/*  Unix frontend for vbcc      */

#include <stdlib.h>
#include <string.h>
#include <stdio.h>

struct NameList{
    struct NameList *next;
    char *obj;
} *first_obj=0,*last_obj=0,*first_scratch=0,*last_scratch=0;

/*  Limit fuer Laenge der Namen (wegen Wildcards)   */
#define NAMEBUF 1000
#define USERLIBS 1000

/*  Ab dieser Laenge werden Objektfiles nicht direkt uebergeben,    */
/*  sondern aus einem File an den Linker uebergeben                 */
#define MAXCLEN 500

#define OUTPUTSET 1024
#define NOSTDLIB 512
#define VERBOSE 256
#define VERYVERBOSE 128
#define KEEPSCRATCH 64

#define PPSRC 1
#define CCSRC 2
#define ASSRC 3
#define OBJ 4

/*  Namen der einzelnen Phasen  */
char *ppname="vcpp -D__STDC__=1 -D__STRICT_ANSI__ -I/usr/include %s %s %s",
     *ccname="vbcc -quiet -no-preprocessor -gas -no-fp-return -cpu=68020 -fpu=68881",
     *asname="as %s -o %s",
     *ldname="ld -dp /usr/lib/crt0.o %s %s -lc -o %s",
     *l2name="ld -dp %s %s -o %s",
     *rmname="rm %s";
/*  dasselbe fuer VERBOSE   */
char *ppv="vcpp -D__STDC__=1 -D__STRICT_ANSI__ -I/usr/include %s %s %s",
     *ccv="vbcc -gas -no-preprocessor -no-fp-return -cpu=68020 -fpu=68881",
     *asv="as -v %s -o %s",
     *ldv="ld -t -dp /usr/lib/crt0.o %s %s -lc -o %s",
     *l2v="ld -t -dp %s %s -o %s",
     *rmv="rm -i  %s";

const char *config_names[]={"vc.config","/etc/vc.config"};

/*  String fuer die Default libraries   */
char userlibs[USERLIBS];
char *nomem="Not enough memory!\n";

char *destname="a.out";
char namebuf[NAMEBUF+1];

char *config;
char **confp;

int typ(char *);
char *add_suffix(char *,char *);
void raus(int);

char *command,*options,*linkcmd,*objects,*libs,*ppopts;

int linklen=10,flags=0;

void free_namelist(struct NameList *p)
{
    struct NameList *m;
    while(p){
        m=p->next;
        if(flags&VERYVERBOSE){
            puts("free p->obj");
            if(!p->obj) puts("IS ZERO!!"); else puts(p->obj);
        }
        free((void *)p->obj);
        if(flags&VERYVERBOSE){puts("free p"); if(!p) puts("IS ZERO!!");}
        free((void *)p);
        p=m;
    }
}
void del_scratch(struct NameList *p)
{
    while(p){
        sprintf(command,rmname,p->obj);
        if(flags&VERBOSE) printf("%s\n",command);
        if(system(command)){printf("%s failed\n",command);raus(20);}
        p=p->next;
    }
}
void raus(int rc)
{
    if(confp)   free(confp);
    if(config)  free(config);
    if(objects) free(objects);
    if(libs)    free(libs);
    if(command) free(command);
    if(ppopts)  free(ppopts);
    if(options) free(options);
    if(linkcmd) free(linkcmd);
    free_namelist(first_obj);
    free_namelist(first_scratch);
    exit(rc);
}
void add_name(char *obj,struct NameList **first,struct NameList **last)
{
    struct NameList *new;
    if(flags&VERYVERBOSE) printf("add_name: %s\n",obj);
    if(!(new=(struct NameList *)malloc(sizeof(struct NameList))))
        {printf(nomem);raus(20);}
    if(!(new->obj=(char *)malloc(strlen(obj)+1)))
        {free((void *)new);printf(nomem);raus(20);}
    if(first==&first_obj) linklen+=strlen(obj)+1;
    strcpy(new->obj,obj);
    new->next=0;
    if(!*first){
        *first=*last=new;
    }else{
        (*last)->next=new;*last=new;
    }
}
int read_config(void)
{
    int i,count;
    FILE *file=0;
    long size;
    char *configname,*p;
    for(i=0;i<sizeof(config_names)/sizeof(config_names[0]);i++){
        file=fopen(config_names[i],"rb");
        if(file) break;
    }
    if(!file) return(0);
    if(fseek(file,0,SEEK_END)) return(0);
    size=ftell(file);   /*  noch errorcheck */
    if(fseek(file,0,SEEK_SET)) return(0);
    config=malloc(size);
    if(!config){printf(nomem);raus(EXIT_FAILURE);}
    fread(config,1,size,file);
    fclose(file);
    count=0;p=config;
    while(*p&&p<config+size){
        count++;
        while(*p!='\n'&&p<config+size) p++;
        if(*p=='\n') *p++=0;
    }
    confp=malloc(count*sizeof(char *));
    if(!confp){printf(nomem);raus(EXIT_FAILURE);}
    for(p=config,i=0;i<count;i++){
        confp[i]=p;
        while(*p) p++;
        p++;
    }
    return(count);
}

int main(int argc,char *argv[])
{
    int tfl,i,opt=1,len=10,pm,count;char *parm;
    char oldfile[NAMEBUF+2];
    count=read_config();
    for(i=1;i<argc+count;i++){
        if(i<argc) parm=argv[i]; else parm=confp[i-argc];
/*        printf("Parameter %d=%s\n",i,parm);*/
        if(!strncmp(parm,"-pp=",4)){ppname=parm+4;*parm=0;}
        if(!strncmp(parm,"-as=",4)){asname=parm+4;*parm=0;}
        if(!strncmp(parm,"-ld=",4)){ldname=parm+4;*parm=0;}
        if(!strncmp(parm,"-l2=",4)){l2name=parm+4;*parm=0;}
        if(!strncmp(parm,"-rm=",4)){rmname=parm+4;*parm=0;}
        if(!strncmp(parm,"-ppv=",5)){ppv=parm+5;*parm=0;}
        if(!strncmp(parm,"-asv=",5)){asv=parm+5;*parm=0;}
        if(!strncmp(parm,"-ldv=",5)){ldv=parm+5;*parm=0;}
        if(!strncmp(parm,"-l2v=",5)){l2v=parm+5;*parm=0;}
        if(!strncmp(parm,"-rmv=",5)){rmv=parm+5;*parm=0;}
        if(!strcmp(parm,"-E")) {flags|=CCSRC;*parm=0;}
        if(!strcmp(parm,"-S")) {flags|=ASSRC;*parm=0;}
        if(!strcmp(parm,"-c")) {flags|=OBJ;*parm=0;}
        if(!strcmp(parm,"-v")) {flags|=VERBOSE;*parm=0;}
        if(!strcmp(parm,"-k")) {flags|=KEEPSCRATCH;*parm=0;}
        if(!strcmp(parm,"-vv")) {flags|=VERBOSE|VERYVERBOSE;*parm=0;}
        if(!strcmp(parm,"-nostdlib")) {flags|=NOSTDLIB;*parm=0;}
        if(!strncmp(parm,"-O",2)){
            if(parm[2]=='0') opt=0;
            if(parm[2]=='1'||parm[2]==0) opt=991;
            if(parm[2]=='2') opt=1023;
            if(parm[2]>='3') opt=~0;
            if(parm[2]=='=') opt=atoi(&parm[3]);
            *parm=0;
        }
        if(!strcmp(parm,"-o")&&i<argc-1) {
            *argv[i++]=0;destname=argv[i];
            flags|=OUTPUTSET;argv[i]="";continue;
        }
        if(!strncmp(parm,"-o=",3)){
            destname=parm+3;
            flags|=OUTPUTSET;*parm=0;continue;
        }
        if(parm[0]=='-'&&(parm[1]=='l'||parm[1]=='L')){
            if((strlen(userlibs)+strlen(parm)+2)>=USERLIBS){puts("Userlibs too long");exit(20);}
            strcat(userlibs," ");
            strcat(userlibs,parm);
            *parm=0;continue;
        }
        len+=strlen(parm)+10;
    }
    if(flags&VERBOSE) printf("vc frontend for vbcc (c) in 1995-96 by Volker Barthelmann\n");
    if(!(flags&7)) flags|=5;
    tfl=flags&7;
    if(flags&VERYVERBOSE){ppname=ppv;ccname=ccv;asname=asv;ldname=ldv;rmname=rmv;l2name=l2v;}
    if(flags&NOSTDLIB){ldname=l2name;}
    /*  Nummer sicher...    */
    len+=strlen(ppname)+strlen(ccname)+strlen(asname)+strlen(rmname)+strlen(userlibs)+NAMEBUF;
    if(!(command=malloc(len))){printf(nomem);raus(20);}
    if(!(options=malloc(len))){printf(nomem);raus(20);}
    if(!(ppopts=malloc(len))){printf(nomem);raus(20);}
    *options=0;*ppopts=0;
    for(i=1;i<argc+count;i++){
        if(i<argc) parm=argv[i]; else parm=confp[i-argc];
        if(*parm=='-'){
            if(parm[1]!='D'&&parm[1]!='I'&&parm[1]!='+'){
                strcat(options,parm);strcat(options," ");
            }else{
                strcat(ppopts,parm);strcat(ppopts," ");
            }
        }
    }
    if(flags&VERYVERBOSE) printf("flags=%d opt=%d len=%d\n",flags,opt,len);
    namebuf[0]='\"';
    for(i=1;i<argc;i++){
        int t,j;char *file;
        if(i<argc) parm=argv[i]; else parm=confp[i-argc];
        if(*parm=='-'||!*parm) continue;
        if(flags&VERYVERBOSE) printf("Argument %d:%s\n",i,parm);
        do{
            file=parm;
            t=typ(file);
            strcpy(namebuf+1,file);
            strcat(namebuf,"\"");
            file=namebuf;
            if(flags&VERYVERBOSE) printf("File %s=%d\n",file,t);
            for(j=t;j<tfl;j++){
                if(j==OBJ){ if(j==t) add_name(file,&first_obj,&last_obj);
                            continue;}
                strcpy(oldfile,file);
                if(j==PPSRC){
                    file=add_suffix(file,".i");
                    if(tfl==CCSRC&&(flags&OUTPUTSET)) file=destname;
                    sprintf(command,ppname,ppopts,oldfile,file);
                    if((tfl)!=CCSRC) add_name(file,&first_scratch,&last_scratch);
                }
                if(j==CCSRC){
                    file=add_suffix(file,".asm");
                    if(tfl==ASSRC&&(flags&OUTPUTSET)) file=destname;
                    sprintf(command,"%s -O=%-4d %s %s -o= %s",ccname,opt,options,oldfile,file);
                    if((tfl)!=ASSRC) add_name(file,&first_scratch,&last_scratch);
                }
                if(j==ASSRC){
                    file=add_suffix(file,".o");
                    if(tfl==OBJ&&(flags&OUTPUTSET)) file=destname;
                    sprintf(command,asname,oldfile,file);
                    add_name(file,&first_obj,&last_obj);
                    if((tfl)!=OBJ) add_name(file,&first_scratch,&last_scratch);
                }
                if(flags&VERBOSE) printf("%s\n",command);
                if(system(command)){printf("%s failed\n",command);raus(20);}
            }
        }while(0);
    }
    if((tfl)>OBJ){
    /*  Zu Executable linken    */
        struct NameList *p;
        objects=malloc(linklen);
        if(!objects){printf(nomem);raus(EXIT_FAILURE);}
        linklen+=strlen(ldname)+strlen(destname)+strlen(userlibs)+10;
        if(flags&VERYVERBOSE) printf("linklen=%d\n",linklen);
        if(!(linkcmd=(char *)malloc(linklen))){printf(nomem);raus(20);}
        p=first_obj;
        *objects=0;
        while(p){
            if(p->obj){
                strcat(objects,p->obj);strcat(objects," ");
            }
            p=p->next;
        }
        if(*objects){
            sprintf(linkcmd,ldname,objects,userlibs,destname);
            if(flags&VERBOSE) printf("%s\n",linkcmd);
            /*  hier wird objfile bei Fehler nicht geloescht    */
            if(system(linkcmd)){printf("%s failed\n",linkcmd);raus(20);}
        }else puts("No objects to link");
    }
    if(!(flags&KEEPSCRATCH)) del_scratch(first_scratch);
    raus(0);
}

int typ(char *p)
{
    p=strrchr(p,'.');
    if(!p) return(5);
    if(!strcmp(p,".c")) return(PPSRC);
    if(!strcmp(p,".i")) return(CCSRC);
    if(!strcmp(p,".s")) return(ASSRC);
    if(!strcmp(p,".asm")) return(ASSRC);
    if(!strcmp(p,".o")) return(OBJ);
    if(!strcmp(p,".obj")) return(OBJ);
    return(5);
}

char *add_suffix(char *s,char *suffix)
{
    static char str[NAMEBUF+3],*p;
    if(strlen(s)+strlen(suffix)>NAMEBUF){printf("string too long\n");raus(20);}
    if(s!=str) strcpy(str,s);
    p=strrchr(str,'.');
    if(!p) p=str+strlen(s);
    strcpy(p,suffix);
    strcat(p,"\"");
    return(str);
}