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Add the SQLITE_TESTCTRL_BYTEORDER test control to interrogate SQLite's notion

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of the processor byte order and whether the byte order is known at compile-time
or determined at run-time.

FossilOrigin-Name: 9c6961967ae00e563ebe2859eaf2639a79f2cb01
This commit is contained in:
drh
2014-04-18 00:06:02 +00:00
parent 65b9ac5224
commit 2cf4acbd9f
6 changed files with 38 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/main.c
+16
View File
@@ -3205,6 +3205,22 @@ int sqlite3_test_control(int op, ...){
break;
}
/*
** sqlite3_test_control(SQLITE_TESTCTRL_BYTEORDER);
**
** The integer returned reveals the byte-order of the computer on which
** SQLite is running:
**
** 1 big-endian, determined at run-time
** 10 little-endian, determined at run-time
** 432101 big-endian, determined at compile-time
** 123410 little-endian, determined at compile-time
*/
case SQLITE_TESTCTRL_BYTEORDER: {
rc = SQLITE_BYTEORDER*100 + SQLITE_LITTLEENDIAN*10 + SQLITE_BIGENDIAN;
break;
}
/* sqlite3_test_control(SQLITE_TESTCTRL_RESERVE, sqlite3 *db, int N)
**
** Set the nReserve size to N for the main database on the database
src/shell.c
+4 -2
View File
@@ -3027,6 +3027,7 @@ static int do_meta_command(char *zLine, struct callback_data *p){
{ "optimizations", SQLITE_TESTCTRL_OPTIMIZATIONS },
{ "iskeyword", SQLITE_TESTCTRL_ISKEYWORD },
{ "scratchmalloc", SQLITE_TESTCTRL_SCRATCHMALLOC },
{ "byteorder", SQLITE_TESTCTRL_BYTEORDER },
};
int testctrl = -1;
int rc = 0;
@@ -3067,9 +3068,10 @@ static int do_meta_command(char *zLine, struct callback_data *p){
break;
/* sqlite3_test_control(int) */
case SQLITE_TESTCTRL_PRNG_SAVE:
case SQLITE_TESTCTRL_PRNG_RESTORE:
case SQLITE_TESTCTRL_PRNG_SAVE:
case SQLITE_TESTCTRL_PRNG_RESTORE:
case SQLITE_TESTCTRL_PRNG_RESET:
case SQLITE_TESTCTRL_BYTEORDER:
if( nArg==2 ){
rc = sqlite3_test_control(testctrl);
fprintf(p->out, "%d (0x%08x)\n", rc, rc);
src/sqlite.h.in
+2 -1
View File
@@ -6118,7 +6118,8 @@ int sqlite3_test_control(int op, ...);
#define SQLITE_TESTCTRL_EXPLAIN_STMT 19
#define SQLITE_TESTCTRL_NEVER_CORRUPT 20
#define SQLITE_TESTCTRL_VDBE_COVERAGE 21
#define SQLITE_TESTCTRL_LAST 21
#define SQLITE_TESTCTRL_BYTEORDER 22
#define SQLITE_TESTCTRL_LAST 22
/*
** CAPI3REF: SQLite Runtime Status
src/sqliteInt.h
+6 -3
View File
@@ -553,15 +553,18 @@ const int sqlite3one = 1;
#else
extern const int sqlite3one;
#endif
#if defined(i386) || defined(__i386__) || defined(_M_IX86)\
|| defined(__x86_64) || defined(__x86_64__)
#if defined(i386) || defined(__i386__) || defined(_M_IX86) \
|| defined(__x86_64) || defined(__x86_64__) || defined(_M_X64) \
|| defined(_M_AMD64) || defined(_M_ARM) || defined(__x86)
# define SQLITE_BYTEORDER 1234
# define SQLITE_BIGENDIAN 0
# define SQLITE_LITTLEENDIAN 1
# define SQLITE_UTF16NATIVE SQLITE_UTF16LE
#else
# define SQLITE_BYTEORDER 0 /* 0 means "unknown at compile-time" */
# define SQLITE_BIGENDIAN (*(char *)(&sqlite3one)==0)
# define SQLITE_LITTLEENDIAN (*(char *)(&sqlite3one)==1)
# define SQLITE_UTF16NATIVE (SQLITE_BIGENDIAN?SQLITE_UTF16BE:SQLITE_UTF16LE)
# define SQLITE_UTF16NATIVE (SQLITE_BIGENDIAN?SQLITE_UTF16BE:SQLITE_UTF16LE)
#endif
/*