/* ** Compute the soundex encoding of a word. ** ** IMP: R-59782-00072 The soundex(X) function returns a string that is the ** soundex encoding of the string X. */ static void soundexFunc( sqlite3_context *context, int argc, sqlite3_value **argv ){ char zResult[8]; const u8 *zIn; int i, j; static const unsigned char iCode[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 0, 1, 2, 0, 0, 2, 2, 4, 5, 5, 0, 1, 2, 6, 2, 3, 0, 1, 0, 2, 0, 2, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 0, 1, 2, 0, 0, 2, 2, 4, 5, 5, 0, 1, 2, 6, 2, 3, 0, 1, 0, 2, 0, 2, 0, 0, 0, 0, 0, }; assert( argc==1 ); zIn = (u8*)sqlite3_value_text(argv[0]); if( zIn==0 ) zIn = (u8*)""; for(i=0; zIn[i] && !sqlite3Isalpha(zIn[i]); i++){} if( zIn[i] ){ u8 prevcode = iCode[zIn[i]&0x7f]; zResult[0] = sqlite3Toupper(zIn[i]); for(j=1; j<4 && zIn[i]; i++){ int code = iCode[zIn[i]&0x7f]; if( code>0 ){ if( code!=prevcode ){ prevcode = code; zResult[j++] = code + '0'; } }else{ prevcode = 0; } } while( j<4 ){ zResult[j++] = '0'; } zResult[j] = 0; sqlite3_result_text(context, zResult, 4, SQLITE_TRANSIENT); }else{ /* IMP: R-64894-50321 The string "?000" is returned if the argument ** is NULL or contains no ASCII alphabetic characters. */ sqlite3_result_text(context, "?000", 4, SQLITE_STATIC); } }
/* ** Attempt to load an SQLite extension library contained in the file ** zFile. The entry point is zProc. zProc may be 0 in which case a ** default entry point name (sqlite3_extension_init) is used. Use ** of the default name is recommended. ** ** Return SQLITE_OK on success and SQLITE_ERROR if something goes wrong. ** ** If an error occurs and pzErrMsg is not 0, then fill *pzErrMsg with ** error message text. The calling function should free this memory ** by calling sqlite3DbFree(db, ). */ static int sqlite3LoadExtension( sqlite3 *db, /* Load the extension into this database connection */ const char *zFile, /* Name of the shared library containing extension */ const char *zProc, /* Entry point. Use "sqlite3_extension_init" if 0 */ char **pzErrMsg /* Put error message here if not 0 */ ){ sqlite3_vfs *pVfs = db->pVfs; void *handle; int (*xInit)(sqlite3*,char**,const sqlite3_api_routines*); char *zErrmsg = 0; const char *zEntry; char *zAltEntry = 0; void **aHandle; int nMsg = 300 + sqlite3Strlen30(zFile); int ii; /* Shared library endings to try if zFile cannot be loaded as written */ static const char *azEndings[] = { #if SQLITE_OS_WIN "dll" #elif defined(__APPLE__) "dylib" #else "so" #endif }; if( pzErrMsg ) *pzErrMsg = 0; /* Ticket #1863. To avoid a creating security problems for older ** applications that relink against newer versions of SQLite, the ** ability to run load_extension is turned off by default. One ** must call sqlite3_enable_load_extension() to turn on extension ** loading. Otherwise you get the following error. */ if( (db->flags & SQLITE_LoadExtension)==0 ){ if( pzErrMsg ){ *pzErrMsg = sqlite3_mprintf("not authorized"); } return SQLITE_ERROR; } zEntry = zProc ? zProc : "sqlite3_extension_init"; handle = sqlite3OsDlOpen(pVfs, zFile); #if SQLITE_OS_UNIX || SQLITE_OS_WIN for(ii=0; ii<ArraySize(azEndings) && handle==0; ii++){ char *zAltFile = sqlite3_mprintf("%s.%s", zFile, azEndings[ii]); if( zAltFile==0 ) return SQLITE_NOMEM; handle = sqlite3OsDlOpen(pVfs, zAltFile); sqlite3_free(zAltFile); } #endif if( handle==0 ){ if( pzErrMsg ){ *pzErrMsg = zErrmsg = sqlite3_malloc(nMsg); if( zErrmsg ){ sqlite3_snprintf(nMsg, zErrmsg, "unable to open shared library [%s]", zFile); sqlite3OsDlError(pVfs, nMsg-1, zErrmsg); } } return SQLITE_ERROR; } xInit = (int(*)(sqlite3*,char**,const sqlite3_api_routines*)) sqlite3OsDlSym(pVfs, handle, zEntry); /* If no entry point was specified and the default legacy ** entry point name "sqlite3_extension_init" was not found, then ** construct an entry point name "sqlite3_X_init" where the X is ** replaced by the lowercase value of every ASCII alphabetic ** character in the filename after the last "/" upto the first ".", ** and eliding the first three characters if they are "lib". ** Examples: ** ** /usr/local/lib/libExample5.4.3.so ==> sqlite3_example_init ** C:/lib/mathfuncs.dll ==> sqlite3_mathfuncs_init */ if( xInit==0 && zProc==0 ){ int iFile, iEntry, c; int ncFile = sqlite3Strlen30(zFile); zAltEntry = sqlite3_malloc(ncFile+30); if( zAltEntry==0 ){ sqlite3OsDlClose(pVfs, handle); return SQLITE_NOMEM; } memcpy(zAltEntry, "sqlite3_", 8); for(iFile=ncFile-1; iFile>=0 && zFile[iFile]!='/'; iFile--){} iFile++; if( sqlite3_strnicmp(zFile+iFile, "lib", 3)==0 ) iFile += 3; for(iEntry=8; (c = zFile[iFile])!=0 && c!='.'; iFile++){ if( sqlite3Isalpha(c) ){ zAltEntry[iEntry++] = (char)sqlite3UpperToLower[(unsigned)c]; } } memcpy(zAltEntry+iEntry, "_init", 6); zEntry = zAltEntry; xInit = (int(*)(sqlite3*,char**,const sqlite3_api_routines*)) sqlite3OsDlSym(pVfs, handle, zEntry); } if( xInit==0 ){ if( pzErrMsg ){ nMsg += sqlite3Strlen30(zEntry); *pzErrMsg = zErrmsg = sqlite3_malloc(nMsg); if( zErrmsg ){ sqlite3_snprintf(nMsg, zErrmsg, "no entry point [%s] in shared library [%s]", zEntry, zFile); sqlite3OsDlError(pVfs, nMsg-1, zErrmsg); } } sqlite3OsDlClose(pVfs, handle); sqlite3_free(zAltEntry); return SQLITE_ERROR; } sqlite3_free(zAltEntry); if( xInit(db, &zErrmsg, &sqlite3Apis) ){ if( pzErrMsg ){ *pzErrMsg = sqlite3_mprintf("error during initialization: %s", zErrmsg); } sqlite3_free(zErrmsg); sqlite3OsDlClose(pVfs, handle); return SQLITE_ERROR; } /* Append the new shared library handle to the db->aExtension array. */ aHandle = sqlite3DbMallocZero(db, sizeof(handle)*(db->nExtension+1)); if( aHandle==0 ){ return SQLITE_NOMEM; } if( db->nExtension>0 ){ memcpy(aHandle, db->aExtension, sizeof(handle)*db->nExtension); } sqlite3DbFree(db, db->aExtension); db->aExtension = aHandle; db->aExtension[db->nExtension++] = handle; return SQLITE_OK; }