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#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

#include <sys/types.h>

#include <sys/wait.h>

/*

 *      A simple filter for the templates

 */

int main(int argc, char *argv[])

{

        char buf[1024];

        char *vec[8192];

        char *fvec[200];

        char **svec;

        char type[64];

        int i;

        int vp=2;

        int ret=0;

        pid_t pid;

        if(chdir(getenv("TOPDIR")))

        {

                perror("chdir");

                exit(1);

        }

        /*

         *      Build the exec array ahead of time.

         */

        vec[0]="kernel-doc";

        vec[1]="-docbook";

        for(i=1;vp<8189;i++)

        {

                if(argv[i]==NULL)

                        break;

                vec[vp++]=type;

                vec[vp++]=argv[i];

        }

        vec[vp++]=buf+2;

        vec[vp++]=NULL;

        /*

         *      Now process the template

         */

        while(fgets(buf, 1024, stdin))

        {

                if(*buf!='!') {

                        printf("%s", buf);

                        continue;

                }

                fflush(stdout);

                svec = vec;

                if(buf[1]=='E')

                        strcpy(type, "-function");

                else if(buf[1]=='I')

                        strcpy(type, "-nofunction");

                else if(buf[1]=='F') {

                        int snarf = 0;

                        fvec[0] = "kernel-doc";

                        fvec[1] = "-docbook";

                        strcpy (type, "-function");

                        vp = 2;

                        for (i = 2; buf[i]; i++) {

                                if (buf[i] == ' ' || buf[i] == '\n') {

                                        buf[i] = '\0';

                                        snarf = 1;

                                        continue;

                                }

                                if (snarf) {

                                        snarf = 0;

                                        fvec[vp++] = type;

                                        fvec[vp++] = &buf[i];

                                }

                        }

                        fvec[vp++] = &buf[2];

                        fvec[vp] = NULL;

                        svec = fvec;

                } else

                {

                        fprintf(stderr, "Unknown ! escape.\n");

                        exit(1);

                }

                switch(pid=fork())

                {

                case -1:

                        perror("fork");

                        exit(1);

                case  0:

                        execvp("scripts/kernel-doc", svec);

                        perror("exec scripts/kernel-doc");

                        exit(1);

                default:

                        waitpid(pid, &ret ,0);

                }

        }

        exit(ret);

}