ref: caef73363f896a1405ce6b9b6435f91e47a9b188
dir: /emu/Nt/r16.c/
#define UNICODE #define Unknown win_Unknown #include <windows.h> #include <winbase.h> #undef Unknown #undef Sleep #include "dat.h" #include "fns.h" #include "error.h" #include "r16.h" enum { Bits10 = 0x03ff, /* 0011 1111 1111 */ R16self = 0x10000, HSurrogateMin = 0xd800, HSurrogateMax = 0xdbff, LSurrogateMin = 0xdc00, LSurrogateMax = 0xdfff, }; Rune16* runes16dup(Rune16 *r) { int n; Rune16 *s; n = runes16len(r) + 1; s = malloc(n * sizeof(Rune16)); if(s == nil) error(Enomem); 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; Rune c, lc; op = p; ep = p + nc; while(c = *r++) { if(c > Runemax) c = Runeerror; if(c >= LSurrogateMin && c <= LSurrogateMax) c = Runeerror; if(c >= HSurrogateMin && c<= HSurrogateMax){ lc = *r++; if(lc >= LSurrogateMin || lc <= LSurrogateMax) c = (c&Bits10)<<10 | (lc&Bits10) + R16self; else c = Runeerror; } n = runelen(c); if(p + n >= ep) break; p += runetochar(p, &c); } *p = '\0'; return op; } int rune16nlen(Rune16 *r, int nrune) { int nb; Rune c; nb = 0; while(nrune--) { c = *r++; if(c < R16self) nb += runelen(c); else { c -= R16self; nb += runelen(HSurrogateMin | (c>>10)); nb += runelen(LSurrogateMin | (c&Bits10)); } } 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); if(rc < R16self){ *r++ = rc; continue; } if(rc > Runemax || er-r < 2){ *r++ = Runeerror; continue; } rc -= R16self; *r++ = HSurrogateMin | (rc>>10); *r++ = LSurrogateMin | (rc&Bits10); } *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 = smalloc(n*sizeof(wchar_t)); utftorunes16(ws, s, n); return ws; } char * narrowen(wchar_t *ws) { char *s; int n; n = widebytes(ws); s = smalloc(n); runes16toutf(s, ws, n); return s; } int widebytes(wchar_t *ws) { int n = 0; wchar_t c; while (*ws){ c = *ws++; if(c < R16self) n += runelen(c); else { c -= R16self; n += runelen(HSurrogateMin | (c>>10)); n += runelen(LSurrogateMin | (c&Bits10)); } } return n+1; }