f4609b896f
This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because there is some breakage in the git build related to the netrc credentials helper which someone has taken care of in nixpkgs. The stable channel is not used for anything other than git, so this should be fine. Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb
52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
#include "../../git-compat-util.h"
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int win32_has_dos_drive_prefix(const char *path)
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{
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int i;
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/*
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* Does it start with an ASCII letter (i.e. highest bit not set),
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* followed by a colon?
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*/
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if (!(0x80 & (unsigned char)*path))
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return *path && path[1] == ':' ? 2 : 0;
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/*
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* While drive letters must be letters of the English alphabet, it is
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* possible to assign virtually _any_ Unicode character via `subst` as
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* a drive letter to "virtual drives". Even `1`, or `ä`. Or fun stuff
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* like this:
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*
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* subst ֍: %USERPROFILE%\Desktop
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*/
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for (i = 1; i < 4 && (0x80 & (unsigned char)path[i]); i++)
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; /* skip first UTF-8 character */
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return path[i] == ':' ? i + 1 : 0;
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}
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int win32_skip_dos_drive_prefix(char **path)
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{
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int ret = has_dos_drive_prefix(*path);
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*path += ret;
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return ret;
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}
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int win32_offset_1st_component(const char *path)
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{
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char *pos = (char *)path;
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/* unc paths */
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if (!skip_dos_drive_prefix(&pos) &&
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is_dir_sep(pos[0]) && is_dir_sep(pos[1])) {
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/* skip server name */
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pos = strpbrk(pos + 2, "\\/");
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if (!pos)
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return 0; /* Error: malformed unc path */
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do {
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pos++;
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} while (*pos && !is_dir_sep(*pos));
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}
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return pos + is_dir_sep(*pos) - path;
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}
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