Merge "Implement C23 scanf 'w' length modifiers" am: c16b51dd63
Original change: https://android-review.googlesource.com/c/platform/bionic/+/2583371 Change-Id: I48c3683d4e7362513b65876d3b53e36dcc8febb0 Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
This commit is contained in:
Treehugger Robot
Automerger Merge Worker
commit
05ce4bc862
4 changed files with 281 additions and 103 deletions
115
libc/stdio/scanf_common.h
Normal file
115
libc/stdio/scanf_common.h
Normal file
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@ -0,0 +1,115 @@
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/* $OpenBSD: vfscanf.c,v 1.31 2014/03/19 05:17:01 guenther Exp $ */
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/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <ctype.h>
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#include <inttypes.h>
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#include <limits.h>
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#include <locale.h>
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#include <stdarg.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/param.h>
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#include <wctype.h>
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#include "local.h"
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#include <platform/bionic/macros.h>
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#include <private/bionic_fortify.h>
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#include <private/bionic_mbstate.h>
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#define BUF 513 /* Maximum length of numeric string. */
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// Flags used during conversion.
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// Size/type:
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#define LONG 0x00001 // l: long or double
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#define LONGDBL 0x00002 // L: long double
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#define SHORT 0x00004 // h: short
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#define SHORTSHORT 0x00008 // hh: 8 bit integer
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#define LLONG 0x00010 // ll: long long (+ deprecated q: quad)
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#define POINTER 0x00020 // p: void* (as hex)
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#define SIZEINT 0x00040 // z: (signed) size_t
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#define MAXINT 0x00080 // j: intmax_t
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#define PTRINT 0x00100 // t: ptrdiff_t
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#define NOSKIP 0x00200 // [ or c: do not skip blanks
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// Modifiers:
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#define SUPPRESS 0x00400 // *: suppress assignment
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#define UNSIGNED 0x00800 // %[oupxX] conversions
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#define ALLOCATE 0x01000 // m: allocate a char*
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// Internal use during integer parsing:
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#define SIGNOK 0x02000 // +/- is (still) legal
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#define HAVESIGN 0x04000 // Sign detected
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#define NDIGITS 0x08000 // No digits detected
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#define PFXOK 0x10000 // "0x" prefix is (still) legal
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#define PFBOK 0x20000 // "0b" prefix is (still) legal
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#define NZDIGITS 0x40000 // No zero digits detected
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// Conversion types.
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#define CT_CHAR 0 // %c conversion
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#define CT_CCL 1 // %[...] conversion
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#define CT_STRING 2 // %s conversion
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#define CT_INT 3 // Integer: strtoimax/strtoumax
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#define CT_FLOAT 4 // Float: strtod
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#define to_digit(c) static_cast<int>((c) - '0')
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#define is_digit(c) ((unsigned)to_digit(c) <= 9)
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// Append a digit to a value and check for overflow.
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#define APPEND_DIGIT(val, dig) \
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do { \
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if ((val) > INT_MAX / 10) \
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errno = ENOMEM; \
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else { \
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(val) *= 10; \
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if ((val) > INT_MAX - to_digit((dig))) \
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errno = ENOMEM; \
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else \
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(val) += to_digit((dig)); \
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} \
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} while (0)
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wunused-function"
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// Trasnlate a fixed size integer argument for the %w/%wf format to a
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// flag representation. Supported sizes are 8, 16, 32, and 64 so far.
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// See details in bionic/libc/include/stdint.h
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static int w_to_flag(int size, bool fast) {
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static constexpr int fast_size = sizeof(void*) == 8 ? LLONG : 0;
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if (size == 8) return SHORTSHORT;
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if (size == 16) return fast ? fast_size : SHORT;
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if (size == 32) return fast ? fast_size : 0;
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if (size == 64) return LLONG;
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__fortify_fatal("%%w%s%d is unsupported", fast ? "f" : "", size);
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}
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#pragma clang diagnostic pop
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@ -31,53 +31,7 @@
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* SUCH DAMAGE.
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*/
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#include <ctype.h>
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#include <inttypes.h>
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#include <stdarg.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/param.h>
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#include <wctype.h>
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#include "local.h"
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#include <private/bionic_fortify.h>
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#include <platform/bionic/macros.h>
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#include <private/bionic_mbstate.h>
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#define BUF 513 /* Maximum length of numeric string. */
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// Flags used during conversion.
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// Size/type:
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#define LONG 0x00001 // l: long or double
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#define LONGDBL 0x00002 // L: long double
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#define SHORT 0x00004 // h: short
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#define SHORTSHORT 0x00008 // hh: 8 bit integer
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#define LLONG 0x00010 // ll: long long (+ deprecated q: quad)
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#define POINTER 0x00020 // p: void* (as hex)
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#define SIZEINT 0x00040 // z: (signed) size_t
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#define MAXINT 0x00080 // j: intmax_t
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#define PTRINT 0x00100 // t: ptrdiff_t
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#define NOSKIP 0x00200 // [ or c: do not skip blanks
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// Modifiers:
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#define SUPPRESS 0x00400 // *: suppress assignment
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#define UNSIGNED 0x00800 // %[oupxX] conversions
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#define ALLOCATE 0x01000 // m: allocate a char*
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// Internal use during integer parsing:
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#define SIGNOK 0x02000 // +/- is (still) legal
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#define HAVESIGN 0x04000 // Sign detected
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#define NDIGITS 0x08000 // No digits detected
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#define PFXOK 0x10000 // "0x" prefix is (still) legal
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#define PFBOK 0x20000 // "0b" prefix is (still) legal
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#define NZDIGITS 0x40000 // No zero digits detected
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// Conversion types.
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#define CT_CHAR 0 // %c conversion
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#define CT_CCL 1 // %[...] conversion
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#define CT_STRING 2 // %s conversion
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#define CT_INT 3 // Integer: strtoimax/strtoumax
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#define CT_FLOAT 4 // Float: strtod
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#include "scanf_common.h"
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static const unsigned char* __sccl(char*, const unsigned char*);
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@ -122,6 +76,7 @@ int __svfscanf(FILE* fp, const char* fmt0, va_list ap) {
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*/
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again:
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c = *fmt++;
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reswitch:
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switch (c) {
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case '%':
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literal:
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@ -220,6 +175,18 @@ literal:
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base = 10;
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break;
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case 'w': {
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int size = 0;
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bool fast = false;
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c = *fmt++;
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while (is_digit(c)) {
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APPEND_DIGIT(size, c);
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c = *fmt++;
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}
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flags |= w_to_flag(size, fast);
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goto reswitch;
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}
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case 'X':
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case 'x':
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flags |= PFXOK; /* enable 0x prefixing */
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@ -31,62 +31,7 @@
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* SUCH DAMAGE.
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*/
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#include <inttypes.h>
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#include <limits.h>
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#include <locale.h>
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#include <stdarg.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wctype.h>
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#include "local.h"
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#include <platform/bionic/macros.h>
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#define BUF 513 /* Maximum length of numeric string. */
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/*
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* Flags used during conversion.
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*/
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#define LONG 0x00001 /* l: long or double */
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#define LONGDBL 0x00002 /* L: long double */
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#define SHORT 0x00004 /* h: short */
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#define SHORTSHORT 0x00008 /* hh: 8 bit integer */
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#define LLONG 0x00010 /* ll: long long (+ deprecated q: quad) */
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#define POINTER 0x00020 /* p: void * (as hex) */
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#define SIZEINT 0x00040 /* z: (signed) size_t */
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#define MAXINT 0x00080 /* j: intmax_t */
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#define PTRINT 0x00100 /* t: ptrdiff_t */
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#define NOSKIP 0x00200 /* [ or c: do not skip blanks */
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#define SUPPRESS 0x00400 /* *: suppress assignment */
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#define UNSIGNED 0x00800 /* %[oupxX] conversions */
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/*
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* The following are used in numeric conversions only:
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* SIGNOK, HAVESIGN, NDIGITS, DPTOK, and EXPOK are for floating point;
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* SIGNOK, HAVESIGN, NDIGITS, PFXOK, and NZDIGITS are for integral.
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*/
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#define SIGNOK 0x01000 /* +/- is (still) legal */
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#define HAVESIGN 0x02000 /* sign detected */
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#define NDIGITS 0x04000 /* no digits detected */
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#define DPTOK 0x08000 /* (float) decimal point is still legal */
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#define EXPOK 0x10000 /* (float) exponent (e+3, etc) still legal */
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#define PFBOK 0x20000 /* 0x prefix is (still) legal */
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#define PFXOK 0x40000 /* 0x prefix is (still) legal */
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#define NZDIGITS 0x80000 /* no zero digits detected */
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/*
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* Conversion types.
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*/
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#define CT_CHAR 0 /* %c conversion */
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#define CT_CCL 1 /* %[...] conversion */
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#define CT_STRING 2 /* %s conversion */
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#define CT_INT 3 /* integer, i.e., strtoimax or strtoumax */
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#define CT_FLOAT 4 /* floating, i.e., strtod */
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#include "scanf_common.h"
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// An interpretive version of __sccl from vfscanf.c --- a table of all wchar_t values would
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// be a little too expensive, and some kind of compressed version isn't worth the trouble.
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static inline bool in_ccl(wchar_t wc, const wchar_t* ccl) {
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@ -176,6 +121,7 @@ int __vfwscanf(FILE* __restrict fp, const wchar_t* __restrict fmt, __va_list ap)
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*/
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again:
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c = *fmt++;
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reswitch:
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switch (c) {
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case '%':
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literal:
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@ -273,6 +219,18 @@ int __vfwscanf(FILE* __restrict fp, const wchar_t* __restrict fmt, __va_list ap)
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base = 10;
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break;
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case 'w': {
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int size = 0;
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bool fast = false;
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c = *fmt++;
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while (is_digit(c)) {
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APPEND_DIGIT(size, c);
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c = *fmt++;
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}
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flags |= w_to_flag(size, fast);
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goto reswitch;
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}
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case 'X':
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case 'x':
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flags |= PFXOK; /* enable 0x prefixing */
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|
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@ -3486,3 +3486,141 @@ TEST(STDIO_TEST, swprintf_invalid_wf_width) {
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GTEST_SKIP() << "no %w in glibc";
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#endif
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}
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TEST(STDIO_TEST, sscanf_w_base) {
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#if defined(__BIONIC__)
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wformat-invalid-specifier"
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int8_t a;
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EXPECT_EQ(1, sscanf("<0b101>", "<%w8b>", &a));
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EXPECT_EQ(0b101, a);
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int8_t b1;
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EXPECT_EQ(1, sscanf("<0xFF>", "<%w8i>", &b1));
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EXPECT_EQ(-1, b1);
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int8_t b2;
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EXPECT_EQ(1, sscanf("<0x1FF>", "<%w8i>", &b2));
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EXPECT_EQ(-1, b2);
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int16_t c1;
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EXPECT_EQ(1, sscanf("<0xFFFF>", "<%w16i>", &c1));
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EXPECT_EQ(-1, c1);
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uint16_t c2;
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EXPECT_EQ(1, sscanf("<64>", "<%w16d>", &c2));
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EXPECT_EQ(64, c2);
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int32_t d;
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EXPECT_EQ(1, sscanf("<021>", "<%w32o>", &d));
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EXPECT_EQ(021, d);
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uint32_t e;
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EXPECT_EQ(1, sscanf("<-1>", "<%w32u>", &e));
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EXPECT_EQ(4294967295, e);
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int64_t f;
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EXPECT_EQ(1, sscanf("<0x3b>", "<%w64x>", &f));
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EXPECT_EQ(0x3b, f);
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EXPECT_EQ(1, sscanf("<0x3b>", "<%w64X>", &f));
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EXPECT_EQ(0x3B, f);
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#pragma clang diagnostic pop
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#else
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GTEST_SKIP() << "no %w in glibc";
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#endif
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}
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TEST(STDIO_TEST, sscanf_w_combination) {
|
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#if defined(__BIONIC__)
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wformat"
|
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#pragma clang diagnostic ignored "-Wformat-invalid-specifier"
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#pragma clang diagnostic ignored "-Wformat-extra-args"
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uint32_t a;
|
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int64_t b;
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char c;
|
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|
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EXPECT_EQ(3, sscanf("<0b10101010101010101010101010101010 0x3333333344444444 1>",
|
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"<%w32b %w64x %c>", &a, &b, &c));
|
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EXPECT_EQ(0xaaaaaaaa, a);
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EXPECT_EQ(0x3333333344444444, b);
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EXPECT_EQ('1', c);
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#pragma clang diagnostic pop
|
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#else
|
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GTEST_SKIP() << "no %w in glibc";
|
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#endif
|
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}
|
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|
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TEST(STDIO_TEST, sscanf_invalid_w_width) {
|
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#if defined(__BIONIC__)
|
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#pragma clang diagnostic push
|
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#pragma clang diagnostic ignored "-Wformat-invalid-specifier"
|
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int32_t a;
|
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EXPECT_DEATH(sscanf("<100>", "<%w20d>", &a), "%w20 is unsupported");
|
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#pragma clang diagnostic pop
|
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#else
|
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GTEST_SKIP() << "no %w in glibc";
|
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#endif
|
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}
|
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|
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TEST(STDIO_TEST, swscanf_w_base) {
|
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#if defined(__BIONIC__)
|
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#pragma clang diagnostic push
|
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#pragma clang diagnostic ignored "-Wformat-invalid-specifier"
|
||||
int8_t a;
|
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EXPECT_EQ(1, swscanf(L"<0b101>", L"<%w8b>", &a));
|
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EXPECT_EQ(0b101, a);
|
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int8_t b1;
|
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EXPECT_EQ(1, swscanf(L"<0xFF>", L"<%w8i>", &b1));
|
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EXPECT_EQ(-1, b1);
|
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int8_t b2;
|
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EXPECT_EQ(1, swscanf(L"<0x1FF>", L"<%w8i>", &b2));
|
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EXPECT_EQ(-1, b2);
|
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int16_t c1;
|
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EXPECT_EQ(1, swscanf(L"<0xFFFF>", L"<%w16i>", &c1));
|
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EXPECT_EQ(-1, c1);
|
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uint16_t c2;
|
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EXPECT_EQ(1, swscanf(L"<64>", L"<%w16d>", &c2));
|
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EXPECT_EQ(64, c2);
|
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int32_t d;
|
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EXPECT_EQ(1, swscanf(L"<021>", L"<%w32o>", &d));
|
||||
EXPECT_EQ(021, d);
|
||||
uint32_t e;
|
||||
EXPECT_EQ(1, swscanf(L"<-1>", L"<%w32u>", &e));
|
||||
EXPECT_EQ(4294967295, e);
|
||||
int64_t f;
|
||||
EXPECT_EQ(1, swscanf(L"<0x3b>", L"<%w64x>", &f));
|
||||
EXPECT_EQ(0x3b, f);
|
||||
EXPECT_EQ(1, swscanf(L"<0x3b>", L"<%w64X>", &f));
|
||||
EXPECT_EQ(0x3B, f);
|
||||
#pragma clang diagnostic pop
|
||||
#else
|
||||
GTEST_SKIP() << "no %w in glibc";
|
||||
#endif
|
||||
}
|
||||
|
||||
TEST(STDIO_TEST, swscanf_w_combination) {
|
||||
#if defined(__BIONIC__)
|
||||
#pragma clang diagnostic push
|
||||
#pragma clang diagnostic ignored "-Wformat"
|
||||
#pragma clang diagnostic ignored "-Wformat-invalid-specifier"
|
||||
#pragma clang diagnostic ignored "-Wformat-extra-args"
|
||||
uint32_t a;
|
||||
int64_t b;
|
||||
char c;
|
||||
|
||||
EXPECT_EQ(3, swscanf(L"<0b10101010101010101010101010101010 0x3333333344444444 1>",
|
||||
L"<%w32b %w64x %c>", &a, &b, &c));
|
||||
EXPECT_EQ(0xaaaaaaaa, a);
|
||||
EXPECT_EQ(0x3333333344444444, b);
|
||||
EXPECT_EQ('1', c);
|
||||
#pragma clang diagnostic pop
|
||||
#else
|
||||
GTEST_SKIP() << "no %w in glibc";
|
||||
#endif
|
||||
}
|
||||
|
||||
TEST(STDIO_TEST, swscanf_invalid_w_width) {
|
||||
#if defined(__BIONIC__)
|
||||
#pragma clang diagnostic push
|
||||
#pragma clang diagnostic ignored "-Wformat-invalid-specifier"
|
||||
int32_t a;
|
||||
EXPECT_DEATH(swscanf(L"<100>", L"<%w20d>", &a), "%w20 is unsupported");
|
||||
#pragma clang diagnostic pop
|
||||
#else
|
||||
GTEST_SKIP() << "no %w in glibc";
|
||||
#endif
|
||||
}
|
||||
Loading…
Reference in a new issue