From 22dec9e742a15bdf8c37e4aab628a01de4ae5301 Mon Sep 17 00:00:00 2001
From: Tenari <djz24@case.edu>
Date: Fri, 5 Jun 2026 07:54:06 -0500
Subject: [PATCH] new string fn

---
 all.h    |  1 +
 string.c | 15 +++++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/all.h b/all.h
index 1ab3f4c..c3ab619 100644
--- a/all.h
+++ b/all.h
@@ -683,6 +683,7 @@ fn bool stringDeleteCodepointsBetweenByteOffsetsInclusive(String* s, u32 start,
 fn u32 stringCountLines(String s);
 fn u32 stringLineLen(String s, u32 line_number);
 fn u32 stringLineStartByteOffset(String s, u32 line_number);
+fn bool stringInsertBytesAt(String* s, str bytes, u32 at);
 
 ///// OS-wrapped apis
 void      osInit();
diff --git a/string.c b/string.c
index 2f701e6..600b8b1 100644
--- a/string.c
+++ b/string.c
@@ -466,3 +466,18 @@ fn u32 stringLineStartByteOffset(String s, u32 line_number) {
   return s.length;
 }
 
+fn bool stringInsertBytesAt(String* s, str bytes, u32 at) {
+  u32 len = strlen(bytes);
+  if ((s->capacity - s->length) < len) {
+    return false;
+  }
+  for (u32 i = 0; i < len; i++) {
+    // move the original byte over by `len`
+    s->bytes[at + i + len] = s->bytes[at + i];
+    // copy the new byte in
+    s->bytes[at + i] = bytes[i];
+    s->length += 1;
+  }
+  return true;
+}
+