[sql] Import reference version of SQLite 3.10.2.

third_party/sqlite/sqlite-src-3100200/src/mem1.c

 /*
 ** 2007 August 14
 **
 ** The author disclaims copyright to this source code.  In place of
 ** a legal notice, here is a blessing:
 **
 **    May you do good and not evil.
 **    May you find forgiveness for yourself and forgive others.
 **    May you share freely, never taking more than you give.
 **
@@ skipping 61 matching lines @@
 ** Also used by Apple systems if SQLITE_WITHOUT_ZONEMALLOC is defined.
 */
 #define SQLITE_MALLOC(x)             malloc(x)
 #define SQLITE_FREE(x)               free(x)
 #define SQLITE_REALLOC(x,y)          realloc((x),(y))
 
 /*
 ** The malloc.h header file is needed for malloc_usable_size() function
 ** on some systems (e.g. Linux).
 */
-#if defined(HAVE_MALLOC_H) && defined(HAVE_MALLOC_USABLE_SIZE)
-#  define SQLITE_USE_MALLOC_H
-#  define SQLITE_USE_MALLOC_USABLE_SIZE
+#if HAVE_MALLOC_H && HAVE_MALLOC_USABLE_SIZE
+#  define SQLITE_USE_MALLOC_H 1
+#  define SQLITE_USE_MALLOC_USABLE_SIZE 1
 /*
 ** The MSVCRT has malloc_usable_size(), but it is called _msize().  The
 ** use of _msize() is automatic, but can be disabled by compiling with
 ** -DSQLITE_WITHOUT_MSIZE.  Using the _msize() function also requires
 ** the malloc.h header file.
 */
 #elif defined(_MSC_VER) && !defined(SQLITE_WITHOUT_MSIZE)
 #  define SQLITE_USE_MALLOC_H
 #  define SQLITE_USE_MSIZE
 #endif
@@ skipping 70 matching lines @@
   SQLITE_FREE(p);
 #endif
 }
 
 /*
 ** Report the allocated size of a prior return from xMalloc()
 ** or xRealloc().
 */
 static int sqlite3MemSize(void *pPrior){
 #ifdef SQLITE_MALLOCSIZE
-  return pPrior ? (int)SQLITE_MALLOCSIZE(pPrior) : 0;
+  assert( pPrior!=0 );
+  return (int)SQLITE_MALLOCSIZE(pPrior);
 #else
   sqlite3_int64 *p;
-  if( pPrior==0 ) return 0;
+  assert( pPrior!=0 );
   p = (sqlite3_int64*)pPrior;
   p--;
   return (int)p[0];
 #endif
 }
 
 /*
 ** Like realloc().  Resize an allocation previously obtained from
 ** sqlite3MemMalloc().
 **
@@ skipping 97 matching lines @@
      sqlite3MemSize,
      sqlite3MemRoundup,
      sqlite3MemInit,
      sqlite3MemShutdown,
      0
   };
   sqlite3_config(SQLITE_CONFIG_MALLOC, &defaultMethods);
 }
 
 #endif /* SQLITE_SYSTEM_MALLOC */