diff options
Diffstat (limited to 'ext/pdo_sqlite/sqlite/src/func.c')
| -rw-r--r-- | ext/pdo_sqlite/sqlite/src/func.c | 63 |
1 files changed, 58 insertions, 5 deletions
diff --git a/ext/pdo_sqlite/sqlite/src/func.c b/ext/pdo_sqlite/sqlite/src/func.c index c3444baa0e..455bd2beb0 100644 --- a/ext/pdo_sqlite/sqlite/src/func.c +++ b/ext/pdo_sqlite/sqlite/src/func.c @@ -272,6 +272,25 @@ static void randomFunc( } /* +** Implementation of randomblob(N). Return a random blob +** that is N bytes long. +*/ +static void randomBlob( + sqlite3_context *context, + int argc, + sqlite3_value **argv +){ + int n; + unsigned char *p; + assert( argc==1 ); + n = sqlite3_value_int(argv[0]); + if( n<1 ) n = 1; + p = sqlite3_malloc(n); + sqlite3Randomness(n, p); + sqlite3_result_blob(context, (char*)p, n, sqlite3_free); +} + +/* ** Implementation of the last_insert_rowid() SQL function. The return ** value is the same as the sqlite3_last_insert_rowid() API function. */ @@ -547,6 +566,12 @@ static void versionFunc( sqlite3_result_text(context, sqlite3_version, -1, SQLITE_STATIC); } +/* Array for converting from half-bytes (nybbles) into ASCII hex +** digits. */ +static const char hexdigits[] = { + '0', '1', '2', '3', '4', '5', '6', '7', + '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' +}; /* ** EXPERIMENTAL - This is not an official function. The interface may @@ -572,10 +597,6 @@ static void quoteFunc(sqlite3_context *context, int argc, sqlite3_value **argv){ break; } case SQLITE_BLOB: { - static const char hexdigits[] = { - '0', '1', '2', '3', '4', '5', '6', '7', - '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' - }; char *zText = 0; int nBlob = sqlite3_value_bytes(argv[0]); char const *zBlob = sqlite3_value_blob(argv[0]); @@ -621,11 +642,41 @@ static void quoteFunc(sqlite3_context *context, int argc, sqlite3_value **argv){ } } +/* +** The hex() function. Interpret the argument as a blob. Return +** a hexadecimal rendering as text. +*/ +static void hexFunc( + sqlite3_context *context, + int argc, + sqlite3_value **argv +){ + int i, n; + const unsigned char *pBlob; + char *zHex, *z; + assert( argc==1 ); + pBlob = sqlite3_value_blob(argv[0]); + n = sqlite3_value_bytes(argv[0]); + z = zHex = sqlite3_malloc(n*2 + 1); + if( zHex==0 ) return; + for(i=0; i<n; i++, pBlob++){ + unsigned char c = *pBlob; + *(z++) = hexdigits[(c>>4)&0xf]; + *(z++) = hexdigits[c&0xf]; + } + *z = 0; + sqlite3_result_text(context, zHex, n*2, sqlite3_free); +} + #ifdef SQLITE_SOUNDEX /* ** Compute the soundex encoding of a word. */ -static void soundexFunc(sqlite3_context *context, int argc, sqlite3_value **argv){ +static void soundexFunc( + sqlite3_context *context, + int argc, + sqlite3_value **argv +){ char zResult[8]; const u8 *zIn; int i, j; @@ -1021,8 +1072,10 @@ void sqlite3RegisterBuiltinFunctions(sqlite3 *db){ { "coalesce", -1, 0, SQLITE_UTF8, 0, ifnullFunc }, { "coalesce", 0, 0, SQLITE_UTF8, 0, 0 }, { "coalesce", 1, 0, SQLITE_UTF8, 0, 0 }, + { "hex", 1, 0, SQLITE_UTF8, 0, hexFunc }, { "ifnull", 2, 0, SQLITE_UTF8, 1, ifnullFunc }, { "random", -1, 0, SQLITE_UTF8, 0, randomFunc }, + { "randomblob", 1, 0, SQLITE_UTF8, 0, randomBlob }, { "nullif", 2, 0, SQLITE_UTF8, 1, nullifFunc }, { "sqlite_version", 0, 0, SQLITE_UTF8, 0, versionFunc}, { "quote", 1, 0, SQLITE_UTF8, 0, quoteFunc }, |