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Overview
| Comment: | Disable the delta checksum verification in RBU by default. Reenable it using -DRBU_ENABLE_DELTA_CKSUM, if desired. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
d22c99b6ba997179ef3ccd341d9c36d5 |
| User & Date: | drh 2017-10-05 11:29:37 |
Context
|
2017-10-05
| ||
| 19:12 | Fix the command-line shell so that the ".schema --indent" command does a better job of dealing with \r\n in the middle of a CREATE statement in the schema. check-in: 4258fb57 user: drh tags: trunk | |
| 11:29 | Disable the delta checksum verification in RBU by default. Reenable it using -DRBU_ENABLE_DELTA_CKSUM, if desired. check-in: d22c99b6 user: drh tags: trunk | |
|
2017-10-04
| ||
| 18:26 | Updates to requirements marks. check-in: 40964a4e user: drh tags: trunk | |
Changes
Changes to ext/rbu/sqlite3rbu.c.
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#if defined(_WIN32_WCE)
#include "windows.h"
#endif
/* Maximum number of prepared UPDATE statements held by this module */
#define SQLITE_RBU_UPDATE_CACHESIZE 16
/*
** Swap two objects of type TYPE.
*/
#if !defined(SQLITE_AMALGAMATION)
# define SWAP(TYPE,A,B) {TYPE t=A; A=B; B=t;}
#endif
................................................................................
}
z--;
*pLen -= z - zStart;
*pz = (char*)z;
return v;
}
/*
** Compute a 32-bit checksum on the N-byte buffer. Return the result.
*/
static unsigned int rbuDeltaChecksum(const char *zIn, size_t N){
const unsigned char *z = (const unsigned char *)zIn;
unsigned sum0 = 0;
unsigned sum1 = 0;
................................................................................
case 3: sum3 += (z[2] << 8);
case 2: sum3 += (z[1] << 16);
case 1: sum3 += (z[0] << 24);
default: ;
}
return sum3;
}
/*
** Apply a delta.
**
** The output buffer should be big enough to hold the whole output
** file and a NUL terminator at the end. The delta_output_size()
** routine will determine this size for you.
................................................................................
int lenSrc, /* Length of the source file */
const char *zDelta, /* Delta to apply to the pattern */
int lenDelta, /* Length of the delta */
char *zOut /* Write the output into this preallocated buffer */
){
unsigned int limit;
unsigned int total = 0;
#ifndef FOSSIL_OMIT_DELTA_CKSUM_TEST
char *zOrigOut = zOut;
#endif
limit = rbuDeltaGetInt(&zDelta, &lenDelta);
if( *zDelta!='\n' ){
/* ERROR: size integer not terminated by "\n" */
return -1;
................................................................................
zDelta += cnt;
lenDelta -= cnt;
break;
}
case ';': {
zDelta++; lenDelta--;
zOut[0] = 0;
#ifndef FOSSIL_OMIT_DELTA_CKSUM_TEST
if( cnt!=rbuDeltaChecksum(zOrigOut, total) ){
/* ERROR: bad checksum */
return -1;
}
#endif
if( total!=limit ){
/* ERROR: generated size does not match predicted size */
|
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#if defined(_WIN32_WCE) #include "windows.h" #endif /* Maximum number of prepared UPDATE statements held by this module */ #define SQLITE_RBU_UPDATE_CACHESIZE 16 /* Delta checksums disabled by default. Compile with -DRBU_ENABLE_DELTA_CKSUM ** to enable checksum verification. */ #ifndef RBU_ENABLE_DELTA_CKSUM # define RBU_ENABLE_DELTA_CKSUM 0 #endif /* ** Swap two objects of type TYPE. */ #if !defined(SQLITE_AMALGAMATION) # define SWAP(TYPE,A,B) {TYPE t=A; A=B; B=t;} #endif ................................................................................ } z--; *pLen -= z - zStart; *pz = (char*)z; return v; } #if RBU_ENABLE_DELTA_CKSUM /* ** Compute a 32-bit checksum on the N-byte buffer. Return the result. */ static unsigned int rbuDeltaChecksum(const char *zIn, size_t N){ const unsigned char *z = (const unsigned char *)zIn; unsigned sum0 = 0; unsigned sum1 = 0; ................................................................................ case 3: sum3 += (z[2] << 8); case 2: sum3 += (z[1] << 16); case 1: sum3 += (z[0] << 24); default: ; } return sum3; } #endif /* ** Apply a delta. ** ** The output buffer should be big enough to hold the whole output ** file and a NUL terminator at the end. The delta_output_size() ** routine will determine this size for you. ................................................................................ int lenSrc, /* Length of the source file */ const char *zDelta, /* Delta to apply to the pattern */ int lenDelta, /* Length of the delta */ char *zOut /* Write the output into this preallocated buffer */ ){ unsigned int limit; unsigned int total = 0; #if RBU_ENABLE_DELTA_CKSUM char *zOrigOut = zOut; #endif limit = rbuDeltaGetInt(&zDelta, &lenDelta); if( *zDelta!='\n' ){ /* ERROR: size integer not terminated by "\n" */ return -1; ................................................................................ zDelta += cnt; lenDelta -= cnt; break; } case ';': { zDelta++; lenDelta--; zOut[0] = 0; #if RBU_ENABLE_DELTA_CKSUM if( cnt!=rbuDeltaChecksum(zOrigOut, total) ){ /* ERROR: bad checksum */ return -1; } #endif if( total!=limit ){ /* ERROR: generated size does not match predicted size */ |