From 0b825562a1da4930973f5e6065e46f77a7d144ce Mon Sep 17 00:00:00 2001
From: Curtis McEnroe <june@causal.agency>
Date: Tue, 20 Nov 2018 18:36:45 -0500
Subject: Add bufferDelete
---
bin/edi/buffer.c | 16 ++++++++++++++++
bin/edi/edi.h | 1 +
2 files changed, 17 insertions(+)
diff --git a/bin/edi/buffer.c b/bin/edi/buffer.c
index e9422951..62f55bee 100644
--- a/bin/edi/buffer.c
+++ b/bin/edi/buffer.c
@@ -66,6 +66,12 @@ void bufferAppend(struct Buffer *buf, wchar_t ch) {
buf->slice.len++;
}
+void bufferDelete(struct Buffer *buf) {
+ if (!buf->slice.len) return;
+ buf->slice.len--;
+ buf->len--;
+}
+
wchar_t *bufferDest(struct Buffer *buf, size_t len) {
if (buf->len + len > buf->cap) {
while (len > buf->cap) buf->cap *= 2;
@@ -115,6 +121,16 @@ int main() {
assert(!wcsncmp(L"ABCDEF", buf.slice.ptr, buf.slice.len));
bufferFree(&buf);
+ buf = bufferAlloc(4);
+ bufferInsert(&buf);
+ bufferAppend(&buf, L'A');
+ bufferAppend(&buf, L'B');
+ bufferDelete(&buf);
+ assert(!wcsncmp(L"A", buf.slice.ptr, buf.slice.len));
+ bufferAppend(&buf, L'C');
+ assert(!wcsncmp(L"AC", buf.slice.ptr, buf.slice.len));
+ bufferFree(&buf);
+
buf = bufferAlloc(4);
wchar_t *dest = bufferDest(&buf, 2);
diff --git a/bin/edi/edi.h b/bin/edi/edi.h
index 9b300739..4e127b94 100644
--- a/bin/edi/edi.h
+++ b/bin/edi/edi.h
@@ -44,6 +44,7 @@ struct Buffer bufferAlloc(size_t cap);
void bufferFree(struct Buffer *buf);
void bufferInsert(struct Buffer *buf);
void bufferAppend(struct Buffer *buf, wchar_t ch);
+void bufferDelete(struct Buffer *buf);
wchar_t *bufferDest(struct Buffer *buf, size_t len);
struct Table {
--
cgit 1.4.1