str *_resolve_link(str *path) {
/**
Internal helper function. Takes a path and follows symlinks
until we either arrive at something that isn't a symlink, or
encounter a path we've seen before (meaning that there's a loop).
*/
list<str *> *paths_seen;
str *dir, *resolved;
paths_seen = (new list<str *>());
while(islink(path)) {
if (paths_seen->__contains__(path)) {
return 0;
}
paths_seen->append(path);
resolved = __os__::readlink(path);
if ((!isabs(resolved))) {
dir = dirname(path);
path = normpath(join(2, dir, resolved));
}
else {
path = normpath(resolved);
}
}
return path;
}
static char *
relpath(char *from, char *to)
{
int up;
char *p = to, *rel;
assert(from[0] == '/');
assert(to[0] == '/');
normpath(from);
normpath(to);
for (; *from == *to && *to; from++, to++) {
if (*to == '/')
p = to;
}
for (up = -1, from--; from && *from; from = strchr(from + 1, '/'), up++);
rel = calloc(3 * up + strlen(p), sizeof(char));
while (up--)
strcat(rel, "../");
if (*p)
strcat(rel, p+1);
return rel;
}
static std::string pathcat(std::string path, std::string label)
{
if (path.empty())
return normpath(label);
else if (label.empty())
return normpath(path);
else
return normpath(path+"/"+label);
}
// Normalize a file path.
// remove relative path component (..\ and .\),
// replace slashes by backslashes,
// convert to long form.
//
// Returns a pointer to a memory allocated block containing the normalized string.
// The caller is responsible for freeing the block.
// Returns NULL if the file does not exist or if a memory allocation fails.
//
// Precondition: the file must exist on the file system.
//
// Note:
// - the case of the root component is preserved
// - the case of rest is set to the way it is stored on the file system
//
// e.g. suppose the a file "C:\foo\Bar.Pdf" exists on the file system then
// "c:\foo\bar.pdf" becomes "c:\foo\Bar.Pdf"
// "C:\foo\BAR.PDF" becomes "C:\foo\Bar.Pdf"
WCHAR *Normalize(const WCHAR *path)
{
// convert to absolute path, change slashes into backslashes
DWORD cch = GetFullPathName(path, 0, NULL, NULL);
if (!cch)
return str::Dup(path);
ScopedMem<WCHAR> fullpath(AllocArray<WCHAR>(cch));
GetFullPathName(path, cch, fullpath, NULL);
// convert to long form
cch = GetLongPathName(fullpath, NULL, 0);
if (!cch)
return fullpath.StealData();
ScopedMem<WCHAR> normpath(AllocArray<WCHAR>(cch));
GetLongPathName(fullpath, normpath, cch);
if (cch <= MAX_PATH)
return normpath.StealData();
// handle overlong paths: first, try to shorten the path
cch = GetShortPathName(fullpath, NULL, 0);
if (cch && cch <= MAX_PATH) {
ScopedMem<WCHAR> shortpath(AllocArray<WCHAR>(cch));
GetShortPathName(fullpath, shortpath, cch);
if (str::Len(path::GetBaseName(normpath)) + path::GetBaseName(shortpath) - shortpath < MAX_PATH) {
// keep the long filename if possible
*(WCHAR *)path::GetBaseName(shortpath) = '\0';
return str::Join(shortpath, path::GetBaseName(normpath));
}
return shortpath.StealData();
}
// else mark the path as overlong
if (str::StartsWith(normpath.Get(), L"\\\\?\\"))
return normpath.StealData();
return str::Join(L"\\\\?\\", normpath);
}
//prepends cwd, normpathifys, etc
static int prepare_path(const unsigned char *pathin, unsigned char *pathout, int outsize) {
if (pathin[0] == '/') { //do nothing?
strncpy(pathout, pathin, outsize);
return 0;
}
Process *p = process_get_current(0);
if (!p) {
strncpy(pathout, pathin, outsize);
pathout[outsize-1] = 0;
return -1;
}
pathout[0] = 0;
strcat(pathout, p->working_path);
int len = strlen(pathout);
if (len == 0 && pathin[0] != '/') {
strcat(pathout, "/");
} else if (len != 0 && pathin[0] == '/' && pathout[len-1] == '/') {
pathout[len-1] = 0;
}
strcat(pathout, (unsigned char*)pathin);
normpath(pathout, outsize);
return 0;
}
// Normalizes the file path and the converts it into a short form that
// can be used for interaction with non-UNICODE aware applications
WCHAR *ShortPath(const WCHAR *path)
{
ScopedMem<WCHAR> normpath(Normalize(path));
DWORD cch = GetShortPathName(normpath, NULL, 0);
if (!cch)
return normpath.StealData();
WCHAR *shortpath = AllocArray<WCHAR>(cch);
GetShortPathName(normpath, shortpath, cch);
return shortpath;
}
gchar *
get_full_path(const gchar * location, const gchar * path)
{
gchar *dir;
dir = g_path_get_dirname(location);
setptr(dir, g_build_filename(dir, path, NULL));
setptr(dir, normpath(dir));
return dir;
}
str *abspath(str *path) {
/**
Return an absolute path.
*/
if ((!isabs(path))) {
path = join(2, __os__::getcwd(), path);
}
return normpath(path);
}
gchar *
get_relative_path(const gchar * location, const gchar * path)
{
gchar *dir;
gchar *pth;
gchar *ret = NULL;
gint plen;
gint dlen;
if (!g_path_is_absolute(path))
{
return g_strdup(path);
}
dir = normpath(location);
pth = normpath(path);
plen = strlen(pth);
dlen = strlen(dir);
if (strstr(pth, dir) == pth)
{
if (plen > dlen)
{
ret = g_strdup(path + strlen(dir) + 1);
}
else if (plen == dlen)
{
ret = g_strdup(".");
}
}
g_free(dir);
g_free(pth);
return ret;
}
static const char *
normpath(char *path)
{
char *seg, *p;
for (p = path, seg = NULL; *p; p++) {
if (strncmp(p, "/../", 4) == 0 || strncmp(p, "/..", 4) == 0) {
memmove(seg ? seg : p, p+3, strlen(p+3) + 1);
return normpath(path);
} else if (strncmp(p, "/./", 3) == 0 || strncmp(p, "/.", 3) == 0) {
memmove(p, p+2, strlen(p+2) + 1);
} else if (strncmp(p, "//", 2) == 0 || strncmp(p, "/", 2) == 0) {
memmove(p, p+1, strlen(p+1) + 1);
}
if (*p == '/')
seg = p;
}
return path;
}
char *win_realpath(const char *path, char *resolved_path)
{
return normpath(path, resolved_path);
}
std::string abspath(const std::string & path)
{
std::string p = path;
if(!isabs(p)) p = join(getcwd(), p);
return normpath(p);
}
/* Open a zip-compatible archive and extract all files
* into the specified directory (which is assumed to exist)
*/
BOOL
unzip_archive(SCHEME *scheme, char *dirname, char *data, DWORD size,
NOTIFYPROC notify)
{
int n;
char pathname[MAX_PATH];
char *new_part;
/* read the end of central directory record */
struct eof_cdir *pe = (struct eof_cdir *)&data[size - sizeof
(struct eof_cdir)];
int arc_start = size - sizeof (struct eof_cdir) - pe->nBytesCDir -
pe->ofsCDir;
/* set position to start of central directory */
int pos = arc_start + pe->ofsCDir;
/* make sure this is a zip file */
if (pe->tag != 0x06054b50)
return FALSE;
/* Loop through the central directory, reading all entries */
for (n = 0; n < pe->nTotalCDir; ++n) {
int i;
char *fname;
char *pcomp;
char *dst;
struct cdir *pcdir;
struct fhdr *pfhdr;
pcdir = (struct cdir *)&data[pos];
pfhdr = (struct fhdr *)&data[pcdir->ofs_local_header +
arc_start];
if (pcdir->tag != 0x02014b50)
return FALSE;
if (pfhdr->tag != 0x04034b50)
return FALSE;
pos += sizeof(struct cdir);
fname = (char *)&data[pos]; /* This is not null terminated! */
pos += pcdir->fname_length + pcdir->extra_length +
pcdir->comment_length;
pcomp = &data[pcdir->ofs_local_header
+ sizeof(struct fhdr)
+ arc_start
+ pfhdr->fname_length
+ pfhdr->extra_length];
/* dirname is the Python home directory (prefix) */
strcpy(pathname, dirname);
if (pathname[strlen(pathname)-1] != '\\')
strcat(pathname, "\\");
new_part = &pathname[lstrlen(pathname)];
/* we must now match the first part of the pathname
* in the archive to a component in the installation
* scheme (PURELIB, PLATLIB, HEADERS, SCRIPTS, or DATA)
* and replace this part by the one in the scheme to use
*/
for (i = 0; scheme[i].name; ++i) {
if (0 == strnicmp(scheme[i].name, fname,
strlen(scheme[i].name))) {
char *rest;
int len;
/* length of the replaced part */
int namelen = strlen(scheme[i].name);
strcat(pathname, scheme[i].prefix);
rest = fname + namelen;
len = pfhdr->fname_length - namelen;
if ((pathname[strlen(pathname)-1] != '\\')
&& (pathname[strlen(pathname)-1] != '/'))
strcat(pathname, "\\");
/* Now that pathname ends with a separator,
* we must make sure rest does not start with
* an additional one.
*/
if ((rest[0] == '\\') || (rest[0] == '/')) {
++rest;
--len;
}
strncat(pathname, rest, len);
goto Done;
}
}
/* no prefix to replace found, go unchanged */
strncat(pathname, fname, pfhdr->fname_length);
Done:
normpath(pathname);
if (pathname[strlen(pathname)-1] != '\\') {
/*
* The local file header (pfhdr) does not always
* contain the compressed and uncompressed sizes of
* the data depending on bit 3 of the flags field. So
* it seems better to use the data from the central
* directory (pcdir).
*/
dst = map_new_file(0, pathname, new_part,
pcdir->uncomp_size,
pcdir->last_mod_file_date,
pcdir->last_mod_file_time, notify);
if (dst) {
if (!extract_file(dst, pcomp, pfhdr->method,
pcdir->comp_size,
pcdir->uncomp_size,
notify))
return FALSE;
} /* else ??? */
}
if (notify)
notify(NUM_FILES, new_part, (int)pe->nTotalCDir,
(int)n+1);
}
return TRUE;
}
std::string path::expand(const std::string &path) {
return normpath(expandvars(expanduser(path)));
}
