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lsteamclient: Collapse path in dos to unix conversion.

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CW-Bug-Id: #23664
This commit is contained in:
Paul Gofman 2024-04-10 17:15:06 -06:00
parent 4e289629ce
commit 0b317f8464
1 changed files with 72 additions and 4 deletions
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76
lsteamclient/unixlib.cpp
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@ -433,6 +433,74 @@ NTSTATUS steamclient_Steam_NotifyMissingInterface( void *args )
#define IS_ABSOLUTE( x ) (*x == '/' || *x == '\\' || (*x && *(x + 1) == ':'))
static void collapse_path( WCHAR *path, UINT mark )
{
WCHAR *p, *next;
/* convert every / into a \ */
for (p = path; *p; p++) if (*p == '/') *p = '\\';
/* collapse duplicate backslashes */
next = path + std::max( 1u, mark );
for (p = next; *p; p++) if (*p != '\\' || next[-1] != '\\') *next++ = *p;
*next = 0;
p = path + mark;
while (*p)
{
if (*p == '.')
{
switch(p[1])
{
case '\\': /* .\ component */
next = p + 2;
memmove( p, next, (wcslen(next) + 1) * sizeof(WCHAR) );
continue;
case 0: /* final . */
if (p > path + mark) p--;
*p = 0;
continue;
case '.':
if (p[2] == '\\') /* ..\ component */
{
next = p + 3;
if (p > path + mark)
{
p--;
while (p > path + mark && p[-1] != '\\') p--;
}
memmove( p, next, (wcslen(next) + 1) * sizeof(WCHAR) );
continue;
}
else if (!p[2]) /* final .. */
{
if (p > path + mark)
{
p--;
while (p > path + mark && p[-1] != '\\') p--;
if (p > path + mark) p--;
}
*p = 0;
continue;
}
break;
}
}
/* skip to the next component */
while (*p && *p != '\\') p++;
if (*p == '\\')
{
/* remove last dot in previous dir name */
if (p > path + mark && p[-1] == '.') memmove( p-1, p, (wcslen(p) + 1) * sizeof(WCHAR) );
else p++;
}
}
/* remove trailing spaces and dots (yes, Windows really does that, don't ask) */
while (p > path + mark && (p[-1] == ' ' || p[-1] == '.')) p--;
*p = 0;
}
static char *get_unix_file_name( const WCHAR *path )
{
UNICODE_STRING nt_name;
@ -488,7 +556,7 @@ char *steamclient_dos_to_unix_path( const char *src, int is_url )
if (IS_ABSOLUTE( src ))
{
/* absolute path, use wine conversion */
WCHAR srcW[PATH_MAX] = {'\\', '?', '?', '\\', 0}, *tmp;
WCHAR srcW[PATH_MAX] = {'\\', '?', '?', '\\', 0};
char *unix_path;
uint32_t r;
@ -497,7 +565,7 @@ char *steamclient_dos_to_unix_path( const char *src, int is_url )
if (r == 0) unix_path = NULL;
else
{
for (tmp = srcW; *tmp; ++tmp) if (*tmp == '/') *tmp = '\\';
collapse_path( srcW, 4 );
unix_path = get_unix_file_name( srcW );
}
@ -544,7 +612,7 @@ const char **steamclient_dos_to_unix_path_array( const char **src )
size_t len;
const char **s;
char **out, **o;
WCHAR scratch[PATH_MAX] = {'\\', '?', '?', '\\', 0}, *tmp;
WCHAR scratch[PATH_MAX] = {'\\', '?', '?', '\\', 0};
TRACE( "src %p\n", src );
@ -561,7 +629,7 @@ const char **steamclient_dos_to_unix_path_array( const char **src )
if (IS_ABSOLUTE( *s ))
{
ntdll_umbstowcs( *s, -1, scratch + 4, PATH_MAX - 4 );
for (tmp = scratch; *tmp; ++tmp) if (*tmp == '/') *tmp = '\\';
collapse_path( scratch, 4 );
*o = get_unix_file_name( scratch );
}
else