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Improve backwards compatibility with GNU Make

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This commit is contained in:
Justine Tunney 2021-05-02 07:48:59 -07:00
parent fabf7f9f02
commit 1f2288be6e
18 changed files with 412 additions and 96 deletions
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6
libc/stdio/getdelim.c
View file

@ -33,10 +33,10 @@
* allocated automatically, also NUL-terminated is guaranteed
* @param n is the capacity of s (in/out)
* @param delim is the stop char (and NUL is implicitly too)
* @return number of bytes read, including delim, excluding NUL, or -1
* w/ errno on EOF or error; see ferror() and feof()
* @return number of bytes read >0, including delim, excluding NUL,
* or -1 w/ errno on EOF or error; see ferror() and feof()
* @note this function can't punt EINTR to caller
* @see getline(), gettok_r()
* @see getline(), chomp(), gettok_r()
*/
ssize_t getdelim(char **s, size_t *n, int delim, FILE *f) {
char *p;

10
libc/str/strchr.c
View file

@ -17,16 +17,14 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/assert.h"
#include "libc/bits/bits.h"
#include "libc/str/str.h"
noasan static const unsigned char *strchr_x64(const unsigned char *p,
uint64_t c) {
noasan static const char *strchr_x64(const char *p, uint64_t c) {
unsigned a, b;
uint64_t w, x, y;
for (c *= 0x0101010101010101;; p += 8) {
w = (uint64_t)p[7] << 070 | (uint64_t)p[6] << 060 | (uint64_t)p[5] << 050 |
(uint64_t)p[4] << 040 | (uint64_t)p[3] << 030 | (uint64_t)p[2] << 020 |
(uint64_t)p[1] << 010 | (uint64_t)p[0] << 000;
w = READ64LE(p);
if ((x = ~(w ^ c) & ((w ^ c) - 0x0101010101010101) & 0x8080808080808080) |
(y = ~w & (w - 0x0101010101010101) & 0x8080808080808080)) {
if (x) {
@ -63,7 +61,7 @@ char *strchr(const char *s, int c) {
if ((*s & 0xff) == c) return s;
if (!*s) return NULL;
}
r = (char *)strchr_x64((const unsigned char *)s, c);
r = strchr_x64(s, c);
assert(!r || *r || !c);
return r;
}

3
libc/str/strstr.c
View file

@ -16,6 +16,7 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/bits/safemacros.internal.h"
#include "libc/str/str.h"
/**
@ -29,6 +30,8 @@
*/
char *strstr(const char *haystack, const char *needle) {
size_t i;
if (!*needle) return haystack;
haystack = firstnonnull(strchr(haystack, *needle), haystack);
for (;;) {
for (i = 0;;) {
if (!needle[i]) return (/*unconst*/ char *)haystack;

3
libc/str/tprecode16to8.c
View file

@ -49,6 +49,9 @@ static noasan axdx_t tprecode16to8_sse2(char *dst, size_t dstsize,
/**
* Transcodes UTF-16 to UTF-8.
*
* This is a low-level function intended for the core runtime. Use
* utf16toutf8() for a much better API that uses malloc().
*
* @param dst is output buffer
* @param dstsize is bytes in dst
* @param src is NUL-terminated UTF-16 input string

3
libc/str/tprecode8to16.c
View file

@ -46,6 +46,9 @@ static inline noasan axdx_t tprecode8to16_sse2(char16_t *dst, size_t dstsize,
/**
* Transcodes UTF-8 to UTF-16.
*
* This is a low-level function intended for the core runtime. Use
* utf8toutf16() for a much better API that uses malloc().
*
* @param dst is output buffer
* @param dstsize is shorts in dst
* @param src is NUL-terminated UTF-8 input string

91
libc/x/utf16toutf8.c Normal file
View file

@ -0,0 +1,91 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/bits/bits.h"
#include "libc/intrin/packsswb.h"
#include "libc/intrin/pandn.h"
#include "libc/intrin/pcmpgtb.h"
#include "libc/intrin/pcmpgtw.h"
#include "libc/intrin/pmovmskb.h"
#include "libc/intrin/punpckhbw.h"
#include "libc/intrin/punpcklbw.h"
#include "libc/mem/mem.h"
#include "libc/nexgen32e/bsr.h"
#include "libc/str/str.h"
#include "libc/str/thompike.h"
#include "libc/str/tpenc.h"
#include "libc/str/utf16.h"
#include "libc/x/x.h"
static const int16_t kDel16[8] = {127, 127, 127, 127, 127, 127, 127, 127};
/**
* Transcodes UTF-16 to UTF-8.
*
* @param p is input value
* @param n if -1 implies strlen
* @param z if non-NULL receives output length
*/
char *utf16toutf8(const char16_t *p, size_t n, size_t *z) {
char *r, *q;
wint_t x, y;
unsigned m, j, w;
const char16_t *e;
int16_t v1[8], v2[8], v3[8], vz[8];
if (z) *z = 0;
if (n == -1) n = p ? strlen16(p) : 0;
if ((q = r = malloc(n * 4 + 8 + 1))) {
for (e = p + n; p < e;) {
if (p + 8 < e) { /* 17x ascii */
memset(vz, 0, 16);
do {
memcpy(v1, p, 16);
pcmpgtw(v2, v1, vz);
pcmpgtw(v3, v1, kDel16);
pandn((void *)v2, (void *)v3, (void *)v2);
if (pmovmskb((void *)v2) != 0xFFFF) break;
packsswb((void *)v1, v1, v1);
memcpy(q, v1, 8);
p += 8;
q += 8;
} while (p + 8 < e);
}
x = *p++ & 0xffff;
if (!IsUcs2(x)) {
if (p < e) {
y = *p++ & 0xffff;
x = MergeUtf16(x, y);
} else {
x = 0xFFFD;
}
}
if (x < 0200) {
*q++ = x;
} else {
w = tpenc(x);
WRITE64LE(q, w);
q += bsr(w) >> 3;
q += 1;
}
}
if (z) *z = q - r;
*q++ = '\0';
if ((q = realloc(r, (q - r) * 1))) r = q;
}
return r;
}

86
libc/x/utf8toutf16.c Normal file
View file

@ -0,0 +1,86 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/intrin/pcmpgtb.h"
#include "libc/intrin/pmovmskb.h"
#include "libc/intrin/punpckhbw.h"
#include "libc/intrin/punpcklbw.h"
#include "libc/mem/mem.h"
#include "libc/str/str.h"
#include "libc/str/thompike.h"
#include "libc/str/utf16.h"
#include "libc/x/x.h"
/**
* Transcodes UTF-8 to UTF-16.
*
* @param p is input value
* @param n if -1 implies strlen
* @param z if non-NULL receives output length
*/
char16_t *utf8toutf16(const char *p, size_t n, size_t *z) {
size_t i;
wint_t x, a, b;
char16_t *r, *q;
unsigned m, j, w;
uint8_t v1[16], v2[16], vz[16];
if (z) *z = 0;
if (n == -1) n = p ? strlen(p) : 0;
if ((q = r = malloc(n * sizeof(char16_t) * 2 + sizeof(char16_t)))) {
for (i = 0; i < n;) {
if (i + 16 < n) { /* 34x ascii */
memset(vz, 0, 16);
do {
memcpy(v1, p + i, 16);
pcmpgtb((int8_t *)v2, (int8_t *)v1, (int8_t *)vz);
if (pmovmskb(v2) != 0xFFFF) break;
punpcklbw(v2, v1, vz);
punpckhbw(v1, v1, vz);
memcpy(q + 0, v2, 16);
memcpy(q + 8, v1, 16);
i += 16;
q += 16;
} while (i + 16 < n);
}
x = p[i++] & 0xff;
if (x >= 0300) {
a = ThomPikeByte(x);
m = ThomPikeLen(x) - 1;
if (i + m <= n) {
for (j = 0;;) {
b = p[i + j] & 0xff;
if (!ThomPikeCont(b)) break;
a = ThomPikeMerge(a, b);
if (++j == m) {
x = a;
i += j;
break;
}
}
}
}
w = EncodeUtf16(x);
*q++ = w;
if ((w >>= 16)) *q++ = w;
}
if (z) *z = q - r;
*q++ = '\0';
if ((q = realloc(r, (q - r) * sizeof(char16_t)))) r = q;
}
return r;
}

2
libc/x/x.h
View file

@ -51,6 +51,8 @@ char *xstrmul(const char *, size_t) paramsnonnull((1)) _XMAL;
char *xinet_ntop(int, const void *) _XPNN _XMAL;
void *xunbinga(size_t, const char16_t *) attributeallocalign((1)) _XMAL _XRET;
void *xunbing(const char16_t *) _XMAL _XRET;
char16_t *utf8toutf16(const char *, size_t, size_t *) nodiscard;
char *utf16toutf8(const char16_t *, size_t, size_t *) nodiscard;
/*───────────────────────────────────────────────────────────────────────────│─╗
│ cosmopolitan § eXtended apis » files ─╬─│┼

18
libc/x/xgetline.c
View file

@ -25,16 +25,18 @@
*
* @return allocated line that needs free() and usually chomp() too,
* or NULL on ferror() or feof()
* @see getline() for a more difficult api
* @see getdelim() for a more difficult api
* @see chomp()
*/
char *xgetline(FILE *f) {
char *res;
size_t n, got;
char *p;
size_t n;
ssize_t m;
n = 0;
res = NULL;
if ((got = getdelim(&res, &n, '\n', f)) <= 0) {
free(res);
res = NULL;
p = 0;
if ((m = getdelim(&p, &n, '\n', f)) <= 0) {
free(p);
p = 0;
}
return res;
return p;
}