83 lines
1.8 KiB
C++
83 lines
1.8 KiB
C++
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/*
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* Copyright (c) 2015 Andrew Kelley
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*
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* This file is part of zig, which is MIT licensed.
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* See http://opensource.org/licenses/MIT
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*/
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#ifndef ZIG_BUFFER_HPP
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#define ZIG_BUFFER_HPP
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#include "list.hpp"
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#include <assert.h>
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struct Buf {
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ZigList<char> list;
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};
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static inline int buf_len(Buf *buf) {
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return buf->list.length - 1;
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}
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static inline char *buf_ptr(Buf *buf) {
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return buf->list.items;
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}
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static inline void buf_resize(Buf *buf, int new_len) {
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buf->list.resize(new_len + 1);
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buf->list.at(buf_len(buf)) = 0;
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}
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static inline Buf *buf_alloc(void) {
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Buf *buf = allocate<Buf>(1);
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buf_resize(buf, 0);
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return buf;
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}
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static inline Buf *buf_alloc_fixed(int size) {
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Buf *buf = allocate<Buf>(1);
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buf_resize(buf, size);
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return buf;
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}
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static inline void buf_deinit(Buf *buf) {
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buf->list.deinit();
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}
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static inline Buf *buf_from_mem(char *ptr, int len) {
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Buf *buf = allocate<Buf>(1);
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buf->list.resize(len + 1);
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memcpy(buf_ptr(buf), ptr, len);
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buf->list.at(buf_len(buf)) = 0;
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return buf;
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}
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static inline Buf *buf_slice(Buf *in_buf, int start, int end) {
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assert(start >= 0);
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assert(end >= 0);
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assert(start < buf_len(in_buf));
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assert(end <= buf_len(in_buf));
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Buf *out_buf = allocate<Buf>(1);
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out_buf->list.resize(end - start + 1);
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memcpy(buf_ptr(out_buf), buf_ptr(in_buf) + start, end - start);
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out_buf->list.at(buf_len(out_buf)) = 0;
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return out_buf;
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}
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static inline void buf_append_str(Buf *buf, const char *str, int str_len) {
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if (str_len == -1)
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str_len = strlen(str);
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int old_len = buf_len(buf);
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buf_resize(buf, old_len + str_len);
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memcpy(buf_ptr(buf) + old_len, str, str_len);
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buf->list.at(buf_len(buf)) = 0;
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}
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static inline void buf_append_buf(Buf *buf, Buf *append_buf) {
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buf_append_str(buf, buf_ptr(append_buf), buf_len(append_buf));
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}
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#endif
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