mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
6e6fc38935
Commit bc6c183 introduced a bunch of discrepancies between what files
look like in the repo and what clang-format says they should look like.
However, there were already a few discrepancies prior to that. Most of
these discrepancies seemed to be unintentional, but a few of them were
load-bearing (e.g., a #include that violated header ordering needing
something to have been #defined by a 'later' #include.)
I opted to take what I hope is a relatively smooth-brained approach: I
reverted the .clang-format change, ran clang-format on the whole repo,
reapplied the .clang-format change, reran clang-format again, and then
reverted the commit that contained the first run. Thus the full effect
of this PR should only be to apply the changed formatting rules to the
repo, and from skimming the results, this seems to be the case.
My work can be checked by applying the short, manual commits, and then
rerunning the command listed in the autogenerated commits (those whose
messages I have prefixed auto:) and seeing if your results agree.
It might be that the other diffs should be fixed at some point but I'm
leaving that aside for now.
fd '\.c(c|pp)?$' --print0| xargs -0 clang-format -i
602 lines
19 KiB
C
602 lines
19 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/fmt/conv.h"
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#include "libc/fmt/internal.h"
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#include "libc/limits.h"
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#include "libc/mem/internal.h"
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#include "libc/mem/mem.h"
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#include "libc/runtime/runtime.h"
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#include "libc/str/str.h"
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#include "libc/str/tab.internal.h"
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#include "libc/str/tpdecodecb.internal.h"
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#include "libc/str/utf16.h"
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#include "libc/sysv/errfuns.h"
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#include "third_party/gdtoa/gdtoa.h"
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#define READ \
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({ \
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int c = callback(arg); \
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if (c != -1) \
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++consumed; \
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c; \
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})
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#define FP_BUFFER_GROW 48
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#define BUFFER \
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({ \
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int c = READ; \
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if (fpbufcur >= fpbufsize - 1) { \
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fpbufsize = fpbufsize + FP_BUFFER_GROW; \
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fpbuf = realloc(fpbuf, fpbufsize); \
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} \
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if (c != -1) { \
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fpbuf[fpbufcur++] = c; \
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fpbuf[fpbufcur] = '\0'; \
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} \
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c; \
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})
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#define UNBUFFER \
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({ \
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if (c != -1) { \
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fpbuf[--fpbufcur] = '\0'; \
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} \
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})
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/**
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* String / file / stream decoder.
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*
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* This scanf implementation is able to tokenize strings containing
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* 8-bit through 128-bit integers (with validation), floating point
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* numbers, etc. It can also be used to convert UTF-8 to UTF-16/32.
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*
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* - `%d` parses integer
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* - `%ms` parses string allocating buffer assigning pointer
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*
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* @param callback supplies UTF-8 characters using -1 sentinel
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* @param fmt is a computer program embedded inside a c string, written
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* in a domain-specific programming language that, by design, lacks
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* Turing-completeness
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* @param va points to the variadic argument state
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* @see libc/fmt/pflink.h (dynamic memory is not a requirement)
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*/
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int __vcscanf(int callback(void *), //
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int unget(int, void *), //
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void *arg, //
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const char *fmt, //
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va_list va) {
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struct FreeMe {
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struct FreeMe *next;
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void *ptr;
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} *freeme = NULL;
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unsigned char *fpbuf = NULL;
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size_t fpbufsize;
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size_t fpbufcur;
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const unsigned char *p = (const unsigned char *)fmt;
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int *n_ptr;
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int items = 0;
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int consumed = 0;
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unsigned i = 0;
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int c = READ;
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for (;;) {
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switch (p[i++]) {
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case '\0':
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if (c != -1 && unget) {
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unget(c, arg);
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}
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goto Done;
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case ' ':
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case '\t':
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case '\n':
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case '\r':
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case '\v':
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while (isspace(c)) {
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c = READ;
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}
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break;
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case '%': {
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uint128_t number;
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unsigned char *buf;
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size_t bufsize;
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double fp;
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unsigned width = 0;
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unsigned char bits = 32;
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unsigned char charbytes = sizeof(char);
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unsigned char diglet;
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unsigned char base;
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unsigned char prefix;
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bool rawmode = false;
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bool issigned = false;
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bool ismalloc = false;
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bool isneg = false;
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bool thousands = false;
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bool discard = false;
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for (;;) {
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switch (p[i++]) {
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case '%': // %% → %
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goto NonDirectiveCharacter;
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case '0':
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case '1':
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case '2':
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case '3':
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case '4':
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case '5':
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case '6':
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case '7':
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case '8':
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case '9':
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width *= 10;
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width += p[i - 1] - '0';
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break;
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case '*':
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discard = true;
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break;
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case 'm':
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ismalloc = true;
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break;
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case 'c':
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rawmode = true;
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if (!width)
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width = 1;
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// fallthrough
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case 's':
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while (isspace(c)) {
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c = READ;
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}
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goto DecodeString;
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case '\'':
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thousands = true;
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break;
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case 'j': // j=64-bit jj=128-bit
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if (bits < 64) {
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bits = 64;
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} else {
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bits = 128;
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}
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break;
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case 'l': // long
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case 'L': // loooong
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charbytes = sizeof(wchar_t);
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// fallthrough
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case 't': // ptrdiff_t
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case 'Z': // size_t
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case 'z': // size_t
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bits = 64;
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break;
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case 'h': // short and char
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charbytes = sizeof(char16_t);
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bits >>= 1;
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break;
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case 'b': // binary
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base = 2;
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prefix = 'b';
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goto ConsumeBasePrefix;
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case 'p': // pointer (NexGen32e)
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bits = 48;
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// fallthrough
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case 'x':
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case 'X': // hexadecimal
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base = 16;
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prefix = 'x';
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goto ConsumeBasePrefix;
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case 'o': // octal
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base = 8;
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goto HandleNumber;
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case 'n':
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goto ReportConsumed;
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case 'd': // decimal
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issigned = true;
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// fallthrough
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case 'u':
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base = 10;
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HandleNumber:
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while (isspace(c)) {
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c = READ;
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}
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if (c == '+' || (isneg = c == '-')) {
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c = READ;
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}
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goto DecodeNumber;
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case 'i': // flexidecimal
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while (isspace(c)) {
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c = READ;
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}
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if (c == '+' || (isneg = c == '-')) {
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c = READ;
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}
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if (c == '0') {
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c = READ;
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if (c == 'x' || c == 'X') {
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c = READ;
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base = 16;
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} else if (c == 'b' || c == 'B') {
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c = READ;
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base = 2;
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} else if ('0' <= c && c <= '7') {
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base = 8;
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} else {
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number = 0;
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goto GotNumber;
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}
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} else {
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base = 10;
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}
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goto DecodeNumber;
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case 'a':
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case 'A':
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case 'e':
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case 'E':
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case 'f':
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case 'F':
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case 'g':
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case 'G': // floating point number
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if (!(charbytes == sizeof(char) ||
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charbytes == sizeof(wchar_t))) {
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items = -1;
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goto Done;
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}
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while (isspace(c)) {
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c = READ;
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}
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fpbufsize = FP_BUFFER_GROW;
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fpbuf = malloc(fpbufsize);
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fpbufcur = 0;
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fpbuf[fpbufcur++] = c;
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fpbuf[fpbufcur] = '\0';
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goto ConsumeFloatingPointNumber;
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default:
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items = einval();
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goto Done;
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}
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}
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ConsumeBasePrefix:
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while (isspace(c)) {
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c = READ;
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}
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if (c == '+' || (isneg = c == '-')) {
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c = READ;
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}
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if (c == '0') {
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c = READ;
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if (c == prefix || c == prefix + ('a' - 'A')) {
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c = READ;
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} else if (c == -1) {
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number = 0;
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goto GotNumber;
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}
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}
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DecodeNumber:
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if (c != -1 && (1 <= kBase36[(unsigned char)c] &&
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kBase36[(unsigned char)c] <= base)) {
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number = 0;
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width = !width ? bits : width;
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do {
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diglet = kBase36[(unsigned char)c];
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if (1 <= diglet && diglet <= base) {
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width -= 1;
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number *= base;
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number += diglet - 1;
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} else if (thousands && diglet == ',') {
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// ignore
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} else {
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break;
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}
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} while ((c = READ) != -1 && width > 0);
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GotNumber:
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if (!discard) {
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uint128_t bane = (uint128_t)1 << (bits - 1);
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if (!(number & ~((bane - 1) | (issigned ? 0 : bane))) ||
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(issigned && number == bane)) {
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++items;
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} else {
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items = erange();
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goto Done;
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}
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if (issigned && isneg) {
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number = ~number + 1;
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}
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void *out = va_arg(va, void *);
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switch (bits) {
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case sizeof(uint128_t) * CHAR_BIT:
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*(uint128_t *)out = number;
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break;
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case 48:
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case 64:
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*(uint64_t *)out = (uint64_t)number;
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break;
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case 32:
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*(uint32_t *)out = (uint32_t)number;
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break;
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case 16:
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*(uint16_t *)out = (uint16_t)number;
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break;
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case 8:
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default:
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*(uint8_t *)out = (uint8_t)number;
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break;
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}
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} else if (!items && c == -1) {
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items = -1;
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goto Done;
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}
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} else if (c == -1 && !items) {
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items = -1;
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goto Done;
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} else {
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if (c != -1 && unget) {
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unget(c, arg);
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}
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goto Done;
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}
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continue;
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ConsumeFloatingPointNumber:
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if (c == '+' || c == '-') {
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c = BUFFER;
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}
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bool hexadecimal = false;
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if (c == '0') {
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c = BUFFER;
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if (c == 'x' || c == 'X') {
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c = BUFFER;
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hexadecimal = true;
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goto BufferFloatingPointNumber;
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} else if (c == -1) {
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goto GotFloatingPointNumber;
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} else {
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goto BufferFloatingPointNumber;
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}
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} else if (c == 'n' || c == 'N') {
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c = BUFFER;
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if (c == 'a' || c == 'A') {
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c = BUFFER;
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if (c == 'n' || c == 'N') {
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c = BUFFER;
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if (c == '(') {
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c = BUFFER;
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do {
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bool isdigit = c >= '0' && c <= '9';
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bool isletter =
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(c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
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if (!(c == '_' || isdigit || isletter)) {
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goto Done;
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}
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} while ((c = BUFFER) != -1 && c != ')');
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if (c == ')') {
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c = READ;
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}
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goto GotFloatingPointNumber;
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} else {
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UNBUFFER;
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goto GotFloatingPointNumber;
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}
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} else {
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goto Done;
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}
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} else {
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goto Done;
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}
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} else if (c == 'i' || c == 'I') {
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c = BUFFER;
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if (c == 'n' || c == 'N') {
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c = BUFFER;
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if (c == 'f' || c == 'F') {
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c = BUFFER;
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if (c == 'i' || c == 'I') {
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c = BUFFER;
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if (c == 'n' || c == 'N') {
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c = BUFFER;
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if (c == 'i' || c == 'I') {
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c = BUFFER;
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|
if (c == 't' || c == 'T') {
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c = BUFFER;
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if (c == 'y' || c == 'Y') {
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c = BUFFER;
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} else {
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goto Done;
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}
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} else {
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goto Done;
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}
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} else {
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goto Done;
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}
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} else {
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goto Done;
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}
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} else {
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UNBUFFER;
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goto GotFloatingPointNumber;
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}
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} else {
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goto Done;
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}
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} else {
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goto Done;
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}
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}
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BufferFloatingPointNumber:
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enum { INTEGER, FRACTIONAL, SIGN, EXPONENT } state = INTEGER;
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do {
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bool isdecdigit = c >= '0' && c <= '9';
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|
bool ishexdigit = (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F');
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|
bool ispoint = c == '.' || c == ',';
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|
bool isdecexp = c == 'e' || c == 'E';
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|
bool ishexp = c == 'p' || c == 'P';
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|
bool issign = c == '+' || c == '-';
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|
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|
switch (state) {
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|
case INTEGER:
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|
case FRACTIONAL:
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|
if (isdecdigit || (hexadecimal && ishexdigit)) {
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goto Continue;
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|
} else if (state == INTEGER && ispoint) {
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state = FRACTIONAL;
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goto Continue;
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|
} else if (isdecexp || (hexadecimal && ishexp)) {
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|
state = SIGN;
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|
goto Continue;
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|
} else {
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|
goto Break;
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|
}
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|
case SIGN:
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|
if (issign) {
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state = EXPONENT;
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|
goto Continue;
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|
}
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|
state = EXPONENT;
|
|
// fallthrough
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|
case EXPONENT:
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|
if (isdecdigit) {
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|
goto Continue;
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|
} else {
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|
goto Break;
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|
}
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|
default:
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|
goto Break;
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|
}
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|
Continue:
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|
continue;
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|
Break:
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|
UNBUFFER;
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|
break;
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|
} while ((c = BUFFER) != -1);
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|
GotFloatingPointNumber:
|
|
/* An empty buffer can't be a valid float; don't even bother parsing. */
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|
bool valid = fpbufcur > 0;
|
|
if (valid) {
|
|
char *ep;
|
|
fp = strtod((char *)fpbuf, &ep);
|
|
/* We should have parsed the whole buffer. */
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|
valid = ep == (char *)fpbuf + fpbufcur;
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|
}
|
|
free(fpbuf);
|
|
fpbuf = NULL;
|
|
fpbufcur = fpbufsize = 0;
|
|
if (!valid) {
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|
goto Done;
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|
}
|
|
if (!discard) {
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|
++items;
|
|
void *out = va_arg(va, void *);
|
|
if (charbytes == sizeof(char)) {
|
|
*(float *)out = (float)fp;
|
|
} else {
|
|
*(double *)out = (double)fp;
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|
}
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|
}
|
|
continue;
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|
ReportConsumed:
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|
n_ptr = va_arg(va, int *);
|
|
if (c != -1) {
|
|
*n_ptr = consumed - 1; // minus lookahead
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|
} else {
|
|
*n_ptr = consumed;
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|
}
|
|
continue;
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|
DecodeString:
|
|
bufsize = !width ? 32 : rawmode ? width : width + 1;
|
|
if (discard) {
|
|
buf = NULL;
|
|
} else if (ismalloc) {
|
|
buf = malloc(bufsize * charbytes);
|
|
struct FreeMe *entry;
|
|
if (buf && (entry = calloc(1, sizeof(struct FreeMe)))) {
|
|
entry->ptr = buf;
|
|
entry->next = freeme;
|
|
freeme = entry;
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|
}
|
|
} else {
|
|
buf = va_arg(va, void *);
|
|
}
|
|
if (buf) {
|
|
size_t j = 0;
|
|
for (;;) {
|
|
if (ismalloc && !width && j + 2 + 1 >= bufsize &&
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|
!__grow(&buf, &bufsize, charbytes, 0)) {
|
|
width = bufsize - 1;
|
|
}
|
|
if (c != -1 && j + !rawmode < bufsize && (rawmode || !isspace(c))) {
|
|
if (charbytes == 1) {
|
|
buf[j++] = (unsigned char)c;
|
|
c = READ;
|
|
} else if (tpdecodecb((wint_t *)&c, c, (void *)callback, arg) !=
|
|
-1) {
|
|
if (charbytes == sizeof(char16_t)) {
|
|
unsigned w = EncodeUtf16(c);
|
|
do {
|
|
if ((j + 1) * 2 < bufsize) {
|
|
((char16_t *)buf)[j++] = w;
|
|
}
|
|
} while ((w >>= 16));
|
|
} else {
|
|
((wchar_t *)buf)[j++] = (wchar_t)c;
|
|
}
|
|
c = READ;
|
|
}
|
|
} else {
|
|
if (!j && c == -1 && !items) {
|
|
items = -1;
|
|
goto Done;
|
|
} else if (rawmode && j != width) {
|
|
/* The C standard says that %c "matches a sequence of characters of
|
|
* **exactly** the number specified by the field width". If we have
|
|
* fewer characters, what we've just read is invalid. */
|
|
goto Done;
|
|
} else if (!rawmode && j < bufsize) {
|
|
if (charbytes == sizeof(char)) {
|
|
buf[j] = '\0';
|
|
} else if (charbytes == sizeof(char16_t)) {
|
|
((char16_t *)buf)[j] = u'\0';
|
|
} else if (charbytes == sizeof(wchar_t)) {
|
|
((wchar_t *)buf)[j] = L'\0';
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
++items;
|
|
if (ismalloc) {
|
|
*va_arg(va, char **) = (void *)buf;
|
|
}
|
|
buf = NULL;
|
|
} else {
|
|
do {
|
|
if (isspace(c))
|
|
break;
|
|
} while ((c = READ) != -1);
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
NonDirectiveCharacter:
|
|
c = (c == p[i - 1]) ? READ : -1;
|
|
break;
|
|
}
|
|
}
|
|
Done:
|
|
while (freeme) {
|
|
struct FreeMe *entry = freeme;
|
|
freeme = entry->next;
|
|
if (items == -1)
|
|
free(entry->ptr);
|
|
free(entry);
|
|
}
|
|
if (fpbuf)
|
|
free(fpbuf);
|
|
return items;
|
|
}
|