return 0;
}
+/*
+ * If the string "str" is the same as the string in "prefix", then the "arg"
+ * parameter is set to the "def" parameter and 1 is returned.
+ * If the string "str" begins with the string found in "prefix" and then a
+ * "=" sign, then the "arg" parameter is set to "str + strlen(prefix) + 1"
+ * (i.e., to the point in the string right after the prefix and the "=" sign),
+ * and 1 is returned.
+ *
+ * Otherwise, return 0 and leave "arg" untouched.
+ *
+ * When we accept both a "--key" and a "--key=<val>" option, this function
+ * can be used instead of !strcmp(arg, "--key") and then
+ * skip_prefix(arg, "--key=", &arg) to parse such an option.
+ */
+int skip_to_optional_arg_default(const char *str, const char *prefix,
+ const char **arg, const char *def);
+
+static inline int skip_to_optional_arg(const char *str, const char *prefix,
+ const char **arg)
+{
+ return skip_to_optional_arg_default(str, prefix, arg, "");
+}
+
/*
* Like skip_prefix, but promises never to read past "len" bytes of the input
* buffer, and returns the remaining number of bytes in "out" via "outlen".
return (x & 0x20) == 0;
}
+/*
+ * Like skip_prefix, but compare case-insensitively. Note that the comparison
+ * is done via tolower(), so it is strictly ASCII (no multi-byte characters or
+ * locale-specific conversions).
+ */
+static inline int skip_iprefix(const char *str, const char *prefix,
+ const char **out)
+{
+ do {
+ if (!*prefix) {
+ *out = str;
+ return 1;
+ }
+ } while (tolower(*str++) == tolower(*prefix++));
+ return 0;
+}
+
static inline int strtoul_ui(char const *s, int base, unsigned int *result)
{
unsigned long ul;