diff options
Diffstat (limited to 'diff.c')
| -rw-r--r-- | diff.c | 74 |
1 files changed, 53 insertions, 21 deletions
@@ -491,8 +491,10 @@ struct emit_callback { struct xdiff_emit_state xm; int color_diff; unsigned ws_rule; - int blank_at_eof; + 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; @@ -542,6 +544,17 @@ 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); @@ -549,11 +562,8 @@ 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 ((ecbdata->ws_rule & WS_BLANK_AT_EOF) && - ecbdata->blank_at_eof && - (ecbdata->blank_at_eof <= ecbdata->lno_in_preimage) && - ws_blank_line(line + 1, len - 1, ecbdata->ws_rule)) - /* Blank line at EOF */ + 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. */ @@ -581,12 +591,19 @@ static unsigned long sane_truncate_line(struct emit_callback *ecb, char *line, u return allot - l; } -static int find_preimage_lno(const char *line) +static void find_lno(const char *line, struct emit_callback *ecbdata) { - char *p = strchr(line, '-'); + const char *p; + ecbdata->lno_in_preimage = 0; + ecbdata->lno_in_postimage = 0; + p = strchr(line, '-'); if (!p) - return 0; /* should not happen */ - return strtol(p+1, NULL, 10); + 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) @@ -613,7 +630,7 @@ static void fn_out_consume(void *priv, char *line, unsigned long len) if (line[0] == '@') { len = sane_truncate_line(ecbdata, line, len); - ecbdata->lno_in_preimage = find_preimage_lno(line); + find_lno(line, ecbdata); emit_line(ecbdata->file, diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO), reset, line, len); @@ -651,10 +668,13 @@ static void fn_out_consume(void *priv, char *line, unsigned long len) 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); - return; + } 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) @@ -1470,16 +1490,23 @@ static int count_trailing_blank(mmfile_t *mf, unsigned ws_rule) return cnt; } -static int adds_blank_at_eof(mmfile_t *mf1, mmfile_t *mf2, unsigned ws_rule) +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) - return 0; - /* starting where? */ + 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); - return (at - l1) + 1; /* the line number counts from 1 */ + 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, @@ -1572,8 +1599,7 @@ static void builtin_diff(const char *name_a, 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) - ecbdata.blank_at_eof = - adds_blank_at_eof(&mf1, &mf2, ecbdata.ws_rule); + check_blank_at_eof(&mf1, &mf2, &ecbdata); ecbdata.file = o->file; xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts; xecfg.ctxlen = o->context; @@ -1699,7 +1725,13 @@ static void builtin_checkdiff(const char *name_a, const char *name_b, xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); if (data.ws_rule & WS_BLANK_AT_EOF) { - int blank_at_eof = adds_blank_at_eof(&mf1, &mf2, data.ws_rule); + 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) |