split warning options from other compiler options

[project/uci.git] / util.c

diff --git a/util.c b/util.c
index c9be293..c0f4451 100644 (file)
--- a/util.c
+++ b/util.c
@@ -16,6 +16,8 @@
  * This file contains wrappers to standard functions, which
  * throw exceptions upon failure.
  */
+#include <stdbool.h>
+#include <ctype.h>
 
 static void *uci_malloc(struct uci_context *ctx, size_t size)
 {
@@ -49,4 +51,66 @@ static char *uci_strdup(struct uci_context *ctx, const char *str)
        return ptr;
 }
 
+static bool uci_validate_name(const char *str)
+{
+       if (!*str)
+               return false;
+
+       while (*str) {
+               if (!isalnum(*str) && (*str != '_'))
+                       return false;
+               str++;
+       }
+       return true;
+}
+
+int uci_parse_tuple(struct uci_context *ctx, char *str, char **package, char **section, char **option, char **value)
+{
+       char *last = NULL;
+
+       UCI_HANDLE_ERR(ctx);
+       UCI_ASSERT(ctx, str && package && section && option);
+
+       *package = strtok(str, ".");
+       if (!*package || !uci_validate_name(*package))
+               goto error;
+
+       last = *package;
+       *section = strtok(NULL, ".");
+       if (!*section)
+               goto lastval;
+
+       last = *section;
+       *option = strtok(NULL, ".");
+       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))
+               goto error;
+       if (*option && !uci_validate_name(*option))
+               goto error;
+
+       goto done;
+
+error:
+       UCI_THROW(ctx, UCI_ERR_PARSE);
+
+done:
+       return 0;
+}