413 lines
9 KiB
C
413 lines
9 KiB
C
/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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/* $Header$ */
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/* MAIN PROGRAM */
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#include "nofloat.h"
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#include <system.h>
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#include "nopp.h"
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#include "target_sizes.h"
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#include "debug.h"
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#include "use_tmp.h"
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#include "maxincl.h"
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#include "inputtype.h"
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#include "input.h"
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#include "level.h"
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#include "idf.h"
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#include "arith.h"
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#include "type.h"
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#include "declar.h"
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#include "tokenname.h"
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#include "Lpars.h"
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#include "LLlex.h"
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#include <alloc.h>
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#include "specials.h"
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extern struct tokenname tkidf[], tkother[];
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extern char *symbol2str();
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char options[128]; /* one for every char */
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#ifndef NOPP
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int inc_pos = 1; /* place where next -I goes */
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char *inctable[MAXINCL] = { /* list for includes */
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".",
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"/usr/include",
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0
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};
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extern char *getwdir();
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#endif NOPP
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struct sp_id special_ids[] = {
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{"setjmp", SP_SETJMP}, /* non-local goto's are registered */
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{0, 0}
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};
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arith
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short_size = SZ_SHORT,
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word_size = SZ_WORD,
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dword_size = (2 * SZ_WORD),
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int_size = SZ_INT,
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long_size = SZ_LONG,
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#ifndef NOFLOAT
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float_size = SZ_FLOAT,
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double_size = SZ_DOUBLE,
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#endif NOFLOAT
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pointer_size = SZ_POINTER;
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int
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short_align = AL_SHORT,
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word_align = AL_WORD,
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int_align = AL_INT,
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long_align = AL_LONG,
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#ifndef NOFLOAT
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float_align = AL_FLOAT,
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double_align = AL_DOUBLE,
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#endif NOFLOAT
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pointer_align = AL_POINTER,
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struct_align = AL_STRUCT,
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union_align = AL_UNION;
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#ifndef NOPP
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arith ifval; /* ifval will contain the result of the #if expression */
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#endif NOPP
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char *prog_name;
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main(argc, argv)
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char *argv[];
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{
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/* parse and interpret the command line options */
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prog_name = argv[0];
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init_hmask();
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#ifndef NOPP
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init_pp(); /* initialise the preprocessor macros */
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#endif NOPP
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/* Note: source file "-" indicates that the source is supplied
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as standard input. This is only allowed if INP_READ_IN_ONE is
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not defined!
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*/
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#ifdef INP_READ_IN_ONE
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while (argc > 1 && *argv[1] == '-')
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#else INP_READ_IN_ONE
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while (argc > 1 && *argv[1] == '-' && argv[1][1] != '\0')
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#endif INP_READ_IN_ONE
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{
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char *par = &argv[1][1];
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do_option(par);
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argc--, argv++;
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}
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compile(argc - 1, &argv[1]);
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#ifdef DEBUG
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hash_stat();
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#endif DEBUG
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exit(err_occurred);
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}
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char *source = 0;
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char *nmlist = 0;
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#ifdef USE_TMP
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extern char *mktemp(); /* library routine */
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char *tmpfdir = "/tmp"; /* where to keep the temporary file */
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static char *tmpfname = "/Cem.XXXXXX";
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char *tmpfile = 0;
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#endif USE_TMP
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compile(argc, argv)
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char *argv[];
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{
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#ifdef USE_TMP
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char tmpf[256];
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#endif
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char *result;
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register char *destination = 0;
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#ifdef DEBUG
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#ifndef NOPP
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int pp_only = options['E'] || options['P'] || options['C'];
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#endif NOPP
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#endif
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switch (argc) {
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case 1:
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#ifdef DEBUG
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#ifndef NOPP
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if (!pp_only)
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#endif NOPP
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#endif
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fatal("%s: destination file not specified", prog_name);
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break;
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case 2:
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destination = argv[1];
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break;
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case 3:
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nmlist = argv[2];
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destination = argv[1];
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break;
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default:
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fatal("use: %s source destination [namelist]", prog_name);
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break;
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}
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source = strcmp(argv[0], "-") ? argv[0] : 0;
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#ifdef USE_TMP
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if (! options['N']) {
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strcpy(tmpf, tmpfdir);
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strcat(tmpf, tmpfname);
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tmpfile = mktemp(tmpf);
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}
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#endif USE_TMP
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if (destination && strcmp(destination, "-") == 0)
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destination = 0;
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if (!InsertFile(source, (char **) 0, &result)) /* read the source file */
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fatal("%s: no source file %s\n", prog_name,
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source ? source : "stdin");
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File_Inserted = 1;
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init();
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FileName = source;
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LineNumber = 0;
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#ifndef NOPP
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WorkingDir = getwdir(source);
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#endif NOPP
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PushLex();
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#ifdef DEBUG
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#ifndef NOPP
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if (pp_only) /* run the preprocessor as if it is stand-alone */
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preprocess();
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else
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#endif NOPP
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#endif DEBUG
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{
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#ifdef USE_TMP
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if (!options['N']) {
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init_code(tmpfile);
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}
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else
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#endif USE_TMP
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init_code(destination);
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/* compile the source text */
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C_program();
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end_code();
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#ifdef USE_TMP
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if (! options['N']) {
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prepend_scopes(destination);
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AppendFile(tmpfile, destination);
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sys_remove(tmpfile);
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}
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#endif USE_TMP
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#ifdef DEBUG
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if (options['u']) {
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unstack_level(); /* unstack L_GLOBAL */
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}
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if (options['f'] || options['t'])
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dumpidftab("end of main", options['f'] ? 0 : 0);
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#endif DEBUG
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}
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PopLex();
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}
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init()
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{
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init_cst(); /* initialize variables of "cstoper.c" */
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reserve(tkidf); /* mark the C reserved words as such */
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init_specials(special_ids); /* mark special ids as such */
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if (options['R'])
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reserve(tkother);
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char_type = standard_type(CHAR, 0, 1, (arith)1);
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uchar_type = standard_type(CHAR, UNSIGNED, 1, (arith)1);
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short_type = standard_type(SHORT, 0, short_align, short_size);
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ushort_type = standard_type(SHORT, UNSIGNED, short_align, short_size);
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/* Treat type `word' as `int', having its own size and
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alignment requirements.
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This type is transparent to the user.
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*/
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word_type = standard_type(INT, 0, word_align, word_size);
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uword_type = standard_type(INT, UNSIGNED, word_align, word_size);
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int_type = standard_type(INT, 0, int_align, int_size);
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uint_type = standard_type(INT, UNSIGNED, int_align, int_size);
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long_type = standard_type(LONG, 0, long_align, long_size);
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ulong_type = standard_type(LONG, UNSIGNED, long_align, long_size);
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#ifndef NOFLOAT
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float_type = standard_type(FLOAT, 0, float_align, float_size);
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double_type = standard_type(DOUBLE, 0, double_align, double_size);
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#endif NOFLOAT
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void_type = standard_type(VOID, 0, 1, (arith)0);
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label_type = standard_type(LABEL, 0, 0, (arith)0);
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error_type = standard_type(ERRONEOUS, 0, 1, (arith)1);
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/* Pointer Arithmetic type: all arithmetics concerning
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pointers is supposed to be performed in the
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pointer arithmetic type which is equal to either
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int_type or long_type, depending on the pointer_size
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*/
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if (pointer_size == word_size)
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pa_type = word_type;
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else
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if (pointer_size == short_size)
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pa_type = short_type;
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else
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if (pointer_size == int_size)
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pa_type = int_type;
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else
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if (pointer_size == long_size)
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pa_type = long_type;
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else
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fatal("pointer size incompatible with any integral size");
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if (int_size != word_size)
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fatal("int_size and word_size are not equal");
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if (short_size > int_size || int_size > long_size)
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fatal("sizes of short/int/long decreasing");
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/* Build a type for function returning int, RM 13 */
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funint_type = construct_type(FUNCTION, int_type, (arith)0);
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string_type = construct_type(POINTER, char_type, (arith)0);
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/* Define the standard type identifiers. */
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add_def(str2idf("char"), TYPEDEF, char_type, L_UNIVERSAL);
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add_def(str2idf("int"), TYPEDEF, int_type, L_UNIVERSAL);
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#ifndef NOFLOAT
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add_def(str2idf("float"), TYPEDEF, float_type, L_UNIVERSAL);
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add_def(str2idf("double"), TYPEDEF, double_type, L_UNIVERSAL);
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#endif NOFLOAT
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add_def(str2idf("void"), TYPEDEF, void_type, L_UNIVERSAL);
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stack_level();
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}
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init_specials(si)
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register struct sp_id *si;
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{
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while (si->si_identifier) {
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struct idf *idf = str2idf(si->si_identifier);
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if (idf->id_special)
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fatal("maximum identifier length insufficient");
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idf->id_special = si->si_flag;
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si++;
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}
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}
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#ifdef DEBUG
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#ifndef NOPP
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preprocess()
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{
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/* preprocess() is the "stand-alone" preprocessor which
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consecutively calls the lexical analyzer LLlex() to get
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the tokens and prints them in a suitable way.
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*/
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static unsigned int lastlineno = 0;
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static char *lastfilenm = "";
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while (LLlex() != EOI) {
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if (lastlineno != dot.tk_line) {
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if (strcmp(lastfilenm, dot.tk_file) == 0) {
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if (dot.tk_line - lastlineno <= 1) {
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lastlineno++;
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print("\n");
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}
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else {
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lastlineno = dot.tk_line;
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if (!options['P'])
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print("\n#line %ld \"%s\"\n",
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lastlineno,
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lastfilenm
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);
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}
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}
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else {
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lastfilenm = dot.tk_file;
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lastlineno = dot.tk_line;
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if (!options['P'])
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print("\n#line %ld \"%s\"\n",
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lastlineno, lastfilenm);
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}
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}
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else
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if (strcmp(lastfilenm, dot.tk_file) != 0) {
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lastfilenm = dot.tk_file;
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if (!options['P'])
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print("\n#line %ld \"%s\"\n",
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lastlineno, lastfilenm);
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}
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switch (DOT) {
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case IDENTIFIER:
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case TYPE_IDENTIFIER:
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print("%s ", dot.tk_idf->id_text);
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break;
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case STRING:
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{
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char sbuf[1024]; /* a transient buffer */
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char *bts2str();
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print("\"%s\" ", bts2str(dot.tk_bts, dot.tk_len, sbuf));
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break;
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}
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case INTEGER:
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print("%ld ", dot.tk_ival);
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break;
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#ifndef NOFLOAT
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case FLOATING:
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print("%s ", dot.tk_fval);
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break;
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#endif NOFLOAT
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case EOI:
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case EOF:
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return;
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default: /* very expensive... */
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print("%s ", symbol2str(DOT));
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}
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}
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}
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#endif NOPP
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#endif DEBUG
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#ifdef USE_TMP
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AppendFile(src, dst)
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char *src, *dst;
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{
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File *fp_src, *fp_dst;
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char buf[BUFSIZ];
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int n;
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if (sys_open(src, OP_READ, &fp_src) == 0)
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fatal("cannot read %s", src);
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if (dst) {
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if (sys_open(dst, OP_APPEND, &fp_dst) == 0)
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fatal("cannot write to %s", src);
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}
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else
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fp_dst = STDOUT;
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while (sys_read(fp_src, buf, BUFSIZ, &n) != 0 && n > 0)
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if (sys_write(fp_dst, buf, n) == 0)
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fatal("(AppendFile) write error");
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if (n != 0)
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fatal("(AppendFile) read error");
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sys_close(fp_src);
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if (fp_dst != STDOUT)
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sys_close(fp_dst);
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}
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#endif USE_TMP
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