/* * Copyright 1993, 2000 Christopher Seiwald. * * This file is part of Jam - see jam.c for Copyright information. */ /* * headers.c - handle #includes in source files * * Using regular expressions provided as the variable $(HDRSCAN), * headers() searches a file for #include files and phonies up a * rule invocation: * * $(HDRRULE) : ; * * External routines: * headers() - scan a target for include files and call HDRRULE * * Internal routines: * headers1() - using regexp, scan a file and build include LIST * * 04/13/94 (seiwald) - added shorthand L0 for null list pointer * 09/10/00 (seiwald) - replaced call to compile_rule with evaluate_rule, * so that headers() doesn't have to mock up a parse structure * just to invoke a rule. * 03/02/02 (seiwald) - rules can be invoked via variable names * 10/22/02 (seiwald) - list_new() now does its own newstr()/copystr() * 11/04/02 (seiwald) - const-ing for string literals */ # include "jam.h" # include "lists.h" # include "parse.h" # include "compile.h" # include "rules.h" # include "variable.h" # include "regexp.h" # include "headers.h" # include "newstr.h" static LIST *headers1( LIST *l, const char *file, int rec, regexp *re[] ); /* * headers() - scan a target for include files and call HDRRULE */ # define MAXINC 10 void headers( TARGET *t ) { LIST *hdrscan; LIST *hdrrule; LIST *headlist = 0; LOL lol; regexp *re[ MAXINC ]; int rec = 0; if( !( hdrscan = var_get( "HDRSCAN" ) ) || !( hdrrule = var_get( "HDRRULE" ) ) ) return; if( DEBUG_HEADER ) printf( "header scan %s\n", t->name ); /* Compile all regular expressions in HDRSCAN */ while( rec < MAXINC && hdrscan ) { re[rec++] = regcomp( hdrscan->string ); hdrscan = list_next( hdrscan ); } /* Doctor up call to HDRRULE rule */ /* Call headers1() to get LIST of included files. */ lol_init( &lol ); lol_add( &lol, list_new( L0, t->name, 1 ) ); lol_add( &lol, headers1( headlist, t->boundname, rec, re ) ); if( lol_get( &lol, 1 ) ) list_free( evaluate_rule( hdrrule->string, &lol, L0 ) ); /* Clean up */ lol_free( &lol ); while( rec ) free( (char *)re[--rec] ); } /* * headers1() - using regexp, scan a file and build include LIST */ static LIST * headers1( LIST *result, const char *file, int rec, regexp *re[] ) { FILE *f; char buf[ 1024 ]; int i; if( !( f = fopen( file, "r" ) ) ) return result; while( fgets( buf, sizeof( buf ), f ) ) { for( i = 0; i < rec; i++ ) if( regexec( re[i], buf ) && re[i]->startp[1] ) { /* Copy and terminate extracted string. */ char buf2[ MAXSYM ]; int l = re[i]->endp[1] - re[i]->startp[1]; memcpy( buf2, re[i]->startp[1], l ); buf2[ l ] = 0; result = list_new( result, buf2, 0 ); if( DEBUG_HEADER ) printf( "header found: %s\n", buf2 ); } } fclose( f ); return result; }