X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fuci.git;a=blobdiff_plain;f=util.c;h=a85ec9b6b6fb8bf061f0a594a1199a73fa8b0e4e;hp=0ac33c76a15042ddcd364e0773a48aa8bc260d82;hb=d4bab379481c8ef0d5710a616660f1d7144d768f;hpb=1ac34884c1cc4e808674d8901c97e31776e8fc5c

diff --git a/util.c b/util.c
index 0ac33c7..a85ec9b 100644
--- a/util.c
+++ b/util.c
@@ -13,8 +13,8 @@
  */
 
 /*
- * This file contains wrappers to standard functions, which
- * throw exceptions upon failure.
+ * This file contains misc utility functions and wrappers to standard
+ * functions, which throw exceptions upon failure.
  */
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -27,7 +27,7 @@
 #define LINEBUF	32
 #define LINEBUF_MAX	4096
 
-static void *uci_malloc(struct uci_context *ctx, size_t size)
+__plugin void *uci_malloc(struct uci_context *ctx, size_t size)
 {
 	void *ptr;
 
@@ -39,7 +39,7 @@ static void *uci_malloc(struct uci_context *ctx, size_t size)
 	return ptr;
 }
 
-static void *uci_realloc(struct uci_context *ctx, void *ptr, size_t size)
+__plugin void *uci_realloc(struct uci_context *ctx, void *ptr, size_t size)
 {
 	ptr = realloc(ptr, size);
 	if (!ptr)
@@ -48,7 +48,7 @@ static void *uci_realloc(struct uci_context *ctx, void *ptr, size_t size)
 	return ptr;
 }
 
-static char *uci_strdup(struct uci_context *ctx, const char *str)
+__plugin char *uci_strdup(struct uci_context *ctx, const char *str)
 {
 	char *ptr;
 
@@ -59,12 +59,28 @@ static char *uci_strdup(struct uci_context *ctx, const char *str)
 	return ptr;
 }
 
+/* Based on an efficient hash function published by D. J. Bernstein */
+static unsigned int djbhash(unsigned int hash, char *str)
+{
+	int len = strlen(str);
+	int i;
+
+	/* initial value */
+	if (hash == ~0)
+		hash = 5381;
+
+	for(i = 0; i < len; i++) {
+		hash = ((hash << 5) + hash) + str[i];
+	}
+	return (hash & 0x7FFFFFFF);
+}
+
 /*
  * validate strings for names and types, reject special characters
  * for names, only alphanum and _ is allowed (shell compatibility)
  * for types, we allow more characters
  */
-static bool uci_validate_str(const char *str, bool name)
+__plugin bool uci_validate_str(const char *str, bool name)
 {
 	if (!*str)
 		return false;
@@ -97,36 +113,35 @@ int uci_parse_tuple(struct uci_context *ctx, char *str, char **package, char **s
 	UCI_HANDLE_ERR(ctx);
 	UCI_ASSERT(ctx, str && package && section && option);
 
-	*package = strtok(str, ".");
+	last = strchr(str, '=');
+	if (last) {
+		*last = 0;
+		last++;
+	}
+
+	*package = strsep(&str, ".");
 	if (!*package || !uci_validate_name(*package))
 		goto error;
 
-	last = *package;
-	*section = strtok(NULL, ".");
+	*section = strsep(&str, ".");
 	if (!*section)
 		goto lastval;
 
-	last = *section;
-	*option = strtok(NULL, ".");
+	*option = strsep(&str, ".");
 	if (!*option)
 		goto lastval;
 
-	last = *option;
-
 lastval:
-	last = strchr(last, '=');
 	if (last) {
 		if (!value)
 			goto error;
 
-		*last = 0;
-		last++;
 		if (!*last)
 			goto error;
 		*value = last;
 	}
 
-	if (*section && !uci_validate_name(*section))
+	if (*section && *section[0] && !uci_validate_name(*section))
 		goto error;
 	if (*option && !uci_validate_name(*option))
 		goto error;
@@ -146,10 +161,7 @@ static void uci_parse_error(struct uci_context *ctx, char *pos, char *reason)
 	struct uci_parse_context *pctx = ctx->pctx;
 
 	pctx->reason = reason;
-	if ((pos < pctx->buf) || (pos > pctx->buf + pctx->bufsz))
-		pctx->byte = 0;
-	else
-		pctx->byte = pos - pctx->buf;
+	pctx->byte = pos - pctx->buf;
 	UCI_THROW(ctx, UCI_ERR_PARSE);
 }
 
@@ -291,6 +303,7 @@ static void parse_single_quote(struct uci_context *ctx, char **str, char **targe
  */
 static void parse_str(struct uci_context *ctx, char **str, char **target)
 {
+	bool next = true;
 	do {
 		switch(**str) {
 		case '\'':
@@ -304,6 +317,9 @@ static void parse_str(struct uci_context *ctx, char **str, char **target)
 			/* fall through */
 		case 0:
 			goto done;
+		case ';':
+			next = false;
+			goto done;
 		case '\\':
 			if (!parse_backslash(ctx, str))
 				continue;
@@ -320,7 +336,7 @@ done:
 	 * character, skip to the next one, because the whitespace will
 	 * be overwritten by a null byte here
 	 */
-	if (**str)
+	if (**str && next)
 		*str += 1;
 
 	/* terminate the parsed string */
@@ -337,7 +353,12 @@ static char *next_arg(struct uci_context *ctx, char **str, bool required, bool n
 
 	val = ptr = *str;
 	skip_whitespace(ctx, str);
-	parse_str(ctx, str, &ptr);
+	if(*str[0] == ';') {
+		*str[0] = 0;
+		*str += 1;
+	} else {
+		parse_str(ctx, str, &ptr);
+	}
 	if (!*val) {
 		if (required)
 			uci_parse_error(ctx, *str, "insufficient arguments");
@@ -351,13 +372,27 @@ done:
 	return val;
 }
 
-int uci_parse_argument(struct uci_context *ctx, char **str, char **result)
+int uci_parse_argument(struct uci_context *ctx, FILE *stream, char **str, char **result)
 {
 	UCI_HANDLE_ERR(ctx);
-	UCI_ASSERT(ctx, (str != NULL) && (*str != NULL));
+	UCI_ASSERT(ctx, str != NULL);
 	UCI_ASSERT(ctx, result != NULL);
 
+	if (ctx->pctx) {
+		if (ctx->pctx->file != stream) {
+			uci_cleanup(ctx);
+		}
+	} else {
+		uci_alloc_parse_context(ctx);
+		ctx->pctx->file = stream;
+	}
+	if (!*str) {
+		uci_getln(ctx, 0);
+		*str = ctx->pctx->buf;
+	}
+
 	*result = next_arg(ctx, str, false, false);
+
 	return 0;
 }
 
@@ -384,7 +419,7 @@ static FILE *uci_open_stream(struct uci_context *ctx, const char *filename, int
 	}
 
 	fd = open(filename, mode, UCI_FILEMODE);
-	if (fd <= 0)
+	if (fd < 0)
 		goto error;
 
 	if (flock(fd, (write ? LOCK_EX : LOCK_SH)) < 0)