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/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#ifndef INCLUDE_buf_text_h__
#define INCLUDE_buf_text_h__
#include "buffer.h"
typedef enum {
GIT_BOM_NONE = 0,
GIT_BOM_UTF8 = 1,
GIT_BOM_UTF16_LE = 2,
GIT_BOM_UTF16_BE = 3,
GIT_BOM_UTF32_LE = 4,
GIT_BOM_UTF32_BE = 5
} git_bom_t;
typedef struct {
git_bom_t bom; /* BOM found at head of text */
unsigned int nul, cr, lf, crlf; /* NUL, CR, LF and CRLF counts */
unsigned int printable, nonprintable; /* These are just approximations! */
} git_buf_text_stats;
/**
* Append string to buffer, prefixing each character from `esc_chars` with
* `esc_with` string.
*
* @param buf Buffer to append data to
* @param string String to escape and append
* @param esc_chars Characters to be escaped
* @param esc_with String to insert in from of each found character
* @return 0 on success, <0 on failure (probably allocation problem)
*/
extern int git_buf_text_puts_escaped(
git_buf *buf,
const char *string,
const char *esc_chars,
const char *esc_with);
/**
* Append string escaping characters that are regex special
*/
GIT_INLINE(int) git_buf_text_puts_escape_regex(git_buf *buf, const char *string)
{
return git_buf_text_puts_escaped(buf, string, "^.[]$()|*+?{}\\", "\\");
}
/**
* Unescape all characters in a buffer in place
*
* I.e. remove backslashes
*/
extern void git_buf_text_unescape(git_buf *buf);
/**
* Fill buffer with the common prefix of a array of strings
*
* Buffer will be set to empty if there is no common prefix
*/
extern int git_buf_text_common_prefix(git_buf *buf, const git_strarray *strs);
/**
* Check quickly if buffer looks like it contains binary data
*
* @param buf Buffer to check
* @return true if buffer looks like non-text data
*/
extern bool git_buf_text_is_binary(const git_buf *buf);
/**
* Check quickly if buffer contains a NUL byte
*
* @param buf Buffer to check
* @return true if buffer contains a NUL byte
*/
extern bool git_buf_text_contains_nul(const git_buf *buf);
/**
* Check if a buffer begins with a UTF BOM
*
* @param bom Set to the type of BOM detected or GIT_BOM_NONE
* @param buf Buffer in which to check the first bytes for a BOM
* @param offset Offset into buffer to look for BOM
* @return Number of bytes of BOM data (or 0 if no BOM found)
*/
extern int git_buf_text_detect_bom(
git_bom_t *bom, const git_buf *buf, size_t offset);
/**
* Gather stats for a piece of text
*
* Fill the `stats` structure with counts of unreadable characters, carriage
* returns, etc, so it can be used in heuristics. This automatically skips
* a trailing EOF (\032 character). Also it will look for a BOM at the
* start of the text and can be told to skip that as well.
*
* @param stats Structure to be filled in
* @param buf Text to process
* @param skip_bom Exclude leading BOM from stats if true
* @return Does the buffer heuristically look like binary data
*/
extern bool git_buf_text_gather_stats(
git_buf_text_stats *stats, const git_buf *buf, bool skip_bom);
#endif
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