Loading...
#include "shgetc.h" #include "floatscan.h" #include "stdio_impl.h" /* This read function heavily cheats. It knows: * (1) len will always be 1 * (2) non-ascii characters don't matter */ static size_t do_read(FILE *f, unsigned char *buf, size_t len) { size_t i; const wchar_t *wcs = f->cookie; if (!wcs[0]) wcs=L"@"; for (i=0; i<f->buf_size && wcs[i]; i++) f->buf[i] = wcs[i] < 128 ? wcs[i] : '@'; f->rpos = f->buf; f->rend = f->buf + i; f->cookie = (void *)(wcs+i); if (i && len) { *buf = *f->rpos++; return 1; } return 0; } static long double wcstox(const wchar_t *s, wchar_t **p, int prec) { wchar_t *t = (wchar_t *)s; unsigned char buf[64]; FILE f = {0}; f.flags = 0; f.rpos = f.rend = 0; f.buf = buf + 4; f.buf_size = sizeof buf - 4; f.lock = -1; f.read = do_read; while (iswspace(*t)) t++; f.cookie = (void *)t; shlim(&f, 0); long double y = __floatscan(&f, prec, 1); if (p) { size_t cnt = shcnt(&f); *p = cnt ? t + cnt : (wchar_t *)s; } return y; } float wcstof(const wchar_t *restrict s, wchar_t **restrict p) { return wcstox(s, p, 0); } double wcstod(const wchar_t *restrict s, wchar_t **restrict p) { return wcstox(s, p, 1); } long double wcstold(const wchar_t *restrict s, wchar_t **restrict p) { return wcstox(s, p, 2); } |