diff options
Diffstat (limited to 'sdk-modifications/libsrc/fs/fs_unicode.c')
| -rwxr-xr-x | sdk-modifications/libsrc/fs/fs_unicode.c | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/sdk-modifications/libsrc/fs/fs_unicode.c b/sdk-modifications/libsrc/fs/fs_unicode.c new file mode 100755 index 0000000..2f1c1ed --- /dev/null +++ b/sdk-modifications/libsrc/fs/fs_unicode.c @@ -0,0 +1,173 @@ +//fs_unicode.c + +#include <string.h>
+#include "fs_common.h"
+
+//void _FAT_unicode_init_default() // ANSI CODE PAGE
+//{
+// _L2UTable = NULL;
+// _U2LTable = NULL;
+// _ankTable = NULL;
+//}
+
+static inline const char* _FAT_utf8decode(const char* utf8, u16 *ucs)
+{
+ unsigned char c = *utf8++;
+ unsigned long code;
+ int tail = 0;
+
+ if ((c <= 0x7f) || (c >= 0xc2)) {
+ /* Start of new character. */
+ if (c < 0x80) { /* U-00000000 - U-0000007F, 1 byte */
+ code = c;
+ } else if (c < 0xe0) { /* U-00000080 - U-000007FF, 2 bytes */
+ tail = 1;
+ code = c & 0x1f;
+ } else if (c < 0xf0) { /* U-00000800 - U-0000FFFF, 3 bytes */
+ tail = 2;
+ code = c & 0x0f;
+ } else if (c < 0xf5) { /* U-00010000 - U-001FFFFF, 4 bytes */
+ tail = 3;
+ code = c & 0x07;
+ } else {
+ /* Invalid size. */
+ code = 0;
+ }
+
+ while (tail-- && ((c = *utf8++) != 0)) {
+ if ((c & 0xc0) == 0x80) {
+ /* Valid continuation character. */
+ code = (code << 6) | (c & 0x3f);
+
+ } else {
+ /* Invalid continuation char */
+ code = 0xfffd;
+ utf8--;
+ break;
+ }
+ }
+ } else {
+ /* Invalid UTF-8 char */
+ code = 0;
+ }
+ /* currently we don't support chars above U-FFFF */
+ *ucs = (code < 0x10000) ? code : 0;
+ return utf8;
+}
+
+void _FAT_utf8_to_unicode16( const char* src, unsigned short* dest )
+{
+ while('\0' != *src)
+ {
+ src = _FAT_utf8decode(src, dest++); + } +
+ *dest = '\0';
+}
+
+#if 0
+static inline int _FAT_utf8coding(const u16* ucs, char* dest)
+{
+ int len= 0;
+
+ if (*ucs < 0x80) //one byte
+ {
+ dest[len++] = *ucs;
+ }
+ else if (*ucs < 0x800) //two bytes
+ {
+ dest[len++] = 0xC0 | (*ucs >> 6 & 0x1F);
+ dest[len++] = 0x80 | (*ucs & 0x3F);
+ }
+ else //if(*ucs < 0x10000) //three bytes
+ {
+ dest[len++] = 0xE0 | (*ucs >> 12);
+ dest[len++] = 0x80 | (*ucs >>6 & 0x3F);
+ dest[len++] = 0x80 | (*ucs &0x3F);
+ }
+
+ return len;
+}
+#endif
+
+void _FAT_unicode16_to_utf8( const u16* src, char* dest)
+{
+ int len=0;
+ while(*src)
+ {
+ if (*src < 0x80) //1 byte
+ {
+ dest[len++] = *src;
+ }
+ else if (*src < 0x800) //2 bytes
+ {
+ dest[len++] = 0xC0 | (*src >> 6 & 0x1F);
+ dest[len++] = 0x80 | (*src & 0x3F);
+ }
+ else //if(*src < 0x10000) //3 bytes
+ {
+ dest[len++] = 0xE0 | (*src >> 12);
+ dest[len++] = 0x80 | (*src >>6 & 0x3F);
+ dest[len++] = 0x80 | (*src &0x3F);
+ }
+ src ++;
+ }
+ dest[len] = 0;
+}
+
+u32 _unistrnlen( const u16* unistr, u32 maxlen )
+{
+ const u16 * pstr = NULL;
+ u32 len = 0;
+ if( NULL == unistr )
+ return 0;
+
+ if( 0 == maxlen )
+ return 0;
+
+ pstr = unistr;
+
+ while( len < maxlen && *pstr != 0x0000 )
+ {
+ ++len;
+ ++pstr;
+ }
+ return len;
+}
+
+int _unistrncmp( const u16* src, const u16* dest, u32 maxlen )
+{
+ if( NULL == src || NULL == dest )
+ {
+ if( src == dest ) return 0;
+ return (NULL == src ) ? -1 : 1;
+ }
+
+ while( *src == *dest && maxlen && *src != 0x0000 && *dest != 0x0000 )
+ {
+ ++src;
+ ++dest;
+ --maxlen;
+ }
+ if( 0 == maxlen ) return 0;
+
+ return *src > *dest ? 1 : -1;
+}
+
+const u16 * _unistrchr( const u16 * str, u16 unichar )
+{
+ if( NULL == str )
+ return NULL;
+
+ while( *str != unichar && *str != 0x0000 )
+ {
+ ++str;
+ }
+ return str;
+}
+
+int _uniisalnum( u8 ch )
+{
+ return isalnum( ch );
+}
+
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