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d7662562eebb35edb6a415e372c49733e866cfd2 blob 1906 bytes (raw)

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#include "stdio_impl.h"
#include "intscan.h"
#include "shgetc.h"
#include <inttypes.h>
#include <limits.h>
#include <wctype.h>
#include <wchar.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 unsigned long long wcstox(const wchar_t *s, wchar_t **p, int base, uwide128 lim)
{
	wchar_t *t = (wchar_t *)s;
	unsigned char buf[64];
	FILE f = {0};
	f.flags = 0;
	f.rpos = f.rend = 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);
	unsigned long long y = __intscan(&f, base, 1, lim).v64[lo64];
	if (p) {
		size_t cnt = shcnt(&f);
		*p = cnt ? t + cnt : (wchar_t *)s;
	}
	return y;
}

unsigned long long wcstoull(const wchar_t *restrict s, wchar_t **restrict p, int base)
{
	return wcstox(s, p, base, __uwide128_u64(ULLONG_MAX));
}

long long wcstoll(const wchar_t *restrict s, wchar_t **restrict p, int base)
{
	return wcstox(s, p, base, __uwide128_u64(0ULL+LLONG_MIN));
}

unsigned long wcstoul(const wchar_t *restrict s, wchar_t **restrict p, int base)
{
	return wcstox(s, p, base, __uwide128_u64(ULONG_MAX));
}

long wcstol(const wchar_t *restrict s, wchar_t **restrict p, int base)
{
	return wcstox(s, p, base, __uwide128_u64(0UL+LONG_MIN));
}

intmax_t wcstoimax(const wchar_t *restrict s, wchar_t **restrict p, int base)
{
	return wcstoll(s, p, base);
}

uintmax_t wcstoumax(const wchar_t *restrict s, wchar_t **restrict p, int base)
{
	return wcstoull(s, p, base);
}
debug log:

solving d7662562 ...
found d7662562 in https://inbox.vuxu.org/musl/dd59ed3a123143ef91cf4a459a79cf5713ad0d15.1685536608.git.Jens.Gustedt@inria.fr/
found 1eeb495f in https://git.vuxu.org/mirror/musl/
preparing index
index prepared:
100644 1eeb495fd6eaf2da6b44bae57bfcfd5512b1c838	src/stdlib/wcstol.c

applying [1/1] https://inbox.vuxu.org/musl/dd59ed3a123143ef91cf4a459a79cf5713ad0d15.1685536608.git.Jens.Gustedt@inria.fr/
diff --git a/src/stdlib/wcstol.c b/src/stdlib/wcstol.c
index 1eeb495f..d7662562 100644

Checking patch src/stdlib/wcstol.c...
Applied patch src/stdlib/wcstol.c cleanly.

index at:
100644 d7662562eebb35edb6a415e372c49733e866cfd2	src/stdlib/wcstol.c

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