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Commit 476d97b0 authored by Charles Davis's avatar Charles Davis Committed by Alexandre Julliard
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ntdll: Use an __ms_va_list in sscanf (Clang).

Signed-off-by: 's avatarCharles Davis <cdavis5x@gmail.com>
parent 58773385
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Showing with 590 additions and 4 deletions
dlls/ntdll/string.c
View file @ 476d97b0
......@@ -24,6 +24,7 @@
#include "wine/port.h"
#include <ctype.h>
#include <limits.h>
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
......@@ -774,16 +775,601 @@ LONG __cdecl NTDLL_atol( const char *nptr )
}
/* helper function for *scanf. Returns the value of character c in the
* given base, or -1 if the given character is not a digit of the base.
*/
static int char2digit( char c, int base )
{
if ((c >= '0' && c <= '9') && (c <= '0'+base-1)) return (c-'0');
if (base <= 10) return -1;
if ((c >= 'A') && (c <= 'Z') && (c <= 'A'+base-11)) return (c-'A'+10);
if ((c >= 'a') && (c <= 'z') && (c <= 'a'+base-11)) return (c-'a'+10);
return -1;
}
static int NTDLL_vsscanf( const char *str, const char *format, __ms_va_list ap)
{
int rd = 0, consumed = 0;
int nch;
if (!*format) return 0;
nch = (consumed++, *str++);
if (nch == '\0')
return EOF;
while (*format)
{
if (isspace( *format ))
{
/* skip whitespace */
while ((nch != '\0') && isspace( nch ))
nch = (consumed++, *str++);
}
else if (*format == '%')
{
int st = 0;
BOOLEAN suppress = 0;
int width = 0;
int base;
int h_prefix = 0;
BOOLEAN l_prefix = FALSE;
BOOLEAN L_prefix = FALSE;
BOOLEAN w_prefix = FALSE;
BOOLEAN I64_prefix = FALSE;
BOOLEAN prefix_finished = FALSE;
format++;
/* a leading asterisk means 'suppress assignment of this field' */
if (*format == '*')
{
format++;
suppress = TRUE;
}
/* look for width specification */
while (isdigit( *format ))
{
width *= 10;
width += *format++ - '0';
}
if (width == 0) width = -1; /* no width spec seen */
/* read prefix (if any) */
while (!prefix_finished)
{
switch (*format)
{
case 'h': h_prefix++; break;
case 'l':
if (*(format+1) == 'l')
{
I64_prefix = TRUE;
format++;
}
l_prefix = TRUE;
break;
case 'w': w_prefix = TRUE; break;
case 'L': L_prefix = TRUE; break;
case 'I':
if (*(format + 1) == '6' &&
*(format + 2) == '4')
{
I64_prefix = TRUE;
format += 2;
}
break;
default:
prefix_finished = TRUE;
}
if (!prefix_finished) format++;
}
/* read type */
switch (*format)
{
case 'p':
case 'P': /* pointer. */
if (sizeof(void *) == sizeof(LONGLONG)) I64_prefix = TRUE;
/* fall through */
case 'x':
case 'X': /* hexadecimal integer. */
base = 16;
goto number;
case 'o': /* octal integer */
base = 8;
goto number;
case 'u': /* unsigned decimal integer */
base = 10;
goto number;
case 'd': /* signed decimal integer */
base = 10;
goto number;
case 'i': /* generic integer */
base = 0;
number:
{
/* read an integer */
ULONGLONG cur = 0;
BOOLEAN negative = FALSE;
BOOLEAN seendigit = FALSE;
/* skip initial whitespace */
while ((nch != '\0') && isspace( nch ))
nch = (consumed++, *str++);
/* get sign */
if (nch == '-' || nch == '+')
{
negative = (nch == '-');
nch = (consumed++, *str++);
if (width > 0) width--;
}
/* look for leading indication of base */
if (width != 0 && nch == '0' && *format != 'p' && *format != 'P')
{
nch = (consumed++, *str++);
if (width > 0) width--;
seendigit = TRUE;
if (width != 0 && (nch == 'x' || nch == 'X'))
{
if (base == 0)
base = 16;
if (base == 16)
{
nch = (consumed++, *str++);
if (width > 0) width--;
seendigit = FALSE;
}
} else if (base == 0)
base = 8;
}
/* format %i without indication of base */
if (base == 0)
base = 10;
/* throw away leading zeros */
while (width != 0 && nch == '0')
{
nch = (consumed++, *str++);
if (width > 0) width--;
seendigit = TRUE;
}
if (width != 0 && char2digit( nch, base ) != -1)
{
cur = char2digit( nch, base );
nch = (consumed++, *str++);
if (width > 0) width--;
seendigit = TRUE;
}
/* read until no more digits */
while (width != 0 && nch != '\0' && char2digit( nch, base ) != -1)
{
cur = cur*base + char2digit( nch, base );
nch = (consumed++, *str++);
if (width > 0) width--;
seendigit = TRUE;
}
/* okay, done! */
if (!seendigit) break; /* not a valid number */
st = 1;
if (!suppress)
{
#define _SET_NUMBER_( type ) *va_arg( ap, type* ) = negative ? -cur : cur
if (I64_prefix) _SET_NUMBER_( LONGLONG );
else if (l_prefix) _SET_NUMBER_( LONG );
else if (h_prefix == 1) _SET_NUMBER_( short int );
else _SET_NUMBER_( int );
}
}
break;
case 'e':
case 'E':
case 'f':
case 'g':
case 'G':
{ /* read a float */
long double cur = 1, expcnt = 10;
ULONGLONG d, hlp;
int exp = 0;
BOOLEAN negative = FALSE;
/*unsigned fpcontrol;*/
BOOLEAN negexp;
/* skip initial whitespace */
while (nch != '\0' && isspace( nch ))
nch = (consumed++, *str++);
/* get sign */
if (nch == '-' || nch == '+')
{
negative = (nch == '-');
if (width > 0) width--;
if (width == 0) break;
nch = (consumed++, *str++);
}
/* get first digit */
if ('.' != nch)
{
if (!isdigit( nch )) break;
d = nch - '0';
nch = (consumed++, *str++);
if (width > 0) width--;
/* read until no more digits */
while (width != 0 && nch != '\0' && isdigit( nch ))
{
hlp = d * 10 + nch - '0';
nch = (consumed++, *str++);
if (width > 0) width--;
if(d > (ULONGLONG)-1/10 || hlp < d)
{
exp++;
break;
}
else
d = hlp;
}
while (width != 0 && nch != '\0' && isdigit( nch ))
{
exp++;
nch = (consumed++, *str++);
if (width > 0) width--;
}
}
else
d = 0; /* Fix: .8 -> 0.8 */
/* handle decimals */
if (width != 0 && nch == '.')
{
nch = (consumed++, *str++);
if (width > 0) width--;
while (width != 0 && nch != '\0' && isdigit( nch ))
{
hlp = d * 10 + nch - '0';
nch = (consumed++, *str++);
if (width > 0) width--;
if(d > (ULONGLONG)-1/10 || hlp < d)
break;
d = hlp;
exp--;
}
while (width != 0 && nch != '\0' && isdigit( nch ))
{
nch = (consumed++, *str++);
if (width > 0) width--;
}
}
/* handle exponent */
if (width != 0 && (nch == 'e' || nch == 'E'))
{
int sign = 1, e = 0;
nch = (consumed++, *str++);
if (width > 0) width--;
if (width != 0 && (nch == '+' || nch == '-'))
{
if(nch == '-')
sign = -1;
nch = (consumed++, *str++);
if (width > 0) width--;
}
/* exponent digits */
while (width != 0 && nch != '\0' && isdigit( nch ))
{
if (e > INT_MAX/10 || (e = e * 10 + nch - '0') < 0)
e = INT_MAX;
nch = (consumed++, *str++);
if (width > 0) width--;
}
e *= sign;
if(exp < 0 && e < 0 && e+exp > 0) exp = INT_MIN;
else if(exp > 0 && e > 0 && e+exp < 0) exp = INT_MAX;
else exp += e;
}
/*fpcontrol = _control87(0, 0);
_control87(MSVCRT__EM_DENORMAL|MSVCRT__EM_INVALID|MSVCRT__EM_ZERODIVIDE
|MSVCRT__EM_OVERFLOW|MSVCRT__EM_UNDERFLOW|MSVCRT__EM_INEXACT, 0xffffffff);*/
negexp = (exp < 0);
if (negexp)
exp = -exp;
/* update 'cur' with this exponent. */
while (exp)
{
if(exp & 1)
cur *= expcnt;
exp /= 2;
expcnt = expcnt*expcnt;
}
cur = (negexp ? d/cur : d*cur);
/*_control87(fpcontrol, 0xffffffff);*/
st = 1;
if (!suppress)
{
if (L_prefix || l_prefix) _SET_NUMBER_( double );
else _SET_NUMBER_( float );
}
}
break;
/* According to msdn,
* 's' reads a character string in a call to fscanf
* and 'S' a wide character string and vice versa in a
* call to fwscanf. The 'h', 'w' and 'l' prefixes override
* this behaviour. 'h' forces reading char * but 'l' and 'w'
* force reading WCHAR. */
case 's':
if (w_prefix || l_prefix) goto widecharstring;
else if (h_prefix) goto charstring;
else goto charstring;
case 'S':
if (w_prefix || l_prefix) goto widecharstring;
else if (h_prefix) goto charstring;
else goto widecharstring;
charstring:
{ /* read a word into a char */
char *sptr = suppress ? NULL : va_arg( ap, char * );
char *sptr_beg = sptr;
unsigned size = UINT_MAX;
/* skip initial whitespace */
while (nch != '\0' && isspace( nch ))
nch = (consumed++, *str++);
/* read until whitespace */
while (width != 0 && nch != '\0' && !isspace( nch ))
{
if (!suppress)
{
*sptr++ = nch;
if(size > 1) size--;
else
{
*sptr_beg = 0;
return rd;
}
}
st++;
nch = (consumed++, *str++);
if (width > 0) width--;
}
/* terminate */
if (st && !suppress) *sptr = 0;
}
break;
widecharstring:
{ /* read a word into a WCHAR * */
WCHAR *sptr = suppress ? NULL : va_arg( ap, WCHAR * );
WCHAR *sptr_beg = sptr;
unsigned size = UINT_MAX;
/* skip initial whitespace */
while (nch != '\0' && isspace( nch ))
nch = (consumed++, *str++);
/* read until whitespace */
while (width != 0 && nch != '\0' && !isspace( nch ))
{
if (!suppress)
{
*sptr++ = nch;
if (size > 1) size--;
else
{
*sptr_beg = 0;
return rd;
}
}
st++;
nch = (consumed++, *str++);
if (width > 0) width--;
}
/* terminate */
if (st && !suppress) *sptr = 0;
}
break;
/* 'c' and 'C work analogously to 's' and 'S' as described
* above */
case 'c':
if (w_prefix || l_prefix) goto widecharacter;
else if (h_prefix) goto character;
else goto character;
case 'C':
if (w_prefix || l_prefix) goto widecharacter;
else if (h_prefix) goto character;
else goto widecharacter;
character:
{ /* read single character into char */
char *str = suppress ? NULL : va_arg( ap, char * );
char *pstr = str;
unsigned size = UINT_MAX;
if (width == -1) width = 1;
while (width && nch != '\0')
{
if (!suppress)
{
*str++ = nch;
if(size) size--;
else
{
*pstr = 0;
return rd;
}
}
st++;
width--;
nch = (consumed++, *str++);
}
}
break;
widecharacter:
{ /* read single character into a WCHAR */
WCHAR *str = suppress ? NULL : va_arg( ap, WCHAR * );
WCHAR *pstr = str;
unsigned size = UINT_MAX;
if (width == -1) width = 1;
while (width && nch != '\0')
{
if (!suppress)
{
*str++ = nch;
if (size) size--;
else
{
*pstr = 0;
return rd;
}
}
st++;
width--;
nch = (consumed++, *str++);
}
}
break;
case 'n':
{
if (!suppress)
{
int *n = va_arg( ap, int * );
*n = consumed - 1;
}
/* This is an odd one: according to the standard,
* "Execution of a %n directive does not increment the
* assignment count returned at the completion of
* execution" even if it wasn't suppressed with the
* '*' flag. The Corrigendum to the standard seems
* to contradict this (comment out the assignment to
* suppress below if you want to implement these
* alternate semantics) but the windows program I'm
* looking at expects the behavior I've coded here
* (which happens to be what glibc does as well).
*/
suppress = TRUE;
st = 1;
}
break;
case '[':
{
char *str = suppress ? NULL : va_arg( ap, char * );
char *sptr = str;
RTL_BITMAP bitMask;
ULONG Mask[8];
BOOLEAN invert = FALSE; /* Set if we are NOT to find the chars */
unsigned size = UINT_MAX;
RtlInitializeBitMap( &bitMask, Mask, sizeof(Mask) * 8 );
/* Read the format */
format++;
if (*format == '^')
{
invert = TRUE;
format++;
}
if (*format == ']')
{
RtlSetBits( &bitMask, ']', 1 );
format++;
}
while (*format && (*format != ']'))
{
/* According to msdn:
* "Note that %[a-z] and %[z-a] are interpreted as equivalent to %[abcde...z]." */
if ((*format == '-') && (*(format + 1) != ']'))
{
if ((*(format - 1)) < *(format + 1))
RtlSetBits( &bitMask, *(format - 1) +1 , *(format + 1) - *(format - 1) );
else
RtlSetBits( &bitMask, *(format + 1) , *(format - 1) - *(format + 1) );
format++;
}
else
RtlSetBits( &bitMask, *format, 1 );
format++;
}
/* read until char is not suitable */
while (width != 0 && nch != '\0')
{
if (!invert)
{
if(RtlAreBitsSet( &bitMask, nch, 1 ))
{
if (!suppress) *sptr++ = nch;
}
else
break;
}
else
{
if (RtlAreBitsClear( &bitMask, nch, 1 ))
{
if (!suppress) *sptr++ = nch;
}
else
break;
}
st++;
nch = (consumed++, *str++);
if (width > 0) width--;
if(size > 1) size--;
else
{
*str = 0;
return rd;
}
}
/* terminate */
if (!suppress) *sptr = 0;
}
break;
default:
/* From spec: "if a percent sign is followed by a character
* that has no meaning as a format-control character, that
* character and the following characters are treated as
* an ordinary sequence of characters, that is, a sequence
* of characters that must match the input. For example,
* to specify that a percent-sign character is to be input,
* use %%." */
while (nch != '\0' && isspace( nch ))
nch = (consumed++, *str++);
if (nch == *format)
{
suppress = TRUE; /* whoops no field to be read */
st = 1; /* but we got what we expected */
nch = (consumed++, *str++);
}
break;
}
if (st && !suppress) rd++;
else if (!st) break;
}
/* A non-white-space character causes scanf to read, but not store,
* a matching non-white-space character. */
else
{
if (nch == *format)
nch = (consumed++, *str++);
else break;
}
format++;
}
if (nch != '\0')
{
consumed--, str--;
}
return rd;
}
/*********************************************************************
* sscanf (NTDLL.@)
*/
int __cdecl NTDLL_sscanf( const char *str, const char *format, ... )
{
int ret;
va_list valist;
va_start( valist, format );
ret = vsscanf( str, format, valist );
va_end( valist );
__ms_va_list valist;
__ms_va_start( valist, format );
ret = NTDLL_vsscanf( str, format, valist );
__ms_va_end( valist );
return ret;
}
......
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