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Overview
Comment:Avoid surplus bytes at the end of the keyword string table. Add testcase() macros to make sure all keywords are used during testing. (CVS 6090)
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SHA1: 73958060aaf641d93bede3a42851e5b3451f5432
User & Date: drh 2008-12-31 21:52:41.000
Context
2009-01-01
04:19
Fix a bug parsing "<expr> AND (abc NEAR def)" in fts3_expr.c. (CVS 6091) (check-in: d1a6a2edd7 user: danielk1977 tags: trunk)
2008-12-31
21:52
Avoid surplus bytes at the end of the keyword string table. Add testcase() macros to make sure all keywords are used during testing. (CVS 6090) (check-in: 73958060aa user: drh tags: trunk)
19:27
Fix the name in the documentation of the compile-time macro for enabling FTS3 parenthesis processing. (CVS 6089) (check-in: ac8258da6e user: drh tags: trunk)
Changes
Side-by-Side Diff Ignore Whitespace Patch
Changes to tool/mkkeywordhash.c.
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** A header comment placed at the beginning of generated code.
*/
static const char zHdr[] = 
  "/***** This file contains automatically generated code ******\n"
  "**\n"
  "** The code in this file has been automatically generated by\n"
  "**\n"
  "**     $Header: /home/drh/sqlite/trans/cvs/sqlite/sqlite/tool/mkkeywordhash.c,v 1.35 2008/12/17 17:30:26 danielk1977 Exp $\n"
  "**     $Header: /home/drh/sqlite/trans/cvs/sqlite/sqlite/tool/mkkeywordhash.c,v 1.36 2008/12/31 21:52:41 drh Exp $\n"
  "**\n"
  "** The code in this file implements a function that determines whether\n"
  "** or not a given identifier is really an SQL keyword.  The same thing\n"
  "** might be implemented more directly using a hand-written hash table.\n"
  "** But by using this automatically generated code, the size of the code\n"
  "** is substantially reduced.  This is important for embedded applications\n"
  "** on platforms with limited memory.\n"
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    }
    printf("%s", p->zName);
    j += p->len;
  }
  if( j>0 ){
    printf("%*s */\n", 74-j, "");
  }
  printf("  static const char zText[%d] = {\n", nChar+1);
  for(i=j=0; i<=k; i++){
  printf("  static const char zText[%d] = {\n", nChar);
  zText[nChar] = 0;
  for(i=j=0; i<k; i++){
    if( j==0 ){
      printf("    ");
    }
    if( zText[i]==0 ){
      printf("0");
    }else{
      printf("'%c',", zText[i]);
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  printf("  if( n<2 ) return TK_ID;\n");
  printf("  h = ((charMap(z[0])*4) ^\n"
         "      (charMap(z[n-1])*3) ^\n"
         "      n) %% %d;\n", bestSize);
  printf("  for(i=((int)aHash[h])-1; i>=0; i=((int)aNext[i])-1){\n");
  printf("    if( aLen[i]==n &&"
                   " sqlite3StrNICmp(&zText[aOffset[i]],z,n)==0 ){\n");
  for(i=0; i<nKeyword; i++){
    printf("      testcase( i==%d ); /* %s */\n",
           i, aKeywordTable[i].zTokenType);
  }
  printf("      return aCode[i];\n");
  printf("    }\n");
  printf("  }\n");
  printf("  return TK_ID;\n");
  printf("}\n");
  printf("int sqlite3KeywordCode(const unsigned char *z, int n){\n");
  printf("  return keywordCode((char*)z, n);\n");
  printf("}\n");

  return 0;
}