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- /*
- * C P P 3 . C
- *
- * File open and command line options
- *
- * Edit history
- * 13-Nov-84 MM Split from cpp1.c
- * 21-Oct-85 rms Make -g command arg not cause an error.
- * 14-Mar-86 FNF Incorporate macro based C debugging package.
- * Port to the Commodore AMIGA.
- * 20-Aug-88 Ois Added __TIME__, and changed __DATE__ to standard.
- */
-
- #include <stdio.h>
- #include <ctype.h>
- #include <time.h> /*OIS*0.92*/
- #include "cppdef.h"
- #include "cpp.h"
- #if DEBUG && (HOST == SYS_VMS || HOST == SYS_UNIX)
- #include <signal.h>
- extern int abort(); /* For debugging */
- #endif
-
- int
- openfile(filename)
- char *filename;
- /*
- * Open a file, add it to the linked list of open files.
- * This is called only from openfile() above.
- */
- {
- register FILE *fp;
- extern FILE *fopen ();
-
- DBUG_ENTER ("openfile");
- if ((fp = fopen(filename, "r")) == NULL) {
- #if DEBUG
- perror(filename);
- #endif
- DBUG_RETURN (FALSE);
- }
- #if DEBUG
- if (debug)
- fprintf(stderr, "Reading from \"%s\"\n", filename);
- #endif
- addfile(fp, filename);
- DBUG_RETURN (TRUE);
- }
-
- addfile(fp, filename)
- FILE *fp; /* Open file pointer */
- char *filename; /* Name of the file */
- /*
- * Initialize tables for this open file. This is called from openfile()
- * above (for #include files), and from the entry to cpp to open the main
- * input file. It calls a common routine, getfile() to build the FILEINFO
- * structure which is used to read characters. (getfile() is also called
- * to setup a macro replacement.)
- */
- {
- register FILEINFO *file;
- extern FILEINFO *getfile();
-
- DBUG_ENTER ("addfile");
- file = getfile(NBUFF, filename);
- file->fp = fp; /* Better remember FILE * */
- file->buffer[0] = EOS; /* Initialize for first read */
- line = 1; /* Working on line 1 now */
- wrongline = TRUE; /* Force out initial #line */
- DBUG_VOID_RETURN;
- }
-
- setincdirs()
- /*
- * Append system-specific directories to the include directory list.
- * Called only when cpp is started.
- */
- {
-
- DBUG_ENTER ("setincdirs");
- #ifdef CPP_INCLUDE
- *incend++ = CPP_INCLUDE;
- #define IS_INCLUDE 1
- #else
- #define IS_INCLUDE 0
- #endif
-
- #if HOST == SYS_UNIX
- *incend++ = "/usr/include";
- #define MAXINCLUDE (NINCLUDE - 1 - IS_INCLUDE)
- #endif
-
- #if HOST == SYS_AMIGADOS
- *incend++ = "df0:include/"; /* These should be fixed. fnf */
- *incend++ = "df1:include/";
- #define MAXINCLUDE (NINCLUDE - 2 - IS_INCLUDE)
- #endif
-
- #if HOST == SYS_VMS
- extern char *getenv();
-
- if (getenv("C$LIBRARY") != NULL)
- *incend++ = "C$LIBRARY:";
- *incend++ = "SYS$LIBRARY:";
- #define MAXINCLUDE (NINCLUDE - 2 - IS_INCLUDE)
- #endif
-
- #if HOST == SYS_RSX
- extern int $$rsts; /* TRUE on RSTS/E */
- extern int $$pos; /* TRUE on PRO-350 P/OS */
- extern int $$vms; /* TRUE on VMS compat. */
-
- if ($$pos) { /* P/OS? */
- *incend++ = "SY:[ZZDECUSC]"; /* C #includes */
- *incend++ = "LB:[1,5]"; /* RSX library */
- }
- else if ($$rsts) { /* RSTS/E? */
- *incend++ = "SY:@"; /* User-defined account */
- *incend++ = "C:"; /* Decus-C library */
- *incend++ = "LB:[1,1]"; /* RSX library */
- }
- else if ($$vms) { /* VMS compatibility? */
- *incend++ = "C:";
- }
- else { /* Plain old RSX/IAS */
- *incend++ = "LB:[1,1]";
- }
- #define MAXINCLUDE (NINCLUDE - 3 - IS_INCLUDE)
- #endif
-
- #if HOST == SYS_RT11
- extern int $$rsts; /* RSTS/E emulation? */
-
- if ($$rsts)
- *incend++ = "SY:@"; /* User-defined account */
- *incend++ = "C:"; /* Decus-C library disk */
- *incend++ = "SY:"; /* System (boot) disk */
- #define MAXINCLUDE (NINCLUDE - 3 - IS_INCLUDE)
- #endif
- DBUG_VOID_RETURN;
- }
-
- int
- dooptions(argc, argv)
- int argc;
- char *argv[];
- /*
- * dooptions is called to process command line arguments (-Detc).
- * It is called only at cpp startup.
- */
- {
- register char *ap;
- register DEFBUF *dp;
- register int c;
- int i, j;
- char *arg;
- SIZES *sizp; /* For -S */
- int size; /* For -S */
- int isdatum; /* FALSE for -S* */
- int endtest; /* For -S */
-
- DBUG_ENTER ("dooptions");
- for (i = j = 1; i < argc; i++) {
- arg = ap = argv[i];
- if (*ap++ != '-' || *ap == EOS)
- argv[j++] = argv[i];
- else {
- c = *ap++; /* Option byte */
- if (islower(c)) /* Normalize case */
- c = toupper(c);
- switch (c) { /* Command character */
- case 'C': /* Keep comments */
- cflag = TRUE;
- keepcomments = TRUE;
- break;
-
- case 'D': /* Define symbol */
- #if HOST != SYS_UNIX && HOST != SYS_AMIGADOS
- zap_uc(ap); /* Force define to U.C. */
- #endif
- /*
- * If the option is just "-Dfoo", make it -Dfoo=1
- */
- while (*ap != EOS && *ap != '=')
- ap++;
- if (*ap == EOS)
- ap = "1";
- else
- *ap++ = EOS;
- /*
- * Now, save the word and its definition.
- */
- dp = defendel(argv[i] + 2, FALSE);
- dp->repl = savestring(ap);
- dp->nargs = DEF_NOARGS;
- break;
-
- case 'E': /* Ignore non-fatal */
- eflag = TRUE; /* errors. */
- break;
-
- case 'G': /* Cmpiler's debug switch */
- break;
-
- case 'I': /* Include directory */
- if (incend >= &incdir[MAXINCLUDE])
- cfatal("Too many include directories", NULLST);
- *incend++ = ap;
- break;
-
- case 'N': /* No predefineds */
- nflag++; /* Repeat to undefine */
- break; /* __LINE__, etc. */
-
- #if OK_SIZEOF
- case 'S':
- sizp = size_table;
- if (isdatum = (*ap != '*')) /* If it's just -S, */
- endtest = T_FPTR; /* Stop here */
- else { /* But if it's -S* */
- ap++; /* Step over '*' */
- endtest = 0; /* Stop at end marker */
- }
- while (sizp->bits != endtest && *ap != EOS) {
- if (!isdigit(*ap)) { /* Skip to next digit */
- ap++;
- continue;
- }
- size = 0; /* Compile the value */
- while (isdigit(*ap)) {
- size *= 10;
- size += (*ap++ - '0');
- }
- if (isdatum)
- sizp->size = size; /* Datum size */
- else
- sizp->psize = size; /* Pointer size */
- sizp++;
- }
- if (sizp->bits != endtest)
- cwarn("-S, too few values specified in %s", argv[i]);
- else if (*ap != EOS)
- cwarn("-S, too many values, \"%s\" unused", ap);
- break;
- #endif /* OK_SIZEOF */
-
- case 'U': /* Undefine symbol */
- #if HOST != SYS_UNIX && HOST != SYS_AMIGADOS
- zap_uc(ap);
- #endif
- if (defendel(ap, TRUE) == NULL)
- cwarn("\"%s\" wasn't defined", ap);
- break;
- case 'W':
- wflag++;
- break;
- #if DEBUG
- case 'X': /* Debug */
- debug = (isdigit(*ap)) ? atoi(ap) : 1;
- #if (HOST == SYS_VMS || HOST == SYS_UNIX)
- signal(SIGINT, abort); /* Trap "interrupt" */
- #endif
- fprintf(stderr, "Debug set to %d\n", debug);
- break;
- #endif
-
- default: /* What is this one? */
- cwarn("Unknown option \"%s\"", arg);
- fprintf(stderr, "The following options are valid:\n");
- fprintf(stderr, " -C\t\t\tWrite source file comments to output\n");
- fprintf(stderr, " -Dsymbol=value");
- fprintf(stderr, "\tDefine a symbol with the given (optional) value\n");
- fprintf(stderr, " -Idirectory");
- fprintf(stderr, "\t\tAdd a directory to the #include search list\n");
- fprintf(stderr, " -N\t\t\tDon't predefine target-specific names\n");
- fprintf(stderr, " -Stext\t\tSpecify sizes for #if sizeof\n");
- fprintf(stderr, " -Usymbol\t\tUndefine symbol\n");
- #if DEBUG
- fprintf(stderr, " -Xvalue\t\tSet internal debug flag\n");
- #endif
- break;
- } /* Switch on all options */
- } /* If it's a -option */
- } /* For all arguments */
- if (j > 3) {
- cerror(
- "Too many file arguments. Usage: cpp [input [output]]",
- NULLST);
- }
- DBUG_RETURN (j); /* Return new argc */
- }
-
- #if HOST != SYS_UNIX && HOST != SYS_AMIGADOS
- FILE_LOCAL
- zap_uc(ap)
- register char *ap;
- /*
- * Dec operating systems mangle upper-lower case in command lines.
- * This routine forces the -D and -U arguments to uppercase.
- * It is called only on cpp startup by dooptions().
- */
- {
- DBUG_ENTER ("zap_uc");
- while (*ap != EOS) {
- /*
- * Don't use islower() here so it works with Multinational
- */
- if (*ap >= 'a' && *ap <= 'z')
- *ap = toupper(*ap);
- ap++;
- }
- DBUG_VOID_RETURN;
- }
- #endif
-
- initdefines()
- /*
- * Initialize the built-in #define's. There are two flavors:
- * #define decus 1 (static definitions)
- * #define __FILE__ ?? (dynamic, evaluated by magic)
- * Called only on cpp startup.
- *
- * Note: the built-in static definitions are supressed by the -N option.
- * __LINE__, __FILE__, __TIME__ and __DATE__ are always present.
- */
- {
- register char **pp;
- register char *tp;
- register DEFBUF *dp;
- register struct tm *tm, *localtime();
- int i;
- long tvec;
-
- static char months[12][4] = {
- "Jan", "Feb", "Mar", "Apr", "May", "Jun",
- "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
- };
-
- DBUG_ENTER ("initdefines");
- DBUG_2 ("defs", "initialize built in defines");
- /*
- * Predefine the built-in symbols. Allow the
- * implementor to pre-define a symbol as "" to
- * eliminate it.
- */
- if (nflag == 0) {
- for (pp = preset; *pp != NULL; pp++) {
- if (*pp[0] != EOS) {
- dp = defendel(*pp, FALSE);
- dp->repl = savestring("1");
- dp->nargs = DEF_NOARGS;
- }
- }
- }
- /*
- * The magic pre-defines (__FILE__ and __LINE__ are
- * initialized with negative argument counts. expand()
- * notices this and calls the appropriate routine.
- * DEF_NOARGS is one greater than the first "magic" definition.
- */
- if (nflag < 2) {
- for (pp = magic, i = DEF_NOARGS; *pp != NULL; pp++) {
- dp = defendel(*pp, FALSE);
- dp->nargs = --i;
- }
- #if OK_DATE
- /*
- * Define __DATE__ as today's date.
- */
- dp = defendel("__DATE__", FALSE);
- dp->repl = tp = getmem(14);
- dp->nargs = DEF_NOARGS;
- time(&tvec);
- tm = localtime(&tvec);
- sprintf(tp, "\"%3s %2d %4d\"", /* "Aug 20 1988" */
- months[tm->tm_mon],
- tm->tm_mday,
- tm->tm_year + 1900);
-
- /*
- * Define __TIME__ as this moment's time.
- */
- dp = defendel("__TIME__", FALSE);
- dp->repl = tp = getmem(11);
- dp->nargs = DEF_NOARGS;
- sprintf(tp, "\"%2d:%02d:%02d\"", /* "20:42:31" */
- tm->tm_hour,
- tm->tm_min,
- tm->tm_sec);
- #endif
- }
- DBUG_VOID_RETURN;
- }
-
- deldefines()
- /*
- * Delete the built-in #define's.
- */
- {
- register char **pp;
- int i;
-
-
- DBUG_ENTER ("deldefines");
- DBUG_2 ("deldefs", "delete built in defines");
- /*
- * Delete the built-in symbols, unless -WW.
- */
- if (wflag < 2) {
- for (pp = preset; *pp != NULL; pp++) {
- defendel(*pp, TRUE);
- }
- }
- /*
- * The magic pre-defines __FILE__ and __LINE__
- */
- for (pp = magic, i = DEF_NOARGS; *pp != NULL; pp++) {
- defendel(*pp, TRUE);
- }
- #if OK_DATE
- /*
- * Undefine __DATE__.
- */
- defendel("__DATE__", TRUE);
-
- /*
- * Undefine __TIME__.
- */
- defendel("__TIME__", TRUE);
- #endif
- DBUG_VOID_RETURN;
- }
-
- #if HOST == SYS_VMS
- /*
- * getredirection() is intended to aid in porting C programs
- * to VMS (Vax-11 C) which does not support '>' and '<'
- * I/O redirection. With suitable modification, it may
- * useful for other portability problems as well.
- */
-
- int
- getredirection(argc, argv)
- int argc;
- char **argv;
- /*
- * Process vms redirection arg's. Exit if any error is seen.
- * If getredirection() processes an argument, it is erased
- * from the vector. getredirection() returns a new argc value.
- *
- * Warning: do not try to simplify the code for vms. The code
- * presupposes that getredirection() is called before any data is
- * read from stdin or written to stdout.
- *
- * Normal usage is as follows:
- *
- * main(argc, argv)
- * int argc;
- * char *argv[];
- * {
- * argc = getredirection(argc, argv);
- * }
- */
- {
- register char *ap; /* Argument pointer */
- int i; /* argv[] index */
- int j; /* Output index */
- int file; /* File_descriptor */
- extern int errno; /* Last vms i/o error */
-
- DBUG_ENTER ("getredirection");
- for (j = i = 1; i < argc; i++) { /* Do all arguments */
- switch (*(ap = argv[i])) {
- case '<': /* <file */
- if (freopen(++ap, "r", stdin) == NULL) {
- perror(ap); /* Can't find file */
- exit(errno); /* Is a fatal error */
- }
- break;
-
- case '>': /* >file or >>file */
- if (*++ap == '>') { /* >>file */
- /*
- * If the file exists, and is writable by us,
- * call freopen to append to the file (using the
- * file's current attributes). Otherwise, create
- * a new file with "vanilla" attributes as if the
- * argument was given as ">filename".
- * access(name, 2) returns zero if we can write on
- * the specified file.
- */
- if (access(++ap, 2) == 0) {
- if (freopen(ap, "a", stdout) != NULL)
- break; /* Exit case statement */
- perror(ap); /* Error, can't append */
- exit(errno); /* After access test */
- } /* If file accessable */
- }
- /*
- * On vms, we want to create the file using "standard"
- * record attributes. creat(...) creates the file
- * using the caller's default protection mask and
- * "variable length, implied carriage return"
- * attributes. dup2() associates the file with stdout.
- */
- if ((file = creat(ap, 0, "rat=cr", "rfm=var")) == -1
- || dup2(file, fileno(stdout)) == -1) {
- perror(ap); /* Can't create file */
- exit(errno); /* is a fatal error */
- } /* If '>' creation */
- break; /* Exit case test */
-
- default:
- argv[j++] = ap; /* Not a redirector */
- break; /* Exit case test */
- }
- } /* For all arguments */
- argv[j] = NULL; /* Terminate argv[] */
- DBUG_RETURN (j); /* Return new argc */
- }
- #endif
-
-
-