misc: Add `is_empty()`, and `skip_whitespace()`

1 files changed, 13 insertions, 0 deletions

diff --git a/misc.c b/misc.c
index e9c864b..cb4c108 100644
--- a/misc.c
+++ b/misc.c
@@ -153,6 +153,19 @@ char *create_num_str(const char *str, int num) {
 	return name;
 }
 
+int is_empty(const char *str) {
+	return (str == NULL) || (*str == '\0');
+}
+
+char *skip_whitespace(const char *str) {
+	if (is_empty(str)) {
+		return NULL;
+	} else {
+		const size_t span = strspn(str, " \t\v");
+		return (char *)&str[span];
+	}
+}
+
 int format_len(const char *fmt, ...) {
 	int len = 0;
 	va_list args;