MINOR: standard: Add a function to parse uints (dotted notation).
This function is useful to parse strings made of unsigned integers
and to allocate a C array of unsigned integers from there.
For instance this function allocates this array { 1, 2, 3, 4, } from
this string: "1.2.3.4".
diff --git a/src/standard.c b/src/standard.c
index efa4171..86dee44 100644
--- a/src/standard.c
+++ b/src/standard.c
@@ -4058,6 +4058,50 @@
}
}
+/*
+ * Allocate an array of unsigned int with <nums> as address from <str> string
+ * made of integer sepereated by dot characters.
+ *
+ * First, initializes the value with <sz> as address to 0 and initializes the
+ * array with <nums> as address to NULL. Then allocates the array with <nums> as
+ * address updating <sz> pointed value to the size of this array.
+ *
+ * Returns 1 if succeeded, 0 if not.
+ */
+int parse_dotted_uints(const char *str, unsigned int **nums, size_t *sz)
+{
+ unsigned int *n;
+ const char *s, *end;
+
+ s = str;
+ *sz = 0;
+ end = str + strlen(str);
+ *nums = n = NULL;
+
+ while (1) {
+ unsigned int r;
+
+ if (s >= end)
+ break;
+
+ r = read_uint(&s, end);
+ /* Expected characters after having read an uint: '\0' or '.',
+ * if '.', must not be terminal.
+ */
+ if (*s != '\0'&& (*s++ != '.' || s == end))
+ return 0;
+
+ n = my_realloc2(n, *sz + 1);
+ if (!n)
+ return 0;
+
+ n[(*sz)++] = r;
+ }
+ *nums = n;
+
+ return 1;
+}
+
/* do nothing, just a placeholder for debugging calls, the real one is in trace.c */
__attribute__((weak,format(printf, 1, 2)))
void trace(char *msg, ...)