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309113c984
Taking a page from core git's strbuf, this introduces git_buf_initbuf which is an empty string that is used to initialize the git_buf ptr value even for new buffers. Now the git_buf ptr will always point to a valid NUL-terminated string. This change required jumping through a few hoops for git_buf_grow and git_buf_free to distinguish between a actual allocated buffer and the global initial value. Also, this moves the allocation related functions to be next to each other near the top of buffer.c.
53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
/*
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* Copyright (C) 2009-2011 the libgit2 contributors
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*
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* This file is part of libgit2, distributed under the GNU GPL v2 with
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* a Linking Exception. For full terms see the included COPYING file.
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*/
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#ifndef INCLUDE_buffer_h__
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#define INCLUDE_buffer_h__
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#include "common.h"
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typedef struct {
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char *ptr;
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ssize_t asize, size;
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} git_buf;
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extern char git_buf_initbuf[];
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#define GIT_BUF_INIT { git_buf_initbuf, 0, 0 }
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void git_buf_init(git_buf *buf, size_t initial_size);
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int git_buf_grow(git_buf *buf, size_t target_size);
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void git_buf_free(git_buf *buf);
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void git_buf_swap(git_buf *buf_a, git_buf *buf_b);
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/**
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* Any function that writes to a git_buf can fail due to memory allocation
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* issues. If one fails, the git_buf will be marked with an OOM error and
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* further calls to modify the buffer will fail. You just check
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* git_buf_oom() at the end of your sequence and it will be true if you ran
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* out of memory at any point with that buffer.
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*/
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int git_buf_oom(const git_buf *buf);
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void git_buf_set(git_buf *buf, const char *data, size_t len);
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void git_buf_sets(git_buf *buf, const char *string);
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void git_buf_putc(git_buf *buf, char c);
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void git_buf_put(git_buf *buf, const char *data, size_t len);
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void git_buf_puts(git_buf *buf, const char *string);
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void git_buf_printf(git_buf *buf, const char *format, ...) GIT_FORMAT_PRINTF(2, 3);
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void git_buf_clear(git_buf *buf);
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void git_buf_consume(git_buf *buf, const char *end);
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void git_buf_join_n(git_buf *buf, char separator, int nbuf, ...);
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void git_buf_join(git_buf *buf, char separator, const char *str_a, const char *str_b);
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const char *git_buf_cstr(git_buf *buf);
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char *git_buf_take_cstr(git_buf *buf);
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void git_buf_copy_cstr(char *data, size_t datasize, git_buf *buf);
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#define git_buf_PUTS(buf, str) git_buf_put(buf, str, sizeof(str) - 1)
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#endif
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