[MINOR] Add function to parse a size in configuration
diff --git a/src/standard.c b/src/standard.c
index 6ae4dd7..81cdda4 100644
--- a/src/standard.c
+++ b/src/standard.c
@@ -729,6 +729,57 @@
return NULL;
}
+/* this function converts the string starting at <text> to an unsigned int
+ * stored in <ret>. If an error is detected, the pointer to the unexpected
+ * character is returned. If the conversio is succesful, NULL is returned.
+ */
+const char *parse_size_err(const char *text, unsigned *ret) {
+ unsigned value = 0;
+
+ while (1) {
+ unsigned int j;
+
+ j = *text - '0';
+ if (j > 9)
+ break;
+ if (value > ~0U / 10)
+ return text;
+ value *= 10;
+ if (value > (value + j))
+ return text;
+ value += j;
+ text++;
+ }
+
+ switch (*text) {
+ case '\0':
+ break;
+ case 'K':
+ case 'k':
+ if (value > ~0U >> 10)
+ return text;
+ value = value << 10;
+ break;
+ case 'M':
+ case 'm':
+ if (value > ~0U >> 20)
+ return text;
+ value = value << 20;
+ break;
+ case 'G':
+ case 'g':
+ if (value > ~0U >> 30)
+ return text;
+ value = value << 30;
+ break;
+ default:
+ return text;
+ }
+
+ *ret = value;
+ return NULL;
+}
+
/* copies at most <n> characters from <src> and always terminates with '\0' */
char *my_strndup(const char *src, int n)
{