add sreplace

1 files changed, 11 insertions, 0 deletions

diff --git a/str.h b/str.h
index 3f2028d..bafec19 100644
--- a/str.h
+++ b/str.h
@@ -21,6 +21,7 @@ size_t slen(const string);
 void scats(string *, strv_t);
 void scatc(string *, char);
 void sfree(string);
+void sreplace(string *str, size_t i, size_t n, strv_t with);
 string sfmt(const char *fmt, ...);
 string sdup(const char *);
 
@@ -81,5 +82,15 @@ string sdup(const char *s) {
 	return d;
 }
 
+void sreplace(string *str, size_t i, size_t n, strv_t with) {
+	string s = *str;
+	size_t new_n = DA_LEN(s) + with.n - n;
+	DA_FIT(s, new_n);
+	memmove(&s[i + with.n], &s[i + n], slen(s) - (i + n));
+	memcpy(&s[i], with.s, with.n);
+	s[new_n - 1] = 0;
+	DA_LEN(s) = new_n;
+}
+
 #endif
 #endif