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| Comment: | More compact implementation of the typeof() SQL function. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
efb4aab0caa4145732a5438cc2a193bc |
| User & Date: | drh 2017-07-06 13:51:50 |
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2017-07-06
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| 16:33 | Change the (machine-generated) keywordhash.h file to increase the scope of the tables used for keyword matching, so that the tables are accessible to functions other then keywordCode(). (check-in: c5ed5ebd user: drh tags: trunk) | |
| 13:51 | More compact implementation of the typeof() SQL function. (check-in: efb4aab0 user: drh tags: trunk) | |
| 13:23 | Avoid unnecessary upper-to-lower case conversion for function names when registering the built-in functions. (check-in: 06269257 user: drh tags: trunk) | |
Changes to src/func.c.
72 72 ** Return the type of the argument. 73 73 */ 74 74 static void typeofFunc( 75 75 sqlite3_context *context, 76 76 int NotUsed, 77 77 sqlite3_value **argv 78 78 ){ 79 - const char *z = 0; 79 + static const char *azType[] = { "integer", "real", "text", "blob", "null" }; 80 + int i = sqlite3_value_type(argv[0]) - 1; 80 81 UNUSED_PARAMETER(NotUsed); 81 - switch( sqlite3_value_type(argv[0]) ){ 82 - case SQLITE_INTEGER: z = "integer"; break; 83 - case SQLITE_TEXT: z = "text"; break; 84 - case SQLITE_FLOAT: z = "real"; break; 85 - case SQLITE_BLOB: z = "blob"; break; 86 - default: z = "null"; break; 87 - } 88 - sqlite3_result_text(context, z, -1, SQLITE_STATIC); 82 + assert( i>=0 && i<ArraySize(azType) ); 83 + assert( SQLITE_INTEGER==1 ); 84 + assert( SQLITE_FLOAT==2 ); 85 + assert( SQLITE_TEXT==3 ); 86 + assert( SQLITE_BLOB==4 ); 87 + assert( SQLITE_NULL==5 ); 88 + sqlite3_result_text(context, azType[i], -1, SQLITE_STATIC); 89 89 } 90 90 91 91 92 92 /* 93 93 ** Implementation of the length() function 94 94 */ 95 95 static void lengthFunc(