-/* Reads the contents of a file into memory. */
-static char *
-file_get_contents(const tchar *filename, size_t *len_ret)
-{
- struct stat stbuf;
- void *buf = NULL;
- size_t len;
- FILE *fp;
-
- if (tstat(filename, &stbuf) != 0) {
- imagex_error_with_errno(T("Failed to stat the file \"%"TS"\""), filename);
- goto out;
- }
- len = stbuf.st_size;
-
- fp = tfopen(filename, T("rb"));
- if (!fp) {
- imagex_error_with_errno(T("Failed to open the file \"%"TS"\""), filename);
- goto out;
- }
-
- buf = malloc(len ? len : 1);
- if (!buf) {
- imagex_error(T("Failed to allocate buffer of %zu bytes to hold "
- "contents of file \"%"TS"\""), len, filename);
- goto out_fclose;
- }
- if (fread(buf, 1, len, fp) != len) {
- imagex_error_with_errno(T("Failed to read %zu bytes from the "
- "file \"%"TS"\""), len, filename);
- goto out_free_buf;
- }
- *len_ret = len;
- goto out_fclose;
-out_free_buf:
- free(buf);
- buf = NULL;
-out_fclose:
- fclose(fp);
-out:
- return buf;
-}
-
-/* Read standard input until EOF and return the full contents in a malloc()ed
- * buffer and the number of bytes of data in @len_ret. Returns NULL on read
- * error. */
-static char *
-stdin_get_contents(size_t *len_ret)
-{
- /* stdin can, of course, be a pipe or other non-seekable file, so the
- * total length of the data cannot be pre-determined */
- char *buf = NULL;
- size_t newlen = 1024;
- size_t pos = 0;
- size_t inc = 1024;
- for (;;) {
- char *p = realloc(buf, newlen);
- size_t bytes_read, bytes_to_read;
- if (!p) {
- imagex_error(T("out of memory while reading stdin"));
- break;
- }
- buf = p;
- bytes_to_read = newlen - pos;
- bytes_read = fread(&buf[pos], 1, bytes_to_read, stdin);
- pos += bytes_read;
- if (bytes_read != bytes_to_read) {
- if (feof(stdin)) {
- *len_ret = pos;
- return buf;
- } else {
- imagex_error_with_errno(T("error reading stdin"));
- break;
- }
- }
- newlen += inc;
- inc *= 3;
- inc /= 2;
- }
- free(buf);
- return NULL;
-}
-
-
-static tchar *
-translate_text_to_tstr(char *text, size_t num_bytes, size_t *num_tchars_ret)
-{
-#ifndef _WIN32
- /* On non-Windows, assume an ASCII-compatible encoding, such as UTF-8.
- * */
- *num_tchars_ret = num_bytes;
- return text;
-#else /* !_WIN32 */
- /* On Windows, translate the text to UTF-16LE */
- wchar_t *text_wstr;
- size_t num_wchars;
-
- if (num_bytes >= 2 &&
- (((unsigned char)text[0] == 0xff && (unsigned char)text[1] == 0xfe) ||
- ((unsigned char)text[0] <= 0x7f && (unsigned char)text[1] == 0x00)))
- {
- /* File begins with 0xfeff, the BOM for UTF-16LE, or it begins
- * with something that looks like an ASCII character encoded as
- * a UTF-16LE code unit. Assume the file is encoded as
- * UTF-16LE. This is not a 100% reliable check. */
- num_wchars = num_bytes / 2;
- text_wstr = (wchar_t*)text;
- } else {
- /* File does not look like UTF-16LE. Assume it is encoded in
- * the current Windows code page. I think these are always
- * ASCII-compatible, so any so-called "plain-text" (ASCII) files
- * should work as expected. */
- text_wstr = win32_mbs_to_wcs(text,
- num_bytes,
- &num_wchars);
- free(text);
- }
- *num_tchars_ret = num_wchars;
- return text_wstr;
-#endif /* _WIN32 */
-}
-
-static tchar *
-file_get_text_contents(const tchar *filename, size_t *num_tchars_ret)
-{
- char *contents;
- size_t num_bytes;
-
- contents = file_get_contents(filename, &num_bytes);
- if (!contents)
- return NULL;
- return translate_text_to_tstr(contents, num_bytes, num_tchars_ret);
-}
-
-static tchar *
-stdin_get_text_contents(size_t *num_tchars_ret)
-{
- char *contents;
- size_t num_bytes;
-
- contents = stdin_get_contents(&num_bytes);
- if (!contents)
- return NULL;
- return translate_text_to_tstr(contents, num_bytes, num_tchars_ret);
-}
-
projects / wimlib / commitdiff