From 43ce80e76484b7f33ed1259f64cd8d35bcc7ae74 Mon Sep 17 00:00:00 2001
From: kamkow1 <kamkow256@gmail.com>
Date: Sun, 8 Mar 2026 21:03:54 +0100
Subject: [PATCH] CE split lines properly

---
 ce/edit.c          | 11 +++++++----
 ce/edit.h          |  4 +++-
 ce/interp.c        |  2 +-
 libstring/string.c | 42 ++++++++++++++++++++++++++++++++++++++++++
 libstring/string.h |  8 ++++++--
 5 files changed, 59 insertions(+), 8 deletions(-)

diff --git a/ce/edit.c b/ce/edit.c
index d2457f3..cf89bf1 100644
--- a/ce/edit.c
+++ b/ce/edit.c
@@ -72,7 +72,8 @@ static bool prepare_lines_cb (void* ctx, const char* start, size_t len) {
     return false;
 
   memset (line, 0, sizeof (*line));
-  gapbuffer_init (&wmalloc, NULL, &line->gb, len);
+  size_t init_len = len > 0 ? len : 32;
+  gapbuffer_init (&wmalloc, NULL, &line->gb, init_len);
 
   for (size_t chr = 0; chr < len; chr++)
     gapbuffer_insert (&wrealloc, NULL, &line->gb, start[chr]);
@@ -87,7 +88,9 @@ static bool prepare_lines_cb (void* ctx, const char* start, size_t len) {
   return true;
 }
 
-static void prepare_lines (const char* text) { strtokenize (text, '\n', NULL, &prepare_lines_cb); }
+static void prepare_lines (const char* text, size_t len) {
+  str_split_lines (text, len, NULL, &prepare_lines_cb);
+}
 
 static void update_horz_scroll (size_t screen_cols) {
   if (editor.cursor.col < editor.col_offset)
@@ -118,10 +121,10 @@ static size_t count_digits (size_t n) {
   return count;
 }
 
-void edit_start (const char* file_path, const char* text) {
+void edit_start (const char* file_path, const char* text, size_t text_len) {
   mprintf (ANSIQ_SCR_SAVE);
 
-  prepare_lines (text);
+  prepare_lines (text, text_len);
   struct arena temp_arena;
   memset (&temp_arena, 0, sizeof (temp_arena));
   size_t cols, rows;
diff --git a/ce/edit.h b/ce/edit.h
index 15df3ce..ff6ade8 100644
--- a/ce/edit.h
+++ b/ce/edit.h
@@ -1,6 +1,8 @@
 #ifndef _EDIT_H
 #define _EDIT_H
 
-void edit_start (const char* path, const char* text);
+#include <stddef.h>
+
+void edit_start (const char* path, const char* text, size_t text_len);
 
 #endif // _EDIT_H
diff --git a/ce/interp.c b/ce/interp.c
index a899a90..5834bbb 100644
--- a/ce/interp.c
+++ b/ce/interp.c
@@ -265,7 +265,7 @@ static void edit (struct context* context, const char* path_string) {
     return;
   }
 
-  edit_start (path_string, str);
+  edit_start (path_string, str, desc.size);
 
   volume_close ();
 }
diff --git a/libstring/string.c b/libstring/string.c
index be49330..ccca77f 100644
--- a/libstring/string.c
+++ b/libstring/string.c
@@ -68,6 +68,48 @@ void strtokenize (const char* str, char delim, void* ctx, strtokenize_cb_func_t
   }
 }
 
+void str_split_lines (const char* str, size_t total_len, void* ctx, strtokenize_cb_func_t cb) {
+  if (str == NULL)
+    return;
+
+  const char* start = str;
+  const char* end;
+  size_t remaining = total_len;
+
+  while (remaining > 0) {
+    end = memchr (start, '\n', remaining);
+
+    if (end != NULL) {
+      size_t line_len = (size_t)(end - start);
+
+      if (!cb (ctx, start, line_len))
+        return;
+
+      start = end + 1;
+      remaining = total_len - (size_t)(start - str);
+
+      if (remaining == 0)
+        cb (ctx, start, 0);
+    } else {
+      cb (ctx, start, remaining);
+      break;
+    }
+  }
+}
+
+/* https://svnweb.freebsd.org/base/stable/7/lib/libc/string/memchr.c?view=markup */
+void* memchr (const void* s, unsigned char c, size_t n) {
+  if (n != 0) {
+    const unsigned char* p = s;
+    do {
+      if (*p++ == c)
+        return ((void*)(p - 1));
+    } while (--n != 0);
+  }
+
+  return NULL;
+}
+
 /* https://stackoverflow.com/a/34873406 */
 int strcmp (const char* s1, const char* s2) {
   while (*s1 && (*s1 == *s2)) {
diff --git a/libstring/string.h b/libstring/string.h
index ca1537c..cd3f702 100644
--- a/libstring/string.h
+++ b/libstring/string.h
@@ -33,6 +33,12 @@ char* strcat (char* dest, const char* src);
 
 char* strncat (char* dest, const char* src, size_t n);
 
+void* memmove (void* dest, const void* src, unsigned int n);
+
+void* memchr (const void* s, unsigned char c, size_t n);
+
+void str_split_lines (const char* str, size_t total_len, void* ctx, strtokenize_cb_func_t cb);
+
 int isalnum (int c);
 
 int isalpha (int c);
@@ -59,6 +65,4 @@ int isascii (int c);
 
 int isblank (int c);
 
-void* memmove (void* dest, const void* src, unsigned int n);
-
 #endif // _LIBSTRING_STRING_H