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824682ab51
When there is no `libgen.h` to our disposal, we miss the `dirname()`
function. Earlier we added basename() compatibility function for
the same reason at e1c06886 (compat: add a basename() compatibility
function, 2009-05-31).
So far, we only had one user of that function: credential-cache--daemon
(which was only compiled when Unix sockets are available, anyway). But
now we also have `builtin/am.c` as user, so we need it.
Since `dirname()` is a sibling of `basename()`, we simply put our very
own `gitdirname()` implementation next to `gitbasename()` and use it
if `NO_LIBGEN_H` has been set.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
71 lines
1.3 KiB
C
71 lines
1.3 KiB
C
#include "../git-compat-util.h"
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#include "../strbuf.h"
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/* Adapted from libiberty's basename.c. */
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char *gitbasename (char *path)
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{
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const char *base;
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if (path)
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skip_dos_drive_prefix(&path);
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if (!path || !*path)
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return ".";
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for (base = path; *path; path++) {
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if (!is_dir_sep(*path))
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continue;
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do {
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path++;
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} while (is_dir_sep(*path));
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if (*path)
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base = path;
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else
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while (--path != base && is_dir_sep(*path))
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*path = '\0';
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}
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return (char *)base;
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}
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char *gitdirname(char *path)
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{
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static struct strbuf buf = STRBUF_INIT;
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char *p = path, *slash = NULL, c;
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int dos_drive_prefix;
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if (!p)
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return ".";
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if ((dos_drive_prefix = skip_dos_drive_prefix(&p)) && !*p)
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goto dot;
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/*
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* POSIX.1-2001 says dirname("/") should return "/", and dirname("//")
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* should return "//", but dirname("///") should return "/" again.
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*/
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if (is_dir_sep(*p)) {
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if (!p[1] || (is_dir_sep(p[1]) && !p[2]))
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return path;
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slash = ++p;
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}
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while ((c = *(p++)))
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if (is_dir_sep(c)) {
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char *tentative = p - 1;
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/* POSIX.1-2001 says to ignore trailing slashes */
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while (is_dir_sep(*p))
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p++;
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if (*p)
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slash = tentative;
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}
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if (slash) {
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*slash = '\0';
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return path;
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}
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dot:
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strbuf_reset(&buf);
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strbuf_addf(&buf, "%.*s.", dos_drive_prefix, path);
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return buf.buf;
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}
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