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Make NUM_TOCHAR_prepare and NUM_TOCHAR_finish macros declare "len". 

Remove the variable from the enclosing scopes so that nothing can be
relying on it.  The net result of this refactoring is that we get rid
of a few unnecessary strlen() calls.

Original patch from Greg Jaskiewicz, substantially expanded by me.
This commit is contained in:
Robert Haas 2013-12-02 10:51:06 -05:00
parent 9d140f7be2
commit a8656a3ab0
1 changed files with 15 additions and 18 deletions
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33
src/backend/utils/adt/formatting.c
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@ -4877,7 +4877,7 @@ NUM_processor(FormatNode *node, NUMDesc *Num, char *inout, char *number,
*/
#define NUM_TOCHAR_prepare \
do { \
len = VARSIZE_ANY_EXHDR(fmt); \
int len = VARSIZE_ANY_EXHDR(fmt); \
if (len <= 0 || len >= (INT_MAX-VARHDRSZ)/NUM_MAX_ITEM_SIZ) \
PG_RETURN_TEXT_P(cstring_to_text("")); \
result = (text *) palloc0((len * NUM_MAX_ITEM_SIZ) + 1 + VARHDRSZ); \
@ -4890,6 +4890,8 @@ do { \
*/
#define NUM_TOCHAR_finish \
do { \
int len; \
\
NUM_processor(format, &Num, VARDATA(result), numstr, plen, sign, true, PG_GET_COLLATION()); \
\
if (shouldFree) \
@ -4961,8 +4963,7 @@ numeric_to_char(PG_FUNCTION_ARGS)
FormatNode *format;
text *result;
bool shouldFree;
int len = 0,
plen = 0,
int plen = 0,
sign = 0;
char *numstr,
*orgnum,
@ -5008,16 +5009,15 @@ numeric_to_char(PG_FUNCTION_ARGS)
numstr = (char *) palloc(strlen(orgnum) + 2);
*numstr = ' ';
strcpy(numstr + 1, orgnum);
len = strlen(numstr);
}
else
{
numstr = orgnum;
len = strlen(orgnum);
}
}
else
{
int len;
Numeric val = value;
if (IS_MULTI(&Num))
@ -5084,8 +5084,7 @@ int4_to_char(PG_FUNCTION_ARGS)
FormatNode *format;
text *result;
bool shouldFree;
int len = 0,
plen = 0,
int plen = 0,
sign = 0;
char *numstr,
*orgnum;
@ -5111,11 +5110,12 @@ int4_to_char(PG_FUNCTION_ARGS)
if (*orgnum == '+')
*orgnum = ' ';
len = strlen(orgnum);
numstr = orgnum;
}
else
{
int len;
if (IS_MULTI(&Num))
{
orgnum = DatumGetCString(DirectFunctionCall1(int4out,
@ -5175,8 +5175,7 @@ int8_to_char(PG_FUNCTION_ARGS)
FormatNode *format;
text *result;
bool shouldFree;
int len = 0,
plen = 0,
int plen = 0,
sign = 0;
char *numstr,
*orgnum;
@ -5211,16 +5210,16 @@ int8_to_char(PG_FUNCTION_ARGS)
numstr = (char *) palloc(strlen(orgnum) + 2);
*numstr = ' ';
strcpy(numstr + 1, orgnum);
len = strlen(numstr);
}
else
{
numstr = orgnum;
len = strlen(orgnum);
}
}
else
{
int len;
if (IS_MULTI(&Num))
{
double multi = pow((double) 10, (double) Num.multi);
@ -5282,8 +5281,7 @@ float4_to_char(PG_FUNCTION_ARGS)
FormatNode *format;
text *result;
bool shouldFree;
int len = 0,
plen = 0,
int plen = 0,
sign = 0;
char *numstr,
*orgnum,
@ -5317,13 +5315,13 @@ float4_to_char(PG_FUNCTION_ARGS)
if (*orgnum == '+')
*orgnum = ' ';
len = strlen(orgnum);
numstr = orgnum;
}
}
else
{
float4 val = value;
int len;
if (IS_MULTI(&Num))
{
@ -5386,8 +5384,7 @@ float8_to_char(PG_FUNCTION_ARGS)
FormatNode *format;
text *result;
bool shouldFree;
int len = 0,
plen = 0,
int plen = 0,
sign = 0;
char *numstr,
*orgnum,
@ -5421,13 +5418,13 @@ float8_to_char(PG_FUNCTION_ARGS)
if (*orgnum == '+')
*orgnum = ' ';
len = strlen(orgnum);
numstr = orgnum;
}
}
else
{
float8 val = value;
int len;
if (IS_MULTI(&Num))
{