Add cs_try_chop_delim

2 files changed, 12 insertions, 0 deletions

diff --git a/lib/const_strings.c b/lib/const_strings.c
index 09d2c5f..0c0da41 100644
--- a/lib/const_strings.c
+++ b/lib/const_strings.c
@@ -55,6 +55,17 @@ const_string cs_chop_delim(const_string *str, char delim) {
   return result;
 }
 
+bool cs_try_chop_delim(const_string *str, char delim, const_string *dst) {
+  const_string str_copy = *str;
+  const_string tmp = cs_chop_delim(&str_copy, delim);
+  if (str_copy.len == 0) {
+	return false;
+  }
+  *str = str_copy;
+  *dst = tmp;
+  return true;
+}
+
 int cs_find_delim(const_string str, char delim) {
   int n;
   for (n = 0; n < str.len && str.data[n] != delim; n++) {}
diff --git a/lib/const_strings.h b/lib/const_strings.h
index 987c6f6..bac629e 100644
--- a/lib/const_strings.h
+++ b/lib/const_strings.h
@@ -15,6 +15,7 @@ const_string cs_from_parts(char* data, int len);
 const_string cs_from_cstr(char* cstr);
 const_string cs_slice(const_string src, int from, int to);
 const_string cs_chop_delim(const_string *src, char delim);
+bool cs_try_chop_delim(const_string *str, char delim, const_string *dst);
 int cs_find_delim(const_string str, char delim);
 bool cs_eq(const_string str1, const_string str2);
 void cs_print(char *format, const_string str);