalue, const char *rvalue, void *data, PA_GCC_UNUSED void *userdata) {
int *i = data;
int32_t k;
pa_assert(filename);
pa_assert(lvalue);
pa_assert(rvalue);
pa_assert(data);
if (pa_atoi(rvalue, &k) < 0) {
pa_log("[%s:%u] Failed to parse numeric value: %s", filename, line, rvalue);
return -1;
}
*i = (int) k;
return 0;
}
int pa_config_parse_bool(const char *filename, unsigned line, const char *lvalue, const char *rvalue, void *data, PA_GCC_UNUSED void *userdata) {
int k;
pa_bool_t *b = data;
pa_assert(filename);
pa_assert(lvalue);
pa_assert(rvalue);
pa_assert(data);
if ((k = pa_parse_boolean(rvalue)) < 0) {
pa_log("[%s:%u] Failed to parse boolean value: %s", filename, line, rvalue);
return -1;
}
*b = !!k;
return 0;
}
int pa_config_parse_string(const char *filename, PA_GCC_UNUSED unsigned line, const char *lvalue, const char *rvalue, void *data, PA_GCC_UNUSED void *userdata) {
char **s = data;
pa_assert(filename);
pa_assert(lvalue);
pa_assert(rvalue);
pa_assert(data);
pa_xfree(*s);
*s = *rvalue ? pa_xstrdup(rvalue) : NULL;
return 0;
}
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