From 553b43d2e563dcff74d4c86904fa3737e96d7365 Mon Sep 17 00:00:00 2001
From: Anton Kling <anton@kling.gg>
Date: Tue, 19 Mar 2024 01:41:22 +0100
Subject: IRC: Add the IRC client I am working on

---
 userland/irc/sb.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 userland/irc/sb.c

(limited to 'userland/irc/sb.c')

diff --git a/userland/irc/sb.c b/userland/irc/sb.c
new file mode 100644
index 0000000..b8b8915
--- /dev/null
+++ b/userland/irc/sb.c
@@ -0,0 +1,59 @@
+#include "sb.h"
+#include <math.h>
+#include <stdlib.h>
+#include <string.h>
+
+void sb_init(struct sb *ctx) {
+  ctx->string = malloc(512);
+  ctx->length = 0;
+  ctx->capacity = 512;
+}
+
+void sb_free(struct sb *ctx) {
+  ctx->length = 0;
+  ctx->capacity = 0;
+  free(ctx->string);
+  ctx->string = NULL;
+}
+
+void sb_reset(struct sb *ctx) {
+  ctx->length = 0;
+}
+
+int sb_isempty(const struct sb *ctx) {
+  return (0 == ctx->length);
+}
+
+void sb_append_char(struct sb *ctx, char c) {
+  if (1 > ctx->capacity - ctx->length) {
+    ctx->capacity += 32;
+    ctx->string = realloc(ctx->string, ctx->capacity);
+  }
+  memcpy(ctx->string + ctx->length, &c, 1);
+  ctx->length++;
+}
+
+int sb_delete_right(struct sb *ctx, int n) {
+  n = min(n, ctx->length);
+  ctx->length -= n;
+  return n;
+}
+
+void sb_append(struct sb *ctx, const char *s) {
+  size_t l = strlen(s);
+  if (l > ctx->capacity - ctx->length) {
+    ctx->capacity += l;
+    ctx->string = realloc(ctx->string, ctx->capacity);
+  }
+  memcpy(ctx->string + ctx->length, s, l);
+  ctx->length += l;
+}
+
+void sb_append_sv(struct sb *ctx, struct sv sv) {
+  if (sv.length > ctx->capacity - ctx->length) {
+    ctx->capacity += sv.length;
+    ctx->string = realloc(ctx->string, ctx->capacity);
+  }
+  memcpy(ctx->string + ctx->length, sv.s, sv.length);
+  ctx->length += sv.length;
+}
-- 
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