unix.c

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#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include "cpp.h"

extern  int getopt(int, char *const *, const char *);
extern  char    *optarg, rcsid[];
extern  int optind;
int verbose;
int Mflag;  /* only print active include files */
char    *objname; /* "src.$O: " */
int Cplusplus = 1;

void
setup(int argc, char **argv)
{
    int c, fd, i;
    char *fp, *dp;
    Tokenrow tr;
    extern void setup_kwtab(void);

    setup_kwtab();
    while ((c = getopt(argc, argv, "MNOVv+I:D:U:F:lg")) != -1)
        switch (c) {
        case 'N':
            for (i=0; i<NINCLUDE; i++)
                if (includelist[i].always==1)
                    includelist[i].deleted = 1;
            break;
        case 'I':
            for (i=NINCLUDE-2; i>=0; i--) {
                if (includelist[i].file==NULL) {
                    includelist[i].always = 1;
                    includelist[i].file = optarg;
                    break;
                }
            }
            if (i<0)
                error(FATAL, "Too many -I directives");
            break;
        case 'D':
        case 'U':
            setsource("<cmdarg>", -1, optarg);
            maketokenrow(3, &tr);
            gettokens(&tr, 1);
            doadefine(&tr, c);
            unsetsource();
            break;
        case 'M':
            Mflag++;
            break;
        case 'v':
            fprintf(stderr, "%s %s\n", argv[0], rcsid);
            break;
        case 'V':
            verbose++;
            break;
        case '+':
            Cplusplus++;
            break;
        default:
            break;
        }
    dp = ".";
    fp = "<stdin>";
    fd = 0;
    if (optind<argc) {
        if ((fp = strrchr(argv[optind], '/')) != NULL) {
            int len = fp - argv[optind];
            dp = (char*)newstring((uchar*)argv[optind], len+1, 0);
            dp[len] = '\0';
        }
        fp = (char*)newstring((uchar*)argv[optind], strlen(argv[optind]), 0);
        if ((fd = open(fp, 0)) <= 0)
            error(FATAL, "Can't open input file %s", fp);
    }
    if (optind+1<argc) {
        int fdo = creat(argv[optind+1], 0666);
        if (fdo<0)
            error(FATAL, "Can't open output file %s", argv[optind+1]);
        dup2(fdo, 1);
    }
    if(Mflag)
        setobjname(fp);
    includelist[NINCLUDE-1].always = 0;
    includelist[NINCLUDE-1].file = dp;
    setsource(fp, fd, NULL);
}



/* memmove is defined here because some vendors don't provide it at
   all and others do a terrible job (like calling malloc) */
void *
memmove(void *dp, const void *sp, size_t n)
{
    unsigned char *cdp, *csp;

    if (n<=0)
        return 0;
    cdp = dp;
    csp = (unsigned char *)sp;
    if (cdp < csp) {
        do {
            *cdp++ = *csp++;
        } while (--n);
    } else {
        cdp += n;
        csp += n;
        do {
            *--cdp = *--csp;
        } while (--n);
    }
    return 0;
}

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