774 lines
21 KiB
C
774 lines
21 KiB
C
/******************************************************************************
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Copyright (c) 1999 Daniel Stenberg
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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******************************************************************************/
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#include <stdio.h>
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#include <ctype.h>
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#include "cppdef.h"
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#include "cpp.h"
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#ifdef _AMIGA
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#include <proto/dos.h>
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#endif
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FILE_LOCAL void dump_line(struct Global *, int *);
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FILE_LOCAL ReturnCode doif(struct Global *, int);
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INLINE FILE_LOCAL ReturnCode doinclude(struct Global *);
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INLINE FILE_LOCAL int hasdirectory(char *, char *);
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/*
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* Generate (by hand-inspection) a set of unique values for each control
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* operator. Note that this is not guaranteed to work for non-Ascii
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* machines. CPP won't compile if there are hash conflicts.
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*/
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#define L_assert ('a' + ('s' << 1))
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#define L_define ('d' + ('f' << 1))
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#define L_elif ('e' + ('i' << 1))
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#define L_else ('e' + ('s' << 1))
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#define L_endif ('e' + ('d' << 1))
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#define L_error ('e' + ('r' << 1))
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#define L_if ('i' + (EOS << 1))
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#define L_ifdef ('i' + ('d' << 1))
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#define L_ifndef ('i' + ('n' << 1))
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#define L_include ('i' + ('c' << 1))
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#define L_line ('l' + ('n' << 1))
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#define L_nogood (EOS + (EOS << 1)) /* To catch #i */
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#define L_pragma ('p' + ('a' << 1))
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#define L_undef ('u' + ('d' << 1))
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ReturnCode control( struct Global *global,
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int *counter ) /* Pending newline counter */
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{
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/*
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* Process #control lines. Simple commands are processed inline,
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* while complex commands have their own subroutines.
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*
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* The counter is used to force out a newline before #line, and
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* #pragma commands. This prevents these commands from ending up at
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* the end of the previous line if cpp is invoked with the -C option.
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*/
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int c;
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char *tp;
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int hash;
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char *ep;
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ReturnCode ret;
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c = skipws( global );
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if( c == '\n' || c == EOF_CHAR )
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{
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(*counter)++;
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return(FPP_OK);
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}
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if( !isdigit(c) )
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scanid( global, c ); /* Get #word to tokenbuf */
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else
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{
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unget( global ); /* Hack -- allow #123 as a */
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strcpy( global->tokenbuf, "line" ); /* synonym for #line 123 */
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}
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hash = (global->tokenbuf[1] == EOS) ? L_nogood : (global->tokenbuf[0] + (global->tokenbuf[2] << 1));
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switch( hash )
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{
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case L_assert:
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tp = "assert";
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break;
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case L_define:
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tp = "define";
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break;
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case L_elif:
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tp = "elif";
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break;
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case L_else:
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tp = "else";
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break;
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case L_endif:
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tp = "endif";
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break;
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case L_error:
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tp = "error";
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break;
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case L_if:
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tp = "if";
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break;
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case L_ifdef:
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tp = "ifdef";
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break;
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case L_ifndef:
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tp = "ifndef";
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break;
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case L_include:
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tp = "include";
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break;
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case L_line:
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tp = "line";
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break;
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case L_pragma:
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tp = "pragma";
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break;
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case L_undef:
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tp = "undef";
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break;
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default:
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hash = L_nogood;
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case L_nogood:
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tp = "";
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break;
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}
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if( !streq( tp, global->tokenbuf ) )
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hash = L_nogood;
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/*
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* hash is set to a unique value corresponding to the
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* control keyword (or L_nogood if we think it's nonsense).
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*/
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if( global->infile->fp == NULL )
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cwarn( global, WARN_CONTROL_LINE_IN_MACRO, global->tokenbuf );
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if( !compiling )
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{ /* Not compiling now */
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switch( hash )
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{
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case L_if: /* These can't turn */
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case L_ifdef: /* compilation on, but */
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case L_ifndef: /* we must nest #if's */
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if( ++global->ifptr >= &global->ifstack[BLK_NEST] )
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{
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cfatal( global, FATAL_TOO_MANY_NESTINGS, global->tokenbuf );
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return( FPP_TOO_MANY_NESTED_STATEMENTS );
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}
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*global->ifptr = 0; /* !WAS_COMPILING */
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case L_line: /* Many */
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/*
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* Are pragma's always processed?
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*/
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case L_pragma: /* options */
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case L_include: /* are uninteresting */
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case L_define: /* if we */
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case L_undef: /* aren't */
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case L_assert: /* compiling. */
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case L_error:
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dump_line( global, counter ); /* Ignore rest of line */
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return(FPP_OK);
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}
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}
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/*
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* Make sure that #line and #pragma are output on a fresh line.
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*/
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if( *counter > 0 && (hash == L_line || hash == L_pragma) )
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{
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Putchar( global, '\n' );
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(*counter)--;
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}
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switch( hash )
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{
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case L_line:
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/*
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* Parse the line to update the line number and "progname"
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* field and line number for the next input line.
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* Set wrongline to force it out later.
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*/
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c = skipws( global );
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global->workp = global->work; /* Save name in work */
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while( c != '\n' && c != EOF_CHAR )
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{
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if( (ret = save( global, c )) )
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return(ret);
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c = get( global );
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}
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unget( global );
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if( (ret = save( global, EOS )) )
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return(ret);
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/*
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* Split #line argument into <line-number> and <name>
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* We subtract 1 as we want the number of the next line.
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*/
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global->line = atoi(global->work) - 1; /* Reset line number */
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for( tp = global->work; isdigit(*tp) || type[(unsigned)*tp] == SPA; tp++)
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; /* Skip over digits */
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if( *tp != EOS )
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{
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/* Got a filename, so: */
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if( *tp == '"' && (ep = strrchr(tp + 1, '"')) != NULL )
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{
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tp++; /* Skip over left quote */
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*ep = EOS; /* And ignore right one */
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}
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if( global->infile->progname != NULL )
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/* Give up the old name if it's allocated. */
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free( global->infile->progname );
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global->infile->progname = savestring( global, tp );
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}
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global->wrongline = TRUE; /* Force output later */
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break;
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case L_include:
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ret = doinclude( global );
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if( ret )
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return(ret);
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break;
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case L_define:
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ret = dodefine( global );
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if( ret )
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return(ret);
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break;
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case L_undef:
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doundef( global );
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break;
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case L_else:
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if( global->ifptr == &global->ifstack[0] )
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{
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cerror( global, ERROR_STRING_MUST_BE_IF, global->tokenbuf );
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dump_line( global, counter );
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return( FPP_OK );
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}
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else if( (*global->ifptr & ELSE_SEEN) != 0 )
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{
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cerror( global, ERROR_STRING_MAY_NOT_FOLLOW_ELSE, global->tokenbuf );
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dump_line( global, counter );
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return( FPP_OK );
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}
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*global->ifptr |= ELSE_SEEN;
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if( (*global->ifptr & WAS_COMPILING) != 0 )
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{
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if( compiling || (*global->ifptr & TRUE_SEEN) != 0 )
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compiling = FALSE;
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else
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{
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compiling = TRUE;
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}
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}
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break;
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case L_elif:
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if( global->ifptr == &global->ifstack[0] )
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{
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cerror( global, ERROR_STRING_MUST_BE_IF, global->tokenbuf );
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dump_line( global, counter );
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return( FPP_OK );
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}
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else if( (*global->ifptr & ELSE_SEEN) != 0 )
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{
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cerror( global, ERROR_STRING_MAY_NOT_FOLLOW_ELSE, global->tokenbuf );
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dump_line( global, counter );
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return( FPP_OK );
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}
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if( (*global->ifptr & (WAS_COMPILING | TRUE_SEEN)) != WAS_COMPILING )
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{
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compiling = FALSE; /* Done compiling stuff */
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dump_line( global, counter ); /* Skip this clause */
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return( FPP_OK );
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}
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ret = doif( global, L_if );
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if( ret )
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return(ret);
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break;
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case L_error:
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cerror(global, ERROR_ERROR);
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break;
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case L_if:
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case L_ifdef:
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case L_ifndef:
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if( ++global->ifptr < &global->ifstack[BLK_NEST] )
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{
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*global->ifptr = WAS_COMPILING;
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ret = doif( global, hash );
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if( ret )
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return(ret);
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break;
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}
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cfatal( global, FATAL_TOO_MANY_NESTINGS, global->tokenbuf );
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return( FPP_TOO_MANY_NESTED_STATEMENTS );
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case L_endif:
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if( global->ifptr == &global->ifstack[0] )
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{
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cerror( global, ERROR_STRING_MUST_BE_IF, global->tokenbuf );
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dump_line( global, counter );
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return(FPP_OK);
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}
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if( !compiling && (*global->ifptr & WAS_COMPILING) != 0 )
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global->wrongline = TRUE;
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compiling = ((*global->ifptr & WAS_COMPILING) != 0);
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--global->ifptr;
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break;
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case L_assert:
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{
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int result;
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ret = eval( global, &result );
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if(ret)
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return(ret);
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if( result == 0 )
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cerror( global, ERROR_PREPROC_FAILURE );
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}
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break;
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case L_pragma:
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/*
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* #pragma is provided to pass "options" to later
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* passes of the compiler. cpp doesn't have any yet.
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*/
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Putstring( global, "#pragma " );
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while( (c = get( global ) ) != '\n' && c != EOF_CHAR )
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Putchar( global, c );
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unget( global );
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Putchar( global, '\n' );
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break;
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default:
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/*
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* Undefined #control keyword.
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* Note: the correct behavior may be to warn and
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* pass the line to a subsequent compiler pass.
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* This would allow #asm or similar extensions.
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*/
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if( global->warnillegalcpp )
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cwarn( global, WARN_ILLEGAL_COMMAND, global->tokenbuf );
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Putchar( global, '#' );
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Putstring( global, global->tokenbuf );
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Putchar( global, ' ' );
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while( (c = get( global ) ) != '\n' && c != EOF_CHAR )
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Putchar( global, c );
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unget( global );
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Putchar( global, '\n' );
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break;
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}
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if( hash != L_include )
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{
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#if OLD_PREPROCESSOR
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/*
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* Ignore the rest of the #control line so you can write
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* #if foo
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* #endif foo
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*/
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dump_line( global, counter ); /* Take common exit */
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return( FPP_OK );
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#else
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if( skipws( global ) != '\n' )
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{
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cwarn( global, WARN_UNEXPECTED_TEXT_IGNORED );
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skipnl( global );
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}
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#endif
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}
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(*counter)++;
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return( FPP_OK );
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}
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FILE_LOCAL
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void dump_line(struct Global *global, int *counter)
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{
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skipnl( global ); /* Ignore rest of line */
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(*counter)++;
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}
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FILE_LOCAL
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ReturnCode doif(struct Global *global, int hash)
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{
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/*
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* Process an #if, #ifdef, or #ifndef. The latter two are straightforward,
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* while #if needs a subroutine of its own to evaluate the expression.
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*
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* doif() is called only if compiling is TRUE. If false, compilation
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* is always supressed, so we don't need to evaluate anything. This
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* supresses unnecessary warnings.
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*/
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int c;
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int found;
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ReturnCode ret;
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if( (c = skipws( global ) ) == '\n' || c == EOF_CHAR )
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{
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unget( global );
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cerror( global, ERROR_MISSING_ARGUMENT );
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#if !OLD_PREPROCESSOR
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skipnl( global ); /* Prevent an extra */
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unget( global ); /* Error message */
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#endif
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return(FPP_OK);
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}
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if( hash == L_if )
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{
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unget( global );
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ret = eval( global, &found );
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if( ret )
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return( ret );
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found = (found != 0); /* Evaluate expr, != 0 is TRUE */
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hash = L_ifdef; /* #if is now like #ifdef */
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}
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else
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{
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if( type[c] != LET )
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{ /* Next non-blank isn't letter */
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/* ... is an error */
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cerror( global, ERROR_MISSING_ARGUMENT );
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#if !OLD_PREPROCESSOR
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skipnl( global ); /* Prevent an extra */
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unget( global ); /* Error message */
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#endif
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return(FPP_OK);
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}
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found = ( lookid( global, c ) != NULL ); /* Look for it in symbol table */
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}
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if( found == (hash == L_ifdef) )
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{
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compiling = TRUE;
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*global->ifptr |= TRUE_SEEN;
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}
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else
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compiling = FALSE;
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return(FPP_OK);
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}
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|
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INLINE FILE_LOCAL
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ReturnCode doinclude( struct Global *global )
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{
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/*
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* Process the #include control line.
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* There are three variations:
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*
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* #include "file" search somewhere relative to the
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* current source file, if not found,
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* treat as #include <file>.
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*
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* #include <file> Search in an implementation-dependent
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* list of places.
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*
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* #include token Expand the token, it must be one of
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* "file" or <file>, process as such.
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*
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* Note: the November 12 draft forbids '>' in the #include <file> format.
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* This restriction is unnecessary and not implemented.
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*/
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int c;
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int delim;
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ReturnCode ret;
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delim = skipws( global );
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if( (ret = macroid( global, &delim )) )
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return(ret);
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if( delim != '<' && delim != '"' )
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{
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cerror( global, ERROR_INCLUDE_SYNTAX );
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return( FPP_OK );
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}
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if( delim == '<' )
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delim = '>';
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global->workp = global->work;
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while( (c = get(global)) != '\n' && c != EOF_CHAR )
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if( (ret = save( global, c )) ) /* Put it away. */
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return( ret );
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unget( global ); /* Force nl after include */
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/*
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* The draft is unclear if the following should be done.
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*/
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while( --global->workp >= global->work &&
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(*global->workp == ' ' || *global->workp == '\t') )
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; /* Trim blanks from filename */
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if( *global->workp != delim )
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{
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cerror( global, ERROR_INCLUDE_SYNTAX );
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return(FPP_OK);
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}
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*global->workp = EOS; /* Terminate filename */
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ret = openinclude( global, global->work, (delim == '"') );
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|
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if( ret && global->warnnoinclude )
|
|
{
|
|
/*
|
|
* Warn if #include file isn't there.
|
|
*/
|
|
cwarn( global, WARN_CANNOT_OPEN_INCLUDE, global->work );
|
|
}
|
|
|
|
return( FPP_OK );
|
|
}
|
|
|
|
#ifdef _AMIGA
|
|
ReturnCode MultiAssignLoad( struct Global *global, char *incptr, char *filename, char *tmpname );
|
|
#endif
|
|
|
|
ReturnCode openinclude( struct Global *global,
|
|
char *filename, /* Input file name */
|
|
int searchlocal ) /* TRUE if #include "file" */
|
|
{
|
|
/*
|
|
* Actually open an include file. This routine is only called from
|
|
* doinclude() above, but was written as a separate subroutine for
|
|
* programmer convenience. It searches the list of directories
|
|
* and actually opens the file, linking it into the list of
|
|
* active files. Returns ReturnCode. No error message is printed.
|
|
*/
|
|
|
|
char **incptr;
|
|
char tmpname[NWORK]; /* Filename work area */
|
|
size_t len;
|
|
|
|
if( filename[0] == '/' )
|
|
{
|
|
if( ! openfile( global, filename ) )
|
|
return(FPP_OK);
|
|
}
|
|
|
|
if( searchlocal )
|
|
{
|
|
/*
|
|
* Look in local directory first.
|
|
* Try to open filename relative to the directory of the current
|
|
* source file (as opposed to the current directory). (ARF, SCK).
|
|
* Note that the fully qualified pathname is always built by
|
|
* discarding the last pathname component of the source file
|
|
* name then tacking on the #include argument.
|
|
*/
|
|
if( hasdirectory( global->infile->filename, tmpname ) )
|
|
strcat( tmpname, filename );
|
|
else
|
|
strcpy( tmpname, filename );
|
|
|
|
if( ! openfile( global, tmpname ) )
|
|
return(FPP_OK);
|
|
}
|
|
|
|
/*
|
|
* Look in any directories specified by -I command line
|
|
* arguments, then in the builtin search list.
|
|
*/
|
|
for( incptr = global->incdir; incptr < global->incend; incptr++ )
|
|
{
|
|
len = strlen(*incptr);
|
|
|
|
if( len + strlen(filename) >= sizeof(tmpname) )
|
|
{
|
|
cfatal( global, FATAL_FILENAME_BUFFER_OVERFLOW );
|
|
|
|
return( FPP_FILENAME_BUFFER_OVERFLOW );
|
|
}
|
|
else
|
|
{
|
|
if( (*incptr)[len-1] != '/' )
|
|
sprintf( tmpname, "%s/%s", *incptr, filename );
|
|
else
|
|
sprintf( tmpname, "%s%s", *incptr, filename );
|
|
|
|
if( !openfile( global, tmpname ) )
|
|
return(FPP_OK);
|
|
}
|
|
}
|
|
|
|
return( FPP_NO_INCLUDE );
|
|
}
|
|
|
|
INLINE FILE_LOCAL
|
|
int hasdirectory( char *source, /* Directory to examine */
|
|
char *result ) /* Put directory stuff here */
|
|
{
|
|
/*
|
|
* If a device or directory is found in the source filename string, the
|
|
* node/device/directory part of the string is copied to result and
|
|
* hasdirectory returns TRUE. Else, nothing is copied and it returns FALSE.
|
|
*/
|
|
|
|
char *tp2;
|
|
|
|
if( (tp2 = strrchr( source, '/' ) ) == NULL )
|
|
return(FALSE);
|
|
|
|
strncpy( result, source, tp2 - source + 1 );
|
|
|
|
result[tp2 - source + 1] = EOS;
|
|
|
|
return( TRUE );
|
|
}
|
|
|
|
#ifdef _AMIGA
|
|
//
|
|
// amp July 9, 1997
|
|
//
|
|
// Use the OS Luke...
|
|
//
|
|
// We do the sneaky version and let the OS do all
|
|
// the hard work so we don't have to mess around
|
|
// a lot ;)
|
|
//
|
|
ReturnCode MultiAssignLoad( struct Global *global, char *incptr, char *filename, char *tmpname )
|
|
|
|
{ /* MultiAssignLoad */
|
|
|
|
struct MsgPort *FSTask;
|
|
struct DevProc *DevProc = NULL;
|
|
LONG RtnCode = FPP_NO_INCLUDE;
|
|
|
|
FSTask = GetFileSysTask();
|
|
|
|
do
|
|
{
|
|
//
|
|
// This should not bring up a requester.
|
|
// check to see if cpp does in fact tweek
|
|
// the process WindowPtr.
|
|
//
|
|
DevProc = GetDeviceProc( incptr, DevProc );
|
|
|
|
if( DevProc )
|
|
{
|
|
SetFileSysTask( DevProc->dvp_Port );
|
|
|
|
//
|
|
// Normally we would pass the lock and filename
|
|
// to the Load() routine, which would CD to the
|
|
// directory and Open(filename), but in order to
|
|
// satisfy the exisiting openfile() function, we
|
|
// bite the bullet and build the complete pathspec
|
|
// rather than add the standard Load() routine.
|
|
//
|
|
if( NameFromLock( DevProc->dvp_Lock, tmpname, NWORK ) )
|
|
{
|
|
AddPart( tmpname, filename, NWORK );
|
|
|
|
RtnCode = openfile( global, tmpname );
|
|
|
|
if( ! RtnCode )
|
|
break;
|
|
}
|
|
}
|
|
|
|
} while ( RtnCode &&
|
|
DevProc &&
|
|
(DevProc->dvp_Flags & DVPF_ASSIGN) &&
|
|
IoErr() == ERROR_OBJECT_NOT_FOUND); /* repeat if multi-assign */
|
|
|
|
SetFileSysTask( FSTask );
|
|
|
|
if( DevProc )
|
|
FreeDeviceProc( DevProc );
|
|
|
|
return RtnCode;
|
|
|
|
} /* MultiAssignLoad */
|
|
#endif //_AMIGA
|