/* * Copyright 1993, 1995 Christopher Seiwald. * * This file is part of Jam - see jam.c for Copyright information. */ # include "jam.h" # include "newstr.h" # include "hash.h" /* * newstr.c - string manipulation routines * * To minimize string copying, string creation, copying, and freeing * is done through newstr. * * External functions: * * newstr() - return a malloc'ed copy of a string * copystr() - return a copy of a string previously returned by newstr() * freestr() - free a string returned by newstr() or copystr() * donestr() - free string tables * * Once a string is passed to newstr(), the returned string is readonly. * * This implementation builds a hash table of all strings, so that multiple * calls of newstr() on the same string allocate memory for the string once. * Strings are never actually freed. */ typedef char *STRING; static struct hash *strhash = 0; static int strtotal = 0; /* * newstr() - return a malloc'ed copy of a string */ char * newstr( string ) char *string; { STRING str, *s = &str; if( !strhash ) strhash = hashinit( sizeof( STRING ), "strings" ); *s = string; if( hashenter( strhash, (HASHDATA **)&s ) ) { int l = strlen( string ); char *m = (char *)malloc( l + 1 ); strtotal += l + 1; memcpy( m, string, l + 1 ); *s = m; } return *s; } /* * copystr() - return a copy of a string previously returned by newstr() */ char * copystr( s ) char *s; { return s; } /* * freestr() - free a string returned by newstr() or copystr() */ void freestr( s ) char *s; { } /* * donestr() - free string tables */ void donestr() { hashdone( strhash ); if( DEBUG_MEM ) printf( "%dK in strings\n", strtotal / 1024 ); }
# | Change | User | Description | Committed | |
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#5 | 2493 | rmg |
Rewrite the past: update all jam's source with comments to reflect changes since about 2.3, very early 2001. Whitespace only change. === computer:1666: Change 37660 by seiwald@play-seiwald on 2002/11/06 22:41:35 Note: I regenerated jamgram.c on my linux 7.3 system prior to the submit, since patch was so unhappy trying to lay down the changes from Christopher's change. Presumably this is just due to different yacc/bison/whatever particulars on the system where Christopher made the changes originally. - rmg |
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#4 | 2491 | rmg |
Some consting in jam to make it more compilable by C++ compilers. No functional change. === computer:1666: Change 37433 by perforce@perforce on 2002/10/30 16:08:51 Recreational const-ing of jam, for compilers that don't allow "string" to be passed as a non-const char *. This included a few places where we were modifying what could possibly have been read-only storage, oddly enough. No functional change. === computer:1666: Change 37602 by seiwald@play-seiwald on 2002/11/04 17:25:40 |
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#3 | 1345 | rmg |
Adds a DEBUG_MEM debugging message. Integrates Change 403 by Grant Glouser. cc: Grant_Glouser@palm.com, rmg@perforce.com |
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#2 | 486 | Perforce staff |
Jam 2.3. See RELNOTES for a list of changes from 2.2.x. Just about every source file was touched when jam got ANSI-fied. |
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#1 | 2 | laura | Add Jam/MR 2.2 source |