1#include "stdio_impl.h" 2#include "intscan.h" 3#include "shgetc.h" 4#include <inttypes.h> 5#include <limits.h> 6#include <wctype.h> 7#include <wchar.h> 8 9/* This read function heavily cheats. It knows: 10 * (1) len will always be 1 11 * (2) non-ascii characters don't matter */ 12 13static size_t do_read(FILE *f, unsigned char *buf, size_t len) 14{ 15 size_t i; 16 const wchar_t *wcs = f->cookie; 17 18 if (!wcs[0]) wcs=L"@"; 19 for (i=0; i<f->buf_size && wcs[i]; i++) 20 f->buf[i] = wcs[i] < 128 ? wcs[i] : '@'; 21 f->rpos = f->buf; 22 f->rend = f->buf + i; 23 f->cookie = (void *)(wcs+i); 24 25 if (i && len) { 26 *buf = *f->rpos++; 27 return 1; 28 } 29 return 0; 30} 31 32static unsigned long long wcstox(const wchar_t *s, wchar_t **p, int base, unsigned long long lim) 33{ 34 wchar_t *t = (wchar_t *)s; 35 unsigned char buf[64]; 36 FILE f = {0}; 37 f.flags = 0; 38 f.rpos = f.rend = f.buf = buf + 4; 39 f.buf_size = sizeof buf - 4; 40 f.lock = -1; 41 f.read = do_read; 42 while (iswspace(*t)) t++; 43 f.cookie = (void *)t; 44 shlim(&f, 0); 45 unsigned long long y = __intscan(&f, base, 1, lim); 46 if (p) { 47 size_t cnt = shcnt(&f); 48 *p = cnt ? t + cnt : (wchar_t *)s; 49 } 50 return y; 51} 52 53unsigned long long wcstoull(const wchar_t *restrict s, wchar_t **restrict p, int base) 54{ 55 return wcstox(s, p, base, ULLONG_MAX); 56} 57 58long long wcstoll(const wchar_t *restrict s, wchar_t **restrict p, int base) 59{ 60 return wcstox(s, p, base, LLONG_MIN); 61} 62 63unsigned long wcstoul(const wchar_t *restrict s, wchar_t **restrict p, int base) 64{ 65 return wcstox(s, p, base, ULONG_MAX); 66} 67 68long wcstol(const wchar_t *restrict s, wchar_t **restrict p, int base) 69{ 70 return wcstox(s, p, base, 0UL+LONG_MIN); 71} 72 73intmax_t wcstoimax(const wchar_t *restrict s, wchar_t **restrict p, int base) 74{ 75 return wcstoll(s, p, base); 76} 77 78uintmax_t wcstoumax(const wchar_t *restrict s, wchar_t **restrict p, int base) 79{ 80 return wcstoull(s, p, base); 81} 82