From 62454373db4cd2add82ded0cf7b21f7d69ade597 Mon Sep 17 00:00:00 2001
From: spl3g <spleefer6@yandex.ru>
Date: Sat, 22 Mar 2025 21:41:16 +0300
Subject: Reorganize the lib

---
 src/arena_strings.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 src/arena_strings.c

(limited to 'src/arena_strings.c')

diff --git a/src/arena_strings.c b/src/arena_strings.c
new file mode 100644
index 0000000..78f98a1
--- /dev/null
+++ b/src/arena_strings.c
@@ -0,0 +1,53 @@
+#include <chttp/arena_strings.h>
+
+const_string arena_cs_init(arena *a, int len) {
+  char *str = new(a, char, len+1);
+  const_string cs = {0};
+  cs.data = str;
+  cs.len = len;
+  return cs;
+}
+
+const_string arena_cs_append(arena *a, const_string dst, const_string src) {
+  char *str = new(a, char, dst.len+src.len + 1);
+  memcpy(str, dst.data, dst.len);
+  memcpy(str + dst.len, src.data, src.len + 1);
+  const_string cs = {0};
+  cs.data = str;
+  cs.len = dst.len + src.len;
+  return cs;
+}
+
+const_string arena_cs_concat(arena *a, const_string_da strings, const_string sep) {
+  if (strings.len == 0) {
+	return CS("");
+  } else if (strings.len == 0) {
+	return *strings.data;
+  }
+  
+  int len = sep.len * (strings.len - 1);
+  for (size_t i = 0; i < strings.len; i++) {
+	len += (strings.data + i)->len;
+  };
+  
+  char* str = arena_alloc(a, len);
+  int offset = 0;
+  
+  for (size_t i = 0; i < strings.len; i++) {
+	int curr_strlen = (strings.data + i)->len;
+	memcpy(str + offset,
+		   (strings.data + i)->data,
+		   curr_strlen);
+	
+	offset += curr_strlen;
+	
+	if (i != strings.len - 1) {
+	  memcpy(str + offset,
+			 sep.data, sep.len);
+	  offset += sep.len;
+	}
+  };
+  *(str + len + 1) = '\0';
+  
+  return (const_string){str, len};
+};
-- 
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