94 lines
2.8 KiB
C
94 lines
2.8 KiB
C
#include "../core.h"
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#include "utf.h"
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static i8 utf8lenb(u8 ch) {
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if (ch<128) return 1;
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if ((ch>>5)== 0b110) return 2;
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if ((ch>>4)== 0b1110) return 3;
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if ((ch>>3)==0b11110) return 4;
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return -1;
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}
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static u32 utf8_p(u8* p) {
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i32 len = utf8lenb(*p);
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switch (len) { default: UD;
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case -1: return (u32)-1;
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case 1: return *p;
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case 2: return (0b11111u&*p)<< 6 | (0b111111u&p[1]);
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case 3: return (0b1111u &*p)<<12 | (0b111111u&p[2]) | (0b111111u&p[1])<<6;
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case 4: return (0b111u &*p)<<18 | (0b111111u&p[3]) | (0b111111u&p[2])<<6 | (0b111111u&p[1])<<12;
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}
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}
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B fromUTF8(char* s, i64 len) {
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u64 sz = 0;
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i64 j = 0;
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while (true) {
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if (j>=len) {
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if (j!=len) thrM("Invalid UTF-8");
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break;
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}
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i8 l = utf8lenb((u8)s[j]);
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if (l==-1) thrM("Invalid UTF-8");
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// TODO validate unicode or something
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sz++;
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j+= l;
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}
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if (sz==len) {
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u8* rp; B r = m_c8arrv(&rp, sz);
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for (i64 i = 0; i < len; i++) rp[i] = s[i];
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return r;
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} else {
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u32* rp; B r = m_c32arrv(&rp, sz);
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u64 p = 0;
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for (i64 i = 0; i < len; i+= utf8lenb((u8)s[i])) rp[p++] = utf8_p((u8*)s+i); // may read after end, eh
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return r;
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}
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}
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B fromUTF8l(char* s) {
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return fromUTF8(s, strlen(s));
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}
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B fromUTF8a(I8Arr* a) { // consumes a
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B r = fromUTF8((char*)a->a, a->ia);
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ptr_dec(a);
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return r;
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}
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void printUTF8(u32 c) {
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if (c<128) printf("%c", c);
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else if (c<=0x07FF) printf("%c%c" , 0xC0| c>>6 , 0x80|(c &0x3F) );
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else if (c<=0xFFFF) printf("%c%c%c" , 0xE0| c>>12, 0x80|(c>>6 &0x3F), 0x80|(c &0x3F) );
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else printf("%c%c%c%c", 0xF0| c>>18, 0x80|(c>>12&0x3F), 0x80|(c>>6&0x3F), 0x80|(c&0x3F));
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}
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void fprintUTF8(FILE* f, u32 c) {
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if (c<128) fprintf(f, "%c", c);
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else if (c<=0x07FF) fprintf(f, "%c%c" , 0xC0| c>>6 , 0x80|(c &0x3F) );
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else if (c<=0xFFFF) fprintf(f, "%c%c%c" , 0xE0| c>>12, 0x80|(c>>6 &0x3F), 0x80|(c &0x3F) );
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else fprintf(f, "%c%c%c%c", 0xF0| c>>18, 0x80|(c>>12&0x3F), 0x80|(c>>6&0x3F), 0x80|(c&0x3F));
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}
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u64 utf8lenB(B x) { // doesn't consume; may error as it verifies whether is all chars
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assert(isArr(x));
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SGetU(x)
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usz ia = a(x)->ia;
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u64 res = 0;
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for (usz i = 0; i < ia; i++) {
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u32 c = o2c(GetU(x,i));
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res+= c<128? 1 : c<0x07FF? 2 : c<0xFFFF? 3 : 4;
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}
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return res;
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}
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void toUTF8(B x, char* p) {
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SGetU(x)
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usz ia = a(x)->ia;
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for (usz i = 0; i < ia; i++) {
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u32 c = o2cu(GetU(x,i));
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if (c<128) { *p++ = c; }
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else if (c<=0x07FF) { *p++ = 0xC0|c>>6 ; *p++ = 0x80|(c &0x3F); }
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else if (c<=0xFFFF) { *p++ = 0xE0|c>>12; *p++ = 0x80|(c>>6 &0x3F);*p++ = 0x80|(c &0x3F); }
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else { *p++ = 0xF0|c>>18; *p++ = 0x80|(c>>12&0x3F);*p++ = 0x80|(c>>6&0x3F); *p++ = 0x80|(c&0x3F); }
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}
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}
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