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Commit4c8156d

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Add PGTYPESchar_free() to avoid cross-module problems on Windows.
On Windows, it is sometimes important for corresponding malloc() andfree() calls to be made from the same DLL, since some build options canresult in multiple allocators being active at the same time. For thatreason we already provided PQfreemem(). This commit adds a similarfunction for freeing string results allocated by the pgtypes library.Author: Takayuki TsunakawaReviewed-by: Kyotaro HoriguchiDiscussion:https://postgr.es/m/0A3221C70F24FB45833433255569204D1F8AD5D6%40G01JPEXMBYT05
1 parent70b4f82 commit4c8156d

20 files changed

+189
-136
lines changed

‎doc/src/sgml/ecpg.sgml

Lines changed: 17 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1951,11 +1951,23 @@ EXEC SQL SELECT started, duration INTO :ts1, :iv1 FROM datetbl WHERE d=:date1;
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PGTYPEStimestamp_add_interval(&ts1, &iv1, &tsout);
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out = PGTYPEStimestamp_to_asc(&tsout);
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printf("Started + duration: %s\n", out);
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free(out);
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PGTYPESchar_free(out);
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]]>
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</programlisting>
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</para>
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<sect2 id="ecpg-pgtypes-cstrings">
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<title>Character Strings</title>
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<para>
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Some functions such as <function>PGTYPESnumeric_to_asc</function> return
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a pointer to a freshly allocated character string. These results should be
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freed with <function>PGTYPESchar_free</function> instead of
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<function>free</function>. (This is important only on Windows, where
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memory allocation and release sometimes need to be done by the same
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library.)
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</para>
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</sect2>
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<sect2 id="ecpg-pgtypes-numeric">
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<title>The numeric Type</title>
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<para>
@@ -2029,6 +2041,7 @@ char *PGTYPESnumeric_to_asc(numeric *num, int dscale);
20292041
</synopsis>
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The numeric value will be printed with <literal>dscale</literal> decimal
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digits, with rounding applied if necessary.
2044+
The result must be freed with <function>PGTYPESchar_free()</function>.
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</para>
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</listitem>
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</varlistentry>
@@ -2419,6 +2432,7 @@ char *PGTYPESdate_to_asc(date dDate);
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The function receives the date <literal>dDate</literal> as its only parameter.
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It will output the date in the form <literal>1999-01-18</literal>, i.e., in the
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<literal>YYYY-MM-DD</literal> format.
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The result must be freed with <function>PGTYPESchar_free()</function>.
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</para>
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</listitem>
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</varlistentry>
@@ -2841,6 +2855,7 @@ char *PGTYPEStimestamp_to_asc(timestamp tstamp);
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The function receives the timestamp <literal>tstamp</literal> as
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its only argument and returns an allocated string that contains the
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textual representation of the timestamp.
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The result must be freed with <function>PGTYPESchar_free()</function>.
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</para>
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</listitem>
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</varlistentry>
@@ -3349,6 +3364,7 @@ char *PGTYPESinterval_to_asc(interval *span);
33493364
The function converts the interval variable that <literal>span</literal>
33503365
points to into a C char*. The output looks like this example:
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<literal>@ 1 day 12 hours 59 mins 10 secs</literal>.
3367+
The result must be freed with <function>PGTYPESchar_free()</function>.
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</para>
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</listitem>
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</varlistentry>

‎src/interfaces/ecpg/include/Makefile

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -14,7 +14,7 @@ install: all installdirs install-headers
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.PHONY: install-headers
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ecpg_headers = ecpgerrno.h ecpglib.h ecpgtype.h sqlca.h sql3types.h ecpg_informix.h\
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pgtypes_error.h pgtypes_numeric.h pgtypes_timestamp.h pgtypes_date.h pgtypes_interval.h\
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pgtypes_error.h pgtypes_numeric.h pgtypes_timestamp.h pgtypes_date.h pgtypes_interval.hpgtypes.h\
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sqlda.h sqlda-compat.h sqlda-native.h
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informix_headers = datetime.h decimal.h sqltypes.h
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‎src/interfaces/ecpg/include/pgtypes.h

Lines changed: 17 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,17 @@
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/* src/interfaces/ecpg/include/pgtypes.h */
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#ifndefPGTYPES_H
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#definePGTYPES_H
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#ifdef__cplusplus
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extern"C"
8+
{
9+
#endif
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11+
externvoidPGTYPESchar_free(char*ptr);
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#ifdef__cplusplus
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}
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#endif
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17+
#endif/* PGTYPES_H */

‎src/interfaces/ecpg/include/pgtypes_date.h

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -3,6 +3,7 @@
33
#ifndefPGTYPES_DATETIME
44
#definePGTYPES_DATETIME
55

6+
#include<pgtypes.h>
67
#include<pgtypes_timestamp.h>
78

89
typedeflongdate;

‎src/interfaces/ecpg/include/pgtypes_interval.h

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -4,6 +4,7 @@
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#definePGTYPES_INTERVAL
55

66
#include<ecpg_config.h>
7+
#include<pgtypes.h>
78

89
#ifndefC_H
910

‎src/interfaces/ecpg/include/pgtypes_numeric.h

Lines changed: 2 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1,6 +1,8 @@
11
#ifndefPGTYPES_NUMERIC
22
#definePGTYPES_NUMERIC
33

4+
#include<pgtypes.h>
5+
46
#defineNUMERIC_POS0x0000
57
#defineNUMERIC_NEG0x4000
68
#defineNUMERIC_NAN0xC000

‎src/interfaces/ecpg/include/pgtypes_timestamp.h

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -3,6 +3,7 @@
33
#ifndefPGTYPES_TIMESTAMP
44
#definePGTYPES_TIMESTAMP
55

6+
#include<pgtypes.h>
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/* pgtypes_interval.h includes ecpg_config.h */
78
#include<pgtypes_interval.h>
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‎src/interfaces/ecpg/pgtypeslib/common.c

Lines changed: 10 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -3,6 +3,7 @@
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#include"postgres_fe.h"
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55
#include"extern.h"
6+
#include"pgtypes.h"
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78
/* Return value is zero-filled. */
89
char*
@@ -136,3 +137,12 @@ pgtypes_fmt_replace(union un_fmt_comb replace_val, int replace_type, char **outp
136137
}
137138
return0;
138139
}
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/* Functions declared in pgtypes.h. */
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143+
/* Just frees memory (mostly needed for Windows) */
144+
void
145+
PGTYPESchar_free(char*ptr)
146+
{
147+
free(ptr);
148+
}

‎src/interfaces/ecpg/pgtypeslib/exports.txt

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -45,3 +45,4 @@ PGTYPEStimestamp_from_asc 42
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PGTYPEStimestamp_sub 43
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PGTYPEStimestamp_sub_interval 44
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PGTYPEStimestamp_to_asc 45
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PGTYPESchar_free 46

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