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cosmopolitan/third_party/quickjs/uri.c
Justine Tunney ae5d06dc53 Unbloat build config 
- 10.5% reduction of o//depend dependency graph
- 8.8% reduction in latency of make command
- Fix issue with temporary file cleanup

There's a new -w option in compile.com that turns off the recent
Landlock output path workaround for "good commands" which do not
unlink() the output file like GNU tooling does.

Our new GNU Make unveil sandboxing appears to have zero overhead
in the grand scheme of things. Full builds are pretty fast since
the only thing that's actually slowed us down is probably libcxx

    make -j16 MODE=rel
    RL: took 85,732,063µs wall time
    RL: ballooned to 323,612kb in size
    RL: needed 828,560,521µs cpu (11% kernel)
    RL: caused 39,080,670 page faults (99% memcpy)
    RL: 350,073 context switches (72% consensual)
    RL: performed 0 reads and 11,494,960 write i/o operations

pledge() and unveil() no longer consider ENOSYS to be an error.
These functions have also been added to Python's cosmo module.

This change also removes some WIN32 APIs and System Five magnums
which we're not using and it's doubtful anyone else would be too
2022-08-10 04:43:09 -07:00

280 lines
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/*
* QuickJS Javascript Engine
*
* Copyright (c) 2017-2021 Fabrice Bellard
* Copyright (c) 2017-2021 Charlie Gordon
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "libc/str/str.h"
#include "third_party/quickjs/internal.h"
asm(".ident\t\"\\n\\n\
QuickJS (MIT License)\\n\
Copyright (c) 2017-2021 Fabrice Bellard\\n\
Copyright (c) 2017-2021 Charlie Gordon\"");
asm(".include \"libc/disclaimer.inc\"");
/* clang-format off */
static int string_get_hex(JSString *p, int k, int n) {
int c = 0, h;
while (n-- > 0) {
if ((h = from_hex(string_get(p, k++))) < 0)
return -1;
c = (c << 4) | h;
}
return c;
}
static int isURIReserved(int c) {
return c < 0x100 && memchr(";/?:@&=+$,#", c, sizeof(";/?:@&=+$,#") - 1) != NULL;
}
static int hex_decode(JSContext *ctx, JSString *p, int k) {
int c;
if (k >= p->len || string_get(p, k) != '%')
return js_throw_URIError(ctx, "expecting %%");
if (k + 2 >= p->len || (c = string_get_hex(p, k + 1, 2)) < 0)
return js_throw_URIError(ctx, "expecting hex digit");
return c;
}
JSValue js_global_decodeURI(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv, int isComponent)
{
JSValue str;
StringBuffer b_s, *b = &b_s;
JSString *p;
int k, c, c1, n, c_min;
str = JS_ToString(ctx, argv[0]);
if (JS_IsException(str))
return str;
string_buffer_init(ctx, b, 0);
p = JS_VALUE_GET_STRING(str);
for (k = 0; k < p->len;) {
c = string_get(p, k);
if (c == '%') {
c = hex_decode(ctx, p, k);
if (c < 0)
goto fail;
k += 3;
if (c < 0x80) {
if (!isComponent && isURIReserved(c)) {
c = '%';
k -= 2;
}
} else {
/* Decode URI-encoded UTF-8 sequence */
if (c >= 0xc0 && c <= 0xdf) {
n = 1;
c_min = 0x80;
c &= 0x1f;
} else if (c >= 0xe0 && c <= 0xef) {
n = 2;
c_min = 0x800;
c &= 0xf;
} else if (c >= 0xf0 && c <= 0xf7) {
n = 3;
c_min = 0x10000;
c &= 0x7;
} else {
n = 0;
c_min = 1;
c = 0;
}
while (n-- > 0) {
c1 = hex_decode(ctx, p, k);
if (c1 < 0)
goto fail;
k += 3;
if ((c1 & 0xc0) != 0x80) {
c = 0;
break;
}
c = (c << 6) | (c1 & 0x3f);
}
if (c < c_min || c > 0x10FFFF ||
(c >= 0xd800 && c < 0xe000)) {
js_throw_URIError(ctx, "malformed UTF-8");
goto fail;
}
}
} else {
k++;
}
string_buffer_putc(b, c);
}
JS_FreeValue(ctx, str);
return string_buffer_end(b);
fail:
JS_FreeValue(ctx, str);
string_buffer_free(b);
return JS_EXCEPTION;
}
static int isUnescaped(int c) {
static char const unescaped_chars[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz"
"0123456789"
"@*_+-./";
return c < 0x100 &&
memchr(unescaped_chars, c, sizeof(unescaped_chars) - 1);
}
static int isURIUnescaped(int c, int isComponent) {
return c < 0x100 &&
((c >= 0x61 && c <= 0x7a) ||
(c >= 0x41 && c <= 0x5a) ||
(c >= 0x30 && c <= 0x39) ||
memchr("-_.!~*'()", c, sizeof("-_.!~*'()") - 1) != NULL ||
(!isComponent && isURIReserved(c)));
}
static int encodeURI_hex(StringBuffer *b, int c) {
uint8_t buf[6];
int n = 0;
const char *hex = "0123456789ABCDEF";
buf[n++] = '%';
if (c >= 256) {
buf[n++] = 'u';
buf[n++] = hex[(c >> 12) & 15];
buf[n++] = hex[(c >> 8) & 15];
}
buf[n++] = hex[(c >> 4) & 15];
buf[n++] = hex[(c >> 0) & 15];
return string_buffer_write8(b, buf, n);
}
JSValue js_global_encodeURI(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv,
int isComponent)
{
JSValue str;
StringBuffer b_s, *b = &b_s;
JSString *p;
int k, c, c1;
str = JS_ToString(ctx, argv[0]);
if (JS_IsException(str))
return str;
p = JS_VALUE_GET_STRING(str);
string_buffer_init(ctx, b, p->len);
for (k = 0; k < p->len;) {
c = string_get(p, k);
k++;
if (isURIUnescaped(c, isComponent)) {
string_buffer_putc16(b, c);
} else {
if (c >= 0xdc00 && c <= 0xdfff) {
js_throw_URIError(ctx, "invalid character");
goto fail;
} else if (c >= 0xd800 && c <= 0xdbff) {
if (k >= p->len) {
js_throw_URIError(ctx, "expecting surrogate pair");
goto fail;
}
c1 = string_get(p, k);
k++;
if (c1 < 0xdc00 || c1 > 0xdfff) {
js_throw_URIError(ctx, "expecting surrogate pair");
goto fail;
}
c = (((c & 0x3ff) << 10) | (c1 & 0x3ff)) + 0x10000;
}
if (c < 0x80) {
encodeURI_hex(b, c);
} else {
/* XXX: use C UTF-8 conversion ? */
if (c < 0x800) {
encodeURI_hex(b, (c >> 6) | 0xc0);
} else {
if (c < 0x10000) {
encodeURI_hex(b, (c >> 12) | 0xe0);
} else {
encodeURI_hex(b, (c >> 18) | 0xf0);
encodeURI_hex(b, ((c >> 12) & 0x3f) | 0x80);
}
encodeURI_hex(b, ((c >> 6) & 0x3f) | 0x80);
}
encodeURI_hex(b, (c & 0x3f) | 0x80);
}
}
}
JS_FreeValue(ctx, str);
return string_buffer_end(b);
fail:
JS_FreeValue(ctx, str);
string_buffer_free(b);
return JS_EXCEPTION;
}
JSValue js_global_escape(JSContext *ctx, JSValueConst this_val, int argc, JSValueConst *argv)
{
JSValue str;
StringBuffer b_s, *b = &b_s;
JSString *p;
int i, len, c;
str = JS_ToString(ctx, argv[0]);
if (JS_IsException(str))
return str;
p = JS_VALUE_GET_STRING(str);
string_buffer_init(ctx, b, p->len);
for (i = 0, len = p->len; i < len; i++) {
c = string_get(p, i);
if (isUnescaped(c)) {
string_buffer_putc16(b, c);
} else {
encodeURI_hex(b, c);
}
}
JS_FreeValue(ctx, str);
return string_buffer_end(b);
}
JSValue js_global_unescape(JSContext *ctx, JSValueConst this_val, int argc, JSValueConst *argv)
{
JSValue str;
StringBuffer b_s, *b = &b_s;
JSString *p;
int i, len, c, n;
str = JS_ToString(ctx, argv[0]);
if (JS_IsException(str))
return str;
string_buffer_init(ctx, b, 0);
p = JS_VALUE_GET_STRING(str);
for (i = 0, len = p->len; i < len; i++) {
c = string_get(p, i);
if (c == '%') {
if (i + 6 <= len
&& string_get(p, i + 1) == 'u'
&& (n = string_get_hex(p, i + 2, 4)) >= 0) {
c = n;
i += 6 - 1;
} else
if (i + 3 <= len
&& (n = string_get_hex(p, i + 1, 2)) >= 0) {
c = n;
i += 3 - 1;
}
}
string_buffer_putc16(b, c);
}
JS_FreeValue(ctx, str);
return string_buffer_end(b);
}
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