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2012-11-04reencode_string(): introduce and use same_encoding()Libravatar Junio C Hamano1-0/+1
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>
2012-07-08git on Mac OS and precomposed unicodeLibravatar Torsten Bögershausen1-0/+1
Mac OS X mangles file names containing unicode on file systems HFS+, VFAT or SAMBA. When a file using unicode code points outside ASCII is created on a HFS+ drive, the file name is converted into decomposed unicode and written to disk. No conversion is done if the file name is already decomposed unicode. Calling open("\xc3\x84", ...) with a precomposed "Ä" yields the same result as open("\x41\xcc\x88",...) with a decomposed "Ä". As a consequence, readdir() returns the file names in decomposed unicode, even if the user expects precomposed unicode. Unlike on HFS+, Mac OS X stores files on a VFAT drive (e.g. an USB drive) in precomposed unicode, but readdir() still returns file names in decomposed unicode. When a git repository is stored on a network share using SAMBA, file names are send over the wire and written to disk on the remote system in precomposed unicode, but Mac OS X readdir() returns decomposed unicode to be compatible with its behaviour on HFS+ and VFAT. The unicode decomposition causes many problems: - The names "git add" and other commands get from the end user may often be precomposed form (the decomposed form is not easily input from the keyboard), but when the commands read from the filesystem to see what it is going to update the index with already is on the filesystem, readdir() will give decomposed form, which is different. - Similarly "git log", "git mv" and all other commands that need to compare pathnames found on the command line (often but not always precomposed form; a command line input resulting from globbing may be in decomposed) with pathnames found in the tree objects (should be precomposed form to be compatible with other systems and for consistency in general). - The same for names stored in the index, which should be precomposed, that may need to be compared with the names read from readdir(). NFS mounted from Linux is fully transparent and does not suffer from the above. As Mac OS X treats precomposed and decomposed file names as equal, we can - wrap readdir() on Mac OS X to return the precomposed form, and - normalize decomposed form given from the command line also to the precomposed form, to ensure that all pathnames used in Git are always in the precomposed form. This behaviour can be requested by setting "core.precomposedunicode" configuration variable to true. The code in compat/precomposed_utf8.c implements basically 4 new functions: precomposed_utf8_opendir(), precomposed_utf8_readdir(), precomposed_utf8_closedir() and precompose_argv(). The first three are to wrap opendir(3), readdir(3), and closedir(3) functions. The argv[] conversion allows to use the TAB filename completion done by the shell on command line. It tolerates other tools which use readdir() to feed decomposed file names into git. When creating a new git repository with "git init" or "git clone", "core.precomposedunicode" will be set "false". The user needs to activate this feature manually. She typically sets core.precomposedunicode to "true" on HFS and VFAT, or file systems mounted via SAMBA. Helped-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Torsten Bögershausen <tboegi@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-02-23strbuf: add fixed-length version of add_wrapped_textLibravatar Jeff King1-0/+2
The function strbuf_add_wrapped_text takes a NUL-terminated string. This makes it annoying to wrap strings we have as a pointer and a length. Refactoring strbuf_add_wrapped_text and all of its sub-functions to handle fixed-length strings turned out to be really ugly. So this implementation is lame; it just strdups the text and operates on the NUL-terminated version. This should be fine as the strings we are wrapping are generally pretty short. If it becomes a problem, we can optimize later. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-03-02Merge branch 'rs/optim-text-wrap'Libravatar Junio C Hamano1-1/+0
* rs/optim-text-wrap: utf8.c: speculatively assume utf-8 in strbuf_add_wrapped_text() utf8.c: remove strbuf_write() utf8.c: remove print_spaces() utf8.c: remove print_wrapped_text()
2010-02-20utf8.c: remove print_wrapped_text()Libravatar René Scharfe1-1/+0
strbuf_add_wrapped_text() is called only from print_wrapped_text() without a strbuf (in which case it writes its results to stdout). At its only callsite, supply a strbuf, call strbuf_add_wrapped_text() directly and remove the wrapper function. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-01-12utf8.c: mark file-local function staticLibravatar Junio C Hamano1-1/+0
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-10-19Add strbuf_add_wrapped_text() to utf8.[ch]Libravatar Johannes Schindelin1-0/+2
The newly added function can rewrap text according to a given first-line indent, other-indent and text width. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
2009-02-04utf8: add utf8_strwidth()Libravatar Geoffrey Thomas1-0/+1
I'm about to use this pattern more than once, so make it a common function. Signed-off-by: Geoffrey Thomas <geofft@mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-01-06utf8_width(): allow non NUL-terminated inputLibravatar Junio C Hamano1-2/+2
The original interface assumed that the input string is always terminated with a NUL, but that wasn't too useful. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-01-06utf8: pick_one_utf8_char()Libravatar Junio C Hamano1-0/+3
utf8_width() function was doing two different things. To pick a valid character from UTF-8 stream, and compute the display width of that character. This splits the former to a separate function pick_one_utf8_char(). Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-02-27Actually make print_wrapped_text() usefulLibravatar Johannes Schindelin1-1/+1
Now, it returns the current column, does not add a newline, and you can pass a negative indent, to indicate that the indent was already printed. With this, you can actually continue in the middle of a paragraph, not having to print everything into a buffer first. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-12-30commit-tree: cope with different ways "utf-8" can be spelled.Libravatar Junio C Hamano1-0/+2
People can spell config.commitencoding differently from what we internally have ("utf-8") to mean UTF-8. Try to accept them and treat them equally. Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-12-26Move encoding conversion routine out of mailinfo to utf8.cLibravatar Junio C Hamano1-0/+6
This moves the body of convert_to_utf8() routine used in mailinfo to the utf8.c i18n library. Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-12-24commit-tree: encourage UTF-8 commit messages.Libravatar Johannes Schindelin1-0/+8
Introduce is_utf() to check if a text looks like it is encoded in UTF-8, utf8_width() to count display width, and implements print_wrapped_text() using them. git-commit-tree warns if the commit message does not minimally conform to the UTF-8 encoding when i18n.commitencoding is either unset, or set to "utf-8". Signed-off-by: Junio C Hamano <junkio@cox.net>