mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
6531e12e0b
* win32/file.c (code_page_i, rb_w32_init_file): make encoding to code page mapping at initialization directly. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43169 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
691 lines
18 KiB
C
691 lines
18 KiB
C
#include "ruby/ruby.h"
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#include "ruby/encoding.h"
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#include "internal.h"
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#include <winbase.h>
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#include <wchar.h>
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#include <shlwapi.h>
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#ifndef INVALID_FILE_ATTRIBUTES
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# define INVALID_FILE_ATTRIBUTES ((DWORD)-1)
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#endif
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/* cache 'encoding name' => 'code page' into a hash */
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static st_table *rb_code_page;
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#define IS_DIR_SEPARATOR_P(c) (c == L'\\' || c == L'/')
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#define IS_DIR_UNC_P(c) (IS_DIR_SEPARATOR_P(c[0]) && IS_DIR_SEPARATOR_P(c[1]))
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/* MultiByteToWideChar() doesn't work with code page 51932 */
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#define INVALID_CODE_PAGE 51932
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#define PATH_BUFFER_SIZE MAX_PATH * 2
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#define insecure_obj_p(obj, level) ((level) >= 4 || ((level) > 0 && OBJ_TAINTED(obj)))
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static inline void
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replace_wchar(wchar_t *s, int find, int replace)
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{
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while (*s != 0) {
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if (*s == find)
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*s = replace;
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s++;
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}
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}
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/* Convert str from multibyte char to wchar with specified code page */
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static inline void
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convert_mb_to_wchar(const char *str, wchar_t **wstr, size_t *wstr_len, UINT code_page)
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{
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size_t len;
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len = MultiByteToWideChar(code_page, 0, str, -1, NULL, 0) + 1;
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*wstr = (wchar_t *)xmalloc(len * sizeof(wchar_t));
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MultiByteToWideChar(code_page, 0, str, -1, *wstr, len);
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*wstr_len = len - 2;
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}
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static inline void
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convert_wchar_to_mb(const wchar_t *wstr, char **str, size_t *str_len, UINT code_page)
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{
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size_t len;
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len = WideCharToMultiByte(code_page, 0, wstr, -1, NULL, 0, NULL, NULL);
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*str = (char *)xmalloc(len * sizeof(char));
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WideCharToMultiByte(code_page, 0, wstr, -1, *str, len, NULL, NULL);
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/* do not count terminator as part of the string length */
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*str_len = len - 1;
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}
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/*
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Return user's home directory using environment variables combinations.
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Memory allocated by this function should be manually freed afterwards.
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Try:
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HOME, HOMEDRIVE + HOMEPATH and USERPROFILE environment variables
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TODO: Special Folders - Profile and Personal
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*/
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static wchar_t *
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home_dir(void)
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{
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wchar_t *buffer = NULL;
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size_t buffer_len = 0, len = 0;
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size_t home_env = 0;
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/*
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GetEnvironmentVariableW when used with NULL will return the required
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buffer size and its terminating character.
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http://msdn.microsoft.com/en-us/library/windows/desktop/ms683188(v=vs.85).aspx
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*/
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if (len = GetEnvironmentVariableW(L"HOME", NULL, 0)) {
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buffer_len = len;
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home_env = 1;
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}
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else if (len = GetEnvironmentVariableW(L"HOMEDRIVE", NULL, 0)) {
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buffer_len = len;
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if (len = GetEnvironmentVariableW(L"HOMEPATH", NULL, 0)) {
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buffer_len += len;
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home_env = 2;
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}
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else {
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buffer_len = 0;
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}
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}
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else if (len = GetEnvironmentVariableW(L"USERPROFILE", NULL, 0)) {
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buffer_len = len;
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home_env = 3;
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}
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/* allocate buffer */
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if (home_env)
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buffer = (wchar_t *)xmalloc(buffer_len * sizeof(wchar_t));
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switch (home_env) {
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case 1:
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/* HOME */
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GetEnvironmentVariableW(L"HOME", buffer, buffer_len);
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break;
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case 2:
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/* HOMEDRIVE + HOMEPATH */
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len = GetEnvironmentVariableW(L"HOMEDRIVE", buffer, buffer_len);
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GetEnvironmentVariableW(L"HOMEPATH", buffer + len, buffer_len - len);
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break;
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case 3:
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/* USERPROFILE */
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GetEnvironmentVariableW(L"USERPROFILE", buffer, buffer_len);
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break;
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default:
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break;
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}
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if (home_env) {
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/* sanitize backslashes with forwardslashes */
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replace_wchar(buffer, L'\\', L'/');
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return buffer;
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}
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return NULL;
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}
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/* Remove trailing invalid ':$DATA' of the path. */
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static inline size_t
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remove_invalid_alternative_data(wchar_t *wfullpath, size_t size)
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{
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static const wchar_t prime[] = L":$DATA";
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enum { prime_len = (sizeof(prime) / sizeof(wchar_t)) -1 };
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if (size <= prime_len || _wcsnicmp(wfullpath + size - prime_len, prime, prime_len) != 0)
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return size;
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/* alias of stream */
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/* get rid of a bug of x64 VC++ */
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if (wfullpath[size - (prime_len + 1)] == ':') {
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/* remove trailing '::$DATA' */
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size -= prime_len + 1; /* prime */
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wfullpath[size] = L'\0';
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}
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else {
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/* remove trailing ':$DATA' of paths like '/aa:a:$DATA' */
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wchar_t *pos = wfullpath + size - (prime_len + 1);
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while (!IS_DIR_SEPARATOR_P(*pos) && pos != wfullpath) {
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if (*pos == L':') {
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size -= prime_len; /* alternative */
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wfullpath[size] = L'\0';
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break;
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}
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pos--;
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}
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}
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return size;
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}
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/* Return system code page. */
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static inline UINT
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system_code_page(void)
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{
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return AreFileApisANSI() ? CP_ACP : CP_OEMCP;
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}
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void rb_enc_foreach_name(int (*func)(st_data_t name, st_data_t idx, st_data_t arg), st_data_t arg);
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static int
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code_page_i(st_data_t name, st_data_t idx, st_data_t arg)
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{
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const char *n = (const char *)name;
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if (strncmp("CP", n, 2) == 0) {
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int code_page = atoi(n + 2);
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if (code_page != 0) {
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st_insert((st_table *)arg, (st_data_t)idx, (st_data_t)code_page);
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}
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}
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return ST_CONTINUE;
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}
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/*
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Return code page number of the encoding.
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Cache code page into a hash for performance since finding the code page in
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Encoding#names is slow.
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*/
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static UINT
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code_page(rb_encoding *enc)
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{
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int enc_idx;
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st_data_t code_page_value;
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if (!enc)
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return system_code_page();
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enc_idx = rb_enc_to_index(enc);
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/* map US-ASCII and ASCII-8bit as code page 1252 (us-ascii) */
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if (enc_idx == rb_usascii_encindex() || enc_idx == rb_ascii8bit_encindex()) {
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return 1252;
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}
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if (st_lookup(rb_code_page, enc_idx, &code_page_value))
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return (UINT)code_page_value;
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return INVALID_CODE_PAGE;
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}
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#define fix_string_encoding(str, encoding) rb_str_conv_enc((str), (encoding), rb_utf8_encoding())
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/*
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Replace the last part of the path to long name.
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We try to avoid to call FindFirstFileW() since it takes long time.
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*/
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static inline size_t
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replace_to_long_name(wchar_t **wfullpath, size_t size, int heap)
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{
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WIN32_FIND_DATAW find_data;
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HANDLE find_handle;
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/*
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Skip long name conversion if the path is already long name.
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Short name is 8.3 format.
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http://en.wikipedia.org/wiki/8.3_filename
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This check can be skipped for directory components that have file
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extensions longer than 3 characters, or total lengths longer than
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12 characters.
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http://msdn.microsoft.com/en-us/library/windows/desktop/aa364980(v=vs.85).aspx
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*/
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size_t const max_short_name_size = 8 + 1 + 3;
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size_t const max_extension_size = 3;
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size_t path_len = 1, extension_len = 0;
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wchar_t *pos = *wfullpath;
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if (size == 3 && pos[1] == L':' && pos[2] == L'\\' && pos[3] == L'\0') {
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/* root path doesn't need short name expansion */
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return size;
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}
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/* skip long name conversion if path contains wildcard characters */
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if (wcspbrk(pos, L"*?")) {
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return size;
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}
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pos = *wfullpath + size - 1;
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while (!IS_DIR_SEPARATOR_P(*pos) && pos != *wfullpath) {
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if (!extension_len && *pos == L'.') {
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extension_len = path_len - 1;
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}
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if (path_len > max_short_name_size || extension_len > max_extension_size) {
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return size;
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}
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path_len++;
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pos--;
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}
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find_handle = FindFirstFileW(*wfullpath, &find_data);
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if (find_handle != INVALID_HANDLE_VALUE) {
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size_t trail_pos = wcslen(*wfullpath);
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size_t file_len = wcslen(find_data.cFileName);
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FindClose(find_handle);
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while (trail_pos > 0) {
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if (IS_DIR_SEPARATOR_P((*wfullpath)[trail_pos]))
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break;
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trail_pos--;
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}
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size = trail_pos + 1 + file_len;
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if ((size + 1) > sizeof(*wfullpath) / sizeof((*wfullpath)[0])) {
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wchar_t *buf = (wchar_t *)xmalloc((size + 1) * sizeof(wchar_t));
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wcsncpy(buf, *wfullpath, trail_pos + 1);
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if (heap)
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xfree(*wfullpath);
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*wfullpath = buf;
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}
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wcsncpy(*wfullpath + trail_pos + 1, find_data.cFileName, file_len + 1);
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}
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return size;
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}
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static inline VALUE
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get_user_from_path(wchar_t **wpath, int offset, UINT cp, UINT path_cp, rb_encoding *path_encoding)
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{
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VALUE result, tmp;
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wchar_t *wuser = *wpath + offset;
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wchar_t *pos = wuser;
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char *user;
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size_t size;
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while (!IS_DIR_SEPARATOR_P(*pos) && *pos != '\0')
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pos++;
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*pos = '\0';
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convert_wchar_to_mb(wuser, &user, &size, cp);
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/* convert to VALUE and set the path encoding */
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if (path_cp == INVALID_CODE_PAGE) {
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tmp = rb_enc_str_new(user, size, rb_utf8_encoding());
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result = rb_str_encode(tmp, rb_enc_from_encoding(path_encoding), 0, Qnil);
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rb_str_resize(tmp, 0);
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}
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else {
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result = rb_enc_str_new(user, size, path_encoding);
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}
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if (user)
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xfree(user);
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return result;
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}
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VALUE
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rb_file_expand_path_internal(VALUE fname, VALUE dname, int abs_mode, int long_name, VALUE result)
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{
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size_t size = 0, wpath_len = 0, wdir_len = 0, whome_len = 0;
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size_t buffer_len = 0;
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char *fullpath = NULL;
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wchar_t *wfullpath = NULL, *wpath = NULL, *wpath_pos = NULL;
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wchar_t *wdir = NULL, *wdir_pos = NULL;
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wchar_t *whome = NULL, *buffer = NULL, *buffer_pos = NULL;
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UINT path_cp, cp;
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VALUE path = fname, dir = dname;
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wchar_t wfullpath_buffer[PATH_BUFFER_SIZE];
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wchar_t path_drive = L'\0', dir_drive = L'\0';
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int ignore_dir = 0;
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rb_encoding *path_encoding;
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int tainted = 0;
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/* tainted if path is tainted */
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tainted = OBJ_TAINTED(path);
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/* get path encoding */
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if (NIL_P(dir)) {
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path_encoding = rb_enc_get(path);
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}
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else {
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path_encoding = rb_enc_check(path, dir);
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}
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cp = path_cp = code_page(path_encoding);
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/* workaround invalid codepage */
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if (path_cp == INVALID_CODE_PAGE) {
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cp = CP_UTF8;
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if (!NIL_P(path)) {
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path = fix_string_encoding(path, path_encoding);
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}
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}
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/* convert char * to wchar_t */
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if (!NIL_P(path)) {
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convert_mb_to_wchar(RSTRING_PTR(path), &wpath, &wpath_len, cp);
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wpath_pos = wpath;
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}
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/* determine if we need the user's home directory */
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/* expand '~' only if NOT rb_file_absolute_path() where `abs_mode` is 1 */
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if (abs_mode == 0 && wpath_len > 0 && wpath_pos[0] == L'~' &&
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(wpath_len == 1 || IS_DIR_SEPARATOR_P(wpath_pos[1]))) {
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/* tainted if expanding '~' */
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tainted = 1;
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whome = home_dir();
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if (whome == NULL) {
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xfree(wpath);
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rb_raise(rb_eArgError, "couldn't find HOME environment -- expanding `~'");
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}
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whome_len = wcslen(whome);
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if (PathIsRelativeW(whome) && !(whome_len >= 2 && IS_DIR_UNC_P(whome))) {
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xfree(wpath);
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rb_raise(rb_eArgError, "non-absolute home");
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}
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/* use filesystem encoding if expanding home dir */
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path_encoding = rb_filesystem_encoding();
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cp = path_cp = system_code_page();
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/* ignores dir since we are expanding home */
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ignore_dir = 1;
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/* exclude ~ from the result */
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wpath_pos++;
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wpath_len--;
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/* exclude separator if present */
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if (wpath_len && IS_DIR_SEPARATOR_P(wpath_pos[0])) {
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wpath_pos++;
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wpath_len--;
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}
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}
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else if (wpath_len >= 2 && wpath_pos[1] == L':') {
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if (wpath_len >= 3 && IS_DIR_SEPARATOR_P(wpath_pos[2])) {
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/* ignore dir since path contains a drive letter and a root slash */
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ignore_dir = 1;
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}
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else {
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/* determine if we ignore dir or not later */
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path_drive = wpath_pos[0];
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}
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}
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else if (abs_mode == 0 && wpath_len >= 2 && wpath_pos[0] == L'~') {
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result = get_user_from_path(&wpath_pos, 1, cp, path_cp, path_encoding);
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if (wpath)
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xfree(wpath);
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rb_raise(rb_eArgError, "can't find user %s", StringValuePtr(result));
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}
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/* convert dir */
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if (!ignore_dir && !NIL_P(dir)) {
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/* fix string encoding */
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if (path_cp == INVALID_CODE_PAGE) {
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dir = fix_string_encoding(dir, path_encoding);
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}
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/* convert char * to wchar_t */
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if (!NIL_P(dir)) {
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convert_mb_to_wchar(RSTRING_PTR(dir), &wdir, &wdir_len, cp);
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wdir_pos = wdir;
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}
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if (abs_mode == 0 && wdir_len > 0 && wdir_pos[0] == L'~' &&
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(wdir_len == 1 || IS_DIR_SEPARATOR_P(wdir_pos[1]))) {
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/* tainted if expanding '~' */
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tainted = 1;
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whome = home_dir();
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if (whome == NULL) {
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xfree(wpath);
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xfree(wdir);
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rb_raise(rb_eArgError, "couldn't find HOME environment -- expanding `~'");
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}
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whome_len = wcslen(whome);
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if (PathIsRelativeW(whome) && !(whome_len >= 2 && IS_DIR_UNC_P(whome))) {
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xfree(wpath);
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xfree(wdir);
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rb_raise(rb_eArgError, "non-absolute home");
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}
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/* exclude ~ from the result */
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wdir_pos++;
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wdir_len--;
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/* exclude separator if present */
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if (wdir_len && IS_DIR_SEPARATOR_P(wdir_pos[0])) {
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wdir_pos++;
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wdir_len--;
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}
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}
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else if (wdir_len >= 2 && wdir[1] == L':') {
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dir_drive = wdir[0];
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if (wpath_len && IS_DIR_SEPARATOR_P(wpath_pos[0])) {
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wdir_len = 2;
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}
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}
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else if (wdir_len >= 2 && IS_DIR_UNC_P(wdir)) {
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/* UNC path */
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if (wpath_len && IS_DIR_SEPARATOR_P(wpath_pos[0])) {
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/* cut the UNC path tail to '//host/share' */
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size_t separators = 0;
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size_t pos = 2;
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while (pos < wdir_len && separators < 2) {
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if (IS_DIR_SEPARATOR_P(wdir[pos])) {
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separators++;
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}
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pos++;
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}
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if (separators == 2)
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wdir_len = pos - 1;
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}
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}
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else if (abs_mode == 0 && wdir_len >= 2 && wdir_pos[0] == L'~') {
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result = get_user_from_path(&wdir_pos, 1, cp, path_cp, path_encoding);
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if (wpath)
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xfree(wpath);
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if (wdir)
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xfree(wdir);
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rb_raise(rb_eArgError, "can't find user %s", StringValuePtr(result));
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}
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}
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/* determine if we ignore dir or not */
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|
if (!ignore_dir && path_drive && dir_drive) {
|
|
if (towupper(path_drive) == towupper(dir_drive)) {
|
|
/* exclude path drive letter to use dir */
|
|
wpath_pos += 2;
|
|
wpath_len -= 2;
|
|
}
|
|
else {
|
|
/* ignore dir since path drive is different from dir drive */
|
|
ignore_dir = 1;
|
|
wdir_len = 0;
|
|
}
|
|
}
|
|
|
|
if (!ignore_dir && wpath_len >= 2 && IS_DIR_UNC_P(wpath)) {
|
|
/* ignore dir since path has UNC root */
|
|
ignore_dir = 1;
|
|
wdir_len = 0;
|
|
}
|
|
else if (!ignore_dir && wpath_len >= 1 && IS_DIR_SEPARATOR_P(wpath[0]) &&
|
|
!dir_drive && !(wdir_len >= 2 && IS_DIR_UNC_P(wdir))) {
|
|
/* ignore dir since path has root slash and dir doesn't have drive or UNC root */
|
|
ignore_dir = 1;
|
|
wdir_len = 0;
|
|
}
|
|
|
|
buffer_len = wpath_len + 1 + wdir_len + 1 + whome_len + 1;
|
|
|
|
buffer = buffer_pos = (wchar_t *)xmalloc((buffer_len + 1) * sizeof(wchar_t));
|
|
|
|
/* add home */
|
|
if (whome_len) {
|
|
wcsncpy(buffer_pos, whome, whome_len);
|
|
buffer_pos += whome_len;
|
|
}
|
|
|
|
/* Add separator if required */
|
|
if (whome_len && wcsrchr(L"\\/:", buffer_pos[-1]) == NULL) {
|
|
buffer_pos[0] = L'\\';
|
|
buffer_pos++;
|
|
}
|
|
|
|
if (wdir_len) {
|
|
/* tainted if dir is used and dir is tainted */
|
|
if (!tainted && OBJ_TAINTED(dir))
|
|
tainted = 1;
|
|
|
|
wcsncpy(buffer_pos, wdir_pos, wdir_len);
|
|
buffer_pos += wdir_len;
|
|
}
|
|
|
|
/* add separator if required */
|
|
if (wdir_len && wcsrchr(L"\\/:", buffer_pos[-1]) == NULL) {
|
|
buffer_pos[0] = L'\\';
|
|
buffer_pos++;
|
|
}
|
|
|
|
/* now deal with path */
|
|
if (wpath_len) {
|
|
wcsncpy(buffer_pos, wpath_pos, wpath_len);
|
|
buffer_pos += wpath_len;
|
|
}
|
|
|
|
/* GetFullPathNameW requires at least "." to determine current directory */
|
|
if (wpath_len == 0) {
|
|
buffer_pos[0] = L'.';
|
|
buffer_pos++;
|
|
}
|
|
|
|
/* Ensure buffer is NULL terminated */
|
|
buffer_pos[0] = L'\0';
|
|
|
|
/* tainted if path is relative */
|
|
if (!tainted && PathIsRelativeW(buffer) && !(buffer_len >= 2 && IS_DIR_UNC_P(buffer)))
|
|
tainted = 1;
|
|
|
|
/* FIXME: Make this more robust */
|
|
/* Determine require buffer size */
|
|
size = GetFullPathNameW(buffer, PATH_BUFFER_SIZE, wfullpath_buffer, NULL);
|
|
if (size > PATH_BUFFER_SIZE) {
|
|
/* allocate more memory than alloted originally by PATH_BUFFER_SIZE */
|
|
wfullpath = (wchar_t *)xmalloc(size * sizeof(wchar_t));
|
|
size = GetFullPathNameW(buffer, size, wfullpath, NULL);
|
|
}
|
|
else {
|
|
wfullpath = wfullpath_buffer;
|
|
}
|
|
|
|
/* Remove any trailing slashes */
|
|
if (IS_DIR_SEPARATOR_P(wfullpath[size - 1]) &&
|
|
wfullpath[size - 2] != L':' &&
|
|
!(size == 2 && IS_DIR_UNC_P(wfullpath))) {
|
|
size -= 1;
|
|
wfullpath[size] = L'\0';
|
|
}
|
|
|
|
/* Remove any trailing dot */
|
|
if (wfullpath[size - 1] == L'.') {
|
|
size -= 1;
|
|
wfullpath[size] = L'\0';
|
|
}
|
|
|
|
/* removes trailing invalid ':$DATA' */
|
|
size = remove_invalid_alternative_data(wfullpath, size);
|
|
|
|
/* Replace the trailing path to long name */
|
|
if (long_name)
|
|
size = replace_to_long_name(&wfullpath, size, (wfullpath != wfullpath_buffer));
|
|
|
|
/* sanitize backslashes with forwardslashes */
|
|
replace_wchar(wfullpath, L'\\', L'/');
|
|
|
|
/* convert to char * */
|
|
size = WideCharToMultiByte(cp, 0, wfullpath, size, NULL, 0, NULL, NULL);
|
|
if (size > (size_t)RSTRING_LEN(result)) {
|
|
rb_str_modify(result);
|
|
rb_str_resize(result, size);
|
|
}
|
|
|
|
WideCharToMultiByte(cp, 0, wfullpath, size, RSTRING_PTR(result), size, NULL, NULL);
|
|
rb_str_set_len(result, size);
|
|
|
|
/* convert to VALUE and set the path encoding */
|
|
if (path_cp == INVALID_CODE_PAGE) {
|
|
VALUE tmp;
|
|
size_t len;
|
|
|
|
rb_enc_associate(result, rb_utf8_encoding());
|
|
ENC_CODERANGE_CLEAR(result);
|
|
tmp = rb_str_encode(result, rb_enc_from_encoding(path_encoding), 0, Qnil);
|
|
len = RSTRING_LEN(tmp);
|
|
rb_str_modify(result);
|
|
rb_str_resize(result, len);
|
|
memcpy(RSTRING_PTR(result), RSTRING_PTR(tmp), len);
|
|
rb_str_resize(tmp, 0);
|
|
}
|
|
rb_enc_associate(result, path_encoding);
|
|
ENC_CODERANGE_CLEAR(result);
|
|
|
|
/* makes the result object tainted if expanding tainted strings or returning modified path */
|
|
if (tainted)
|
|
OBJ_TAINT(result);
|
|
|
|
/* TODO: better cleanup */
|
|
if (buffer)
|
|
xfree(buffer);
|
|
|
|
if (wpath)
|
|
xfree(wpath);
|
|
|
|
if (wdir)
|
|
xfree(wdir);
|
|
|
|
if (whome)
|
|
xfree(whome);
|
|
|
|
if (wfullpath && wfullpath != wfullpath_buffer)
|
|
xfree(wfullpath);
|
|
|
|
if (fullpath)
|
|
xfree(fullpath);
|
|
|
|
return result;
|
|
}
|
|
|
|
int
|
|
rb_file_load_ok(const char *path)
|
|
{
|
|
DWORD attr;
|
|
int ret = 1;
|
|
size_t len;
|
|
wchar_t* wpath;
|
|
|
|
convert_mb_to_wchar(path, &wpath, &len, CP_UTF8);
|
|
|
|
attr = GetFileAttributesW(wpath);
|
|
if (attr == INVALID_FILE_ATTRIBUTES ||
|
|
(attr & FILE_ATTRIBUTE_DIRECTORY)) {
|
|
ret = 0;
|
|
}
|
|
else {
|
|
HANDLE h = CreateFileW(wpath, GENERIC_READ,
|
|
FILE_SHARE_READ | FILE_SHARE_WRITE,
|
|
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
|
|
if (h != INVALID_HANDLE_VALUE) {
|
|
CloseHandle(h);
|
|
}
|
|
else {
|
|
ret = 0;
|
|
}
|
|
}
|
|
xfree(wpath);
|
|
return ret;
|
|
}
|
|
|
|
void
|
|
rb_w32_init_file(void)
|
|
{
|
|
rb_code_page = st_init_numtable();
|
|
rb_enc_foreach_name(code_page_i, (st_data_t)rb_code_page);
|
|
}
|