[PATCH 1/6 rebase-version] Add a prefix output callback to diff output.
- From
Bo Yang <struggleyb.nku@gmail.com>
- Date
- May 25, 2010, 09:02 UTC
- Message-ID
- <1274778154-29976-2-git-send-email-struggleyb.nku@gmail.com>
- In-Reply-To
- <1274778154-29976-1-git-send-email-struggleyb.nku@gmail.com>
The callback allow to output some prefix string for each line of diff output.
Signed-off-by: Bo Yang <struggleyb.nku@gmail.com> --- diff.c | 62 +++++++++++++++++++++++++++++++++++--------------------------- diff.h | 5 +++++ 2 files changed, 40 insertions(+), 27 deletions(-)
diff --git a/diff.c b/diff.c index 494f560..e2f910a 100644 --- a/diff.c +++ b/diff.c @@ -194,8 +194,8 @@ struct emit_callback { sane_truncate_fn truncate; const char **label_path; struct diff_words_data *diff_words; + struct diff_options *opt; int *found_changesp; - FILE *file; struct strbuf *header; }; @@ -282,11 +282,19 @@ static void check_blank_at_eof(mmfile_t *mf1, mmfile_t *mf2, ecbdata->blank_at_eof_in_postimage = (at - l2) + 1; } -static void emit_line_0(FILE *file, const char *set, const char *reset, +static void emit_line_0(struct diff_options *o, const char *set, const char *reset, int first, const char *line, int len) { int has_trailing_newline, has_trailing_carriage_return; int nofirst; + FILE *file = o->file; + + if (o->output_prefix) { + struct strbuf *msg = NULL; + msg = o->output_prefix(o, o->output_prefix_data); + assert(msg); + fwrite(msg->buf, msg->len, 1, file); + } if (len == 0) { has_trailing_newline = (first == '\n'); @@ -316,10 +324,10 @@ static void emit_line_0(FILE *file, const char *set, const char *reset, fputc('\n', file); } -static void emit_line(FILE *file, const char *set, const char *reset, +static void emit_line(struct diff_options *o, const char *set, const char *reset, const char *line, int len) { - emit_line_0(file, set, reset, line[0], line+1, len-1); + emit_line_0(o, set, reset, line[0], line+1, len-1); } static int new_blank_line_at_eof(struct emit_callback *ecbdata, const char *line, int len) @@ -341,15 +349,15 @@ static void emit_add_line(const char *reset, const char *set = diff_get_color(ecbdata->color_diff, DIFF_FILE_NEW); if (!*ws) - emit_line_0(ecbdata->file, set, reset, '+', line, len); + emit_line_0(ecbdata->opt, set, reset, '+', line, len); else if (new_blank_line_at_eof(ecbdata, line, len)) /* Blank line at EOF - paint '+' as well */ - emit_line_0(ecbdata->file, ws, reset, '+', line, len); + emit_line_0(ecbdata->opt, ws, reset, '+', line, len); else { /* Emit just the prefix, then the rest. */ - emit_line_0(ecbdata->file, set, reset, '+', "", 0); + emit_line_0(ecbdata->opt, set, reset, '+', "", 0); ws_check_emit(line, len, ecbdata->ws_rule, - ecbdata->file, set, reset, ws); + ecbdata->opt->file, set, reset, ws); } } @@ -370,23 +378,23 @@ static void emit_hunk_header(struct emit_callback *ecbdata, if (len < 10 || memcmp(line, atat, 2) || !(ep = memmem(line + 2, len - 2, atat, 2))) { - emit_line(ecbdata->file, plain, reset, line, len); + emit_line(ecbdata->opt, plain, reset, line, len); return; } ep += 2; /* skip over @@ */ /* The hunk header in fraginfo color */ - emit_line(ecbdata->file, frag, reset, line, ep - line); + emit_line(ecbdata->opt, frag, reset, line, ep - line); /* blank before the func header */ for (cp = ep; ep - line < len; ep++) if (*ep != ' ' && *ep != '\t') break; if (ep != cp) - emit_line(ecbdata->file, plain, reset, cp, ep - cp); + emit_line(ecbdata->opt, plain, reset, cp, ep - cp); if (ep < line + len) - emit_line(ecbdata->file, func, reset, ep, line + len - ep); + emit_line(ecbdata->opt, func, reset, ep, line + len - ep); } static struct diff_tempfile *claim_diff_tempfile(void) { @@ -446,7 +454,7 @@ static void emit_rewrite_lines(struct emit_callback *ecb, len = endp ? (endp - data + 1) : size; if (prefix != '+') { ecb->lno_in_preimage++; - emit_line_0(ecb->file, old, reset, '-', + emit_line_0(ecb->opt, old, reset, '-', data, len); } else { ecb->lno_in_postimage++; @@ -458,7 +466,7 @@ static void emit_rewrite_lines(struct emit_callback *ecb, if (!endp) { const char *plain = diff_get_color(ecb->color_diff, DIFF_PLAIN); - emit_line_0(ecb->file, plain, reset, '\\', + emit_line_0(ecb->opt, plain, reset, '\\', nneof, strlen(nneof)); } } @@ -508,7 +516,7 @@ static void emit_rewrite_diff(const char *name_a, ecbdata.color_diff = color_diff; ecbdata.found_changesp = &o->found_changes; ecbdata.ws_rule = whitespace_rule(name_b ? name_b : name_a); - ecbdata.file = o->file; + ecbdata.opt = o; if (ecbdata.ws_rule & WS_BLANK_AT_EOF) { mmfile_t mf1, mf2; mf1.ptr = (char *)data_one; @@ -840,7 +848,7 @@ static void fn_out_consume(void *priv, char *line, unsigned long len) const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); if (ecbdata->header) { - fprintf(ecbdata->file, "%s", ecbdata->header->buf); + fprintf(ecbdata->opt->file, "%s", ecbdata->header->buf); strbuf_reset(ecbdata->header); ecbdata->header = NULL; } @@ -852,9 +860,9 @@ static void fn_out_consume(void *priv, char *line, unsigned long len) name_a_tab = strchr(ecbdata->label_path[0], ' ') ? "\t" : ""; name_b_tab = strchr(ecbdata->label_path[1], ' ') ? "\t" : ""; - fprintf(ecbdata->file, "%s--- %s%s%s\n", + fprintf(ecbdata->opt->file, "%s--- %s%s%s\n", meta, ecbdata->label_path[0], reset, name_a_tab); - fprintf(ecbdata->file, "%s+++ %s%s%s\n", + fprintf(ecbdata->opt->file, "%s+++ %s%s%s\n", meta, ecbdata->label_path[1], reset, name_b_tab); ecbdata->label_path[0] = ecbdata->label_path[1] = NULL; } @@ -872,15 +880,15 @@ static void fn_out_consume(void *priv, char *line, unsigned long len) find_lno(line, ecbdata); emit_hunk_header(ecbdata, line, len); if (line[len-1] != '\n') - putc('\n', ecbdata->file); + putc('\n', ecbdata->opt->file); return; } if (len < 1) { - emit_line(ecbdata->file, reset, reset, line, len); + emit_line(ecbdata->opt, reset, reset, line, len); if (ecbdata->diff_words && ecbdata->diff_words->type == DIFF_WORDS_PORCELAIN) - fputs("~\n", ecbdata->file); + fputs("~\n", ecbdata->opt->file); return; } @@ -896,11 +904,11 @@ static void fn_out_consume(void *priv, char *line, unsigned long len) } diff_words_flush(ecbdata); if (ecbdata->diff_words->type == DIFF_WORDS_PORCELAIN) { - emit_line(ecbdata->file, plain, reset, line, len); - fputs("~\n", ecbdata->file); + emit_line(ecbdata->opt, plain, reset, line, len); + fputs("~\n", ecbdata->opt->file); } else { /* don't print the prefix character */ - emit_line(ecbdata->file, plain, reset, line+1, len-1); + emit_line(ecbdata->opt, plain, reset, line+1, len-1); } return; } @@ -912,7 +920,7 @@ static void fn_out_consume(void *priv, char *line, unsigned long len) ecbdata->lno_in_preimage++; if (line[0] == ' ') ecbdata->lno_in_postimage++; - emit_line(ecbdata->file, color, reset, line, len); + emit_line(ecbdata->opt, color, reset, line, len); } else { ecbdata->lno_in_postimage++; emit_add_line(reset, ecbdata, line + 1, len - 1); @@ -1477,7 +1485,7 @@ static void checkdiff_consume(void *priv, char *line, unsigned long len) fprintf(data->o->file, "%s:%d: %s.\n", data->filename, data->lineno, err); free(err); - emit_line(data->o->file, set, reset, line, 1); + emit_line(data->o, set, reset, line, 1); ws_check_emit(line + 1, len - 1, data->ws_rule, data->o->file, set, reset, ws); } else if (line[0] == ' ') { @@ -1787,7 +1795,7 @@ static void builtin_diff(const char *name_a, 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; + ecbdata.opt = o; ecbdata.header = header.len ? &header : NULL; xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts; xecfg.ctxlen = o->context; diff --git a/diff.h b/diff.h index 9ace08c..b4eefa7 100644 --- a/diff.h +++ b/diff.h @@ -9,6 +9,7 @@ struct rev_info; struct diff_options; struct diff_queue_struct; +struct strbuf; typedef void (*change_fn_t)(struct diff_options *options, unsigned old_mode, unsigned new_mode, @@ -25,6 +26,8 @@ typedef void (*add_remove_fn_t)(struct diff_options *options, typedef void (*diff_format_fn_t)(struct diff_queue_struct *q, struct diff_options *options, void *data); +typedef struct strbuf *(*diff_prefix_fn_t)(struct diff_options *opt, void *data); + #define DIFF_FORMAT_RAW 0x0001 #define DIFF_FORMAT_DIFFSTAT 0x0002 #define DIFF_FORMAT_NUMSTAT 0x0004 @@ -130,6 +133,8 @@ struct diff_options { add_remove_fn_t add_remove; diff_format_fn_t format_callback; void *format_callback_data; + diff_prefix_fn_t output_prefix; + void *output_prefix_data; }; enum color_diff {
-- 1.6.0.4