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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, i;
        FILE *fd;
        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>", NULL, 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 = stdin;
        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 = fopen(fp, "r")) == NULL)
                        error(FATAL, "Can't open input file %s", fp);
        }
        if (optind+1<argc) {
                FILE *fdo = freopen(argv[optind+1], "w", stdout);
                if (fdo == NULL)
                        error(FATAL, "Can't open output file %s", argv[optind+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;
}