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Overview
| Comment: | Enhance the showdb tool to show overflow page pointers at the end of overflow cells. |
|---|---|
| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
cda5eab18f48d3836dfd3e1f8c76e5f8 |
| User & Date: | drh 2011-01-06 15:51:19.000 |
Context
|
2011-01-07
| ||
| 02:50 | Reorder the fields in private structures in an effort to reduce alignment gaps and thus make the structures smaller, and to put frequently accessed fields first. Also update some obsolete comments. Valgrind shows a very slight performance improvement. (check-in: 378a1d13af user: drh tags: trunk) | |
|
2011-01-06
| ||
| 15:51 | Enhance the showdb tool to show overflow page pointers at the end of overflow cells. (check-in: cda5eab18f user: drh tags: trunk) | |
| 01:26 | Enhance the showdb tool to show a btree page layout. Add limit checks so that overflow content does not overflow the buffer. (check-in: 57ffa07e26 user: drh tags: trunk) | |
Changes
Changes to tool/showdb.c.
| ︙ | ︙ | |||
55 56 57 58 59 60 61 62 63 64 65 66 67 68 |
** Space to hold the content is obtained from malloc() and needs to be
** freed by the caller.
*/
static unsigned char *getContent(int ofst, int nByte){
unsigned char *aData;
aData = malloc(nByte+32);
if( aData==0 ) out_of_memory();
lseek(db, ofst, SEEK_SET);
read(db, aData, nByte);
return aData;
}
/*
** Print a range of bytes as hex and as ascii.
| > | 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 |
** Space to hold the content is obtained from malloc() and needs to be
** freed by the caller.
*/
static unsigned char *getContent(int ofst, int nByte){
unsigned char *aData;
aData = malloc(nByte+32);
if( aData==0 ) out_of_memory();
memset(aData, 0, nByte+32);
lseek(db, ofst, SEEK_SET);
read(db, aData, nByte);
return aData;
}
/*
** Print a range of bytes as hex and as ascii.
|
| ︙ | ︙ | |||
315 316 317 318 319 320 321 322 323 324 325 326 327 328 |
}
if( cType==5 || cType==13 ){
i = decodeVarint(a, &rowid);
a += i;
n += i;
sprintf(&zDesc[nDesc], "r: %lld ", rowid);
nDesc += strlen(&zDesc[nDesc]);
}
if( showCellContent && cType!=5 ){
nDesc += describeContent(a, nLocal, &zDesc[nDesc-1]);
}
*pzDesc = zDesc;
return nLocal+n;
}
| > > > > > > > > | 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 |
}
if( cType==5 || cType==13 ){
i = decodeVarint(a, &rowid);
a += i;
n += i;
sprintf(&zDesc[nDesc], "r: %lld ", rowid);
nDesc += strlen(&zDesc[nDesc]);
}
if( nLocal<nPayload ){
int ovfl;
unsigned char *b = &a[nLocal];
ovfl = ((b[0]*256 + b[1])*256 + b[2])*256 + b[3];
sprintf(&zDesc[nDesc], "ov: %d ", ovfl);
nDesc += strlen(&zDesc[nDesc]);
n += 4;
}
if( showCellContent && cType!=5 ){
nDesc += describeContent(a, nLocal, &zDesc[nDesc-1]);
}
*pzDesc = zDesc;
return nLocal+n;
}
|
| ︙ | ︙ |