SQLite

Check-in [3b02df27ab]
Login

Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

Overview
Comment:Force all qsort() calls in mkkeywordhash.c to be stable so that we get predictable results on different platforms.
Downloads: Tarball | ZIP archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: 3b02df27ab63936226a90098d88535ed19c2b782
User & Date: drh 2009-11-03 13:08:17.000
Context
2009-11-03
19:18
Enhancements to lemon to generate more compact action tables and to avoid making array bounds tests that can never fail on action table calculations. (check-in: 27d8e684db user: drh tags: trunk)
13:08
Force all qsort() calls in mkkeywordhash.c to be stable so that we get predictable results on different platforms. (check-in: 3b02df27ab user: drh tags: trunk)
13:02
Adjust the lemon implementation so that it always computes the same PDA regardless of qsort() implementation on the host platform. In other words, make all sorts in lemon stable. (check-in: d66a0f31eb user: drh tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to tool/mkkeywordhash.c.
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
** 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 1.38 2009/06/09 14:27:41 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"







|







12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
** 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"
  "**   sqlite/tool/mkkeywordhash.c\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"
297
298
299
300
301
302
303

304
305
306
307
308
309
310
311
312

313
314
315
316
317
318


319
320
321
322
323
324
325
static int keywordCompare1(const void *a, const void *b){
  const Keyword *pA = (Keyword*)a;
  const Keyword *pB = (Keyword*)b;
  int n = pA->len - pB->len;
  if( n==0 ){
    n = strcmp(pA->zName, pB->zName);
  }

  return n;
}
static int keywordCompare2(const void *a, const void *b){
  const Keyword *pA = (Keyword*)a;
  const Keyword *pB = (Keyword*)b;
  int n = pB->longestSuffix - pA->longestSuffix;
  if( n==0 ){
    n = strcmp(pA->zName, pB->zName);
  }

  return n;
}
static int keywordCompare3(const void *a, const void *b){
  const Keyword *pA = (Keyword*)a;
  const Keyword *pB = (Keyword*)b;
  int n = pA->offset - pB->offset;


  return n;
}

/*
** Return a KeywordTable entry with the given id
*/
static Keyword *findById(int id){







>









>






>
>







297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
static int keywordCompare1(const void *a, const void *b){
  const Keyword *pA = (Keyword*)a;
  const Keyword *pB = (Keyword*)b;
  int n = pA->len - pB->len;
  if( n==0 ){
    n = strcmp(pA->zName, pB->zName);
  }
  assert( n!=0 );
  return n;
}
static int keywordCompare2(const void *a, const void *b){
  const Keyword *pA = (Keyword*)a;
  const Keyword *pB = (Keyword*)b;
  int n = pB->longestSuffix - pA->longestSuffix;
  if( n==0 ){
    n = strcmp(pA->zName, pB->zName);
  }
  assert( n!=0 );
  return n;
}
static int keywordCompare3(const void *a, const void *b){
  const Keyword *pA = (Keyword*)a;
  const Keyword *pB = (Keyword*)b;
  int n = pA->offset - pB->offset;
  if( n==0 ) n = pB->id - pA->id;
  assert( n!=0 );
  return n;
}

/*
** Return a KeywordTable entry with the given id
*/
static Keyword *findById(int id){