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Commit 7c369a24 authored by konstantin@mysql.com's avatar konstantin@mysql.com
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More work on truncations in libmysql: after-review fixes.

parent a2c9c8ea
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Showing with 54 additions and 67 deletions
libmysql/libmysql.c
View file @ 7c369a24
......@@ -3428,7 +3428,7 @@ static void fetch_string_with_conversion(MYSQL_BIND *param, char *value,
{
char *buffer= (char *)param->buffer;
int err= 0;
char *endptr;
char *endptr= value + length;
/*
This function should support all target buffer types: the rest
......@@ -3439,39 +3439,33 @@ static void fetch_string_with_conversion(MYSQL_BIND *param, char *value,
break;
case MYSQL_TYPE_TINY:
{
longlong data= my_strntoll(&my_charset_latin1, value, length, 10,
&endptr, &err);
longlong data= my_strtoll10(value, &endptr, &err);
*param->error= (IS_TRUNCATED(data, param->is_unsigned,
INT_MIN8, INT_MAX8, UINT_MAX8) |
test(err));
INT_MIN8, INT_MAX8, UINT_MAX8) || err > 0);
*buffer= (uchar) data;
break;
}
case MYSQL_TYPE_SHORT:
{
longlong data= my_strntoll(&my_charset_latin1, value, length, 10,
&endptr, &err);
longlong data= my_strtoll10(value, &endptr, &err);
*param->error= (IS_TRUNCATED(data, param->is_unsigned,
INT_MIN16, INT_MAX16, UINT_MAX16) |
test(err));
INT_MIN16, INT_MAX16, UINT_MAX16) || err > 0);
shortstore(buffer, (short) data);
break;
}
case MYSQL_TYPE_LONG:
{
longlong data= my_strntoll(&my_charset_latin1, value, length, 10,
&endptr, &err);
longlong data= my_strtoll10(value, &endptr, &err);
*param->error= (IS_TRUNCATED(data, param->is_unsigned,
INT_MIN32, INT_MAX32, UINT_MAX32) |
test(err));
INT_MIN32, INT_MAX32, UINT_MAX32) || err > 0);
longstore(buffer, (int32) data);
break;
}
case MYSQL_TYPE_LONGLONG:
{
longlong data= my_strntoll(&my_charset_latin1, value, length, 10,
&endptr, &err);
*param->error= test(err);
longlong data= my_strtoll10(value, &endptr, &err);
*param->error= param->is_unsigned ? err != 0 :
(err > 0 || (err == 0 && data < 0));
longlongstore(buffer, data);
break;
}
......@@ -3554,10 +3548,9 @@ static void fetch_string_with_conversion(MYSQL_BIND *param, char *value,
*/
static void fetch_long_with_conversion(MYSQL_BIND *param, MYSQL_FIELD *field,
longlong value)
longlong value, my_bool is_unsigned)
{
char *buffer= (char *)param->buffer;
uint field_is_unsigned= field->flags & UNSIGNED_FLAG;
switch (param->buffer_type) {
case MYSQL_TYPE_NULL: /* do nothing */
......@@ -3579,38 +3572,38 @@ static void fetch_long_with_conversion(MYSQL_BIND *param, MYSQL_FIELD *field,
break;
case MYSQL_TYPE_LONGLONG:
longlongstore(buffer, value);
*param->error= param->is_unsigned != is_unsigned && value < 0;
break;
case MYSQL_TYPE_FLOAT:
{
/*
We need to store data in the buffer before the truncation check to
workaround Intel FPU executive precision feature.
(See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=323 for details)
AFAIU it does not guarantee to work.
*/
float data;
if (field_is_unsigned)
{
if (is_unsigned)
data= (float) ulonglong2double(value);
*param->error= (ulonglong) data != (ulonglong) value;
}
else
{
data= (float) value;
/* printf("%lld, %f\n", value, data); */
*param->error= value != ((longlong) data);
}
floatstore(buffer, data);
*param->error= is_unsigned ?
((ulonglong) value) != ((ulonglong) (*(float*) buffer)) :
((longlong) value) != ((longlong) (*(float*) buffer));
break;
}
case MYSQL_TYPE_DOUBLE:
{
double data;
if (field_is_unsigned)
{
if (is_unsigned)
data= ulonglong2double(value);
*param->error= (ulonglong) data != (ulonglong) value;
}
else
{
data= value;
*param->error= (longlong) data != value;
}
doublestore(buffer, data);
*param->error= is_unsigned ?
((ulonglong) value) != ((ulonglong) (*(double*) buffer)) :
((longlong) value) != ((longlong) (*(double*) buffer));
break;
}
case MYSQL_TYPE_TIME:
......@@ -3626,7 +3619,7 @@ static void fetch_long_with_conversion(MYSQL_BIND *param, MYSQL_FIELD *field,
default:
{
char buff[22]; /* Enough for longlong */
char *end= longlong10_to_str(value, buff, field_is_unsigned ? 10: -10);
char *end= longlong10_to_str(value, buff, is_unsigned ? 10: -10);
/* Resort to string conversion which supports all typecodes */
uint length= (uint) (end-buff);
......@@ -3665,74 +3658,67 @@ static void fetch_float_with_conversion(MYSQL_BIND *param, MYSQL_FIELD *field,
case MYSQL_TYPE_NULL: /* do nothing */
break;
case MYSQL_TYPE_TINY:
{
/*
We need to _store_ data in the buffer before the truncation check to
workaround Intel FPU executive precision feature.
(See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=323 for details)
Sic: AFAIU it does not guarantee to work.
*/
if (param->is_unsigned)
{
int8 data= (int8) value;
*param->error= (double) data != value;
*buffer= (uchar) data;
}
*buffer= (uint8) value;
else
{
uchar data= (uchar) value;
*param->error= (double) data != value;
*buffer= data;
}
*buffer= (int8) value;
*param->error= value != (param->is_unsigned ? (double) ((uint8) *buffer) :
(double) ((int8) *buffer));
break;
}
case MYSQL_TYPE_SHORT:
{
if (param->is_unsigned)
{
ushort data= (ushort) value;
*param->error= (double) data != value;
shortstore(buffer, data);
}
else
{
short data= (short) value;
*param->error= (double) data != value;
shortstore(buffer, data);
}
*param->error= value != (param->is_unsigned ? (double) (*(ushort*) buffer):
(double) (*(short*) buffer));
break;
}
case MYSQL_TYPE_LONG:
{
if (param->is_unsigned)
{
uint32 data= (uint32) value;
*param->error= (double) data != value;
longstore(buffer, data);
}
else
{
int32 data= (int32) value;
*param->error= (double) data != value;
longstore(buffer, data);
}
break;
}
*param->error= value != (param->is_unsigned ? (double) (*(uint32*) buffer):
(double) (*(int32*) buffer));
break;
case MYSQL_TYPE_LONGLONG:
{
if (param->is_unsigned)
{
ulonglong data= (ulonglong) value;
*param->error= (double) data != value;
longlongstore(buffer, data);
}
else
{
longlong data= (longlong) value;
*param->error= (double) data != value;
longlongstore(buffer, data);
}
*param->error= value != (param->is_unsigned ?
(double) (*(ulonglong*) buffer) :
(double) (*(longlong*) buffer));
break;
}
case MYSQL_TYPE_FLOAT:
{
float data= (float) value;
*param->error= data != value;
floatstore(buffer, data);
*param->error= (*(float*) buffer) != value;
break;
}
case MYSQL_TYPE_DOUBLE:
......@@ -3824,7 +3810,7 @@ static void fetch_datetime_with_conversion(MYSQL_BIND *param,
case MYSQL_TYPE_LONGLONG:
{
longlong value= (longlong) TIME_to_ulonglong(time);
fetch_long_with_conversion(param, field, value);
fetch_long_with_conversion(param, field, value, TRUE);
break;
}
default:
......@@ -3872,7 +3858,7 @@ static void fetch_result_with_conversion(MYSQL_BIND *param, MYSQL_FIELD *field,
/* sic: we need to cast to 'signed char' as 'char' may be unsigned */
longlong data= field_is_unsigned ? (longlong) value :
(longlong) (signed char) value;
fetch_long_with_conversion(param, field, data);
fetch_long_with_conversion(param, field, data, 0);
*row+= 1;
break;
}
......@@ -3882,7 +3868,7 @@ static void fetch_result_with_conversion(MYSQL_BIND *param, MYSQL_FIELD *field,
short value= sint2korr(*row);
longlong data= field_is_unsigned ? (longlong) (unsigned short) value :
(longlong) value;
fetch_long_with_conversion(param, field, data);
fetch_long_with_conversion(param, field, data, 0);
*row+= 2;
break;
}
......@@ -3892,14 +3878,15 @@ static void fetch_result_with_conversion(MYSQL_BIND *param, MYSQL_FIELD *field,
long value= sint4korr(*row);
longlong data= field_is_unsigned ? (longlong) (unsigned long) value :
(longlong) value;
fetch_long_with_conversion(param, field, data);
fetch_long_with_conversion(param, field, data, 0);
*row+= 4;
break;
}
case MYSQL_TYPE_LONGLONG:
{
longlong value= (longlong)sint8korr(*row);
fetch_long_with_conversion(param, field, value);
fetch_long_with_conversion(param, field, value,
field->flags & UNSIGNED_FLAG);
*row+= 8;
break;
}
......
strings/my_strtoll10.c
View file @ 7c369a24
......@@ -46,7 +46,7 @@ static unsigned long lfactor[9]=
from string nptr and converts it to an signed or unsigned
long long integer value.
Space characters and tab are ignored.
A sign character might precede the the digit characters. The number
A sign character might precede the digit characters. The number
may have any number of pre-zero digits.
The function stops reading the string nptr at the first character
......
tests/client_test.c
View file @ 7c369a24
......@@ -12240,7 +12240,7 @@ static void test_truncation()
/* int -> float: truncation, not enough bits in float */
DIE_UNLESS(++bind < bind_array + bind_count);
/* do nothing: due to a gcc bug result here is not predictable */
DIE_UNLESS(*bind->error);
/* int -> double: no truncation */
DIE_UNLESS(++bind < bind_array + bind_count);
......
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