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unicode-support.c
248 lines (240 loc) · 11.7 KB
/
unicode-support.c
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#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <libooc/string.conflict.h>
#include <libooc/file.h>
// gcc -std=gnu99 -I. -I.. -I/usr/local/include/libooc-0.0.1 -g -O0 -c % && gcc -std=gnu99 -g -O0 -o %:r %:r.o -L/usr/local/lib -looc-0.0.1
static void
init(void) {
String_init();
File_init();
}
// 0zzz zzzz
// 000 0000 ( 0) to
// 111 1111 ( 7F)
// 110y yyyy 10zz zzzz
// 0 0010 00 0000 ( 80) to
// 1 1111 11 1111 ( 7FF)
// 1110 xxxx 10yy yyyy 10zz zzzz
// 0000 10 0000 00 0000 ( 800) to
// 0000 11 1111 11 1111 ( FFF)
// 0001 00 0000 00 0000 ( 1000) to
// 1100 11 1111 11 1111 ( CFFF)
// 1101 00 0000 00 0000 ( D000) to
// 1101 01 1111 11 1111 ( D7FF)
// 1110 00 0000 00 0000 ( E000) to
// 1111 11 1111 11 1111 ( FFFF)
// 1111 0www 10xx xxxx 10yy yyyy 10zz zzzz
// 000 01 0000 00 0000 00 0000 ( 10000) to
// 000 11 1111 11 1111 11 1111 ( 1FFFF)
// 001 00 0000 00 0000 00 0000 ( 20000) to
// 011 11 1111 11 1111 11 1111 ( FFFFF)
// 100 00 0000 00 0000 00 0000 (100000) to
// 100 00 1111 11 1111 11 1111 (10FFFF)
//
// transition digram(state 0 to 7):
// 0 [00-7F] ( 0 to 7F)
// 0 [C2-DF] 1 [80-BF] ( 80 to 7FF)
// 0 E0 2 [A0-BF] 1 [80-BF] ( 800 to FFF)
// 0 [E1-EC] 3 [80-BF] 1 [80-BF] ( 1000 to CFFF)
// 0 ED 4 [80-9F] 1 [80-BF] ( D000 to D7FF)
// 0 [EE-EF] 3 [80-BF] 1 [80-BF] ( E000 to FFFF)
// 0 F0 5 [90-BF] 3 [80-BF] 1 [80-BF] ( 10000 to 1FFFF)
// 0 [F1-F3] 6 [80-BF] 3 [80-BF] 1 [80-BF] ( 20000 to FFFFF)
// 0 F4 7 [80-8F] 3 [80-BF] 1 [80-BF] (100000 to 10FFFF)
enum state {
ACCEPT = -2, // accept
FAILURE // failure
};
#define A ACCEPT
#define F FAILURE
static int trans[8][256] = {
{ // state 0
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
/* 0 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* 1 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* 2 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* 3 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* 4 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* 5 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* 6 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* 7 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* 8 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 9 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* F */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* B */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* C */ F, F, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
/* D */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
/* E */ 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 3, 3,
/* F */ 5, 6, 6, 6, 7, F, F, F, F, F, F, F, F, F, F, F
},
{ // state 1
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
/* 0 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 1 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 2 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 3 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 4 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 5 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 6 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 7 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 8 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* 9 */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* A */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* B */ A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,
/* C */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* D */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* E */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* F */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F
},
{ // state 2
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
/* 0 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 1 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 2 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 3 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 4 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 5 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 6 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 7 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 8 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 9 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* A */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
/* B */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
/* C */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* D */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* E */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* F */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F
},
{ // state 3
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
/* 0 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 1 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 2 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 3 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 4 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 5 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 6 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 7 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 8 */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
/* 9 */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
/* A */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
/* B */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
/* C */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* D */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* E */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* F */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F
},
{ // state 4
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
/* 0 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 1 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 2 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 3 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 4 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 5 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 6 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 7 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 8 */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
/* 9 */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
/* A */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* B */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* C */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* D */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* E */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* F */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F
},
{ // state 5
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
/* 0 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 1 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 2 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 3 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 4 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 5 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 6 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 7 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 8 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 9 */ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
/* A */ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
/* B */ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
/* C */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* D */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* E */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* F */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F
},
{ // state 6
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
/* 0 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 1 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 2 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 3 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 4 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 5 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 6 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 7 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 8 */ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
/* 9 */ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
/* A */ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
/* B */ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
/* C */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* D */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* E */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* F */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F
},
{ // state 7
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
/* 0 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 1 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 2 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 3 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 4 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 5 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 6 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 7 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* 8 */ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
/* 9 */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* A */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* B */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* C */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* D */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* E */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F,
/* F */ F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F
}
};
static size_t
utf8_char_len(uint8_t * p) {
size_t len = 0;
int state = 0;
while(true) {
printf("state %d, char %02X\n", state, * p);
state = trans[state][* p];
p += 1;
len += 1;
switch(state) {
case ACCEPT:
return len;
case FAILURE:
return 0;
}
};
}
int
main(void) {
init();
void * input = new(File, "./utf8-example");
void * content = File_read(input);
uint8_t * string = Object_inspect(content);
printf("[%s]\n", string);
uint8_t buffer[30];
buffer[0] = '\0';
size_t len = strlen(string);
size_t n;
for(int i = 0; i < len; i += n) {
n = utf8_char_len(string + i);
strncpy(buffer, string + i, n);
buffer[n] = '\0';
printf("[%s]\n", buffer);
}
return 0;
}