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Handle unknown format chars correctly (spotted by György 'Nog' 

Jeney) and added test for it.
Removed unneeded _L_ macro.
This commit is contained in:
Alexandre Julliard 2002-12-20 00:35:41 +00:00
parent 18a79c8b69
commit 7ea8a0b9be
2 changed files with 60 additions and 59 deletions
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112
dlls/msvcrt/scanf.h
View File

@ -24,7 +24,6 @@
*/
#ifdef WIDE_SCANF
#define _L_(x) L##x
#define _CHAR_ MSVCRT_wchar_t
#define _EOF_ MSVCRT_WEOF
#define _ISSPACE_(c) MSVCRT_iswspace(c)
@ -32,7 +31,6 @@
#define _CONVERT_(c) c /*** FIXME ***/
#define _CHAR2DIGIT_(c, base) wchar2digit((c), (base))
#else /* WIDE_SCANF */
#define _L_(x) x
#define _CHAR_ char
#define _EOF_ MSVCRT_EOF
#define _ISSPACE_(c) isspace(c)
@ -108,7 +106,7 @@ int _FUNCTION_ {
* in the input into values of a specified type. The value is assigned
* to an argument in the argument list. Format specifications have
* the form %[*][width][{h | l | I64 | L}]type */
else if (*format == _L_('%')) {
else if (*format == '%') {
int st = 0; int suppress = 0; int width = 0;
int base, number_signed;
int h_prefix = 0;
@ -120,26 +118,26 @@ int _FUNCTION_ {
format++;
/* look for leading asterisk, which means 'suppress assignment of
* this field'. */
if (*format==_L_('*')) {
if (*format=='*') {
format++;
suppress=1;
}
/* look for width specification */
while (_ISDIGIT_(*format)) {
width*=10;
width+=*format++ - _L_('0');
width+=*format++ - '0';
}
if (width==0) width=-1; /* no width spec seen */
/* read prefix (if any) */
while (!prefix_finished) {
switch(*format) {
case _L_('h'): h_prefix = 1; break;
case _L_('l'): l_prefix = 1; break;
case _L_('w'): w_prefix = 1; break;
case _L_('L'): L_prefix = 1; break;
case _L_('I'):
if (*(format + 1) == _L_('6') &&
*(format + 2) == _L_('4')) {
case 'h': h_prefix = 1; break;
case 'l': l_prefix = 1; break;
case 'w': w_prefix = 1; break;
case 'L': L_prefix = 1; break;
case 'I':
if (*(format + 1) == '6' &&
*(format + 2) == '4') {
/* I64_prefix = 1; */
format += 2;
FIXME("I64 prefix currently not implemented in fscanf/fwscanf");
@ -152,30 +150,20 @@ int _FUNCTION_ {
}
/* read type */
switch(*format) {
case _L_('%'): { /* read a percent symbol */
while ((nch!=_EOF_) && _ISSPACE_(nch))
nch = _GETC_(file);
if (nch==_L_('%')) {
suppress = 1; /* whoops no field to be read */
st = 1; /* but we got what we expected */
nch = _GETC_(file);
}
}
break;
case _L_('x'):
case _L_('X'): /* hexadecimal integer. */
case 'x':
case 'X': /* hexadecimal integer. */
base = 16; number_signed = 0;
goto number;
case _L_('o'): /* octal integer */
case 'o': /* octal integer */
base = 8; number_signed = 0;
goto number;
case _L_('u'): /* unsigned decimal integer */
case 'u': /* unsigned decimal integer */
base = 10; number_signed = 0;
goto number;
case _L_('d'): /* signed decimal integer */
case 'd': /* signed decimal integer */
base = 10; number_signed = 1;
goto number;
case _L_('i'): /* generic integer */
case 'i': /* generic integer */
base = 0; number_signed = 1;
number: {
/* read an integer */
@ -186,18 +174,18 @@ int _FUNCTION_ {
while ((nch!=_EOF_) && _ISSPACE_(nch))
nch = _GETC_(file);
/* get sign */
if (number_signed && (nch == _L_('-') ||
nch == _L_('+'))) {
negative = (nch==_L_('-'));
if (number_signed && (nch == '-' ||
nch == '+')) {
negative = (nch=='-');
nch = _GETC_(file);
if (width>0) width--;
}
/* look for leading indication of base */
if (width!=0 && nch == _L_('0')) {
if (width!=0 && nch == '0') {
nch = _GETC_(file);
if (width>0) width--;
seendigit=1;
if (width!=0 && (nch==_L_('x') || nch==_L_('X'))) {
if (width!=0 && (nch=='x' || nch=='X')) {
if (base==0)
base=16;
if (base==16) {
@ -209,7 +197,7 @@ int _FUNCTION_ {
base = 8;
}
/* throw away leading zeros */
while (width!=0 && nch==_L_('0')) {
while (width!=0 && nch=='0') {
nch = _GETC_(file);
if (width>0) width--;
seendigit=1;
@ -249,62 +237,62 @@ int _FUNCTION_ {
}
}
break;
case _L_('e'):
case _L_('E'):
case _L_('f'):
case _L_('g'):
case _L_('G'): { /* read a float */
case 'e':
case 'E':
case 'f':
case 'g':
case 'G': { /* read a float */
long double cur = 0;
int negative = 0;
/* skip initial whitespace */
while ((nch!=_EOF_) && _ISSPACE_(nch))
nch = _GETC_(file);
/* get sign. */
if (nch == _L_('-') || nch == _L_('+')) {
negative = (nch==_L_('-'));
if (nch == '-' || nch == '+') {
negative = (nch=='-');
if (width>0) width--;
if (width==0) break;
nch = _GETC_(file);
}
/* get first digit. */
if (!_ISDIGIT_(nch)) break;
cur = (nch - _L_('0')) * (negative ? -1 : 1);
cur = (nch - '0') * (negative ? -1 : 1);
nch = _GETC_(file);
if (width>0) width--;
/* read until no more digits */
while (width!=0 && (nch!=_EOF_) && _ISDIGIT_(nch)) {
cur = cur*10 + (nch - _L_('0'));
cur = cur*10 + (nch - '0');
nch = _GETC_(file);
if (width>0) width--;
}
/* handle decimals */
if (width!=0 && nch == _L_('.')) {
if (width!=0 && nch == '.') {
float dec = 1;
nch = _GETC_(file);
if (width>0) width--;
while (width!=0 && (nch!=_EOF_) && _ISDIGIT_(nch)) {
dec /= 10;
cur += dec * (nch - _L_('0'));
cur += dec * (nch - '0');
nch = _GETC_(file);
if (width>0) width--;
}
}
/* handle exponent */
if (width!=0 && (nch == _L_('e') || nch == _L_('E'))) {
if (width!=0 && (nch == 'e' || nch == 'E')) {
int exponent = 0, negexp = 0;
float expcnt;
nch = _GETC_(file);
if (width>0) width--;
/* possible sign on the exponent */
if (width!=0 && (nch==_L_('+') || nch==_L_('-'))) {
negexp = (nch==_L_('-'));
if (width!=0 && (nch=='+' || nch=='-')) {
negexp = (nch=='-');
nch = _GETC_(file);
if (width>0) width--;
}
/* exponent digits */
while (width!=0 && (nch!=_EOF_) && _ISDIGIT_(nch)) {
exponent *= 10;
exponent += (nch - _L_('0'));
exponent += (nch - '0');
nch = _GETC_(file);
if (width>0) width--;
}
@ -332,7 +320,7 @@ int _FUNCTION_ {
* call to fwscanf. The 'h', 'w' and 'l' prefixes override
* this behaviour. 'h' forces reading char * but 'l' and 'w'
* force reading WCHAR. */
case _L_('s'):
case 's':
if (w_prefix || l_prefix) goto widecharstring;
else if (h_prefix) goto charstring;
#ifdef WIDE_SCANF
@ -340,7 +328,7 @@ int _FUNCTION_ {
#else /* WIDE_SCANF */
else goto charstring;
#endif /* WIDE_SCANF */
case _L_('S'):
case 'S':
if (w_prefix || l_prefix) goto widecharstring;
else if (h_prefix) goto charstring;
#ifdef WIDE_SCANF
@ -393,7 +381,7 @@ int _FUNCTION_ {
break;
/* 'c' and 'C work analogously to 's' and 'S' as described
* above */
case _L_('c'):
case 'c':
if (w_prefix || l_prefix) goto widecharacter;
else if (h_prefix) goto character;
#ifdef WIDE_SCANF
@ -401,7 +389,7 @@ int _FUNCTION_ {
#else /* WIDE_SCANF */
else goto character;
#endif /* WIDE_SCANF */
case _L_('C'):
case 'C':
if (w_prefix || l_prefix) goto widecharacter;
else if (h_prefix) goto character;
#ifdef WIDE_SCANF
@ -435,14 +423,14 @@ int _FUNCTION_ {
nch = _GETC_(file);
}
break;
case _L_('n'): {
case 'n': {
if (!suppress) {
int*n = va_arg(ap, int*);
*n = rd;
}
}
break;
case _L_('['): {
case '[': {
_CHAR_ *str = suppress ? NULL : va_arg(ap, _CHAR_*);
_CHAR_ *sptr = str;
RTL_BITMAP bitMask;
@ -508,15 +496,22 @@ int _FUNCTION_ {
HeapFree(GetProcessHeap(), 0, Mask);
}
break;
default: FIXME("unhandled: %%%c\n", *format);
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 %%."
* LEAVING AS-IS because we catch bugs better that way. */
* use %%." */
while ((nch!=_EOF_) && _ISSPACE_(nch))
nch = _GETC_(file);
if (nch==*format) {
suppress = 1; /* whoops no field to be read */
st = 1; /* but we got what we expected */
nch = _GETC_(file);
}
break;
}
if (st && !suppress) rd++;
else if (!st) break;
@ -539,7 +534,6 @@ int _FUNCTION_ {
return rd;
}
#undef _L_
#undef _CHAR_
#undef _EOF_
#undef _ISSPACE_

7
dlls/msvcrt/tests/scanf.c
View File

@ -25,6 +25,7 @@
static void test_sscanf( void )
{
char buffer[100];
char format[20];
int result;
strcpy(buffer,"0x519");
@ -38,6 +39,12 @@ static void test_sscanf( void )
strcpy(buffer,"0x51g");
ok( sscanf(buffer, "%x", &result) == 1, "sscanf failed" );
ok( result == 0x51, "sscanf reads %x instead of %x", result, 0x51 );
/* check % followed by any char */
strcpy(buffer,"\"%12@");
strcpy(format,"%\"%%%d%@"); /* work around gcc format check */
ok( sscanf(buffer, format, &result) == 1, "sscanf failed" );
ok( result == 12, "sscanf reads %x instead of %x", result, 12 );
}