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Overview
Comment:Add the SQLITE_RUNTIME_BYTEORDER compile-time option to force SQLite to check the processor byte-order at run-time. Add additional compile-time byte order checks for ARM, PPC, and SPARC.
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SHA1: 2c5363873a6f990a0abaacac6303acd46b48befc
User & Date: drh 2014-04-18 00:49:29.419
Context
2014-04-18
22:20
Clean up the proper-subset cost adjustment logic to make it more compact and easier to read and so that full branch test coverage is more easily obtained. (check-in: 9a5d38c79d user: drh tags: trunk)
12:38
Merge recent trunk changes into the threads branch. (check-in: 8729aa3e3e user: drh tags: threads)
01:10
Merge recent trunk changes into sessions. (check-in: 95e77efe07 user: drh tags: sessions)
00:49
Add the SQLITE_RUNTIME_BYTEORDER compile-time option to force SQLite to check the processor byte-order at run-time. Add additional compile-time byte order checks for ARM, PPC, and SPARC. (check-in: 2c5363873a user: drh tags: trunk)
00:06
Add the SQLITE_TESTCTRL_BYTEORDER test control to interrogate SQLite's notion of the processor byte order and whether the byte order is known at compile-time or determined at run-time. (check-in: 9c6961967a user: drh tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/sqliteInt.h.
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**
**    0.5 -> -10           0.1 -> -33        0.0625 -> -40
*/
typedef INT16_TYPE LogEst;

/*
** Macros to determine whether the machine is big or little endian,





** evaluated at runtime.
*/
#ifdef SQLITE_AMALGAMATION
const int sqlite3one = 1;
#else
extern const int sqlite3one;
#endif
#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)
#endif

/*







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**
**    0.5 -> -10           0.1 -> -33        0.0625 -> -40
*/
typedef INT16_TYPE LogEst;

/*
** Macros to determine whether the machine is big or little endian,
** and whether or not that determination is run-time or compile-time.
**
** For best performance, an attempt is made to guess at the byte-order
** using C-preprocessor macros.  If that is unsuccessful, or if
** -DSQLITE_RUNTIME_BYTEORDER=1 is set, then byte-order is determined
** at run-time.
*/
#ifdef SQLITE_AMALGAMATION
const int sqlite3one = 1;
#else
extern const int sqlite3one;
#endif
#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)   ||    \
     defined(__arm__)) && !defined(SQLITE_RUNTIME_BYTEORDER)
# define SQLITE_BYTEORDER    1234
# define SQLITE_BIGENDIAN    0
# define SQLITE_LITTLEENDIAN 1
# define SQLITE_UTF16NATIVE  SQLITE_UTF16LE
#endif
#if (defined(sparc)    || defined(__ppc__))  \
    && !defined(SQLITE_RUNTIME_BYTEORDER)
# define SQLITE_BYTEORDER    4321
# define SQLITE_BIGENDIAN    1
# define SQLITE_LITTLEENDIAN 0
# define SQLITE_UTF16NATIVE  SQLITE_UTF16BE
#endif
#if !defined(SQLITE_BYTEORDER)
# 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)
#endif

/*