Version 0.1.0 from FTP

git-svn-id: http://svn.digium.com/svn/asterisk/trunk@9 f38db490-d61c-443f-a65b-d21fe96a405b

config.c

@@ -0,0 +1,243 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * Configuration File Parser
+ * 
+ * Copyright (C) 1999, Adtran Inc. and Linux Support Services, LLC
+ *
+ * Mark Spencer <markster@linux-support.net>
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <asterisk/config.h>
+#include <asterisk/options.h>
+#include <asterisk/logger.h>
+#include "asterisk.h"
+
+struct ast_category {
+	char name[80];
+	struct ast_variable *root;
+	struct ast_category *next;
+};
+
+struct ast_config {
+	/* Maybe this structure isn't necessary but we'll keep it
+	   for now */
+	struct ast_category *root;
+};
+
+static char *strip(char *buf)
+{
+	char *start;
+	/* Strip off trailing whitespace, returns, etc */
+	while(strlen(buf) && (buf[strlen(buf)-1]<33))
+		buf[strlen(buf)-1] = '\0';
+	start = buf;
+	/* Strip off leading whitespace, returns, etc */
+	while(*start && (*start < 33))
+		*start++ = '\0';
+	return start;
+}
+
+void ast_destroy(struct ast_config *ast)
+{
+	struct ast_category *cat, *catn;
+	struct ast_variable *v, *vn;
+
+	cat = ast->root;
+	while(cat) {
+		v = cat->root;
+		while(v) {
+			vn = v;
+			free(v->name);
+			free(v->value);
+			v = v->next;
+			free(vn);
+		}
+		catn = cat;
+		cat = cat->next;
+		free(catn);
+	}
+	free(ast);
+}
+
+int ast_true(char *s)
+{
+	/* Determine if this is a true value */
+	if (!strcasecmp(s, "yes") ||
+	    !strcasecmp(s, "true") ||
+		!strcasecmp(s, "y") ||
+		!strcasecmp(s, "t") ||
+		!strcasecmp(s, "1"))
+			return -1;
+	return 0;
+}
+
+struct ast_variable *ast_variable_browse(struct ast_config *config, char *category)
+{
+	struct ast_category *cat;
+	cat = config->root;
+	while(cat) {
+		if (!strcasecmp(cat->name, category))
+			return cat->root;
+		cat = cat->next;
+	}
+	return NULL;
+}
+
+char *ast_variable_retrieve(struct ast_config *config, char *category, char *value)
+{
+	struct ast_variable *v;
+	v = ast_variable_browse(config, category);
+	while (v) {
+		if (!strcasecmp(value, v->name))
+			return v->value;
+		v=v->next;
+	}
+	return NULL;
+}
+
+struct ast_config *ast_load(char *configfile)
+{
+	char fn[256];
+	char buf[256];
+	struct ast_config *tmp=NULL;
+	struct ast_category *tmpc=NULL;
+	struct ast_variable *v, *last=NULL;
+	FILE *f;
+	char *c, *cur;
+	int lineno=0;
+	if (configfile[0] == '/') {
+		strncpy(fn, configfile, sizeof(fn));
+	} else {
+		snprintf(fn, sizeof(fn), "%s/%s", AST_CONFIG_DIR, configfile);
+	}
+	if ((option_verbose > 1) && !option_debug) {
+		ast_verbose(  VERBOSE_PREFIX_2 "Parsing '%s': ", fn);
+		fflush(stdout);
+	}
+	if ((f = fopen(fn, "r"))) {
+		if (option_debug)
+			ast_log(LOG_DEBUG, "Parsing %s\n", fn);
+		else if (option_verbose > 1)
+			ast_verbose( "Found\n");
+		tmp = malloc(sizeof(struct ast_config));
+		if (!tmp) {
+			ast_log(LOG_WARNING, "Out of memory\n");
+			fclose(f);
+			return NULL;
+		}
+		tmp->root = NULL;
+		while(!feof(f)) {
+			fgets(buf, sizeof(buf), f);
+			lineno++;
+			if (!feof(f)) {
+				/* Strip off lines using ; as comment */
+				c = strchr(buf, ';');
+				if (c)
+					*c = '\0';
+				cur = strip(buf);
+				if (strlen(cur)) {
+					/* Actually parse the entry */
+					if (cur[0] == '[') {
+						/* A category header */
+						/* XXX Don't let them use the same category twice XXX */
+						c = strchr(cur, ']');
+						if (c) {
+							*c = 0;
+							tmpc = malloc(sizeof(struct ast_category));
+							if (!tmpc) {
+								ast_destroy(tmp);
+								ast_log(LOG_WARNING,
+									"Out of memory, line %d\n", lineno);
+								fclose(f);
+								return NULL;
+							}
+							strncpy(tmpc->name, cur+1, sizeof(tmpc->name));
+							tmpc->root =  NULL;
+							tmpc->next = tmp->root;
+							tmp->root = tmpc;
+							last =  NULL;
+						} else {
+							ast_log(LOG_WARNING, 
+								"parse error: no closing ']', line %d\n", lineno);
+							ast_destroy(tmp);
+							fclose(f);
+							return NULL;
+						}
+					} else {
+						/* Just a line (variable = value) */
+						if (!tmpc) {
+							ast_log(LOG_WARNING,
+								"parse error: No category context for line %d\n", lineno);
+							ast_destroy(tmp);
+							fclose(f);
+							return NULL;
+						}
+						c = strchr(cur, '=');
+						if (c) {
+							*c = 0;
+							c++;
+							v = malloc(sizeof(struct ast_variable));
+							if (v) {
+								v->next = NULL;
+								v->name = strdup(strip(cur));
+								v->value = strdup(strip(c));
+								if (last)  
+									last->next = v;
+								else
+									tmpc->root = v;
+								last = v;
+							} else {
+								ast_log(LOG_WARNING, "Out of memory, line %d\n", lineno);
+								fclose(f);
+								ast_destroy(tmp);
+							}
+						} else {
+							ast_log(LOG_WARNING, "No = in line %d\n", lineno);
+							fclose(f);
+							ast_destroy(tmp);
+						}
+														
+					}
+				}
+			}
+		}
+		fclose(f);		
+	} else {
+		if (option_debug)
+			ast_log(LOG_DEBUG, "No file to parse: %s\n", fn);
+		else if (option_verbose > 1)
+			ast_verbose( "Not found (%s)", strerror(errno));
+	}
+	return tmp;
+}
+
+char *ast_category_browse(struct ast_config *config, char *prev)
+{	
+	struct ast_category *cat;
+	if (!prev) {
+		if (config->root)
+			return config->root->name;
+		else
+			return NULL;
+	}
+	cat = config->root;
+	while(cat) {
+		if (!strcasecmp(cat->name, prev)) {
+			if (cat->next)
+				return cat->next->name;
+			else
+				return NULL;
+		}
+		cat = cat->next;
+	}
+	return NULL;
+}