/* $XConsortium: main.c /main/84 1996/12/04 10:11:23 swick $ */
/*

Copyright (c) 1993, 1994  X Consortium

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of the X Consortium shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from the X Consortium.

*/

#include "def.h"

#ifdef hpux
#define sigvec sigvector
#endif /* hpux */

#ifdef X_POSIX_C_SOURCE
#define _POSIX_C_SOURCE X_POSIX_C_SOURCE
#include <signal.h>
#undef _POSIX_C_SOURCE
#else
#if defined(X_NOT_POSIX) || defined(_POSIX_SOURCE)
#include <signal.h>
#else
#define _POSIX_SOURCE
#include <signal.h>
#undef _POSIX_SOURCE
#endif
#endif

#if NeedVarargsPrototypes
#include <stdarg.h>
#endif

#ifdef DEBUG
int   _debugmask;
#endif

char *ProgramName;

char   *directives[] = {
   "if",
   "ifdef",
   "ifndef",
   "else",
   "endif",
   "define",
   "undef",
   "include",
   "line",
   "pragma",
   "error",
   "ident",
   "sccs",
   "elif",
   "eject",
   NULL
};

#if 0
#define MAKEDEPEND
#include "imakemdep.h"   /* from config sources */
#undef MAKEDEPEND
#endif

struct   inclist inclist[ MAXFILES ],
      *inclistp = inclist,
      maininclist;

FILE *error_out;

char   *filelist[ MAXFILES ];
char   *includedirs[ MAXDIRS + 1 ];
char   *notdotdot[ MAXDIRS ];
char   *objprefix = "";
char   *objsuffix = OBJSUFFIX;
char   *startat = "# DO NOT DELETE";
int   width = 78;
boolean   append = FALSE;
boolean   printed = FALSE;
boolean   verbose = FALSE;
boolean   show_where_not = FALSE;
boolean  warn_multiple = FALSE;   /* Warn on multiple includes of same file */
boolean  strip_path = FALSE; /* strip path from object file name */
boolean  local_include = FALSE; /* add only "" include files */

#ifdef __STDC__
int main(int argc, char **argv);
void redirect(char *line, char *makefile);
#if 0
#ifdef SIGNALRETURNSINT
static int catch(int sig);
#else
static void catch(int sig);
#endif
#endif
#else
int main();
void redirect();
#ifdef SIGNALRETURNSINT
static int catch();
#else
static void catch();
#endif
#endif


#if 0
static
#ifdef SIGNALRETURNSINT
int
#else
void
#endif
catch (sig)
   int sig;
{
   fflush (stdout);
   fatalerr ("got signal %d\n", sig);
}
#endif

#if defined(USG) || (defined(i386) && defined(SYSV)) || defined(WIN32)
#define USGISH
#endif

#ifndef USGISH
#ifndef _POSIX_SOURCE
#define sigaction sigvec
#define sa_handler sv_handler
#define sa_mask sv_mask
#define sa_flags sv_flags
#endif
#if 0
struct sigaction sig_act;
#endif
#endif /* USGISH */

int main(argc, argv)
   int   argc;
   char   **argv;
{
   register char   **fp = filelist;
   register char   **incp = includedirs;
   register char   *p;
   register struct inclist   *ip;
   char   *makefile = NULL;
   struct filepointer   *filecontent;
   struct symtab *psymp = NULL /* predefs */;
   char *endmarker = NULL;
   char *defincdir = NULL;

   error_out = stderr; 
   ProgramName = argv[0];

   while (psymp && psymp->s_name)
   {
       define2(psymp->s_name, psymp->s_value, &maininclist);
       psymp++;
   }
   if (argc == 2 && argv[1][0] == '@') {
       struct stat ast;
       int afd;
       char *args;
       char **nargv;
       int nargc;
       char quotechar = '\0';

       nargc = 1;
       if ((afd = open(argv[1]+1, O_RDONLY)) < 0)
      fatalerr("cannot open \"%s\"\n", argv[1]+1);
       fstat(afd, &ast);
       args = (char *)malloc(ast.st_size + 1);
       if ((ast.st_size = read(afd, args, ast.st_size)) < 0)
      fatalerr("failed to read %s\n", argv[1]+1);
       args[ast.st_size] = '\0';
       close(afd);
       for (p = args; *p; p++) {
      if (quotechar) {
          if (quotechar == '\\' ||
         (*p == quotechar && p[-1] != '\\'))
         quotechar = '\0';
          continue;
      }
      switch (*p) {
      case '\\':
      case '"':
      case '\'':
          quotechar = *p;
          break;
      case ' ':
      case '\n':
          *p = '\0';
          if (p > args && p[-1])
         nargc++;
          break;
      }
       }
       if (p[-1])
      nargc++;
       nargv = (char **)malloc(nargc * sizeof(char *));
       nargv[0] = argv[0];
       argc = 1;
       for (p = args; argc < nargc; p += strlen(p) + 1)
      if (*p) nargv[argc++] = p;
       argv = nargv;
   }
   for(argc--, argv++; argc; argc--, argv++) {
          /* if looking for endmarker then check before parsing */
      if (endmarker && strcmp (endmarker, *argv) == 0) {
          endmarker = NULL;
          continue;
      }
      if (**argv != '-') {
         /* treat +thing as an option for C++ */
         if (endmarker && **argv == '+')
            continue;
         *fp++ = argv[0];
         continue;
      }
      switch(argv[0][1]) {
      case '-':
         endmarker = &argv[0][2];
         if (endmarker[0] == '\0') endmarker = "--";
         break;
      case 'D':
         if (argv[0][2] == '\0') {
            argv++;
            argc--;
         }
         for (p=argv[0] + 2; *p ; p++)
            if (*p == '=') {
               *p = ' ';
               break;
            }
         define(argv[0] + 2, &maininclist);
         break;
      case 'I':
         if (incp >= includedirs + MAXDIRS)
             fatalerr("Too many -I flags.\n");
         *incp++ = argv[0]+2;
         if (**(incp-1) == '\0') {
            *(incp-1) = *(++argv);
            argc--;
         }
         break;
      case 'Y':
         defincdir = argv[0]+2;
         break;
      /* do not use if endmarker processing */
      case 'a':
         if (endmarker) break;
         append = TRUE;
         break;
      case 'l':
         local_include = TRUE;
         break;
      case 'w':
         if (endmarker) break;
         if (argv[0][2] == '\0') {
            argv++;
            argc--;
            width = atoi(argv[0]);
         } else
            width = atoi(argv[0]+2);
         break;
      case 'o':
         if (endmarker) break;
         if (argv[0][2] == '\0') {
            argv++;
            argc--;
            objsuffix = argv[0];
         } else
            objsuffix = argv[0]+2;
         break;
      case 'p':
         if (endmarker) break;
         if (argv[0][2] == '\0') {
            argv++;
            argc--;
            objprefix = argv[0];
         } else
            objprefix = argv[0]+2;
         break;
      case 'v':
         if (endmarker) break;
         verbose = TRUE;
#ifdef DEBUG
         if (argv[0][2])
            _debugmask = atoi(argv[0]+2);
#endif
         break;
#if 0
      case 's':
         if (endmarker) break;
         startat = argv[0]+2;
         if (*startat == '\0') {
            startat = *(++argv);
            argc--;
         }
         if (*startat != '#')
            fatalerr("-s flag's value should start with '#'.\n");
         break;
#endif
      case 'f':
         if (endmarker) break;
         makefile = argv[0]+2;
         if (*makefile == '\0') {
            makefile = *(++argv);
            argc--;
         }
         break;

      case 'm':
         warn_multiple = TRUE;
         break;
      
      case 'S':
         strip_path = TRUE;
         break;

      case 'q':
         error_out = fopen("/dev/null", "w");
         break;
         
      /* Ignore -O, -g so we can just pass ${CFLAGS} to
         makedepend
       */
      case 'O':
      case 'g':
         break;
      default:
         if (endmarker) break;
   /*      fatalerr("unknown opt = %s\n", argv[0]); */
/*          warning("ignoring option %s\n", argv[0]); */
      }
   }
   if (!defincdir) {
#ifdef PREINCDIR
       if (incp >= includedirs + MAXDIRS)
      fatalerr("Too many -I flags.\n");
       *incp++ = PREINCDIR;
#endif
       if (incp >= includedirs + MAXDIRS)
      fatalerr("Too many -I flags.\n");
       *incp++ = INCLUDEDIR;
#ifdef POSTINCDIR
       if (incp >= includedirs + MAXDIRS)
      fatalerr("Too many -I flags.\n");
       *incp++ = POSTINCDIR;
#endif
   } else if (*defincdir) {
       if (incp >= includedirs + MAXDIRS)
      fatalerr("Too many -I flags.\n");
       *incp++ = defincdir;
   }

   redirect(startat, makefile);

#if 0
   /*
    * catch signals.
    */
#ifdef USGISH
/*  should really reset SIGINT to SIG_IGN if it was.  */
#ifdef SIGHUP
   signal (SIGHUP, catch);
#endif
   signal (SIGINT, catch);
#ifdef SIGQUIT
   signal (SIGQUIT, catch);
#endif
   signal (SIGILL, catch);
#ifdef SIGBUS
   signal (SIGBUS, catch);
#endif
   signal (SIGSEGV, catch);
#ifdef SIGSYS
   signal (SIGSYS, catch);
#endif
#else
   sig_act.sa_handler = catch;
#ifdef _POSIX_SOURCE
   sigemptyset(&sig_act.sa_mask);
   sigaddset(&sig_act.sa_mask, SIGINT);
   sigaddset(&sig_act.sa_mask, SIGQUIT);
#ifdef SIGBUS
   sigaddset(&sig_act.sa_mask, SIGBUS);
#endif
   sigaddset(&sig_act.sa_mask, SIGILL);
   sigaddset(&sig_act.sa_mask, SIGSEGV);
   sigaddset(&sig_act.sa_mask, SIGHUP);
   sigaddset(&sig_act.sa_mask, SIGPIPE);
#ifdef SIGSYS
   sigaddset(&sig_act.sa_mask, SIGSYS);
#endif
#else
   sig_act.sa_mask = ((1<<(SIGINT -1))
            |(1<<(SIGQUIT-1))
#ifdef SIGBUS
            |(1<<(SIGBUS-1))
#endif
            |(1<<(SIGILL-1))
            |(1<<(SIGSEGV-1))
            |(1<<(SIGHUP-1))
            |(1<<(SIGPIPE-1))
#ifdef SIGSYS
            |(1<<(SIGSYS-1))
#endif
            );
#endif /* _POSIX_SOURCE */
   sig_act.sa_flags = 0;
   sigaction(SIGHUP, &sig_act, (struct sigaction *)0);
   sigaction(SIGINT, &sig_act, (struct sigaction *)0);
   sigaction(SIGQUIT, &sig_act, (struct sigaction *)0);
   sigaction(SIGILL, &sig_act, (struct sigaction *)0);
#ifdef SIGBUS
   sigaction(SIGBUS, &sig_act, (struct sigaction *)0);
#endif
   sigaction(SIGSEGV, &sig_act, (struct sigaction *)0);
#ifdef SIGSYS
   sigaction(SIGSYS, &sig_act, (struct sigaction *)0);
#endif
#endif /* USGISH */

#endif
   /*
    * now peruse through the list of files.
    */
   for(fp=filelist; *fp; fp++) {
      filecontent = getfile(*fp);
      ip = newinclude(*fp, (char *)NULL);

      find_includes(filecontent, ip, ip, 0, FALSE);
      freefile(filecontent);
      recursive_pr_include(ip, ip->i_file, base_name(*fp, strip_path));
      inc_clean();
   }
   if (printed)
      printf("\n");
   exit(0);
   return 0;
}

struct filepointer *getfile(file)
   char   *file;
{
   register int   fd;
   struct filepointer   *content;
   struct stat   st;

   content = (struct filepointer *)malloc(sizeof(struct filepointer));
   if ((fd = open(file, O_RDONLY)) < 0) {
      warning("cannot open \"%s\"\n", file ? file : "None");
      content->f_p = content->f_base = content->f_end = (char *)malloc(1);
      *content->f_p = '\0';
      return(content);
   }
   fstat(fd, &st);
   content->f_base = (char *)malloc(st.st_size+1);
   if (content->f_base == NULL)
      fatalerr("cannot allocate mem\n");
   if ((st.st_size = read(fd, content->f_base, st.st_size)) < 0)
      fatalerr("failed to read %s\n", file);
   close(fd);
   content->f_len = st.st_size+1;
   content->f_p = content->f_base;
   content->f_end = content->f_base + st.st_size;
   *content->f_end = '\0';
   content->f_line = 0;
   return(content);
}

void
freefile(fp)
   struct filepointer   *fp;
{
   free(fp->f_base);
   free(fp);
}

char *copy(str)
   register char   *str;
{
   register char   *p = (char *)malloc(strlen(str) + 1);

   strcpy(p, str);
   return(p);
}

/*
 * Get the next line.  We only return lines beginning with '#' since that
 * is all this program is ever interested in.
 */
char *getline(filep)
   register struct filepointer   *filep;
{
   register char   *p,   /* walking pointer */
         *eof,   /* end of file pointer */
         *bol;   /* beginning of line pointer */
   register int   lineno;   /* line number */

   p = filep->f_p;
   eof = filep->f_end;
   if (p >= eof)
      return((char *)NULL);
   lineno = filep->f_line;

   for(bol = p--; ++p < eof; ) {
      if (*p == '/' && *(p+1) == '*') { /* consume comments */
         *p++ = ' ', *p++ = ' ';
         while (*p) {
            if (*p == '*' && *(p+1) == '/') {
               *p++ = ' ', *p = ' ';
               break;
            }
            else if (*p == '\n')
               lineno++;
            *p++ = ' ';
         }
         continue;
      }
#ifdef WIN32
      else if (*p == '/' && *(p+1) == '/') { /* consume comments */
         *p++ = ' ', *p++ = ' ';
         while (*p && *p != '\n')
            *p++ = ' ';
         lineno++;
         continue;
      }
#endif
      else if (*p == '\\') {
         if (*(p+1) == '\n') {
            *p = ' ';
            *(p+1) = ' ';
            lineno++;
         }
      }
      else if (*p == '\n') {
         lineno++;
         if (*bol == '#') {
            register char *cp;

            *p++ = '\0';
            /* punt lines with just # (yacc generated) */
            for (cp = bol+1; 
                 *cp && (*cp == ' ' || *cp == '\t'); cp++);
            if (*cp) goto done;
         }
         bol = p+1;
      }
   }
   if (*bol != '#')
      bol = NULL;
done:
   filep->f_p = p;
   filep->f_line = lineno;
   return(bol);
}

/*
 * Strip the file name down to what we want to see in the Makefile.
 * It will have objprefix and objsuffix around it.
 */
char *base_name(file, strip)
   register char   *file;
   int strip;
{
   register char   *p;
   char *fp;

   if (strip) {
      fp = strrchr(file, '/');
      file = copy(fp?fp+1:file);
   }
   else
      file = copy(file);
   for(p=file+strlen(file); p>file && *p != '.'; p--) ;

   if (*p == '.')
      *p = '\0';
   return(file);
}

#if defined(USG) && !defined(CRAY) && !defined(SVR4)
int rename (from, to)
    char *from, *to;
{
    (void) unlink (to);
    if (link(from, to) == 0) {
   unlink (from);
   return 0;
    } else {
   return -1;
    }
}
#endif /* USGISH */

void
redirect(line, makefile)
char *line;
char *makefile;
{
   struct stat   st;
   FILE   *fdin, *fdout;
   char   backup[ BUFSIZ ], buf[ BUFSIZ ];
   boolean   found = FALSE;
   int   len;

   /*
    * if makefile is "-" then let it pour onto stdout.
    */
   if (makefile && *makefile == '-' && *(makefile+1) == '\0') {
      puts(line);
      return;
   }

   /*
    * use a default makefile is not specified.
    */
   if (!makefile) {
      if (stat("Makefile", &st) == 0)
         makefile = "Makefile";
      else if (stat("makefile", &st) == 0)
         makefile = "makefile";
      else
         fatalerr("[mM]akefile is not present\n");
   }
   else
       stat(makefile, &st);
   if ((fdin = fopen(makefile, "r")) == NULL)
      fatalerr("cannot open \"%s\"\n", makefile);

   sprintf(backup, "%s.bak", makefile);
   unlink(backup);
#ifdef WIN32
   fclose(fdin);
#endif

   if (rename(makefile, backup) < 0)
      fatalerr("cannot rename %s to %s\n", makefile, backup);
#ifdef WIN32
   if ((fdin = fopen(backup, "r")) == NULL)
      fatalerr("cannot open \"%s\"\n", backup);

#endif

   if ((fdout = freopen(makefile, "w", stdout)) == NULL)
      fatalerr("cannot open \"%s\"\n", makefile);
   len = strlen(line);
   while (!found && fgets(buf, BUFSIZ, fdin)) {
      if (*buf == '#' && strncmp(line, buf, len) == 0)
         found = TRUE;
      fputs(buf, fdout);
   }
   if (!found) {
      if (verbose)
      warning("Adding new delimiting line \"%s\" and dependencies...\n",
         line);
      puts(line); /* same as fputs(fdout); but with newline */
   } else if (append) {
       while (fgets(buf, BUFSIZ, fdin)) {
      fputs(buf, fdout);
       }
   }
   fflush(fdout);
#if defined(USGISH) || defined(_SEQUENT_)
   chmod(makefile, st.st_mode);
#else
        fchmod(fileno(fdout), st.st_mode);
#endif /* USGISH */

   /* remove backup file */
   unlink(backup);
}

void
#if NeedVarargsPrototypes
fatalerr(char *msg, ...)
#else
/*VARARGS*/
fatalerr(msg,x1,x2,x3,x4,x5,x6,x7,x8,x9)
    char *msg;
#endif
{
#if NeedVarargsPrototypes
   va_list args;
#endif
   fprintf(error_out, "%s: error:  ", ProgramName);
#if NeedVarargsPrototypes
   va_start(args, msg);
   vfprintf(error_out, msg, args);
   va_end(args);
#else
   fprintf(error_out, msg,x1,x2,x3,x4,x5,x6,x7,x8,x9);
#endif
   exit (1);
}

void
#if NeedVarargsPrototypes
warning(char *msg, ...)
#else
/*VARARGS0*/
warning(msg,x1,x2,x3,x4,x5,x6,x7,x8,x9)
    char *msg;
#endif
{
#if NeedVarargsPrototypes
   va_list args;
#endif
   fprintf(error_out, "%s: warning:  ", ProgramName);
#if NeedVarargsPrototypes
   va_start(args, msg);
   vfprintf(error_out, msg, args);
   va_end(args);
#else
   fprintf(error_out, msg,x1,x2,x3,x4,x5,x6,x7,x8,x9);
#endif
}

void
#if NeedVarargsPrototypes
warning1(char *msg, ...)
#else
/*VARARGS0*/
warning1(msg,x1,x2,x3,x4,x5,x6,x7,x8,x9)
    char *msg;
#endif
{
#if NeedVarargsPrototypes
   va_list args;
   va_start(args, msg);
   vfprintf(error_out, msg, args);
   va_end(args);
#else
   fprintf(error_out, msg,x1,x2,x3,x4,x5,x6,x7,x8,x9);
#endif
}