ref: 2923137ef047b401d560766537782f60e67f9a0c
dir: /tiny/flutils.c/
u_int32_t *bitvector_resize(u_int32_t *b, size_t n) { u_int32_t *p; size_t sz = ((n+31)>>5) * 4; p = realloc(b, sz); if (p == NULL) return NULL; memset(p, 0, sz); return p; } u_int32_t *mk_bitvector(size_t n) { return bitvector_resize(NULL, n); } void bitvector_set(u_int32_t *b, u_int32_t n, u_int32_t c) { if (c) b[n>>5] |= (1<<(n&31)); else b[n>>5] &= ~(1<<(n&31)); } u_int32_t bitvector_get(u_int32_t *b, u_int32_t n) { return b[n>>5] & (1<<(n&31)); } typedef struct { size_t n, maxsize; unsigned long *items; } ltable_t; void ltable_init(ltable_t *t, size_t n) { t->n = 0; t->maxsize = n; t->items = (unsigned long*)malloc(n * sizeof(unsigned long)); } void ltable_clear(ltable_t *t) { t->n = 0; } void ltable_insert(ltable_t *t, unsigned long item) { unsigned long *p; if (t->n == t->maxsize) { p = realloc(t->items, (t->maxsize*2)*sizeof(unsigned long)); if (p == NULL) return; t->items = p; t->maxsize *= 2; } t->items[t->n++] = item; } #define NOTFOUND ((int)-1) int ltable_lookup(ltable_t *t, unsigned long item) { int i; for(i=0; i < (int)t->n; i++) if (t->items[i] == item) return i; return NOTFOUND; } void ltable_adjoin(ltable_t *t, unsigned long item) { if (ltable_lookup(t, item) == NOTFOUND) ltable_insert(t, item); } static const u_int32_t offsetsFromUTF8[6] = { 0x00000000UL, 0x00003080UL, 0x000E2080UL, 0x03C82080UL, 0xFA082080UL, 0x82082080UL }; static const char trailingBytesForUTF8[256] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 3,3,3,3,3,3,3,3,4,4,4,4,5,5,5,5 }; int u8_seqlen(const char c) { return trailingBytesForUTF8[(unsigned int)(unsigned char)c] + 1; } #define UEOF ((u_int32_t)EOF) u_int32_t u8_fgetc(FILE *f) { int amt=0, sz, c; u_int32_t ch=0; c = fgetc(f); if (c == EOF) return UEOF; ch = (u_int32_t)c; amt = sz = u8_seqlen(ch); while (--amt) { ch <<= 6; c = fgetc(f); if (c == EOF) return UEOF; ch += (u_int32_t)c; } ch -= offsetsFromUTF8[sz-1]; return ch; }