don't choke on zero intervals

[unix-history] / usr / src / usr.sbin / config / mkmakefile.c

/*
* mkmakefile.c 1.16    82/07/21
*      Functions in this file build the makefile from the files list
*      and the information in the config table
*/

#include <stdio.h>
#include <ctype.h>
#include "y.tab.h"
#include "config.h"

#define next_word(fp, wd)\
   { register char *word = get_word(fp);\
       if (word == EOF) return EOF; \
       else wd = word; }

static struct file_list *fcur;

/*
* fl_lookup
*      look up a file name
*/

struct file_list *fl_lookup(file)
register char *file;
{
   register struct file_list *fp;

   for (fp = ftab ; fp != NULL; fp = fp->f_next)
   {
       if (eq(fp->f_fn, file))
           return fp;
   }
   return NULL;
}

/*
* new_fent
*      Make a new file list entry
*/

struct file_list *new_fent()
{
   register struct file_list *fp;

   fp = (struct file_list *) malloc(sizeof *fp);
   fp->f_needs = fp->f_next = NULL;
   if (fcur == NULL)
       fcur = ftab = fp;
   else
       fcur->f_next = fp;
   fcur = fp;
   return fp;
}

/*
* makefile:
*      Build the makefile from the skeleton
*/

makefile()
{
   FILE *ifp, *ofp;
   char line[BUFSIZ];
   struct cputype *cp;
   struct opt *op;

   read_files();                       /* Read in the "files" file */
   ifp = fopen("../conf/makefile", "r");
   if (ifp == NULL) {
       perror("../conf/makefile");
       exit(1);
   }
   ofp = fopen(path("makefile"), "w");
   if (ofp == NULL) {
       perror(path("makefile"));
       exit(1);
   }
   fprintf(ofp, "IDENT=-D%s", raise(ident));
   if (cputype == NULL) {
       printf("cpu type must be specified\n");
       exit(1);
   }
   for (cp = cputype; cp; cp = cp->cpu_next)
       fprintf(ofp, " -D%s", cp->cpu_name);
   for (op = opt; op; op = op->op_next)
         if (op->op_value)
               fprintf(ofp, " -D%s=\"%s\"", op->op_name, op->op_value);
         else
               fprintf(ofp, " -D%s", op->op_name);
   fprintf(ofp, "\n");
   if (hz == 0) {
#ifdef notdef
       printf("hz not specified; 50hz assumed\n");
#endif
       hz = 60;
   }
   if (hadtz == 0)
       printf("timezone not specified; gmt assumed\n");
   if (maxusers == 0) {
       printf("maxusers not specified; 24 assumed\n");
       maxusers = 24;
   } else if (maxusers < 8) {
       printf("minimum of 8 maxusers assumed\n");
       maxusers = 8;
   } else if (maxusers > 128) {
       printf("maxusers truncated to 128\n");
       maxusers = 128;
   }
   fprintf(ofp, "PARAM=-DHZ=%d -DTIMEZONE=%d -DDST=%d -DMAXUSERS=%d\n",
       hz, timezone, dst, maxusers);
   while(fgets(line, BUFSIZ, ifp) != NULL)
   {
       if (*line != '%')
       {
           fprintf(ofp, "%s", line);
           continue;
       }
       else if (eq(line, "%OBJS\n"))
           do_objs(ofp);
       else if (eq(line, "%CFILES\n"))
           do_cfiles(ofp);
       else if (eq(line, "%RULES\n"))
           do_rules(ofp);
       else if (eq(line, "%LOAD\n"))
           do_load(ofp);
       else
           fprintf(stderr, "Unknown %% construct in generic makefile: %s", line);
   }
   fclose(ifp);
   fclose(ofp);
}

/*
* files:
*      Read in the "files" file.
*      Store it in the ftab linked list
*/

read_files()
{
   FILE *fp;
   register struct file_list *tp;
   register struct device *dp;
   register char *wd, *this;
   int type, nreqs, dev;

   fp = fopen("../conf/files", "r");
   if (fp == NULL) {
       perror("../conf/files");
       exit(1);
   }
   ftab = NULL;
   while((wd = get_word(fp)) != EOF)
   {
       if (wd == NULL)
           continue;
       this = ns(wd);
       /*
        * Read standard/optional
        */
       next_word(fp, wd);
       if (wd == NULL)
       {
           fprintf(stderr, "Huh, no type for %s in files.\n", this);
           exit(10);
       }
       if ((tp = fl_lookup(wd)) == NULL)
           tp = new_fent();
       else
           free(tp->f_fn);
       tp->f_fn = this;
       nreqs = dev = type = 0;
       if (eq(wd, "optional"))
       {
           for (;;) 
           {
               next_word(fp, wd);
               if (wd == NULL || (dev = eq(wd, "device-driver")))
               {
                   if (nreqs == 0)
                   {
                       fprintf(stderr, "Needed a dev for optional(%s)\n",
                               this);
                       exit(11);
                   }
                   else
                       break;
               }
               nreqs++;
               if (tp->f_needs == NULL)
                       tp->f_needs = ns(wd);
               for (dp = dtab ; dp != NULL; dp = dp->d_next)
               {
                   if (eq(dp->d_name, wd))
                       break;
               }
               if (dp == NULL)
               {
                   type = INVISIBLE;
                   while ((wd = get_word(fp)) != NULL)
                       ;
                   break;
               }
           }
       }
       if (dev == 0 && wd != NULL)
       {
           next_word(fp, wd);
           dev = (wd != NULL && eq(wd, "device-driver"));
       }
       if (type == 0)
           type = dev ? DEVICE : NORMAL;
       tp->f_type = type;
   }
   fclose(fp);
}

/*
* do_objs
*      Spew forth the OBJS definition
*/

do_objs(fp)
FILE *fp;
{
   register struct file_list *tp;
   register int lpos, len;
   register char *cp, och, *sp;
   char *tail();

   fprintf(fp, "OBJS=");
   lpos = 6;
   for (tp = ftab; tp != NULL; tp = tp->f_next)
   {
       if (tp->f_type == INVISIBLE)
           continue;
       sp = tail(tp->f_fn);
       cp = sp + (len = strlen(sp)) - 1;
       och = *cp;
       *cp = 'o';
       if (len + lpos > 72)
       {
           lpos = 8;
           fprintf(fp, "\\\n\t");
       }
       fprintf(fp, "%s ", sp);
       lpos += len + 1;
       *cp = och;
   }
   if (lpos != 8)
       putc('\n', fp);
}

/*
* do_cfiles
*      Spew forth the CFILES definition
*/

do_cfiles(fp)
FILE *fp;
{
   register struct file_list *tp;
   register int lpos, len;

   fprintf(fp, "CFILES=");
   lpos = 8;
   for (tp = ftab; tp != NULL; tp = tp->f_next)
   {
       if (tp->f_type == INVISIBLE)
           continue;
       if (tp->f_fn[strlen(tp->f_fn)-1] != 'c')
           continue;
       if ((len = 3 + strlen(tp->f_fn)) + lpos > 72)
       {
           lpos = 8;
           fprintf(fp, "\\\n\t");
       }
       fprintf(fp, "../%s ", tp->f_fn);
       lpos += len + 1;
   }
   if (lpos != 8)
       putc('\n', fp);
}

/*
* tail:
*      Return tail end of a filename
*/

char *tail(fn)
char *fn;
{
   register char *cp;

   cp = rindex(fn, '/');
   return cp+1;
}

/*
* do_rules:
*      Spit out the rules for making each file
*/

do_rules(f)
FILE *f;
{
   register char *cp, *np, och, *tp;
   register struct file_list *ftp;

   for (ftp = ftab; ftp != NULL; ftp = ftp->f_next)
   {
       if (ftp->f_type == INVISIBLE)
           continue;
       cp = (np = ftp->f_fn) + strlen(ftp->f_fn) - 1;
       och = *cp;
       *cp = '\0';
       fprintf(f, "%so: ../%s%c\n", tail(np), np, och);
       tp = tail(np);
       if (och == 's')
           fprintf(f, "\t${AS} -o %so ../%ss\n\n", tp, np);
       else if (ftp->f_type == NORMAL)
       {
           fprintf(f, "\t${CC} -I. -c -S ${COPTS} ../%sc\n", np);
           fprintf(f, "\t${C2} %ss | sed -f ../conf/asm.sed | ${AS} -o %so\n",
                   tp, tp);
           fprintf(f, "\trm -f %ss\n\n", tp);
       }
       else if (ftp->f_type == DEVICE)
       {
           fprintf(f, "\t${CC} -I. -c -S ${COPTS} ../%sc\n", np);
           fprintf(f,"\t${C2} -i %ss | sed -f ../conf/asm.sed | ${AS} -o %so\n",
                   tp, tp);
           fprintf(f, "\trm -f %ss\n\n", tp);
       }
       else
           fprintf(stderr, "Don't know rules for %s", np);
       *cp = och;
   }
}

/*
* Create the load strings
*/

do_load(f)
register FILE *f;
{
   register struct file_list *fl;
   register bool first = TRUE;

   for (fl = conf_list; fl != NULL; fl = fl->f_next)
   {
       fprintf(f, "%s: makefile locore.o ${OBJS} ioconf.o param.o swap%s.o\n",
               fl->f_needs, fl->f_fn);
       fprintf(f, "\t@echo loading %s\n\t@rm -f %s\n",
               fl->f_needs, fl->f_needs);
       if (first)
       {
               first = FALSE;
               fprintf(f, "\t@sh ../conf/newvers.sh\n");
               fprintf(f, "\t@cc $(CFLAGS) -c vers.c\n");
       }
       fprintf(f,
           "\t@ld -n -o %s -e start -x -T 80000000 locore.o ${OBJS} vers.o ioconf.o param.o swap%s.o\n",
           fl->f_needs, fl->f_fn);
       fprintf(f, "\t@echo rearranging symbols\n");
       fprintf(f, "\t@-symorder ../conf/symbols.sort %s\n", fl->f_needs);
       fprintf(f, "\t@size %s\n", fl->f_needs);
       fprintf(f, "\t@chmod 755 %s\n\n", fl->f_needs);
   }
   for (fl = conf_list; fl != NULL; fl = fl->f_next)
   {
       fprintf(f, "swap%s.o: ../dev/swap%s.c\n", fl->f_fn, fl->f_fn);
       fprintf(f, "\t${CC} -I. -c -S ${COPTS} ../dev/swap%s.c\n", fl->f_fn);
       fprintf(f,
           "\t${C2} swap%s.s | sed -f ../conf/asm.sed | ${AS} -o swap%s.o\n",
           fl->f_fn, fl->f_fn);
       fprintf(f, "\trm -f swap%s.s\n\n", fl->f_fn);
   }
   fprintf(f, "all:");
   for (fl = conf_list; fl != NULL; fl = fl->f_next)
       fprintf(f, " %s", fl->f_needs);
   putc('\n', f);
}

raise(str)
register char *str;
{
   register char *cp = str;

   while(*str)
   {
       if (islower(*str))
           *str = toupper(*str);
       str++;
   }
   return cp;
}