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StdLib: reinstate the use of va_arg() to handle long double arguments in vfscanf.

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Applies the patch, submitted by Olivier Martin, to use va_arg for long double.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <Olivier.Martin@arm.com>
Reviewed-by: Daryl McDaniel <daryl.mcdaniel@intel.com>

Also initializes an array so that strings will be properly terminated.
Includes some cosmetic changes to enhance readability.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Daryl McDaniel <daryl.mcdaniel@intel.com>
Reviewed-by: Olivier Martin <Olivier.Martin@arm.com>


git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15856 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Olivier Martin 2014-08-20 21:11:26 +00:00 committed by darylm503
parent dfa8858555
commit 9792ff7c5d
1 changed files with 21 additions and 24 deletions
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45
StdLib/LibC/Stdio/vfscanf.c
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@ -1,7 +1,7 @@
/** @file /** @file
Implementation of scanf internals for <stdio.h>. Implementation of scanf internals for <stdio.h>.
Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR> Copyright (c) 2010 - 2014, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available This program and the accompanying materials are licensed and made available
under the terms and conditions of the BSD License that accompanies this under the terms and conditions of the BSD License that accompanies this
distribution. The full text of the license may be found at distribution. The full text of the license may be found at
@ -124,7 +124,8 @@ int __scanfdebug = 0;
static int static int
__collate_range_cmp(int c1, int c2) __collate_range_cmp(int c1, int c2)
{ {
static char s1[2], s2[2]; static char s1[2] = { {0}, {0} };
static char s2[2] = { {0}, {0} };
s1[0] = (char)c1; s1[0] = (char)c1;
s2[0] = (char)c2; s2[0] = (char)c2;
@ -156,23 +157,23 @@ __svfscanf(FILE *fp, char const *fmt0, va_list ap)
int int
__svfscanf_unlocked(FILE *fp, const char *fmt0, va_list ap) __svfscanf_unlocked(FILE *fp, const char *fmt0, va_list ap)
{ {
const u_char *fmt = (const u_char *)fmt0; const u_char *fmt = (const u_char *)fmt0;
int c; /* character from format, or conversion */ int c; /* character from format, or conversion */
size_t width; /* field width, or 0 */ size_t width; /* field width, or 0 */
char *p; /* points into all kinds of strings */ char *p; /* points into all kinds of strings */
size_t n; /* handy size_t */ size_t n; /* handy size_t */
int flags; /* flags as defined above */ int flags; /* flags as defined above */
char *p0; /* saves original value of p when necessary */ char *p0; /* saves original value of p when necessary */
int nassigned; /* number of fields assigned */ int nassigned; /* number of fields assigned */
int nconversions; /* number of conversions */ int nconversions; /* number of conversions */
int nread; /* number of characters consumed from fp */ int nread; /* number of characters consumed from fp */
int base; /* base argument to conversion function */ int base; /* base argument to conversion function */
char ccltab[256]; /* character class table for %[...] */ char ccltab[256]; /* character class table for %[...] */
char buf[BUF]; /* buffer for numeric and mb conversions */ char buf[BUF]; /* buffer for numeric and mb conversions */
wchar_t *wcp; /* handy wide character pointer */ wchar_t *wcp; /* handy wide character pointer */
size_t nconv; /* length of multibyte sequence converted */ size_t nconv; /* length of multibyte sequence converted */
static const mbstate_t initial = { 0 }; static const mbstate_t initial = { 0 };
mbstate_t mbs; mbstate_t mbs;
/* `basefix' is used to avoid `if' tests in the integer scanner */ /* `basefix' is used to avoid `if' tests in the integer scanner */
static const short basefix[17] = static const short basefix[17] =
@ -843,12 +844,8 @@ literal:
goto match_failure; goto match_failure;
if ((flags & SUPPRESS) == 0) { if ((flags & SUPPRESS) == 0) {
if (flags & LONGDBL) { if (flags & LONGDBL) {
long double **mp = (long double **)ap;
long double res = strtold(buf, &p); long double res = strtold(buf, &p);
*va_arg(ap, long double *) = res;
*(*mp) = res;
ap += sizeof(long double *);
/*???*/ //*va_arg(ap, long double *) = res;
} else if (flags & LONG) { } else if (flags & LONG) {
double res = strtod(buf, &p); double res = strtod(buf, &p);
*va_arg(ap, double *) = res; *va_arg(ap, double *) = res;