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-rw-r--r--src/pulsecore/conf-parser.c181
1 files changed, 181 insertions, 0 deletions
diff --git a/src/pulsecore/conf-parser.c b/src/pulsecore/conf-parser.c
new file mode 100644
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--- /dev/null
+++ b/src/pulsecore/conf-parser.c
@@ -0,0 +1,181 @@
+/* $Id$ */
+
+/***
+ This file is part of PulseAudio.
+
+ 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 <assert.h>
+#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 "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) {
+ assert(filename && t && lvalue && rvalue);
+
+ for (; t->parse; t++)
+ if (!strcmp(lvalue, t->lvalue))
+ return t->parse(filename, line, lvalue, rvalue, t->data, userdata);
+
+ pa_log(__FILE__": [%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) {
+ 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(__FILE__": [%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;
+ assert(filename && t);
+
+ if (!f && !(f = fopen(filename, "r"))) {
+ if (errno == ENOENT) {
+ r = 0;
+ goto finish;
+ }
+
+ pa_log_warn(__FILE__": WARNING: 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(__FILE__": WARNING: 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;
+ assert(filename && lvalue && rvalue && data);
+
+ if (pa_atoi(rvalue, &k) < 0) {
+ pa_log(__FILE__": [%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 *b = data, k;
+ assert(filename && lvalue && rvalue && data);
+
+ if ((k = pa_parse_boolean(rvalue)) < 0) {
+ pa_log(__FILE__": [%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;
+ assert(filename && lvalue && rvalue && data);
+
+ pa_xfree(*s);
+ *s = *rvalue ? pa_xstrdup(rvalue) : NULL;
+ return 0;
+}