database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-06-12 01:53:02 +03:00
Code Activity

Cleanup in libmysql.

Browse Source 
libmysql/libmysql.c:
  Cleanup of conversion part of libmysql (prepared statements protocol):
  - now we have basic support for any conversion sequence:
    when we don't implement direct conversion of given value to requested 
    buffer type (i.e. time -> double, or the other way around) we
    first convert i.e. time -> string and then call string -> double 
    conversion.
    param->offset is now handled only in one place.
  - conversion functions renamed from send_data_{string, long, double}
    to fetch_{string,long,double}_with_conversion. Don't be confused
    with strange diff for send_data_long: I had to move send_data_string
    before all other sends as it's used inside thesm. (Shall we have
    a forward declaration instead?-)
  - a little cleanup in read_binary_{date,time,datetime} - now type of
    date value is set inside these functions, so we can be sure
    that we always return fully filled MYSQL_TIME structure to the user
  - float -> string conversion is fixed to honor param->precision. 
    This is a step forward in fixing bug#4172
tests/client_test.c:
  test fix: now libmysql always sets MYSQL_TIME::time_type field.
  We need to set these fields in the test as later _in values are compared
  with canonical by plain memcmp.
This commit is contained in:
unknown
2004-08-05 02:43:18 -07:00
parent 61528cf2d8
commit f47a0b9f29
2 changed files with 272 additions and 209 deletions
Download Patch File Download Diff File Expand all files Collapse all files

475
libmysql/libmysql.c
View File

@ -3018,6 +3018,7 @@ mysql_stmt_send_long_data(MYSQL_STMT *stmt, uint param_number,
static void set_zero_time(MYSQL_TIME *tm)
{
bzero((void *)tm, sizeof(*tm));
tm->time_type= MYSQL_TIMESTAMP_NONE;
}
@ -3041,86 +3042,203 @@ static void set_zero_time(MYSQL_TIME *tm)
static uint read_binary_time(MYSQL_TIME *tm, uchar **pos)
{
uchar *to;
uint length;
/* net_field_length will set pos to the first byte of data */
if (!(length= net_field_length(pos)))
{
set_zero_time(tm);
return 0;
else
{
uchar *to= *pos;
tm->neg= (bool) to[0];
tm->day= (ulong) sint4korr(to+1);
tm->hour= (uint) to[5];
tm->minute= (uint) to[6];
tm->second= (uint) to[7];
tm->second_part= (length > 8) ? (ulong) sint4korr(to+8) : 0;
tm->year= tm->month= 0;
tm->time_type= MYSQL_TIMESTAMP_TIME;
}
to= *pos;
tm->neg= (bool) to[0];
tm->day= (ulong) sint4korr(to+1);
tm->hour= (uint) to[5];
tm->minute= (uint) to[6];
tm->second= (uint) to[7];
tm->second_part= (length > 8) ? (ulong) sint4korr(to+8) : 0;
tm->year= tm->month= 0;
return length;
}
static uint read_binary_datetime(MYSQL_TIME *tm, uchar **pos)
{
uchar *to;
uint length;
if (!(length= net_field_length(pos)))
{
set_zero_time(tm);
return 0;
}
to= *pos;
tm->neg= 0;
tm->year= (uint) sint2korr(to);
tm->month= (uint) to[2];
tm->day= (uint) to[3];
if (length > 4)
{
tm->hour= (uint) to[4];
tm->minute= (uint) to[5];
tm->second= (uint) to[6];
}
else
tm->hour= tm->minute= tm->second= 0;
tm->second_part= (length > 7) ? (ulong) sint4korr(to+7) : 0;
{
uchar *to= *pos;
tm->neg= 0;
tm->year= (uint) sint2korr(to);
tm->month= (uint) to[2];
tm->day= (uint) to[3];
if (length > 4)
{
tm->hour= (uint) to[4];
tm->minute= (uint) to[5];
tm->second= (uint) to[6];
}
else
tm->hour= tm->minute= tm->second= 0;
tm->second_part= (length > 7) ? (ulong) sint4korr(to+7) : 0;
tm->time_type= MYSQL_TIMESTAMP_DATETIME;
}
return length;
}
static uint read_binary_date(MYSQL_TIME *tm, uchar **pos)
{
uchar *to;
uint length;
if (!(length= net_field_length(pos)))
{
set_zero_time(tm);
return 0;
else
{
uchar *to= *pos;
tm->year = (uint) sint2korr(to);
tm->month= (uint) to[2];
tm->day= (uint) to[3];
tm->hour= tm->minute= tm->second= 0;
tm->second_part= 0;
tm->neg= 0;
tm->time_type= MYSQL_TIMESTAMP_DATE;
}
to= *pos;
tm->year = (uint) sint2korr(to);
tm->month= (uint) to[2];
tm->day= (uint) to[3];
tm->hour= tm->minute= tm->second= 0;
tm->second_part= 0;
tm->neg= 0;
return length;
}
/* Convert integer value to client buffer type. */
/*
Convert string to supplied buffer of any type.
static void send_data_long(MYSQL_BIND *param, MYSQL_FIELD *field,
longlong value)
SYNOPSIS
fetch_string_with_conversion()
param output buffer descriptor
value column data
length data length
*/
static void fetch_string_with_conversion(MYSQL_BIND *param, char *value,
uint length)
{
char *buffer= (char *)param->buffer;
int err= 0;
/*
This function should support all target buffer types: the rest
of conversion functions can delegate conversion to it.
*/
switch(param->buffer_type) {
case MYSQL_TYPE_NULL: /* do nothing */
break;
case MYSQL_TYPE_TINY:
{
uchar data= (uchar) my_strntol(&my_charset_latin1, value, length, 10,
NULL, &err);
*buffer= data;
break;
}
case MYSQL_TYPE_SHORT:
{
short data= (short) my_strntol(&my_charset_latin1, value, length, 10,
NULL, &err);
shortstore(buffer, data);
break;
}
case MYSQL_TYPE_LONG:
{
int32 data= (int32)my_strntol(&my_charset_latin1, value, length, 10,
NULL, &err);
longstore(buffer, data);
break;
}
case MYSQL_TYPE_LONGLONG:
{
longlong data= my_strntoll(&my_charset_latin1, value, length, 10,
NULL, &err);
longlongstore(buffer, data);
break;
}
case MYSQL_TYPE_FLOAT:
{
float data = (float) my_strntod(&my_charset_latin1, value, length,
NULL, &err);
floatstore(buffer, data);
break;
}
case MYSQL_TYPE_DOUBLE:
{
double data= my_strntod(&my_charset_latin1, value, length, NULL, &err);
doublestore(buffer, data);
break;
}
case MYSQL_TYPE_TIME:
{
MYSQL_TIME *tm= (MYSQL_TIME *)buffer;
str_to_time(value, length, tm, &err);
break;
}
case MYSQL_TYPE_DATE:
case MYSQL_TYPE_DATETIME:
{
MYSQL_TIME *tm= (MYSQL_TIME *)buffer;
str_to_datetime(value, length, tm, 0, &err);
break;
}
case MYSQL_TYPE_TINY_BLOB:
case MYSQL_TYPE_MEDIUM_BLOB:
case MYSQL_TYPE_LONG_BLOB:
case MYSQL_TYPE_BLOB:
default:
{
/*
Copy column data to the buffer taking into account offset,
data length and buffer length.
*/
char *start= value + param->offset;
char *end= value + length;
ulong copy_length;
if (start < end)
{
copy_length= end - start;
/* We've got some data beyond offset: copy up to buffer_length bytes */
if (param->buffer_length)
memcpy(buffer, start, min(copy_length, param->buffer_length));
}
else
copy_length= 0;
if (copy_length < param->buffer_length)
buffer[copy_length]= '\0';
/*
param->length will always contain length of entire column;
number of copied bytes may be way different:
*/
*param->length= length;
break;
}
}
}
/*
Convert integer value to client buffer of any type.
SYNOPSIS
fetch_long_with_conversion()
param output buffer descriptor
field column metadata
value column data
*/
static void fetch_long_with_conversion(MYSQL_BIND *param, MYSQL_FIELD *field,
longlong value)
{
char *buffer= (char *)param->buffer;
uint field_is_unsigned= (field->flags & UNSIGNED_FLAG);
@ -3142,45 +3260,47 @@ static void send_data_long(MYSQL_BIND *param, MYSQL_FIELD *field,
break;
case MYSQL_TYPE_FLOAT:
{
float data= (field_is_unsigned ? (float) ulonglong2double(value) :
(float) value);
float data= field_is_unsigned ? (float) ulonglong2double(value) :
(float) value;
floatstore(buffer, data);
break;
}
case MYSQL_TYPE_DOUBLE:
{
double data= (field_is_unsigned ? ulonglong2double(value) :
(double) value);
double data= field_is_unsigned ? ulonglong2double(value) :
(double) value;
doublestore(buffer, data);
break;
}
default:
{
char tmp[22]; /* Enough for longlong */
uint length= (uint)(longlong10_to_str(value,(char *)tmp,
field_is_unsigned ? 10: -10) -
tmp);
ulong copy_length= min((ulong)length-param->offset, param->buffer_length);
if ((long) copy_length < 0)
copy_length=0;
else
memcpy(buffer, (char *)tmp+param->offset, copy_length);
*param->length= length;
if (copy_length != param->buffer_length)
*(buffer+copy_length)= '\0';
char buff[22]; /* Enough for longlong */
char *end= longlong10_to_str(value, buff, field_is_unsigned ? 10: -10);
/* Resort to string conversion which supports all typecodes */
return fetch_string_with_conversion(param, buff, end - buff);
}
}
}
/* Convert Double to buffer types */
/*
Convert double/float column to supplied buffer of any type.
static void send_data_double(MYSQL_BIND *param, double value)
SYNOPSIS
fetch_float_with_conversion()
param output buffer descriptor
field column metadata
value column data
width default number of significant digits used when converting
float/double to string
*/
static void fetch_float_with_conversion(MYSQL_BIND *param, MYSQL_FIELD *field,
double value, int width)
{
char *buffer= (char *)param->buffer;
switch(param->buffer_type) {
switch (param->buffer_type) {
case MYSQL_TYPE_NULL: /* do nothing */
break;
case MYSQL_TYPE_TINY:
@ -3211,167 +3331,108 @@ static void send_data_double(MYSQL_BIND *param, double value)
}
default:
{
char tmp[128];
uint length= my_sprintf(tmp,(tmp,"%g",value));
ulong copy_length= min((ulong)length-param->offset, param->buffer_length);
if ((long) copy_length < 0)
copy_length=0;
/*
Resort to fetch_string_with_conversion: this should handle
floating point -> string conversion nicely, honor all typecodes
and param->offset possibly set in mysql_stmt_fetch_column
*/
char buff[331];
char *end;
/* TODO: move this to a header shared between client and server. */
#define NOT_FIXED_DEC 31
if (field->decimals >= 31)
#undef NOT_FIXED_DEC
{
sprintf(buff, "%-*.*g", (int) param->buffer_length, width, value);
end= strcend(buff, ' ');
*end= 0;
}
else
memcpy(buffer, (char *)tmp+param->offset, copy_length);
*param->length= length;
if (copy_length != param->buffer_length)
*(buffer+copy_length)= '\0';
{
sprintf(buff, "%.*f", field->decimals, value);
end= strend(buff);
}
return fetch_string_with_conversion(param, buff, end - buff);
}
}
}
/* Convert string to buffer types */
/*
Fetch time/date/datetime to supplied buffer of any type
static void send_data_str(MYSQL_BIND *param, char *value, uint length)
{
char *buffer= (char *)param->buffer;
int err=0;
SYNOPSIS
param output buffer descriptor
time column data
*/
switch(param->buffer_type) {
case MYSQL_TYPE_NULL: /* do nothing */
break;
case MYSQL_TYPE_TINY:
{
uchar data= (uchar)my_strntol(&my_charset_latin1,value,length,10,NULL,
&err);
*buffer= data;
break;
}
case MYSQL_TYPE_SHORT:
{
short data= (short)my_strntol(&my_charset_latin1,value,length,10,NULL,
&err);
shortstore(buffer, data);
break;
}
case MYSQL_TYPE_LONG:
{
int32 data= (int32)my_strntol(&my_charset_latin1,value,length,10,NULL,
&err);
longstore(buffer, data);
break;
}
case MYSQL_TYPE_LONGLONG:
{
longlong data= my_strntoll(&my_charset_latin1,value,length,10,NULL,&err);
longlongstore(buffer, data);
break;
}
case MYSQL_TYPE_FLOAT:
{
float data = (float)my_strntod(&my_charset_latin1,value,length,NULL,&err);
floatstore(buffer, data);
break;
}
case MYSQL_TYPE_DOUBLE:
{
double data= my_strntod(&my_charset_latin1,value,length,NULL,&err);
doublestore(buffer, data);
break;
}
case MYSQL_TYPE_TIME:
{
int dummy;
MYSQL_TIME *tm= (MYSQL_TIME *)buffer;
str_to_time(value, length, tm, &dummy);
break;
}
case MYSQL_TYPE_DATE:
case MYSQL_TYPE_DATETIME:
{
int dummy;
MYSQL_TIME *tm= (MYSQL_TIME *)buffer;
str_to_datetime(value, length, tm, 0, &dummy);
break;
}
case MYSQL_TYPE_TINY_BLOB:
case MYSQL_TYPE_MEDIUM_BLOB:
case MYSQL_TYPE_LONG_BLOB:
case MYSQL_TYPE_BLOB:
*param->length= length;
length= min(length-param->offset, param->buffer_length);
if ((long) length > 0)
memcpy(buffer, value+param->offset, length);
break;
default:
*param->length= length;
length= min(length-param->offset, param->buffer_length);
if ((long) length < 0)
length= 0;
else
memcpy(buffer, value+param->offset, length);
if (length != param->buffer_length)
buffer[length]= '\0';
}
}
static void send_data_time(MYSQL_BIND *param, MYSQL_TIME ltime,
uint length)
static void fetch_datetime_with_conversion(MYSQL_BIND *param,
MYSQL_TIME *time)
{
switch (param->buffer_type) {
case MYSQL_TYPE_NULL: /* do nothing */
break;
case MYSQL_TYPE_DATE:
case MYSQL_TYPE_TIME:
case MYSQL_TYPE_DATETIME:
case MYSQL_TYPE_TIMESTAMP:
{
MYSQL_TIME *tm= (MYSQL_TIME *)param->buffer;
tm->year= ltime.year;
tm->month= ltime.month;
tm->day= ltime.day;
tm->hour= ltime.hour;
tm->minute= ltime.minute;
tm->second= ltime.second;
tm->second_part= ltime.second_part;
tm->neg= ltime.neg;
/* XXX: should we copy only relevant members here? */
*(MYSQL_TIME *)(param->buffer)= *time;
break;
}
default:
{
/*
Convert time value to string and delegate the rest to
fetch_string_with_conversion:
*/
char buff[25];
uint length;
if (!length)
ltime.time_type= MYSQL_TIMESTAMP_NONE;
switch (ltime.time_type) {
switch (time->time_type) {
case MYSQL_TIMESTAMP_DATE:
length= my_sprintf(buff,(buff, "%04d-%02d-%02d", ltime.year,
ltime.month,ltime.day));
length= my_sprintf(buff,(buff, "%04d-%02d-%02d",
time->year, time->month, time->day));
break;
case MYSQL_TIMESTAMP_DATETIME:
length= my_sprintf(buff,(buff, "%04d-%02d-%02d %02d:%02d:%02d",
ltime.year,ltime.month,ltime.day,
ltime.hour,ltime.minute,ltime.second));
time->year, time->month, time->day,
time->hour, time->minute, time->second));
break;
case MYSQL_TIMESTAMP_TIME:
length= my_sprintf(buff, (buff, "%02d:%02d:%02d",
ltime.hour,ltime.minute,ltime.second));
time->hour, time->minute, time->second));
break;
default:
length= 0;
buff[0]='\0';
break;
}
send_data_str(param, (char *)buff, length);
/* Resort to string conversion */
fetch_string_with_conversion(param, (char *)buff, length);
break;
}
}
}
/* Fetch data to client buffers with conversion. */
/*
Fetch and convert result set column to output buffer.
static void fetch_results(MYSQL_BIND *param, MYSQL_FIELD *field, uchar **row)
SYNOPSIS
fetch_result_with_conversion()
param output buffer descriptor
field column metadata
row points to a column of result set tuple in binary format
DESCRIPTION
This is a fallback implementation of column fetch used
if column and output buffer types do not match.
Increases tuple pointer to point at the next column within the
tuple.
*/
static void fetch_result_with_conversion(MYSQL_BIND *param, MYSQL_FIELD *field,
uchar **row)
{
ulong length;
enum enum_field_types field_type= field->type;
@ -3381,9 +3442,9 @@ static void fetch_results(MYSQL_BIND *param, MYSQL_FIELD *field, uchar **row)
{
char value= (char) **row;
uint field_is_unsigned= (field->flags & UNSIGNED_FLAG);
longlong data= ((field_is_unsigned) ? (longlong) (unsigned char) value:
(longlong) value);
send_data_long(param, field, data);
longlong data= (field_is_unsigned) ? (longlong) (unsigned char) value:
(longlong) value;
fetch_long_with_conversion(param, field, data);
length= 1;
break;
}
@ -3394,7 +3455,7 @@ static void fetch_results(MYSQL_BIND *param, MYSQL_FIELD *field, uchar **row)
uint field_is_unsigned= (field->flags & UNSIGNED_FLAG);
longlong data= ((field_is_unsigned) ? (longlong) (unsigned short) value:
(longlong) value);
send_data_long(param, field, data);
fetch_long_with_conversion(param, field, data);
length= 2;
break;
}
@ -3404,14 +3465,14 @@ static void fetch_results(MYSQL_BIND *param, MYSQL_FIELD *field, uchar **row)
uint field_is_unsigned= (field->flags & UNSIGNED_FLAG);
longlong data= ((field_is_unsigned) ? (longlong) (unsigned long) value:
(longlong) value);
send_data_long(param, field, data);
fetch_long_with_conversion(param, field, data);
length= 4;
break;
}
case MYSQL_TYPE_LONGLONG:
{
longlong value= (longlong)sint8korr(*row);
send_data_long(param, field, value);
fetch_long_with_conversion(param, field, value);
length= 8;
break;
}
@ -3419,7 +3480,7 @@ static void fetch_results(MYSQL_BIND *param, MYSQL_FIELD *field, uchar **row)
{
float value;
float4get(value,*row);
send_data_double(param,value);
fetch_float_with_conversion(param, field, value, FLT_DIG);
length= 4;
break;
}
@ -3427,7 +3488,7 @@ static void fetch_results(MYSQL_BIND *param, MYSQL_FIELD *field, uchar **row)
{
double value;
float8get(value,*row);
send_data_double(param,value);
fetch_float_with_conversion(param, field, value, DBL_DIG);
length= 8;
break;
}
@ -3436,8 +3497,7 @@ static void fetch_results(MYSQL_BIND *param, MYSQL_FIELD *field, uchar **row)
MYSQL_TIME tm;
length= read_binary_date(&tm, row);
tm.time_type= MYSQL_TIMESTAMP_DATE;
send_data_time(param, tm, length);
fetch_datetime_with_conversion(param, &tm);
break;
}
case MYSQL_TYPE_TIME:
@ -3445,8 +3505,7 @@ static void fetch_results(MYSQL_BIND *param, MYSQL_FIELD *field, uchar **row)
MYSQL_TIME tm;
length= read_binary_time(&tm, row);
tm.time_type= MYSQL_TIMESTAMP_TIME;
send_data_time(param, tm, length);
fetch_datetime_with_conversion(param, &tm);
break;
}
case MYSQL_TYPE_DATETIME:
@ -3455,13 +3514,12 @@ static void fetch_results(MYSQL_BIND *param, MYSQL_FIELD *field, uchar **row)
MYSQL_TIME tm;
length= read_binary_datetime(&tm, row);
tm.time_type= MYSQL_TIMESTAMP_DATETIME;
send_data_time(param, tm, length);
fetch_datetime_with_conversion(param, &tm);
break;
}
default:
length= net_field_length(row);
send_data_str(param,(char*) *row,length);
fetch_string_with_conversion(param, (char*) *row, length);
break;
}
*row+= length;
@ -3606,7 +3664,6 @@ static void skip_result_string(MYSQL_BIND *param __attribute__((unused)),
}
/*
Setup the bind buffers for resultset processing
*/
@ -3825,7 +3882,7 @@ static int stmt_fetch_row(MYSQL_STMT *stmt, uchar *row)
if (field->type == bind->buffer_type)
(*bind->fetch_result)(bind, &row);
else
fetch_results(bind, field, &row);
fetch_result_with_conversion(bind, field, &row);
}
if (!((bit<<=1) & 255))
{
@ -3917,7 +3974,7 @@ int STDCALL mysql_stmt_fetch_column(MYSQL_STMT *stmt, MYSQL_BIND *bind,
*bind->length= *param->length;
else
bind->length= &param->internal_length; /* Needed for fetch_result() */
fetch_results(bind, field, &row);
fetch_result_with_conversion(bind, field, &row);
}
else
{