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Overview
| Comment: | Force all qsort() calls in mkkeywordhash.c to be stable so that we get predictable results on different platforms. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
3b02df27ab63936226a90098d88535ed |
| User & Date: | drh 2009-11-03 13:08:17 |
Context
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2009-11-03
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| 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: 27d8e684 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: 3b02df27 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: d66a0f31 user: drh tags: trunk | |
Changes
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 1.38 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" ................................................................................ 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){ |
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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" "** 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" ................................................................................ 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){ |