[PATCH v3 0/7] convert: add support for different encodings

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From: Lars Schneider <larsxschneider@xxxxxxxxx>

Hi,

Patches 1-5 and 6 are helper functions and preparation.
Patch 6 is the actual change.

I am still torn between "checkout-encoding" and "working-tree-encoding"
as attribute name. I am happy to hear arguments for/against one or the
other.

Changes since v2:

* Added Torsten's crlfsave refactoring patch (patch 5)
  @Torsten: I tried to make the commit message more clean, added
            some comments to and renamed conv_flags_eol to
            global_conv_flags_eol.

* Improved documentation and commit message (Torsten)

* Removed unnecessary NUL assignment in xstrdup_tolower() (Torsten)

* Set "git config core.eol lf" to made the test run on Windows (Dscho)

* Made BOM arrays static (Ramsay)


Thanks,
Lars


    RFC: https://public-inbox.org/git/BDB9B884-6D17-4BE3-A83C-F67E2AFA2B46@xxxxxxxxx/
     v1: https://public-inbox.org/git/20171211155023.1405-1-lars.schneider@xxxxxxxxxxxx/
     v2: https://public-inbox.org/git/20171229152222.39680-1-lars.schneider@xxxxxxxxxxxx/



Base Ref: master
Web-Diff: https://github.com/larsxschneider/git/commit/f21a1841a4
Checkout: git fetch https://github.com/larsxschneider/git encoding-v3 && git checkout f21a1841a4


### Interdiff (v2..v3):

diff --git a/Documentation/gitattributes.txt b/Documentation/gitattributes.txt
index 0039bd38c3..1bc03e69cb 100644
--- a/Documentation/gitattributes.txt
+++ b/Documentation/gitattributes.txt
@@ -285,11 +285,18 @@ In these cases you can teach Git the encoding of a file in the working
 directory with the `checkout-encoding` attribute. If a file with this
 attributes is added to Git, then Git reencodes the content from the
 specified encoding to UTF-8 and stores the result in its internal data
-structure. On checkout the content is encoded back to the specified
-encoding.
+structure (called "the index"). On checkout the content is encoded
+back to the specified encoding.

-Please note that using the `checkout-encoding` attribute has a number
-of drawbacks:
+Please note that using the `checkout-encoding` attribute may have a
+number of pitfalls:
+
+- Git clients that do not support the `checkout-encoding` attribute
+  will checkout the respective files UTF-8 encoded and not in the
+  expected encoding. Consequently, these files will appear different
+  which typically causes trouble. This is in particular the case for
+  older Git versions and alternative Git implementations such as JGit
+  or libgit2 (as of January 2018).

 - Reencoding content to non-UTF encodings (e.g. SHIFT-JIS) can cause
   errors as the conversion might not be round trip safe.
@@ -297,12 +304,6 @@ of drawbacks:
 - Reencoding content requires resources that might slow down certain
   Git operations (e.g 'git checkout' or 'git add').

-- Git clients that do not support the `checkout-encoding` attribute or
-  the used encoding will checkout the respective files as UTF-8 encoded.
-  That means the content appears to be different which could cause
-  trouble. Affected clients are older Git versions and alternative Git
-  implementations such as JGit or libgit2 (as of January 2018).
-
 Use the `checkout-encoding` attribute only if you cannot store a file in
 UTF-8 encoding and if you want Git to be able to process the content as
 text.
diff --git a/apply.c b/apply.c
index c4bd5cf1f2..f8b67bfee2 100644
--- a/apply.c
+++ b/apply.c
@@ -2263,8 +2263,8 @@ static void show_stats(struct apply_state *state, struct patch *patch)
 static int read_old_data(struct stat *st, struct patch *patch,
 			 const char *path, struct strbuf *buf)
 {
-	enum safe_crlf safe_crlf = patch->crlf_in_old ?
-		SAFE_CRLF_KEEP_CRLF : SAFE_CRLF_RENORMALIZE;
+	int conv_flags = patch->crlf_in_old ?
+		CONV_EOL_KEEP_CRLF : CONV_EOL_RENORMALIZE;
 	switch (st->st_mode & S_IFMT) {
 	case S_IFLNK:
 		if (strbuf_readlink(buf, path, st->st_size) < 0)
@@ -2281,7 +2281,7 @@ static int read_old_data(struct stat *st, struct patch *patch,
 		 * should never look at the index when explicit crlf option
 		 * is given.
 		 */
-		convert_to_git(NULL, path, buf->buf, buf->len, buf, safe_crlf, 0);
+		convert_to_git(NULL, path, buf->buf, buf->len, buf, conv_flags);
 		return 0;
 	default:
 		return -1;
diff --git a/blame.c b/blame.c
index 388b66897b..2893f3c103 100644
--- a/blame.c
+++ b/blame.c
@@ -229,7 +229,7 @@ static struct commit *fake_working_tree_commit(struct diff_options *opt,
 		if (strbuf_read(&buf, 0, 0) < 0)
 			die_errno("failed to read from stdin");
 	}
-	convert_to_git(&the_index, path, buf.buf, buf.len, &buf, 0, 0);
+	convert_to_git(&the_index, path, buf.buf, buf.len, &buf, 0);
 	origin->file.ptr = buf.buf;
 	origin->file.size = buf.len;
 	pretend_sha1_file(buf.buf, buf.len, OBJ_BLOB, origin->blob_oid.hash);
diff --git a/combine-diff.c b/combine-diff.c
index 4555e49b5f..19f30c3353 100644
--- a/combine-diff.c
+++ b/combine-diff.c
@@ -1053,7 +1053,7 @@ static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
 			if (is_file) {
 				struct strbuf buf = STRBUF_INIT;

-				if (convert_to_git(&the_index, elem->path, result, len, &buf, safe_crlf, 0)) {
+				if (convert_to_git(&the_index, elem->path, result, len, &buf, global_conv_flags_eol)) {
 					free(result);
 					result = strbuf_detach(&buf, &len);
 					result_size = len;
diff --git a/config.c b/config.c
index e617c2018d..1f003fbb90 100644
--- a/config.c
+++ b/config.c
@@ -1149,11 +1149,14 @@ static int git_default_core_config(const char *var, const char *value)
 	}

 	if (!strcmp(var, "core.safecrlf")) {
+		int eol_rndtrp_die;
 		if (value && !strcasecmp(value, "warn")) {
-			safe_crlf = SAFE_CRLF_WARN;
+			global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
 			return 0;
 		}
-		safe_crlf = git_config_bool(var, value);
+		eol_rndtrp_die = git_config_bool(var, value);
+		global_conv_flags_eol = eol_rndtrp_die ?
+			CONV_EOL_RNDTRP_DIE : CONV_EOL_RNDTRP_WARN;
 		return 0;
 	}

diff --git a/convert.c b/convert.c
index ca7b2f3e5c..525958bb56 100644
--- a/convert.c
+++ b/convert.c
@@ -194,30 +194,30 @@ static enum eol output_eol(enum crlf_action crlf_action)
 	return core_eol;
 }

-static void check_safe_crlf(const char *path, enum crlf_action crlf_action,
+static void check_global_conv_flags_eol(const char *path, enum crlf_action crlf_action,
 			    struct text_stat *old_stats, struct text_stat *new_stats,
-			    enum safe_crlf checksafe)
+			    int conv_flags)
 {
 	if (old_stats->crlf && !new_stats->crlf ) {
 		/*
 		 * CRLFs would not be restored by checkout
 		 */
-		if (checksafe == SAFE_CRLF_WARN)
+		if (conv_flags & CONV_EOL_RNDTRP_DIE)
+			die(_("CRLF would be replaced by LF in %s."), path);
+		else if (conv_flags & CONV_EOL_RNDTRP_WARN)
 			warning(_("CRLF will be replaced by LF in %s.\n"
 				  "The file will have its original line"
 				  " endings in your working directory."), path);
-		else /* i.e. SAFE_CRLF_FAIL */
-			die(_("CRLF would be replaced by LF in %s."), path);
 	} else if (old_stats->lonelf && !new_stats->lonelf ) {
 		/*
 		 * CRLFs would be added by checkout
 		 */
-		if (checksafe == SAFE_CRLF_WARN)
+		if (conv_flags & CONV_EOL_RNDTRP_DIE)
+			die(_("LF would be replaced by CRLF in %s"), path);
+		else if (conv_flags & CONV_EOL_RNDTRP_WARN)
 			warning(_("LF will be replaced by CRLF in %s.\n"
 				  "The file will have its original line"
 				  " endings in your working directory."), path);
-		else /* i.e. SAFE_CRLF_FAIL */
-			die(_("LF would be replaced by CRLF in %s"), path);
 	}
 }

@@ -287,7 +287,7 @@ static struct encoding {
 static const char *default_encoding = "UTF-8";

 static int encode_to_git(const char *path, const char *src, size_t src_len,
-			 struct strbuf *buf, struct encoding *enc, int write_obj)
+			 struct strbuf *buf, struct encoding *enc, int conv_flags)
 {
 	char *dst;
 	int dst_len;
@@ -318,7 +318,7 @@ static int encode_to_git(const char *path, const char *src, size_t src_len,
 			"file.");

 		advise(advise_msg, path, enc->name, enc->name, enc->name);
-		if (write_obj)
+		if (conv_flags & CONV_WRITE_OBJECT)
 			die(error_msg, path, enc->name);
 		else
 			error(error_msg, path, enc->name);
@@ -333,7 +333,7 @@ static int encode_to_git(const char *path, const char *src, size_t src_len,
 			"%sBE/%sLE as checkout encoding or add a BOM to the "
 			"file.");
 		advise(advise_msg, path, enc->name, enc->name, enc->name);
-		if (write_obj)
+		if (conv_flags & CONV_WRITE_OBJECT)
 			die(error_msg, path, enc->name);
 		else
 			error(error_msg, path, enc->name);
@@ -350,7 +350,7 @@ static int encode_to_git(const char *path, const char *src, size_t src_len,
 		 * working tree. Let's try to avoid this by screaming loud.
 		 */
 		const char* msg = _("failed to encode '%s' from %s to %s");
-		if (write_obj)
+		if (conv_flags & CONV_WRITE_OBJECT)
 			die(msg, path, enc->name, default_encoding);
 		else
 			error(msg, path, enc->name, default_encoding);
@@ -373,7 +373,7 @@ static int encode_to_git(const char *path, const char *src, size_t src_len,
 	 * [1] http://unicode.org/faq/utf_bom.html#gen2
 	 * [2] https://support.microsoft.com/en-us/help/170559/prb-conversion-problem-between-shift-jis-and-unicode
 	 */
-	if (write_obj && !strcmp(enc->name, "SHIFT-JIS")) {
+	if ((conv_flags & CONV_WRITE_OBJECT) && !strcmp(enc->name, "SHIFT-JIS")) {
 		char *re_src;
 		int re_src_len;

@@ -388,7 +388,7 @@ static int encode_to_git(const char *path, const char *src, size_t src_len,
 		    memcmp(src, re_src, src_len)) {
 			const char* msg = _("encoding '%s' from %s to %s and "
 					    "back is not the same");
-			if (write_obj)
+			if (conv_flags & CONV_WRITE_OBJECT)
 				die(msg, path, enc->name, default_encoding);
 			else
 				error(msg, path, enc->name, default_encoding);
@@ -429,7 +429,7 @@ static int encode_to_worktree(const char *path, const char *src, size_t src_len,
 static int crlf_to_git(const struct index_state *istate,
 		       const char *path, const char *src, size_t len,
 		       struct strbuf *buf,
-		       enum crlf_action crlf_action, enum safe_crlf checksafe)
+		       enum crlf_action crlf_action, int conv_flags)
 {
 	struct text_stat stats;
 	char *dst;
@@ -459,12 +459,12 @@ static int crlf_to_git(const struct index_state *istate,
 		 * unless we want to renormalize in a merge or
 		 * cherry-pick.
 		 */
-		if ((checksafe != SAFE_CRLF_RENORMALIZE) &&
+		if ((!(conv_flags & CONV_EOL_RENORMALIZE)) &&
 		    has_cr_in_index(istate, path))
 			convert_crlf_into_lf = 0;
 	}
-	if ((checksafe == SAFE_CRLF_WARN ||
-	    (checksafe == SAFE_CRLF_FAIL)) && len) {
+	if (((conv_flags & CONV_EOL_RNDTRP_WARN) ||
+	     ((conv_flags & CONV_EOL_RNDTRP_DIE) && len))) {
 		struct text_stat new_stats;
 		memcpy(&new_stats, &stats, sizeof(new_stats));
 		/* simulate "git add" */
@@ -477,7 +477,7 @@ static int crlf_to_git(const struct index_state *istate,
 			new_stats.crlf += new_stats.lonelf;
 			new_stats.lonelf = 0;
 		}
-		check_safe_crlf(path, crlf_action, &stats, &new_stats, checksafe);
+		check_global_conv_flags_eol(path, crlf_action, &stats, &new_stats, conv_flags);
 	}
 	if (!convert_crlf_into_lf)
 		return 0;
@@ -1319,7 +1319,7 @@ const char *get_convert_attr_ascii(const char *path)

 int convert_to_git(const struct index_state *istate,
 		   const char *path, const char *src, size_t len,
-		   struct strbuf *dst, enum safe_crlf checksafe, int write_obj)
+		   struct strbuf *dst, int conv_flags)
 {
 	int ret = 0;
 	struct conv_attrs ca;
@@ -1335,14 +1335,14 @@ int convert_to_git(const struct index_state *istate,
 		len = dst->len;
 	}

-	ret |= encode_to_git(path, src, len, dst, ca.checkout_encoding, write_obj);
+	ret |= encode_to_git(path, src, len, dst, ca.checkout_encoding, conv_flags);
 	if (ret && dst) {
 		src = dst->buf;
 		len = dst->len;
 	}

-	if (checksafe != SAFE_CRLF_KEEP_CRLF) {
-		ret |= crlf_to_git(istate, path, src, len, dst, ca.crlf_action, checksafe);
+	if (!(conv_flags & CONV_EOL_KEEP_CRLF)) {
+		ret |= crlf_to_git(istate, path, src, len, dst, ca.crlf_action, conv_flags);
 		if (ret && dst) {
 			src = dst->buf;
 			len = dst->len;
@@ -1353,7 +1353,7 @@ int convert_to_git(const struct index_state *istate,

 void convert_to_git_filter_fd(const struct index_state *istate,
 			      const char *path, int fd, struct strbuf *dst,
-			      enum safe_crlf checksafe, int write_obj)
+			      int conv_flags)
 {
 	struct conv_attrs ca;
 	convert_attrs(&ca, path);
@@ -1364,8 +1364,8 @@ void convert_to_git_filter_fd(const struct index_state *istate,
 	if (!apply_filter(path, NULL, 0, fd, dst, ca.drv, CAP_CLEAN, NULL))
 		die("%s: clean filter '%s' failed", path, ca.drv->name);

-	encode_to_git(path, dst->buf, dst->len, dst, ca.checkout_encoding, write_obj);
-	crlf_to_git(istate, path, dst->buf, dst->len, dst, ca.crlf_action, checksafe);
+	encode_to_git(path, dst->buf, dst->len, dst, ca.checkout_encoding, conv_flags);
+	crlf_to_git(istate, path, dst->buf, dst->len, dst, ca.crlf_action, conv_flags);
 	ident_to_git(path, dst->buf, dst->len, dst, ca.ident);
 }

@@ -1430,7 +1430,7 @@ int renormalize_buffer(const struct index_state *istate, const char *path,
 		src = dst->buf;
 		len = dst->len;
 	}
-	return ret | convert_to_git(istate, path, src, len, dst, SAFE_CRLF_RENORMALIZE, 0);
+	return ret | convert_to_git(istate, path, src, len, dst, CONV_EOL_RENORMALIZE);
 }

 /*****************************************************************
diff --git a/convert.h b/convert.h
index 9e4e884ec1..1d9539ed0b 100644
--- a/convert.h
+++ b/convert.h
@@ -8,15 +8,13 @@

 struct index_state;

-enum safe_crlf {
-	SAFE_CRLF_FALSE = 0,
-	SAFE_CRLF_FAIL = 1,
-	SAFE_CRLF_WARN = 2,
-	SAFE_CRLF_RENORMALIZE = 3,
-	SAFE_CRLF_KEEP_CRLF = 4
-};
+#define CONV_EOL_RNDTRP_DIE   (1<<0) /* Die if CRLF to LF to CRLF is different */
+#define CONV_EOL_RNDTRP_WARN  (1<<1) /* Warn if CRLF to LF to CRLF is different */
+#define CONV_EOL_RENORMALIZE  (1<<2) /* Convert CRLF to LF */
+#define CONV_EOL_KEEP_CRLF    (1<<3) /* Keep CRLF line endings as is */
+#define CONV_WRITE_OBJECT     (1<<4) /* Content is written to the index */

-extern enum safe_crlf safe_crlf;
+extern int global_conv_flags_eol;

 enum auto_crlf {
 	AUTO_CRLF_FALSE = 0,
@@ -66,8 +64,7 @@ extern const char *get_convert_attr_ascii(const char *path);
 /* returns 1 if *dst was used */
 extern int convert_to_git(const struct index_state *istate,
 			  const char *path, const char *src, size_t len,
-			  struct strbuf *dst, enum safe_crlf checksafe,
-			  int write_obj);
+			  struct strbuf *dst, int conv_flags);
 extern int convert_to_working_tree(const char *path, const char *src,
 				   size_t len, struct strbuf *dst);
 extern int async_convert_to_working_tree(const char *path, const char *src,
@@ -80,14 +77,13 @@ extern int renormalize_buffer(const struct index_state *istate,
 static inline int would_convert_to_git(const struct index_state *istate,
 				       const char *path)
 {
-	return convert_to_git(istate, path, NULL, 0, NULL, 0, 0);
+	return convert_to_git(istate, path, NULL, 0, NULL, 0);
 }
 /* Precondition: would_convert_to_git_filter_fd(path) == true */
 extern void convert_to_git_filter_fd(const struct index_state *istate,
 				     const char *path, int fd,
 				     struct strbuf *dst,
-				     enum safe_crlf checksafe,
-				     int write_obj);
+				     int conv_flags);
 extern int would_convert_to_git_filter_fd(const char *path);

 /*****************************************************************
diff --git a/diff.c b/diff.c
index 16ca0bf0df..fe3ff6e876 100644
--- a/diff.c
+++ b/diff.c
@@ -3516,13 +3516,13 @@ int diff_populate_filespec(struct diff_filespec *s, unsigned int flags)
 {
 	int size_only = flags & CHECK_SIZE_ONLY;
 	int err = 0;
+	int conv_flags = global_conv_flags_eol;
 	/*
 	 * demote FAIL to WARN to allow inspecting the situation
 	 * instead of refusing.
 	 */
-	enum safe_crlf crlf_warn = (safe_crlf == SAFE_CRLF_FAIL
-				    ? SAFE_CRLF_WARN
-				    : safe_crlf);
+	if (conv_flags & CONV_EOL_RNDTRP_DIE)
+		conv_flags = CONV_EOL_RNDTRP_WARN;

 	if (!DIFF_FILE_VALID(s))
 		die("internal error: asking to populate invalid file.");
@@ -3599,7 +3599,7 @@ int diff_populate_filespec(struct diff_filespec *s, unsigned int flags)
 		/*
 		 * Convert from working tree format to canonical git format
 		 */
-		if (convert_to_git(&the_index, s->path, s->data, s->size, &buf, crlf_warn, 0)) {
+		if (convert_to_git(&the_index, s->path, s->data, s->size, &buf, conv_flags)) {
 			size_t size = 0;
 			munmap(s->data, s->size);
 			s->should_munmap = 0;
diff --git a/environment.c b/environment.c
index 8fa032f307..888b873f90 100644
--- a/environment.c
+++ b/environment.c
@@ -49,7 +49,7 @@ enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
 int check_replace_refs = 1;
 char *git_replace_ref_base;
 enum eol core_eol = EOL_UNSET;
-enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
+int global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
 unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
 enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
 enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
diff --git a/sha1_file.c b/sha1_file.c
index 75800248d2..dcb02e9ffd 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -75,14 +75,14 @@ static struct cached_object *find_cached_object(const unsigned char *sha1)
 }


-static enum safe_crlf get_safe_crlf(unsigned flags)
+static int get_conv_flags(unsigned flags)
 {
 	if (flags & HASH_RENORMALIZE)
-		return SAFE_CRLF_RENORMALIZE;
+		return CONV_EOL_RENORMALIZE;
 	else if (flags & HASH_WRITE_OBJECT)
-		return safe_crlf;
+		return global_conv_flags_eol | CONV_WRITE_OBJECT;
 	else
-		return SAFE_CRLF_FALSE;
+		return 0;
 }


@@ -1694,8 +1694,7 @@ static int index_mem(struct object_id *oid, void *buf, size_t size,
 	if ((type == OBJ_BLOB) && path) {
 		struct strbuf nbuf = STRBUF_INIT;
 		if (convert_to_git(&the_index, path, buf, size, &nbuf,
-				   get_safe_crlf(flags),
-				   write_object)) {
+				   get_conv_flags(flags))) {
 			buf = strbuf_detach(&nbuf, &size);
 			re_allocated = 1;
 		}
@@ -1729,7 +1728,7 @@ static int index_stream_convert_blob(struct object_id *oid, int fd,
 	assert(would_convert_to_git_filter_fd(path));

 	convert_to_git_filter_fd(&the_index, path, fd, &sbuf,
-				 get_safe_crlf(flags), write_object);
+				 get_conv_flags(flags));

 	if (write_object)
 		ret = write_sha1_file(sbuf.buf, sbuf.len, typename(OBJ_BLOB),
diff --git a/strbuf.c b/strbuf.c
index 54276e96e7..703a1556cb 100644
--- a/strbuf.c
+++ b/strbuf.c
@@ -756,7 +756,6 @@ char *xstrdup_tolower(const char *string)
 	result = xmallocz(len);
 	for (i = 0; i < len; i++)
 		result[i] = tolower(string[i]);
-	result[i] = '\0';
 	return result;
 }

@@ -769,7 +768,6 @@ char *xstrdup_toupper(const char *string)
 	result = xmallocz(len);
 	for (i = 0; i < len; i++)
 		result[i] = toupper(string[i]);
-	result[i] = '\0';
 	return result;
 }

diff --git a/t/t0028-checkout-encoding.sh b/t/t0028-checkout-encoding.sh
index df3cc91269..5f1c911c07 100755
--- a/t/t0028-checkout-encoding.sh
+++ b/t/t0028-checkout-encoding.sh
@@ -7,11 +7,10 @@ test_description='checkout-encoding conversion via gitattributes'
 GIT_TRACE_CHECKOUT_ENCODING=1 && export GIT_TRACE_CHECKOUT_ENCODING

 test_expect_success 'setup test repo' '
+	git config core.eol lf &&

 	text="hallo there!\ncan you read me?" &&
-
 	echo "*.utf16 text checkout-encoding=utf-16" >.gitattributes &&
-
 	printf "$text" >test.utf8.raw &&
 	printf "$text" | iconv -f UTF-8 -t UTF-16 >test.utf16.raw &&
 	cp test.utf16.raw test.utf16 &&
diff --git a/utf8.c b/utf8.c
index 1978d6c42a..f033fec1c2 100644
--- a/utf8.c
+++ b/utf8.c
@@ -544,10 +544,10 @@ static int has_bom_prefix(const char *data, size_t len,
 	return (len >= bom_len) && !memcmp(data, bom, bom_len);
 }

-const char utf16_be_bom[] = {0xFE, 0xFF};
-const char utf16_le_bom[] = {0xFF, 0xFE};
-const char utf32_be_bom[] = {0x00, 0x00, 0xFE, 0xFF};
-const char utf32_le_bom[] = {0xFF, 0xFE, 0x00, 0x00};
+static const char utf16_be_bom[] = {0xFE, 0xFF};
+static const char utf16_le_bom[] = {0xFF, 0xFE};
+static const char utf32_be_bom[] = {0x00, 0x00, 0xFE, 0xFF};
+static const char utf32_le_bom[] = {0xFF, 0xFE, 0x00, 0x00};

 int has_prohibited_utf_bom(const char *enc, const char *data, size_t len)
 {


### Patches

Lars Schneider (6):
  strbuf: remove unnecessary NUL assignment in xstrdup_tolower()
  strbuf: add xstrdup_toupper()
  utf8: add function to detect prohibited UTF-16/32 BOM
  utf8: add function to detect a missing UTF-16/32 BOM
  convert: add support for 'checkout-encoding' attribute
  convert: add tracing for checkout-encoding

Torsten Bögershausen (1):
  convert_to_git(): safe_crlf/checksafe becomes int conv_flags

 Documentation/gitattributes.txt |  60 ++++++++++
 apply.c                         |   6 +-
 combine-diff.c                  |   2 +-
 config.c                        |   7 +-
 convert.c                       | 256 ++++++++++++++++++++++++++++++++++++----
 convert.h                       |  18 ++-
 diff.c                          |   8 +-
 environment.c                   |   2 +-
 sha1_file.c                     |  12 +-
 strbuf.c                        |  13 +-
 strbuf.h                        |   1 +
 t/t0028-checkout-encoding.sh    | 198 +++++++++++++++++++++++++++++++
 utf8.c                          |  37 ++++++
 utf8.h                          |  25 ++++
 14 files changed, 597 insertions(+), 48 deletions(-)
 create mode 100755 t/t0028-checkout-encoding.sh


base-commit: 95ec6b1b3393eb6e26da40c565520a8db9796e9f
--
2.15.1




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