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reencode_string(): introduce and use same_encoding() 

Callers of reencode_string() that re-encodes a string from one
encoding to another all used ad-hoc way to bypass the case where the
input and the output encodings are the same.  Some did strcmp(),
some did strcasecmp(), yet some others when converting to UTF-8 used
is_encoding_utf8().

Introduce same_encoding() helper function to make these callers use
the same logic.  Notably, is_encoding_utf8() has a work-around for
common misconfiguration to use "utf8" to name UTF-8 encoding, which
does not match "UTF-8" hence strcasecmp() would not consider the
same.  Make use of it in this helper function.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano 2012-10-18 22:41:56 -07:00 committed by Jeff King
parent 7e2010537e
commit 0e18bcd5e9
6 changed files with 12 additions and 4 deletions
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2
builtin/mailinfo.c
View File

@ -507,7 +507,7 @@ static void convert_to_utf8(struct strbuf *line, const char *charset)
return;
}
if (!strcasecmp(metainfo_charset, charset))
if (same_encoding(metainfo_charset, charset))
return;
out = reencode_string(line->buf, metainfo_charset, charset);
if (!out)

2
notes.c
View File

@ -1221,7 +1221,7 @@ void format_note(struct notes_tree *t, const unsigned char *object_sha1,
}
if (output_encoding && *output_encoding &&
strcmp(utf8, output_encoding)) {
!is_encoding_utf8(output_encoding)) {
char *reencoded = reencode_string(msg, output_encoding, utf8);
if (reencoded) {
free(msg);

2
pretty.c
View File

@ -504,7 +504,7 @@ char *logmsg_reencode(const struct commit *commit,
return NULL;
encoding = get_header(commit, "encoding");
use_encoding = encoding ? encoding : utf8;
if (!strcmp(use_encoding, output_encoding))
if (same_encoding(use_encoding, output_encoding))
if (encoding) /* we'll strip encoding header later */
out = xstrdup(commit->buffer);
else

2
sequencer.c
View File

@ -58,7 +58,7 @@ static int get_message(struct commit *commit, struct commit_message *out)
out->reencoded_message = NULL;
out->message = commit->buffer;
if (strcmp(encoding, git_commit_encoding))
if (same_encoding(encoding, git_commit_encoding))
out->reencoded_message = reencode_string(commit->buffer,
git_commit_encoding, encoding);
if (out->reencoded_message)

7
utf8.c
View File

@ -423,6 +423,13 @@ int is_encoding_utf8(const char *name)
return 0;
}
int same_encoding(const char *src, const char *dst)
{
if (is_encoding_utf8(src) && is_encoding_utf8(dst))
return 1;
return !strcasecmp(src, dst);
}
/*
* Given a buffer and its encoding, return it re-encoded
* with iconv. If the conversion fails, returns NULL.

1
utf8.h
View File

@ -7,6 +7,7 @@ int utf8_width(const char **start, size_t *remainder_p);
int utf8_strwidth(const char *string);
int is_utf8(const char *text);
int is_encoding_utf8(const char *name);
int same_encoding(const char *, const char *);
int strbuf_add_wrapped_text(struct strbuf *buf,
const char *text, int indent, int indent2, int width);