| /* |
| * 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; |
| } |