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Overview
| Comment: | Make sure the random() function always returns a value that can be passed to abs(). (CVS 3109) |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
5d2e7ea01989fc9ba2c79d192760bc29 |
| User & Date: | drh 2006-02-23 21:51:13 |
Context
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2006-02-24
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| 02:53 | Remove unused parameters on internal APIs. Suppress warnings from CodeWarrior. (CVS 3110) check-in: 4b22e4b8 user: drh tags: trunk | |
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2006-02-23
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| 21:51 | Make sure the random() function always returns a value that can be passed to abs(). (CVS 3109) check-in: 5d2e7ea0 user: drh tags: trunk | |
| 21:43 | Detect integer overflow in the abs() function. The random() function now provides 64 bits of randomness instead of just 32. Fix bugs in testing logic of test4.c. (CVS 3108) check-in: 942c5095 user: drh tags: trunk | |
Changes
Changes to src/func.c.
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** This file contains the C functions that implement various SQL ** functions of SQLite. ** ** There is only one exported symbol in this file - the function ** sqliteRegisterBuildinFunctions() found at the bottom of the file. ** All other code has file scope. ** ** $Id: func.c,v 1.123 2006/02/23 21:43:56 drh Exp $ */ #include "sqliteInt.h" #include <ctype.h> /* #include <math.h> */ #include <stdlib.h> #include <assert.h> #include "vdbeInt.h" ................................................................................ static void randomFunc( sqlite3_context *context, int argc, sqlite3_value **argv ){ sqlite_int64 r; sqlite3Randomness(sizeof(r), &r); sqlite3_result_int64(context, r); } /* ** Implementation of the last_insert_rowid() SQL function. The return ** value is the same as the sqlite3_last_insert_rowid() API function. */ |
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** This file contains the C functions that implement various SQL ** functions of SQLite. ** ** There is only one exported symbol in this file - the function ** sqliteRegisterBuildinFunctions() found at the bottom of the file. ** All other code has file scope. ** ** $Id: func.c,v 1.124 2006/02/23 21:51:13 drh Exp $ */ #include "sqliteInt.h" #include <ctype.h> /* #include <math.h> */ #include <stdlib.h> #include <assert.h> #include "vdbeInt.h" ................................................................................ static void randomFunc( sqlite3_context *context, int argc, sqlite3_value **argv ){ sqlite_int64 r; sqlite3Randomness(sizeof(r), &r); if( (r<<1)==0 ) r = 0; /* Prevent 0x8000.... as the result so that we */ /* can always do abs() of the result */ sqlite3_result_int64(context, r); } /* ** Implementation of the last_insert_rowid() SQL function. The return ** value is the same as the sqlite3_last_insert_rowid() API function. */ |