+++ /dev/null
---- src/search.c.orig
-+++ src/search.c
-@@ -18,10 +18,15 @@
-
- /* Written August 1992 by Mike Haertel. */
-
-+#ifndef _GNU_SOURCE
-+# define _GNU_SOURCE 1
-+#endif
- #ifdef HAVE_CONFIG_H
- # include <config.h>
- #endif
-
-+#include <assert.h>
-+
- #include <sys/types.h>
-
- #include "mbsupport.h"
-@@ -43,6 +48,9 @@
- #ifdef HAVE_LIBPCRE
- # include <pcre.h>
- #endif
-+#ifdef HAVE_LANGINFO_CODESET
-+# include <langinfo.h>
-+#endif
-
- #define NCHAR (UCHAR_MAX + 1)
-
-@@ -68,6 +76,19 @@
- error (2, 0, _("memory exhausted"));
- }
-
-+/* UTF-8 encoding allows some optimizations that we can't otherwise
-+ assume in a multibyte encoding. */
-+static int using_utf8;
-+
-+void
-+check_utf8 (void)
-+{
-+#ifdef HAVE_LANGINFO_CODESET
-+ if (strcmp (nl_langinfo (CODESET), "UTF-8") == 0)
-+ using_utf8 = 1;
-+#endif
-+}
-+
- #ifndef FGREP_PROGRAM
- /* DFA compiled regexp. */
- static struct dfa dfa;
-@@ -134,49 +155,6 @@
- }
- #endif /* !FGREP_PROGRAM */
-
--#ifdef MBS_SUPPORT
--/* This function allocate the array which correspond to "buf".
-- Then this check multibyte string and mark on the positions which
-- are not single byte character nor the first byte of a multibyte
-- character. Caller must free the array. */
--static char*
--check_multibyte_string(char const *buf, size_t size)
--{
-- char *mb_properties = xmalloc(size);
-- mbstate_t cur_state;
-- wchar_t wc;
-- int i;
--
-- memset(&cur_state, 0, sizeof(mbstate_t));
-- memset(mb_properties, 0, sizeof(char)*size);
--
-- for (i = 0; i < size ;)
-- {
-- size_t mbclen;
-- mbclen = mbrtowc(&wc, buf + i, size - i, &cur_state);
--
-- if (mbclen == (size_t) -1 || mbclen == (size_t) -2 || mbclen == 0)
-- {
-- /* An invalid sequence, or a truncated multibyte character.
-- We treat it as a single byte character. */
-- mbclen = 1;
-- }
-- else if (match_icase)
-- {
-- if (iswupper((wint_t)wc))
-- {
-- wc = towlower((wint_t)wc);
-- wcrtomb(buf + i, wc, &cur_state);
-- }
-- }
-- mb_properties[i] = mbclen;
-- i += mbclen;
-- }
--
-- return mb_properties;
--}
--#endif /* MBS_SUPPORT */
--
- #if defined(GREP_PROGRAM) || defined(EGREP_PROGRAM)
- #ifdef EGREP_PROGRAM
- COMPILE_FCT(Ecompile)
-@@ -193,6 +171,7 @@
- size_t total = size;
- char const *motif = pattern;
-
-+ check_utf8 ();
- #if 0
- if (match_icase)
- syntax_bits |= RE_ICASE;
-#@@ -303,47 +282,78 @@ hunk6
-@@ -303,20 +282,9 @@ hunk6
- struct kwsmatch kwsm;
- size_t i, ret_val;
- #ifdef MBS_SUPPORT
-- char *mb_properties = NULL;
-- if (MB_CUR_MAX > 1)
-- {
-- if (match_icase)
-- {
-- char *case_buf = xmalloc(size);
-- memcpy(case_buf, buf, size);
-- if (start_ptr)
-- start_ptr = case_buf + (start_ptr - buf);
-- buf = case_buf;
-- }
-- if (kwset)
-- mb_properties = check_multibyte_string(buf, size);
-- }
-+ int mb_cur_max = MB_CUR_MAX;
-+ mbstate_t mbs;
-+ memset (&mbs, '\0', sizeof (mbstate_t));
- #endif /* MBS_SUPPORT */
-
- buflim = buf + size;
-@@ -329,21 +282,63 @@ hunk6
- if (kwset)
- {
- /* Find a possible match using the KWset matcher. */
-- size_t offset = kwsexec (kwset, beg, buflim - beg, &kwsm);
-+#ifdef MBS_SUPPORT
-+ size_t bytes_left = 0;
-+#endif /* MBS_SUPPORT */
-+ size_t offset;
-+#ifdef MBS_SUPPORT
-+ /* kwsexec doesn't work with match_icase and multibyte input. */
-+ if (match_icase && mb_cur_max > 1)
-+ /* Avoid kwset */
-+ offset = 0;
-+ else
-+#endif /* MBS_SUPPORT */
-+ offset = kwsexec (kwset, beg, buflim - beg, &kwsm);
- if (offset == (size_t) -1)
-- goto failure;
-+ return (size_t)-1;
-+#ifdef MBS_SUPPORT
-+ if (mb_cur_max > 1 && !using_utf8)
-+ {
-+ bytes_left = offset;
-+ while (bytes_left)
-+ {
-+ size_t mlen = mbrlen (beg, bytes_left, &mbs);
-+ if (mlen == (size_t) -1 || mlen == 0)
-+ {
-+ /* Incomplete character: treat as single-byte. */
-+ memset (&mbs, '\0', sizeof (mbstate_t));
-+ beg++;
-+ bytes_left--;
-+ continue;
-+ }
-+
-+ if (mlen == (size_t) -2)
-+ /* Offset points inside multibyte character:
-+ * no good. */
-+ break;
-+
-+ beg += mlen;
-+ bytes_left -= mlen;
-+ }
-+ }
-+ else
-+#endif /* MBS_SUPPORT */
- beg += offset;
- /* Narrow down to the line containing the candidate, and
- run it through DFA. */
- end = memchr(beg, eol, buflim - beg);
- end++;
- #ifdef MBS_SUPPORT
-- if (MB_CUR_MAX > 1 && mb_properties[beg - buf] == 0)
-+ if (mb_cur_max > 1 && bytes_left)
- continue;
- #endif
- while (beg > buf && beg[-1] != eol)
- --beg;
-- if (kwsm.index < kwset_exact_matches)
-+ if (
-+#ifdef MBS_SUPPORT
-+ !(match_icase && mb_cur_max > 1) &&
-+#endif /* MBS_SUPPORT */
-+ (kwsm.index < kwset_exact_matches))
- goto success;
- if (dfaexec (&dfa, beg, end - beg, &backref) == (size_t) -1)
- continue;
-@@ -351,13 +363,47 @@
- else
- {
- /* No good fixed strings; start with DFA. */
-+#ifdef MBS_SUPPORT
-+ size_t bytes_left = 0;
-+#endif /* MBS_SUPPORT */
- size_t offset = dfaexec (&dfa, beg, buflim - beg, &backref);
- if (offset == (size_t) -1)
- break;
- /* Narrow down to the line we've found. */
-+#ifdef MBS_SUPPORT
-+ if (mb_cur_max > 1 && !using_utf8)
-+ {
-+ bytes_left = offset;
-+ while (bytes_left)
-+ {
-+ size_t mlen = mbrlen (beg, bytes_left, &mbs);
-+ if (mlen == (size_t) -1 || mlen == 0)
-+ {
-+ /* Incomplete character: treat as single-byte. */
-+ memset (&mbs, '\0', sizeof (mbstate_t));
-+ beg++;
-+ bytes_left--;
-+ continue;
-+ }
-+
-+ if (mlen == (size_t) -2)
-+ /* Offset points inside multibyte character:
-+ * no good. */
-+ break;
-+
-+ beg += mlen;
-+ bytes_left -= mlen;
-+ }
-+ }
-+ else
-+#endif /* MBS_SUPPORT */
- beg += offset;
- end = memchr (beg, eol, buflim - beg);
- end++;
-+#ifdef MBS_SUPPORT
-+ if (mb_cur_max > 1 && bytes_left)
-+ continue;
-+#endif /* MBS_SUPPORT */
- while (beg > buf && beg[-1] != eol)
- --beg;
- }
-@@ -475,24 +521,144 @@
- *match_size = len;
- ret_val = beg - buf;
- out:
--#ifdef MBS_SUPPORT
-- if (MB_CUR_MAX > 1)
-- {
-- if (match_icase)
-- free((char*)buf);
-- if (mb_properties)
-- free(mb_properties);
-- }
--#endif /* MBS_SUPPORT */
- return ret_val;
- }
- #endif /* defined(GREP_PROGRAM) || defined(EGREP_PROGRAM) */
-
-+#ifdef MBS_SUPPORT
-+static int f_i_multibyte; /* whether we're using the new -Fi MB method */
-+static struct
-+{
-+ wchar_t **patterns;
-+ size_t count, maxlen;
-+ unsigned char *match;
-+} Fimb;
-+#endif
-+
- #if defined(GREP_PROGRAM) || defined(FGREP_PROGRAM)
- COMPILE_FCT(Fcompile)
- {
-+ int mb_cur_max = MB_CUR_MAX;
- char const *beg, *lim, *err;
-
-+ check_utf8 ();
-+#ifdef MBS_SUPPORT
-+ /* Support -F -i for UTF-8 input. */
-+ if (match_icase && mb_cur_max > 1)
-+ {
-+ mbstate_t mbs;
-+ wchar_t *wcpattern = xmalloc ((size + 1) * sizeof (wchar_t));
-+ const char *patternend = pattern;
-+ size_t wcsize;
-+ kwset_t fimb_kwset = NULL;
-+ char *starts = NULL;
-+ wchar_t *wcbeg, *wclim;
-+ size_t allocated = 0;
-+
-+ memset (&mbs, '\0', sizeof (mbs));
-+# ifdef __GNU_LIBRARY__
-+ wcsize = mbsnrtowcs (wcpattern, &patternend, size, size, &mbs);
-+ if (patternend != pattern + size)
-+ wcsize = (size_t) -1;
-+# else
-+ {
-+ char *patterncopy = xmalloc (size + 1);
-+
-+ memcpy (patterncopy, pattern, size);
-+ patterncopy[size] = '\0';
-+ patternend = patterncopy;
-+ wcsize = mbsrtowcs (wcpattern, &patternend, size, &mbs);
-+ if (patternend != patterncopy + size)
-+ wcsize = (size_t) -1;
-+ free (patterncopy);
-+ }
-+# endif
-+ if (wcsize + 2 <= 2)
-+ {
-+fimb_fail:
-+ free (wcpattern);
-+ free (starts);
-+ if (fimb_kwset)
-+ kwsfree (fimb_kwset);
-+ free (Fimb.patterns);
-+ Fimb.patterns = NULL;
-+ }
-+ else
-+ {
-+ if (!(fimb_kwset = kwsalloc (NULL)))
-+ error (2, 0, _("memory exhausted"));
-+
-+ starts = xmalloc (mb_cur_max * 3);
-+ wcbeg = wcpattern;
-+ do
-+ {
-+ int i;
-+ size_t wclen;
-+
-+ if (Fimb.count >= allocated)
-+ {
-+ if (allocated == 0)
-+ allocated = 128;
-+ else
-+ allocated *= 2;
-+ Fimb.patterns = xrealloc (Fimb.patterns,
-+ sizeof (wchar_t *) * allocated);
-+ }
-+ Fimb.patterns[Fimb.count++] = wcbeg;
-+ for (wclim = wcbeg;
-+ wclim < wcpattern + wcsize && *wclim != L'\n'; ++wclim)
-+ *wclim = towlower (*wclim);
-+ *wclim = L'\0';
-+ wclen = wclim - wcbeg;
-+ if (wclen > Fimb.maxlen)
-+ Fimb.maxlen = wclen;
-+ if (wclen > 3)
-+ wclen = 3;
-+ if (wclen == 0)
-+ {
-+ if ((err = kwsincr (fimb_kwset, "", 0)) != 0)
-+ error (2, 0, err);
-+ }
-+ else
-+ for (i = 0; i < (1 << wclen); i++)
-+ {
-+ char *p = starts;
-+ int j, k;
-+
-+ for (j = 0; j < wclen; ++j)
-+ {
-+ wchar_t wc = wcbeg[j];
-+ if (i & (1 << j))
-+ {
-+ wc = towupper (wc);
-+ if (wc == wcbeg[j])
-+ continue;
-+ }
-+ k = wctomb (p, wc);
-+ if (k <= 0)
-+ goto fimb_fail;
-+ p += k;
-+ }
-+ if ((err = kwsincr (fimb_kwset, starts, p - starts)) != 0)
-+ error (2, 0, err);
-+ }
-+ if (wclim < wcpattern + wcsize)
-+ ++wclim;
-+ wcbeg = wclim;
-+ }
-+ while (wcbeg < wcpattern + wcsize);
-+ f_i_multibyte = 1;
-+ kwset = fimb_kwset;
-+ free (starts);
-+ Fimb.match = xmalloc (Fimb.count);
-+ if ((err = kwsprep (kwset)) != 0)
-+ error (2, 0, err);
-+ return;
-+ }
-+ }
-+#endif /* MBS_SUPPORT */
-+
-+
- kwsinit ();
- beg = pattern;
- do
-@@ -511,6 +677,76 @@
- error (2, 0, err);
- }
-
-+#ifdef MBS_SUPPORT
-+static int
-+Fimbexec (const char *buf, size_t size, size_t *plen, int exact)
-+{
-+ size_t len, letter, i;
-+ int ret = -1;
-+ mbstate_t mbs;
-+ wchar_t wc;
-+ int patterns_left;
-+
-+ assert (match_icase && f_i_multibyte == 1);
-+ assert (MB_CUR_MAX > 1);
-+
-+ memset (&mbs, '\0', sizeof (mbs));
-+ memset (Fimb.match, '\1', Fimb.count);
-+ letter = len = 0;
-+ patterns_left = 1;
-+ while (patterns_left && len <= size)
-+ {
-+ size_t c;
-+
-+ patterns_left = 0;
-+ if (len < size)
-+ {
-+ c = mbrtowc (&wc, buf + len, size - len, &mbs);
-+ if (c + 2 <= 2)
-+ return ret;
-+
-+ wc = towlower (wc);
-+ }
-+ else
-+ {
-+ c = 1;
-+ wc = L'\0';
-+ }
-+
-+ for (i = 0; i < Fimb.count; i++)
-+ {
-+ if (Fimb.match[i])
-+ {
-+ if (Fimb.patterns[i][letter] == L'\0')
-+ {
-+ /* Found a match. */
-+ *plen = len;
-+ if (!exact && !match_words)
-+ return 0;
-+ else
-+ {
-+ /* For -w or exact look for longest match. */
-+ ret = 0;
-+ Fimb.match[i] = '\0';
-+ continue;
-+ }
-+ }
-+
-+ if (Fimb.patterns[i][letter] == wc)
-+ patterns_left = 1;
-+ else
-+ Fimb.match[i] = '\0';
-+ }
-+ }
-+
-+ len += c;
-+ letter++;
-+ }
-+
-+ return ret;
-+}
-+#endif /* MBS_SUPPORT */
-+
- EXECUTE_FCT(Fexecute)
- {
- register char const *beg, *try, *end;
-@@ -519,69 +755,256 @@
- struct kwsmatch kwsmatch;
- size_t ret_val;
- #ifdef MBS_SUPPORT
-- char *mb_properties = NULL;
-- if (MB_CUR_MAX > 1)
-- {
-- if (match_icase)
-- {
-- char *case_buf = xmalloc(size);
-- memcpy(case_buf, buf, size);
-- if (start_ptr)
-- start_ptr = case_buf + (start_ptr - buf);
-- buf = case_buf;
-- }
-- mb_properties = check_multibyte_string(buf, size);
-- }
-+ int mb_cur_max = MB_CUR_MAX;
-+ mbstate_t mbs;
-+ memset (&mbs, '\0', sizeof (mbstate_t));
-+ const char *last_char = NULL;
- #endif /* MBS_SUPPORT */
-
- for (beg = start_ptr ? start_ptr : buf; beg <= buf + size; beg++)
- {
- size_t offset = kwsexec (kwset, beg, buf + size - beg, &kwsmatch);
- if (offset == (size_t) -1)
-- goto failure;
-+ return offset;
- #ifdef MBS_SUPPORT
-- if (MB_CUR_MAX > 1 && mb_properties[offset+beg-buf] == 0)
-- continue; /* It is a part of multibyte character. */
-+ if (mb_cur_max > 1 && !using_utf8)
-+ {
-+ size_t bytes_left = offset;
-+ while (bytes_left)
-+ {
-+ size_t mlen = mbrlen (beg, bytes_left, &mbs);
-+
-+ last_char = beg;
-+ if (mlen == (size_t) -1 || mlen == 0)
-+ {
-+ /* Incomplete character: treat as single-byte. */
-+ memset (&mbs, '\0', sizeof (mbstate_t));
-+ beg++;
-+ bytes_left--;
-+ continue;
-+ }
-+
-+ if (mlen == (size_t) -2)
-+ /* Offset points inside multibyte character: no good. */
-+ break;
-+
-+ beg += mlen;
-+ bytes_left -= mlen;
-+ }
-+
-+ if (bytes_left)
-+ continue;
-+ }
-+ else
- #endif /* MBS_SUPPORT */
- beg += offset;
-+#ifdef MBS_SUPPORT
-+ /* For f_i_multibyte, the string at beg now matches first 3 chars of
-+ one of the search strings (less if there are shorter search strings).
-+ See if this is a real match. */
-+ if (f_i_multibyte
-+ && Fimbexec (beg, buf + size - beg, &kwsmatch.size[0], start_ptr == NULL))
-+ goto next_char;
-+#endif /* MBS_SUPPORT */
- len = kwsmatch.size[0];
- if (start_ptr && !match_words)
- goto success_in_beg_and_len;
- if (match_lines)
- {
- if (beg > buf && beg[-1] != eol)
-- continue;
-+ goto next_char;
- if (beg + len < buf + size && beg[len] != eol)
-- continue;
-+ goto next_char;
- goto success;
- }
- else if (match_words)
-- for (try = beg; len; )
-- {
-- if (try > buf && WCHAR((unsigned char) try[-1]))
-- break;
-- if (try + len < buf + size && WCHAR((unsigned char) try[len]))
-- {
-- offset = kwsexec (kwset, beg, --len, &kwsmatch);
-- if (offset == (size_t) -1)
-- break;
-- try = beg + offset;
-- len = kwsmatch.size[0];
-- }
-- else if (!start_ptr)
-- goto success;
-- else
-- goto success_in_beg_and_len;
-- } /* for (try) */
-- else
-- goto success;
-- } /* for (beg in buf) */
-+ {
-+ while (len)
-+ {
-+ int word_match = 0;
-+ if (beg > buf)
-+ {
-+#ifdef MBS_SUPPORT
-+ if (mb_cur_max > 1)
-+ {
-+ const char *s;
-+ int mr;
-+ wchar_t pwc;
-+
-+ if (using_utf8)
-+ {
-+ s = beg - 1;
-+ while (s > buf
-+ && (unsigned char) *s >= 0x80
-+ && (unsigned char) *s <= 0xbf)
-+ --s;
-+ }
-+ else
-+ s = last_char;
-+ mr = mbtowc (&pwc, s, beg - s);
-+ if (mr <= 0)
-+ memset (&mbs, '\0', sizeof (mbstate_t));
-+ else if ((iswalnum (pwc) || pwc == L'_')
-+ && mr == (int) (beg - s))
-+ goto next_char;
-+ }
-+ else
-+#endif /* MBS_SUPPORT */
-+ if (WCHAR ((unsigned char) beg[-1]))
-+ goto next_char;
-+ }
-+#ifdef MBS_SUPPORT
-+ if (mb_cur_max > 1)
-+ {
-+ wchar_t nwc;
-+ int mr;
-
-- failure:
-- ret_val = -1;
-- goto out;
-+ mr = mbtowc (&nwc, beg + len, buf + size - beg - len);
-+ if (mr <= 0)
-+ {
-+ memset (&mbs, '\0', sizeof (mbstate_t));
-+ word_match = 1;
-+ }
-+ else if (!iswalnum (nwc) && nwc != L'_')
-+ word_match = 1;
-+ }
-+ else
-+#endif /* MBS_SUPPORT */
-+ if (beg + len >= buf + size || !WCHAR ((unsigned char) beg[len]))
-+ word_match = 1;
-+ if (word_match)
-+ {
-+ if (start_ptr == NULL)
-+ /* Returns the whole line now we know there's a word match. */
-+ goto success;
-+ else {
-+ /* Returns just this word match. */
-+ *match_size = len;
-+ return beg - buf;
-+ }
-+ }
-+ if (len > 0)
-+ {
-+ /* Try a shorter length anchored at the same place. */
-+ --len;
-+ offset = kwsexec (kwset, beg, len, &kwsmatch);
-+
-+ if (offset == -1)
-+ goto next_char; /* Try a different anchor. */
-+#ifdef MBS_SUPPORT
-+
-+ if (mb_cur_max > 1 && !using_utf8)
-+ {
-+ size_t bytes_left = offset;
-+ while (bytes_left)
-+ {
-+ size_t mlen = mbrlen (beg, bytes_left, &mbs);
-+
-+ last_char = beg;
-+ if (mlen == (size_t) -1 || mlen == 0)
-+ {
-+ /* Incomplete character: treat as single-byte. */
-+ memset (&mbs, '\0', sizeof (mbstate_t));
-+ beg++;
-+ bytes_left--;
-+ continue;
-+ }
-+
-+ if (mlen == (size_t) -2)
-+ {
-+ /* Offset points inside multibyte character:
-+ * no good. */
-+ break;
-+ }
-+
-+ beg += mlen;
-+ bytes_left -= mlen;
-+ }
-+
-+ if (bytes_left)
-+ {
-+ memset (&mbs, '\0', sizeof (mbstate_t));
-+ goto next_char; /* Try a different anchor. */
-+ }
-+ }
-+ else
-+#endif /* MBS_SUPPORT */
-+ beg += offset;
-+#ifdef MBS_SUPPORT
-+ /* The string at beg now matches first 3 chars of one of
-+ the search strings (less if there are shorter search
-+ strings). See if this is a real match. */
-+ if (f_i_multibyte
-+ && Fimbexec (beg, len - offset, &kwsmatch.size[0],
-+ start_ptr == NULL))
-+ goto next_char;
-+#endif /* MBS_SUPPORT */
-+ len = kwsmatch.size[0];
-+ }
-+ }
-+ }
-+ else
-+ goto success;
-+next_char:;
-+#ifdef MBS_SUPPORT
-+ /* Advance to next character. For MB_CUR_MAX == 1 case this is handled
-+ by ++beg above. */
-+ if (mb_cur_max > 1)
-+ {
-+ if (using_utf8)
-+ {
-+ unsigned char c = *beg;
-+ if (c >= 0xc2)
-+ {
-+ if (c < 0xe0)
-+ ++beg;
-+ else if (c < 0xf0)
-+ beg += 2;
-+ else if (c < 0xf8)
-+ beg += 3;
-+ else if (c < 0xfc)
-+ beg += 4;
-+ else if (c < 0xfe)
-+ beg += 5;
-+ }
-+ }
-+ else
-+ {
-+ size_t l = mbrlen (beg, buf + size - beg, &mbs);
-+
-+ last_char = beg;
-+ if (l + 2 >= 2)
-+ beg += l - 1;
-+ else
-+ memset (&mbs, '\0', sizeof (mbstate_t));
-+ }
-+ }
-+#endif /* MBS_SUPPORT */
-+ }
-+
-+ return -1;
-
- success:
-+#ifdef MBS_SUPPORT
-+ if (mb_cur_max > 1 && !using_utf8)
-+ {
-+ end = beg + len;
-+ while (end < buf + size)
-+ {
-+ size_t mlen = mbrlen (end, buf + size - end, &mbs);
-+ if (mlen == (size_t) -1 || mlen == (size_t) -2 || mlen == 0)
-+ {
-+ memset (&mbs, '\0', sizeof (mbstate_t));
-+ mlen = 1;
-+ }
-+ if (mlen == 1 && *end == eol)
-+ break;
-+
-+ end += mlen;
-+ }
-+ }
-+ else
-+ #endif /* MBS_SUPPORT */
- end = memchr (beg + len, eol, (buf + size) - (beg + len));
- end++;
- while (buf < beg && beg[-1] != eol)
-@@ -591,15 +1016,6 @@
- *match_size = len;
- ret_val = beg - buf;
- out:
--#ifdef MBS_SUPPORT
-- if (MB_CUR_MAX > 1)
-- {
-- if (match_icase)
-- free((char*)buf);
-- if (mb_properties)
-- free(mb_properties);
-- }
--#endif /* MBS_SUPPORT */
- return ret_val;
- }
- #endif /* defined(GREP_PROGRAM) || defined(FGREP_PROGRAM) */
projects / packages / grep.git / commitdiff