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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.
*/
#include "message.h"
static size_t line_length_without_trailing_spaces(const char *line, size_t len)
{
while (len) {
unsigned char c = line[len - 1];
if (!git__isspace(c))
break;
len--;
}
return len;
}
/* Greatly inspired from git.git "stripspace" */
/* see https://github.com/git/git/blob/497215d8811ac7b8955693ceaad0899ecd894ed2/builtin/stripspace.c#L4-67 */
int git_message__prettify(git_buf *message_out, const char *message, int strip_comments)
{
const size_t message_len = strlen(message);
int consecutive_empty_lines = 0;
size_t i, line_length, rtrimmed_line_length;
char *next_newline;
for (i = 0; i < strlen(message); i += line_length) {
next_newline = memchr(message + i, '\n', message_len - i);
if (next_newline != NULL) {
line_length = next_newline - (message + i) + 1;
} else {
line_length = message_len - i;
}
if (strip_comments && line_length && message[i] == '#')
continue;
rtrimmed_line_length = line_length_without_trailing_spaces(message + i, line_length);
if (!rtrimmed_line_length) {
consecutive_empty_lines++;
continue;
}
if (consecutive_empty_lines > 0 && message_out->size > 0)
git_buf_putc(message_out, '\n');
consecutive_empty_lines = 0;
git_buf_put(message_out, message + i, rtrimmed_line_length);
git_buf_putc(message_out, '\n');
}
return git_buf_oom(message_out) ? -1 : 0;
}
int git_message_prettify(char *message_out, size_t buffer_size, const char *message, int strip_comments)
{
git_buf buf = GIT_BUF_INIT;
ssize_t out_size = -1;
if (message_out && buffer_size)
*message_out = '\0';
if (git_message__prettify(&buf, message, strip_comments) < 0)
goto done;
if (message_out && buf.size + 1 > buffer_size) { /* +1 for NUL byte */
giterr_set(GITERR_INVALID, "Buffer too short to hold the cleaned message");
goto done;
}
if (message_out)
git_buf_copy_cstr(message_out, buffer_size, &buf);
out_size = buf.size + 1;
done:
git_buf_free(&buf);
return (int)out_size;
}
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