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Commit7eff804

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committed
Clean up encode/decode functions a little bit.
1 parent12054ba commit7eff804

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1 file changed

+22
-26
lines changed

1 file changed

+22
-26
lines changed

‎src/backend/utils/adt/encode.c‎

Lines changed: 22 additions & 26 deletions
Original file line numberDiff line numberDiff line change
@@ -7,13 +7,14 @@
77
*
88
*
99
* IDENTIFICATION
10-
* $Header: /cvsroot/pgsql/src/backend/utils/adt/encode.c,v 1.2 2001/09/14 17:46:40 momjian Exp $
10+
* $Header: /cvsroot/pgsql/src/backend/utils/adt/encode.c,v 1.3 2001/09/30 22:03:41 tgl Exp $
1111
*
1212
*-------------------------------------------------------------------------
1313
*/
1414
#include"postgres.h"
1515

1616
#include<ctype.h>
17+
1718
#include"utils/builtins.h"
1819

1920

@@ -38,24 +39,25 @@ binary_encode(PG_FUNCTION_ARGS)
3839
Datumname=PG_GETARG_DATUM(1);
3940
text*result;
4041
char*namebuf;
41-
intnamelen,datalen,resultlen,res;
42+
intdatalen,resultlen,res;
4243
structpg_encoding*enc;
4344

4445
datalen=VARSIZE(data)-VARHDRSZ;
45-
namelen=VARSIZE(name)-VARHDRSZ;
4646

47-
namebuf=(char*)DirectFunctionCall1(textout,name);
47+
namebuf=DatumGetCString(DirectFunctionCall1(textout,name));
4848

4949
enc=pg_find_encoding(namebuf);
5050
if (enc==NULL)
51-
elog(ERROR,"No such encoding");
51+
elog(ERROR,"No such encoding as '%s'",namebuf);
5252

5353
resultlen=enc->encode_len(VARDATA(data),datalen);
5454
result=palloc(VARHDRSZ+resultlen);
5555

5656
res=enc->encode(VARDATA(data),datalen,VARDATA(result));
57+
58+
/* Make this FATAL 'cause we've trodden on memory ... */
5759
if (res>resultlen)
58-
elog(ERROR,"Overflow - encode estimate too small");
60+
elog(FATAL,"Overflow - encode estimate too small");
5961

6062
VARATT_SIZEP(result)=VARHDRSZ+res;
6163

@@ -69,24 +71,25 @@ binary_decode(PG_FUNCTION_ARGS)
6971
Datumname=PG_GETARG_DATUM(1);
7072
bytea*result;
7173
char*namebuf;
72-
intnamelen,datalen,resultlen,res;
74+
intdatalen,resultlen,res;
7375
structpg_encoding*enc;
7476

7577
datalen=VARSIZE(data)-VARHDRSZ;
76-
namelen=VARSIZE(name)-VARHDRSZ;
7778

78-
namebuf=(char*)DirectFunctionCall1(textout,name);
79+
namebuf=DatumGetCString(DirectFunctionCall1(textout,name));
7980

8081
enc=pg_find_encoding(namebuf);
8182
if (enc==NULL)
82-
elog(ERROR,"No such encoding");
83+
elog(ERROR,"No such encoding as '%s'",namebuf);
8384

8485
resultlen=enc->decode_len(VARDATA(data),datalen);
8586
result=palloc(VARHDRSZ+resultlen);
8687

8788
res=enc->decode(VARDATA(data),datalen,VARDATA(result));
89+
90+
/* Make this FATAL 'cause we've trodden on memory ... */
8891
if (res>resultlen)
89-
elog(ERROR,"Overflow - decode estimate too small");
92+
elog(FATAL,"Overflow - decode estimate too small");
9093

9194
VARATT_SIZEP(result)=VARHDRSZ+res;
9295

@@ -339,14 +342,12 @@ esc_encode(const uint8 *src, unsigned srclen, uint8 *dst)
339342
{
340343
constuint8*end=src+srclen;
341344
uint8*rp=dst;
342-
intval;
343345
intlen=0;
344346

345347
while (src<end)
346348
{
347349
if (*src=='\0')
348350
{
349-
val=*src;
350351
rp[0]='\\';
351352
rp[1]='0';
352353
rp[2]='0';
@@ -356,7 +357,6 @@ esc_encode(const uint8 *src, unsigned srclen, uint8 *dst)
356357
}
357358
elseif (*src=='\\')
358359
{
359-
val=*src;
360360
rp[0]='\\';
361361
rp[1]='\\';
362362
rp+=2;
@@ -370,7 +370,6 @@ esc_encode(const uint8 *src, unsigned srclen, uint8 *dst)
370370

371371
src++;
372372
}
373-
*rp='\0';
374373

375374
returnlen;
376375
}
@@ -380,7 +379,6 @@ esc_decode(const uint8 *src, unsigned srclen, uint8 *dst)
380379
{
381380
constuint8*end=src+srclen;
382381
uint8*rp=dst;
383-
intval;
384382
intlen=0;
385383

386384
while (src<end)
@@ -389,19 +387,21 @@ esc_decode(const uint8 *src, unsigned srclen, uint8 *dst)
389387
{
390388
*rp++=*src++;
391389
}
392-
elseif((src[0]=='\\')&&
390+
elseif(src+3<end&&
393391
(src[1] >='0'&&src[1] <='3')&&
394392
(src[2] >='0'&&src[2] <='7')&&
395393
(src[3] >='0'&&src[3] <='7') )
396394
{
395+
intval;
396+
397397
val=VAL(src[1]);
398398
val <<=3;
399399
val+=VAL(src[2]);
400400
val <<=3;
401401
*rp++=val+VAL(src[3]);
402402
src+=4;
403403
}
404-
elseif ((src[0]=='\\')&&
404+
elseif (src+1<end&&
405405
(src[1]=='\\') )
406406
{
407407
*rp++='\\';
@@ -418,6 +418,7 @@ esc_decode(const uint8 *src, unsigned srclen, uint8 *dst)
418418

419419
len++;
420420
}
421+
421422
returnlen;
422423
}
423424

@@ -439,11 +440,6 @@ esc_enc_len(const uint8 *src, unsigned srclen)
439440
src++;
440441
}
441442

442-
/*
443-
* Allow for null terminator
444-
*/
445-
len++;
446-
447443
returnlen;
448444
}
449445

@@ -459,7 +455,7 @@ esc_dec_len(const uint8 *src, unsigned srclen)
459455
{
460456
src++;
461457
}
462-
elseif((src[0]=='\\')&&
458+
elseif(src+3<end&&
463459
(src[1] >='0'&&src[1] <='3')&&
464460
(src[2] >='0'&&src[2] <='7')&&
465461
(src[3] >='0'&&src[3] <='7') )
@@ -469,7 +465,7 @@ esc_dec_len(const uint8 *src, unsigned srclen)
469465
*/
470466
src+=4;
471467
}
472-
elseif ((src[0]=='\\')&&
468+
elseif (src+1<end&&
473469
(src[1]=='\\') )
474470
{
475471
/*
@@ -510,7 +506,7 @@ pg_find_encoding(const char *name)
510506
inti;
511507

512508
for (i=0;enclist[i].name;i++)
513-
if (!strcasecmp(enclist[i].name,name))
509+
if (strcasecmp(enclist[i].name,name)==0)
514510
return&enclist[i].enc;
515511

516512
returnNULL;

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