ref: 76af4ec0e6d869e8ccc2757904375daf6470bd92
dir: /gui-win32/r16.c/
#define _WIN32_WINNT 0x0500 #include <windows.h> #include "u.h" #include "lib.h" #include "r16.h" #define Bit(i) (7-(i)) /* N 0's preceded by i 1's, T(Bit(2)) is 1100 0000 */ #define T(i) (((1 << (Bit(i)+1))-1) ^ 0xFF) /* 0000 0000 0000 0111 1111 1111 */ #define RuneX(i) ((1 << (Bit(i) + ((i)-1)*Bitx))-1) enum { Bitx = Bit(1), Tx = T(1), /* 1000 0000 */ Rune1 = (1<<(Bit(0)+0*Bitx))-1, /* 0000 0000 0000 0000 0111 1111 */ Maskx = (1<<Bitx)-1, /* 0011 1111 */ Testx = Maskx ^ 0xFF, /* 1100 0000 */ SurrogateMin = 0xD800, SurrogateMax = 0xDFFF, Bad = Runeerror, }; Rune16* runes16dup(Rune16 *r) { int n; Rune16 *s; n = runes16len(r) + 1; s = malloc(n * sizeof(Rune16)); memmove(s, r, n * sizeof(Rune16)); return s; } int runes16len(Rune16 *r) { int n; n = 0; while(*r++ != 0) n++; return n; } char* runes16toutf(char *p, Rune16 *r, int nc) { char *op, *ep; int n, c; Rune rc; op = p; ep = p + nc; while(c = *r++) { n = 1; if(c >= Runeself) n = runelen(c); if(p + n >= ep) break; rc = c; if(c < Runeself) *p++ = c; else p += runetochar(p, &rc); } *p = '\0'; return op; } int rune16nlen(Rune16 *r, int nrune) { int nb, i; Rune c; nb = 0; while(nrune--) { c = *r++; if(c <= Rune1){ nb++; } else { for(i = 2; i < UTFmax + 1; i++) if(c <= RuneX(i) || i == UTFmax){ nb += i; break; } } } return nb; } Rune16* utftorunes16(Rune16 *r, char *p, int nc) { Rune16 *or, *er; Rune rc; or = r; er = r + nc; while(*p != '\0' && r + 1 < er){ p += chartorune(&rc, p); *r++ = rc; /* we'll ignore surrogate pairs */ } *r = '\0'; return or; } int runes16cmp(Rune16 *s1, Rune16 *s2) { Rune16 r1, r2; for(;;) { r1 = *s1++; r2 = *s2++; if(r1 != r2) { if(r1 > r2) return 1; return -1; } if(r1 == 0) return 0; } } wchar_t * widen(char *s) { int n; wchar_t *ws; n = utflen(s) + 1; ws = malloc(n*sizeof(wchar_t)); utftorunes16(ws, s, n); return ws; } char * narrowen(wchar_t *ws) { char *s; int n; n = widebytes(ws); s = malloc(n); runes16toutf(s, ws, n); return s; } int widebytes(wchar_t *ws) { int n = 0; while (*ws) n += runelen(*ws++); return n+1; }