diff options
Diffstat (limited to 'trailer.c')
| -rw-r--r-- | trailer.c | 194 |
1 files changed, 100 insertions, 94 deletions
@@ -102,12 +102,12 @@ static int same_trailer(struct trailer_item *a, struct arg_item *b) return same_token(a, b) && same_value(a, b); } -static inline int contains_only_spaces(const char *str) +static inline int is_blank_line(const char *str) { const char *s = str; - while (*s && isspace(*s)) + while (*s && *s != '\n' && isspace(*s)) s++; - return !*s; + return !*s || *s == '\n'; } static inline void strbuf_replace(struct strbuf *sb, const char *a, const char *b) @@ -702,51 +702,71 @@ static void process_command_line_args(struct list_head *arg_head, free(cl_separators); } -static struct strbuf **read_input_file(const char *file) +static void read_input_file(struct strbuf *sb, const char *file) { - struct strbuf **lines; - struct strbuf sb = STRBUF_INIT; - if (file) { - if (strbuf_read_file(&sb, file, 0) < 0) + if (strbuf_read_file(sb, file, 0) < 0) die_errno(_("could not read input file '%s'"), file); } else { - if (strbuf_read(&sb, fileno(stdin), 0) < 0) + if (strbuf_read(sb, fileno(stdin), 0) < 0) die_errno(_("could not read from stdin")); } +} - lines = strbuf_split(&sb, '\n'); +static const char *next_line(const char *str) +{ + const char *nl = strchrnul(str, '\n'); + return nl + !!*nl; +} - strbuf_release(&sb); +/* + * Return the position of the start of the last line. If len is 0, return -1. + */ +static int last_line(const char *buf, size_t len) +{ + int i; + if (len == 0) + return -1; + if (len == 1) + return 0; + /* + * Skip the last character (in addition to the null terminator), + * because if the last character is a newline, it is considered as part + * of the last line anyway. + */ + i = len - 2; - return lines; + for (; i >= 0; i--) { + if (buf[i] == '\n') + return i + 1; + } + return 0; } /* - * Return the (0 based) index of the start of the patch or the line - * count if there is no patch in the message. + * Return the position of the start of the patch or the length of str if there + * is no patch in the message. */ -static int find_patch_start(struct strbuf **lines, int count) +static int find_patch_start(const char *str) { - int i; + const char *s; - /* Get the start of the patch part if any */ - for (i = 0; i < count; i++) { - if (starts_with(lines[i]->buf, "---")) - return i; + for (s = str; *s; s = next_line(s)) { + if (starts_with(s, "---")) + return s - str; } - return count; + return s - str; } /* - * Return the (0 based) index of the first trailer line or count if - * there are no trailers. Trailers are searched only in the lines from - * index (count - 1) down to index 0. + * Return the position of the first trailer line or len if there are no + * trailers. */ -static int find_trailer_start(struct strbuf **lines, int count) +static int find_trailer_start(const char *buf, size_t len) { - int start, end_of_title, only_spaces = 1; + const char *s; + int end_of_title, l, only_spaces = 1; int recognized_prefix = 0, trailer_lines = 0, non_trailer_lines = 0; /* * Number of possible continuation lines encountered. This will be @@ -758,13 +778,13 @@ static int find_trailer_start(struct strbuf **lines, int count) int possible_continuation_lines = 0; /* The first paragraph is the title and cannot be trailers */ - for (start = 0; start < count; start++) { - if (lines[start]->buf[0] == comment_line_char) + for (s = buf; s < buf + len; s = next_line(s)) { + if (s[0] == comment_line_char) continue; - if (contains_only_spaces(lines[start]->buf)) + if (is_blank_line(s)) break; } - end_of_title = start; + end_of_title = s - buf; /* * Get the start of the trailers by looking starting from the end for a @@ -772,30 +792,33 @@ static int find_trailer_start(struct strbuf **lines, int count) * trailers, or (ii) contains at least one Git-generated trailer and * consists of at least 25% trailers. */ - for (start = count - 1; start >= end_of_title; start--) { + for (l = last_line(buf, len); + l >= end_of_title; + l = last_line(buf, l)) { + const char *bol = buf + l; const char **p; int separator_pos; - if (lines[start]->buf[0] == comment_line_char) { + if (bol[0] == comment_line_char) { non_trailer_lines += possible_continuation_lines; possible_continuation_lines = 0; continue; } - if (contains_only_spaces(lines[start]->buf)) { + if (is_blank_line(bol)) { if (only_spaces) continue; non_trailer_lines += possible_continuation_lines; if (recognized_prefix && trailer_lines * 3 >= non_trailer_lines) - return start + 1; - if (trailer_lines && !non_trailer_lines) - return start + 1; - return count; + return next_line(bol) - buf; + else if (trailer_lines && !non_trailer_lines) + return next_line(bol) - buf; + return len; } only_spaces = 0; for (p = git_generated_prefixes; *p; p++) { - if (starts_with(lines[start]->buf, *p)) { + if (starts_with(bol, *p)) { trailer_lines++; possible_continuation_lines = 0; recognized_prefix = 1; @@ -803,8 +826,8 @@ static int find_trailer_start(struct strbuf **lines, int count) } } - separator_pos = find_separator(lines[start]->buf, separators); - if (separator_pos >= 1 && !isspace(lines[start]->buf[0])) { + separator_pos = find_separator(bol, separators); + if (separator_pos >= 1 && !isspace(bol[0])) { struct list_head *pos; trailer_lines++; @@ -814,13 +837,13 @@ static int find_trailer_start(struct strbuf **lines, int count) list_for_each(pos, &conf_head) { struct arg_item *item; item = list_entry(pos, struct arg_item, list); - if (token_matches_item(lines[start]->buf, item, + if (token_matches_item(bol, item, separator_pos)) { recognized_prefix = 1; break; } } - } else if (isspace(lines[start]->buf[0])) + } else if (isspace(bol[0])) possible_continuation_lines++; else { non_trailer_lines++; @@ -831,88 +854,70 @@ continue_outer_loop: ; } - return count; -} - -/* Get the index of the end of the trailers */ -static int find_trailer_end(struct strbuf **lines, int patch_start) -{ - struct strbuf sb = STRBUF_INIT; - int i, ignore_bytes; - - for (i = 0; i < patch_start; i++) - strbuf_addbuf(&sb, lines[i]); - ignore_bytes = ignore_non_trailer(sb.buf, sb.len); - strbuf_release(&sb); - for (i = patch_start - 1; i >= 0 && ignore_bytes > 0; i--) - ignore_bytes -= lines[i]->len; - - return i + 1; + return len; } -static int has_blank_line_before(struct strbuf **lines, int start) +/* Return the position of the end of the trailers. */ +static int find_trailer_end(const char *buf, size_t len) { - for (;start >= 0; start--) { - if (lines[start]->buf[0] == comment_line_char) - continue; - return contains_only_spaces(lines[start]->buf); - } - return 0; + return len - ignore_non_trailer(buf, len); } -static void print_lines(FILE *outfile, struct strbuf **lines, int start, int end) +static int ends_with_blank_line(const char *buf, size_t len) { - int i; - for (i = start; lines[i] && i < end; i++) - fprintf(outfile, "%s", lines[i]->buf); + int ll = last_line(buf, len); + if (ll < 0) + return 0; + return is_blank_line(buf + ll); } static int process_input_file(FILE *outfile, - struct strbuf **lines, + const char *str, struct list_head *head) { - int count = 0; - int patch_start, trailer_start, trailer_end, i; + int patch_start, trailer_start, trailer_end; struct strbuf tok = STRBUF_INIT; struct strbuf val = STRBUF_INIT; struct trailer_item *last = NULL; + struct strbuf *trailer, **trailer_lines, **ptr; - /* Get the line count */ - while (lines[count]) - count++; - - patch_start = find_patch_start(lines, count); - trailer_end = find_trailer_end(lines, patch_start); - trailer_start = find_trailer_start(lines, trailer_end); + patch_start = find_patch_start(str); + trailer_end = find_trailer_end(str, patch_start); + trailer_start = find_trailer_start(str, trailer_end); /* Print lines before the trailers as is */ - print_lines(outfile, lines, 0, trailer_start); + fwrite(str, 1, trailer_start, outfile); - if (!has_blank_line_before(lines, trailer_start - 1)) + if (!ends_with_blank_line(str, trailer_start)) fprintf(outfile, "\n"); /* Parse trailer lines */ - for (i = trailer_start; i < trailer_end; i++) { + trailer_lines = strbuf_split_buf(str + trailer_start, + trailer_end - trailer_start, + '\n', + 0); + for (ptr = trailer_lines; *ptr; ptr++) { int separator_pos; - if (lines[i]->buf[0] == comment_line_char) + trailer = *ptr; + if (trailer->buf[0] == comment_line_char) continue; - if (last && isspace(lines[i]->buf[0])) { + if (last && isspace(trailer->buf[0])) { struct strbuf sb = STRBUF_INIT; - strbuf_addf(&sb, "%s\n%s", last->value, lines[i]->buf); + strbuf_addf(&sb, "%s\n%s", last->value, trailer->buf); strbuf_strip_suffix(&sb, "\n"); free(last->value); last->value = strbuf_detach(&sb, NULL); continue; } - separator_pos = find_separator(lines[i]->buf, separators); + separator_pos = find_separator(trailer->buf, separators); if (separator_pos >= 1) { - parse_trailer(&tok, &val, NULL, lines[i]->buf, + parse_trailer(&tok, &val, NULL, trailer->buf, separator_pos); last = add_trailer_item(head, strbuf_detach(&tok, NULL), strbuf_detach(&val, NULL)); } else { - strbuf_addbuf(&val, lines[i]); + strbuf_addbuf(&val, trailer); strbuf_strip_suffix(&val, "\n"); add_trailer_item(head, NULL, @@ -920,6 +925,7 @@ static int process_input_file(FILE *outfile, last = NULL; } } + strbuf_list_free(trailer_lines); return trailer_end; } @@ -968,7 +974,7 @@ void process_trailers(const char *file, int in_place, int trim_empty, struct str { LIST_HEAD(head); LIST_HEAD(arg_head); - struct strbuf **lines; + struct strbuf sb = STRBUF_INIT; int trailer_end; FILE *outfile = stdout; @@ -976,13 +982,13 @@ void process_trailers(const char *file, int in_place, int trim_empty, struct str git_config(git_trailer_default_config, NULL); git_config(git_trailer_config, NULL); - lines = read_input_file(file); + read_input_file(&sb, file); if (in_place) outfile = create_in_place_tempfile(file); /* Print the lines before the trailers */ - trailer_end = process_input_file(outfile, lines, &head); + trailer_end = process_input_file(outfile, sb.buf, &head); process_command_line_args(&arg_head, trailers); @@ -993,11 +999,11 @@ void process_trailers(const char *file, int in_place, int trim_empty, struct str free_all(&head); /* Print the lines after the trailers as is */ - print_lines(outfile, lines, trailer_end, INT_MAX); + fwrite(sb.buf + trailer_end, 1, sb.len - trailer_end, outfile); if (in_place) if (rename_tempfile(&trailers_tempfile, file)) die_errno(_("could not rename temporary file to %s"), file); - strbuf_list_free(lines); + strbuf_release(&sb); } |