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msvcrt: Fix reading of signed numbers with unsigned read types in scanf.

This commit is contained in:
H. Verbeet 2006-03-26 04:10:28 +02:00 committed by Alexandre Julliard
parent 19a088202a
commit 8c29b7dc8b
2 changed files with 36 additions and 24 deletions
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35
dlls/msvcrt/scanf.h
View File

@ -114,7 +114,7 @@ _FUNCTION_ {
* the form %[*][width][{h | l | I64 | L}]type */
else if (*format == '%') {
int st = 0; int suppress = 0; int width = 0;
int base, number_signed;
int base;
int h_prefix = 0;
int l_prefix = 0;
int L_prefix = 0;
@ -157,19 +157,19 @@ _FUNCTION_ {
switch(*format) {
case 'x':
case 'X': /* hexadecimal integer. */
base = 16; number_signed = 0;
base = 16;
goto number;
case 'o': /* octal integer */
base = 8; number_signed = 0;
base = 8;
goto number;
case 'u': /* unsigned decimal integer */
base = 10; number_signed = 0;
base = 10;
goto number;
case 'd': /* signed decimal integer */
base = 10; number_signed = 1;
base = 10;
goto number;
case 'i': /* generic integer */
base = 10; number_signed = 1;
base = 10;
number: {
/* read an integer */
ULONGLONG cur = 0;
@ -179,8 +179,7 @@ _FUNCTION_ {
while ((nch!=_EOF_) && _ISSPACE_(nch))
nch = _GETC_(file);
/* get sign */
if (number_signed && (nch == '-' ||
nch == '+')) {
if (nch == '-' || nch == '+') {
negative = (nch=='-');
nch = _GETC_(file);
if (width>0) width--;
@ -225,22 +224,10 @@ _FUNCTION_ {
st = 1;
if (!suppress) {
#define _SET_NUMBER_(type) *va_arg(ap, type*) = negative ? -cur : cur
if (number_signed) {
if (I64_prefix) _SET_NUMBER_(LONGLONG);
else if (l_prefix) _SET_NUMBER_(long int);
else if (h_prefix) _SET_NUMBER_(short int);
else _SET_NUMBER_(int);
} else {
if (negative) {
WARN("Dropping sign in reading a negative number into an unsigned value");
negative = 0;
}
if (I64_prefix) _SET_NUMBER_(ULONGLONG);
else if (l_prefix) _SET_NUMBER_(unsigned long int);
else if (h_prefix)
_SET_NUMBER_(unsigned short int);
else _SET_NUMBER_(unsigned int);
}
if (I64_prefix) _SET_NUMBER_(LONGLONG);
else if (l_prefix) _SET_NUMBER_(long int);
else if (h_prefix) _SET_NUMBER_(short int);
else _SET_NUMBER_(int);
}
}
break;

25
dlls/msvcrt/tests/scanf.c
View File

@ -52,6 +52,11 @@ static void test_sscanf( void )
ok( sscanf(buffer, "%x", &result) == 1, "sscanf failed\n" );
ok( result == 0x51, "sscanf reads %x instead of %x\n", result, 0x51 );
result = 0;
ret = sscanf("-1", "%x", &result);
ok(ret == 1, "Wrong number of arguments read: %d (expected 1)\n", ret);
ok(result == -1, "Read %d, expected -1\n", result);
/* check % followed by any char */
strcpy(buffer,"\"%12@");
strcpy(format,"%\"%%%d%@"); /* work around gcc format check */
@ -93,9 +98,29 @@ static void test_sscanf( void )
ret = sscanf(buffer, "%i", &result);
ok(ret == 1, "Wrong number of arguments read: %d\n", ret);
ok(result == 123, "Wrong number read\n");
result = 0;
ret = sscanf("-1", "%i", &result);
ok(ret == 1, "Wrong number of arguments read: %d (expected 1)\n", ret);
ok(result == -1, "Read %d, expected -1\n", result);
ret = sscanf(buffer, "%d", &result);
ok(ret == 1, "Wrong number of arguments read: %d\n", ret);
ok(result == 123, "Wrong number read\n");
result = 0;
ret = sscanf("-1", "%d", &result);
ok(ret == 1, "Wrong number of arguments read: %d (expected 1)\n", ret);
ok(result == -1, "Read %d, expected -1\n", result);
/* %o */
result = 0;
ret = sscanf("-1", "%o", &result);
ok(ret == 1, "Wrong number of arguments read: %d (expected 1)\n", ret);
ok(result == -1, "Read %d, expected -1\n", result);
/* %u */
result = 0;
ret = sscanf("-1", "%u", &result);
ok(ret == 1, "Wrong number of arguments read: %d (expected 1)\n", ret);
ok(result == -1, "Read %d, expected -1\n", result);
/* Check %c */
strcpy(buffer,"a");