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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
- * 29-Apr-85 MM Make -N work again.
- * 03-Oct-85 CG Change default loc. of <files> for P/OS.
- * 08-Nov-85 ado Prevent wierd -D arguments
- */
-
- #include <stdio.h>
- #include <ctype.h>
- #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;
-
- if ((fp = fopen(filename, "r")) == NULL) {
- #if DEBUG
- perror(filename);
- #endif
- return (FALSE);
- }
- #if DEBUG
- if (debug)
- fprintf(stderr, "Reading from \"%s\"\n", filename);
- #endif
- addfile(fp, filename);
- 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();
-
- 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 */
- }
-
-
-
-
-
-
-
-
- setincdirs()
- /*
- * Append system-specific directories to the include directory list.
- * Called only when cpp is started.
- */
- {
-
- #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_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++ = "LB:[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
-
- #if HOST == SYS_MSDOS
- {
- static char incdir[ 100 ];
- char *getenv();
- char *foo;
-
- foo = getenv( "INCLUDE" );
- if ( foo == NULL )
- strcpy( incdir, "\\include\\" );
- else {
- strncpy( incdir, foo, 99 );
- incdir[ 98 ] = EOS;
- strcat( incdir, "\\" );
- *incend++ = incdir;
- } /* End if */
- } /* End hack */
- #define MAXINCLUDE (NINCLUDE - 1 - IS_INCLUDE)
- #endif
- }
-
-
-
-
-
-
-
-
-
-
-
- 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 */
- char *cp; /* For -D arg test */
-
- 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 */
- /*
- * Check for incorrect argument -- don't allow
- * -Dfoo(bar)=something
- */
- if (type[*ap] != LET)
- cfatal("Argument needed for -D in \"%s\"", arg);
- for (cp = ap; *cp != EOS && *cp != '='; cp++) {
- if (type[*cp] != LET && type[*cp] != DIG)
- cfatal("Incorrect argument for -D in \"%s\"", arg);
- }
- #if HOST != SYS_UNIX && HOST != SYS_MSDOS
- zap_uc(ap); /* Force define to U.C. */
- #endif
- #if OK_TRIGRAPH
- if (tflag)
- trigraph(ap);
- #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 'I': /* Include directory */
- if (incend >= &incdir[MAXINCLUDE])
- cfatal("Too many include directories", NULLST);
- *incend++ = ap;
- break;
-
- case 'N': /* No predefineds */
- /*
- * cpp -n remove "vax" and friends.
- * cpp -n -n remove __LINE__, too.
- */
- nflag++;
- unpredefine();
- break;
-
- case 'P': /* no #line output */
- pflag = TRUE;
- break;
-
- 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;
-
- #if HOST == SYS_MSDOS
- /* Support the selection of different
- ** memory models for the iAPX86 family
- */
- case 'M':
- sizp = size_table; /* Get start of table... */
- switch( *ap )
- {
- /* s, m and l models work with MicroSoft C
- ** Version 3.00 and above.
- **
- ** s, p, d and l work with Lattice C
- ** Version 2.0 and above.
- */
-
- case 's' : /* Small Model... */
- case 'p' : /* Large Code, Small Data... */
- ms_dos_model = *ap;
- while ( sizp -> bits )
- ( sizp++ ) -> psize = 2;
- break;
-
- case 'd' : /* Small code, large data... */
- case 'l' : /* Large model... */
- ms_dos_model = *ap;
- while ( sizp -> bits )
- ( sizp++ ) -> psize = 4;
- break;
-
- case 'm' : /* Large code, small data... */
- ms_dos_model = *ap;
- while ( sizp -> bits != T_FPTR )
- ( sizp++ ) -> psize = 2;
- /* All data pointers are short. */
- sizp -> psize = 4;
- /* Function pointers are long. */
-
- break;
-
- default : /* Invalid model? */
- cwarn("-M, invalid memory model '%c'", *ap);
- } /* End switch */
- break;
- #endif /* "-M" option support */
-
- case 'T':
- if (isdigit(*ap))
- tflag = atoi(ap);
- else {
- tflag = !tflag;
- fprintf(stderr, "Trigraph recognition %sabled\n",
- (tflag) ? "en" : "dis");
- }
- break;
-
- case 'U': /* Undefine symbol */
- #if HOST != SYS_UNIX && HOST != SYS_MSDOS
- zap_uc(ap);
- #endif
- /*
- * We don't need to map trigraphs as they
- * can't be part of a symbol name.
- * (_ isn't trigraphable).
- */
- if (defendel(ap, TRUE) == NULL)
- cwarn("\"%s\" wasn't defined", ap);
- 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\
- -C\t\t\tWrite source file comments to output\n\
- -Dsymbol=value\tDefine a symbol with the given (optional) value\n\
- -Idirectory\t\tAdd a directory to the #include search list\n\
- -N\t\t\tDon't predefine target-specific names\n\
- -P\t\t\tDon't output #line lines\n\
- -Stext\t\tSpecify sizes for #if sizeof\n\
- -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);
- }
- return (j); /* Return new argc */
- }
-
-
-
-
-
-
-
-
-
-
-
-
-
- #if HOST != SYS_UNIX && HOST != SYS_MSDOS
- 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().
- */
- {
- while (*ap != EOS) {
- /*
- * Don't use islower() here so it works with Multinational
- */
- if (*ap >= 'a' && *ap <= 'z')
- *ap = toupper(*ap);
- ap++;
- }
- }
- #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__, and __DATE__ are always present.
- */
- {
- register char **pp;
- register char *tp;
- register DEFBUF *dp;
- int i;
- long tvec;
- extern char *ctime();
-
- /*
- * 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(27);
- dp->nargs = DEF_NOARGS;
- time(&tvec);
- *tp++ = '"';
- strcpy(tp, ctime(&tvec));
- tp[24] = '"'; /* Overwrite newline */
- #endif
- }
- }
-
- FILE_LOCAL
- unpredefine()
- /*
- * Remove predefined symbols from the symbol table.
- * The strange ordering (insert, command-line-scan, remove)
- * is needed to avoid interaction with user-specified -D arguments.
- */
- {
- register char **pp;
-
- for (pp = preset; *pp != NULL; pp++) {
- if (*pp[0] != EOS)
- defendel(*pp, TRUE);
- }
- if (nflag > 1) {
- for (pp = magic; *pp != NULL; pp++)
- defendel(*pp, TRUE);
- #if OK_DATE
- defendel("__DATE__", TRUE);
- #endif
- }
- }
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- #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 */
-
- 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(IO_ERROR); /* 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(IO_ERROR); /* 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(IO_ERROR); /* 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[] */
- return (j); /* Return new argc */
- }
- #endif
-
-
-
-