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/*
* TSM - Unicode Handling
*
* Copyright (c) 2011-2012 David Herrmann <dh.herrmann@googlemail.com>
* Copyright (c) 2011 University of Tuebingen
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* Unicode Helpers
* This file provides small helpers to make working with Unicode/UTF8/UCS4 input
* and output much easier.
*/
#ifndef TSM_UNICODE_H
#define TSM_UNICODE_H
#include <inttypes.h>
#include <stdlib.h>
/* UCS4 helpers */
#define TSM_UCS4_MAX (0x7fffffffUL)
#define TSM_UCS4_INVALID (TSM_UCS4_MAX + 1)
#define TSM_UCS4_REPLACEMENT (0xfffdUL)
#define TSM_UCS4_MAXLEN 10
/* symbols */
struct tsm_symbol_table;
typedef uint32_t tsm_symbol_t;
extern const tsm_symbol_t tsm_symbol_default;
int tsm_symbol_table_new(struct tsm_symbol_table **out);
void tsm_symbol_table_ref(struct tsm_symbol_table *tbl);
void tsm_symbol_table_unref(struct tsm_symbol_table *tbl);
tsm_symbol_t tsm_symbol_make(uint32_t ucs4);
tsm_symbol_t tsm_symbol_append(struct tsm_symbol_table *tbl,
tsm_symbol_t sym, uint32_t ucs4);
const uint32_t *tsm_symbol_get(struct tsm_symbol_table *tbl,
tsm_symbol_t *sym, size_t *size);
unsigned int tsm_symbol_get_width(struct tsm_symbol_table *tbl,
tsm_symbol_t sym);
/* ucs4 to utf8 converter */
unsigned int tsm_ucs4_get_width(uint32_t ucs4);
size_t tsm_ucs4_to_utf8(uint32_t ucs4, char *out);
char *tsm_ucs4_to_utf8_alloc(const uint32_t *ucs4, size_t len, size_t *len_out);
/* utf8 state machine */
struct tsm_utf8_mach;
enum tsm_utf8_mach_state {
TSM_UTF8_START,
TSM_UTF8_ACCEPT,
TSM_UTF8_REJECT,
TSM_UTF8_EXPECT1,
TSM_UTF8_EXPECT2,
TSM_UTF8_EXPECT3,
};
int tsm_utf8_mach_new(struct tsm_utf8_mach **out);
void tsm_utf8_mach_free(struct tsm_utf8_mach *mach);
int tsm_utf8_mach_feed(struct tsm_utf8_mach *mach, char c);
uint32_t tsm_utf8_mach_get(struct tsm_utf8_mach *mach);
void tsm_utf8_mach_reset(struct tsm_utf8_mach *mach);
#endif /* TSM_UNICODE_H */
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