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Overview
Comment:An optimization to sqlite3VdbeSerialType(). (CVS 2278)
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SHA1: db36773830cc81c38b78d1776a495d49475523be
User & Date: drh 2005-01-26 17:47:03.000
Context
2005-01-26
21:55
Propagate detected database corruption up through the call stack. (CVS 2279) (check-in: 2c54aba5ba user: drh tags: trunk)
17:47
An optimization to sqlite3VdbeSerialType(). (CVS 2278) (check-in: db36773830 user: drh tags: trunk)
10:39
Add an entry to faq.tcl regarding SQLITE_SCHEMA errors. (CVS 2277) (check-in: 12defe8cd6 user: danielk1977 tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/vdbeaux.c.
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  if( flags&MEM_Null ){
    return 0;
  }
  if( flags&MEM_Int ){
    /* Figure out whether to use 1, 2, 4, 6 or 8 bytes. */
#   define MAX_6BYTE ((((i64)0x00010000)<<32)-1)
    i64 i = pMem->i;

    if( i>=-127 && i<=127 ) return 1;
    if( i>=-32767 && i<=32767 ) return 2;
    if( i>=-8388607 && i<=8388607 ) return 3;
    if( i>=-2147483647 && i<=2147483647 ) return 4;
    if( i>=-MAX_6BYTE && i<=MAX_6BYTE ) return 5;
    return 6;
  }
  if( flags&MEM_Real ){
    return 7;
  }
  if( flags&MEM_Str ){
    int n = pMem->n;








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1496
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  if( flags&MEM_Null ){
    return 0;
  }
  if( flags&MEM_Int ){
    /* Figure out whether to use 1, 2, 4, 6 or 8 bytes. */
#   define MAX_6BYTE ((((i64)0x00010000)<<32)-1)
    i64 i = pMem->i;
    u64 u = i<0 ? -i : i;
    if( u<=127 ) return 1;
    if( u<=32767 ) return 2;
    if( u<=8388607 ) return 3;
    if( u<=2147483647 ) return 4;
    if( u<=MAX_6BYTE ) return 5;
    return 6;
  }
  if( flags&MEM_Real ){
    return 7;
  }
  if( flags&MEM_Str ){
    int n = pMem->n;
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