diff options
Diffstat (limited to 'diff.c')
| -rw-r--r-- | diff.c | 155 |
1 files changed, 113 insertions, 42 deletions
@@ -532,8 +532,12 @@ static void diff_words_show(struct diff_words_data *diff_words) typedef unsigned long (*sane_truncate_fn)(char *line, unsigned long len); struct emit_callback { - int nparents, color_diff; + int color_diff; unsigned ws_rule; + int blank_at_eof_in_preimage; + int blank_at_eof_in_postimage; + int lno_in_preimage; + int lno_in_postimage; sane_truncate_fn truncate; const char **label_path; struct diff_words_data *diff_words; @@ -586,6 +590,17 @@ static void emit_line(FILE *file, const char *set, const char *reset, const char fputc('\n', file); } +static int new_blank_line_at_eof(struct emit_callback *ecbdata, const char *line, int len) +{ + if (!((ecbdata->ws_rule & WS_BLANK_AT_EOF) && + ecbdata->blank_at_eof_in_preimage && + ecbdata->blank_at_eof_in_postimage && + ecbdata->blank_at_eof_in_preimage <= ecbdata->lno_in_preimage && + ecbdata->blank_at_eof_in_postimage <= ecbdata->lno_in_postimage)) + return 0; + return ws_blank_line(line + 1, len - 1, ecbdata->ws_rule); +} + static void emit_add_line(const char *reset, struct emit_callback *ecbdata, const char *line, int len) { const char *ws = diff_get_color(ecbdata->color_diff, DIFF_WHITESPACE); @@ -593,11 +608,13 @@ static void emit_add_line(const char *reset, struct emit_callback *ecbdata, cons if (!*ws) emit_line(ecbdata->file, set, reset, line, len); + else if (new_blank_line_at_eof(ecbdata, line, len)) + /* Blank line at EOF - paint '+' as well */ + emit_line(ecbdata->file, ws, reset, line, len); else { /* Emit just the prefix, then the rest. */ - emit_line(ecbdata->file, set, reset, line, ecbdata->nparents); - ws_check_emit(line + ecbdata->nparents, - len - ecbdata->nparents, ecbdata->ws_rule, + emit_line(ecbdata->file, set, reset, line, 1); + ws_check_emit(line + 1, len - 1, ecbdata->ws_rule, ecbdata->file, set, reset, ws); } } @@ -620,10 +637,23 @@ static unsigned long sane_truncate_line(struct emit_callback *ecb, char *line, u return allot - l; } +static void find_lno(const char *line, struct emit_callback *ecbdata) +{ + const char *p; + ecbdata->lno_in_preimage = 0; + ecbdata->lno_in_postimage = 0; + p = strchr(line, '-'); + if (!p) + return; /* cannot happen */ + ecbdata->lno_in_preimage = strtol(p + 1, NULL, 10); + p = strchr(p, '+'); + if (!p) + return; /* cannot happen */ + ecbdata->lno_in_postimage = strtol(p + 1, NULL, 10); +} + static void fn_out_consume(void *priv, char *line, unsigned long len) { - int i; - int color; struct emit_callback *ecbdata = priv; const char *meta = diff_get_color(ecbdata->color_diff, DIFF_METAINFO); const char *plain = diff_get_color(ecbdata->color_diff, DIFF_PLAIN); @@ -650,14 +680,9 @@ static void fn_out_consume(void *priv, char *line, unsigned long len) len = 1; } - /* This is not really necessary for now because - * this codepath only deals with two-way diffs. - */ - for (i = 0; i < len && line[i] == '@'; i++) - ; - if (2 <= i && i < len && line[i] == ' ') { - ecbdata->nparents = i - 1; + if (line[0] == '@') { len = sane_truncate_line(ecbdata, line, len); + find_lno(line, ecbdata); emit_line(ecbdata->file, diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO), reset, line, len); @@ -666,15 +691,11 @@ static void fn_out_consume(void *priv, char *line, unsigned long len) return; } - if (len < ecbdata->nparents) { + if (len < 1) { emit_line(ecbdata->file, reset, reset, line, len); return; } - color = DIFF_PLAIN; - if (ecbdata->diff_words && ecbdata->nparents != 1) - /* fall back to normal diff */ - free_diff_words_data(ecbdata); if (ecbdata->diff_words) { if (line[0] == '-') { diff_words_append(line, len, @@ -693,20 +714,19 @@ static void fn_out_consume(void *priv, char *line, unsigned long len) emit_line(ecbdata->file, plain, reset, line, len); return; } - for (i = 0; i < ecbdata->nparents && len; i++) { - if (line[i] == '-') - color = DIFF_FILE_OLD; - else if (line[i] == '+') - color = DIFF_FILE_NEW; - } - if (color != DIFF_FILE_NEW) { - emit_line(ecbdata->file, - diff_get_color(ecbdata->color_diff, color), - reset, line, len); - return; + if (line[0] != '+') { + const char *color = + diff_get_color(ecbdata->color_diff, + line[0] == '-' ? DIFF_FILE_OLD : DIFF_PLAIN); + ecbdata->lno_in_preimage++; + if (line[0] == ' ') + ecbdata->lno_in_postimage++; + emit_line(ecbdata->file, color, reset, line, len); + } else { + ecbdata->lno_in_postimage++; + emit_add_line(reset, ecbdata, line, len); } - emit_add_line(reset, ecbdata, line, len); } static char *pprint_rename(const char *a, const char *b) @@ -1211,7 +1231,6 @@ struct checkdiff_t { struct diff_options *o; unsigned ws_rule; unsigned status; - int trailing_blanks_start; }; static int is_conflict_marker(const char *line, unsigned long len) @@ -1255,10 +1274,6 @@ static void checkdiff_consume(void *priv, char *line, unsigned long len) if (line[0] == '+') { unsigned bad; data->lineno++; - if (!ws_blank_line(line + 1, len - 1, data->ws_rule)) - data->trailing_blanks_start = 0; - else if (!data->trailing_blanks_start) - data->trailing_blanks_start = data->lineno; if (is_conflict_marker(line + 1, len - 1)) { data->status |= 1; fprintf(data->o->file, @@ -1278,14 +1293,12 @@ static void checkdiff_consume(void *priv, char *line, unsigned long len) data->o->file, set, reset, ws); } else if (line[0] == ' ') { data->lineno++; - data->trailing_blanks_start = 0; } else if (line[0] == '@') { char *plus = strchr(line, '+'); if (plus) data->lineno = strtol(plus, NULL, 10) - 1; else die("invalid diff"); - data->trailing_blanks_start = 0; } } @@ -1437,6 +1450,51 @@ static const char *get_textconv(struct diff_filespec *one) return one->driver->textconv; } +static int count_trailing_blank(mmfile_t *mf, unsigned ws_rule) +{ + char *ptr = mf->ptr; + long size = mf->size; + int cnt = 0; + + if (!size) + return cnt; + ptr += size - 1; /* pointing at the very end */ + if (*ptr != '\n') + ; /* incomplete line */ + else + ptr--; /* skip the last LF */ + while (mf->ptr < ptr) { + char *prev_eol; + for (prev_eol = ptr; mf->ptr <= prev_eol; prev_eol--) + if (*prev_eol == '\n') + break; + if (!ws_blank_line(prev_eol + 1, ptr - prev_eol, ws_rule)) + break; + cnt++; + ptr = prev_eol - 1; + } + return cnt; +} + +static void check_blank_at_eof(mmfile_t *mf1, mmfile_t *mf2, + struct emit_callback *ecbdata) +{ + int l1, l2, at; + unsigned ws_rule = ecbdata->ws_rule; + l1 = count_trailing_blank(mf1, ws_rule); + l2 = count_trailing_blank(mf2, ws_rule); + if (l2 <= l1) { + ecbdata->blank_at_eof_in_preimage = 0; + ecbdata->blank_at_eof_in_postimage = 0; + return; + } + at = count_lines(mf1->ptr, mf1->size); + ecbdata->blank_at_eof_in_preimage = (at - l1) + 1; + + at = count_lines(mf2->ptr, mf2->size); + ecbdata->blank_at_eof_in_postimage = (at - l2) + 1; +} + static void builtin_diff(const char *name_a, const char *name_b, struct diff_filespec *one, @@ -1562,6 +1620,8 @@ static void builtin_diff(const char *name_a, ecbdata.color_diff = DIFF_OPT_TST(o, COLOR_DIFF); ecbdata.found_changesp = &o->found_changes; ecbdata.ws_rule = whitespace_rule(name_b ? name_b : name_a); + if (ecbdata.ws_rule & WS_BLANK_AT_EOF) + check_blank_at_eof(&mf1, &mf2, &ecbdata); ecbdata.file = o->file; xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts; xecfg.ctxlen = o->context; @@ -1704,11 +1764,22 @@ static void builtin_checkdiff(const char *name_a, const char *name_b, xdi_diff_outf(&mf1, &mf2, checkdiff_consume, &data, &xpp, &xecfg, &ecb); - if ((data.ws_rule & WS_TRAILING_SPACE) && - data.trailing_blanks_start) { - fprintf(o->file, "%s:%d: ends with blank lines.\n", - data.filename, data.trailing_blanks_start); - data.status = 1; /* report errors */ + if (data.ws_rule & WS_BLANK_AT_EOF) { + struct emit_callback ecbdata; + int blank_at_eof; + + ecbdata.ws_rule = data.ws_rule; + check_blank_at_eof(&mf1, &mf2, &ecbdata); + blank_at_eof = ecbdata.blank_at_eof_in_preimage; + + if (blank_at_eof) { + static char *err; + if (!err) + err = whitespace_error_string(WS_BLANK_AT_EOF); + fprintf(o->file, "%s:%d: %s.\n", + data.filename, blank_at_eof, err); + data.status = 1; /* report errors */ + } } } free_and_return: |