/* $XConsortium: main.c /main/84 1996/12/04 10:11:23 swick $ */
/* $XFree86: xc/config/makedepend/main.c,v 3.11.2.1 1997/05/11 05:04:07 dawes Exp $ */
/*

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.

*/

#if !defined(USGISH) || !defined(_SEQUENT_) || !defined(USE_CHMOD)
#define _DEFAULT_SOURCE /* def.h includes sys/stat and we need _BSD_SOURCE for fchmod see man fchmod */
#endif

#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

#include <stdarg.h>
#ifndef WIN32
#include <unistd.h>
#else
#include <io.h>
#endif
#ifdef MINIX
#define USE_CHMOD 1
#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",
   "warning",
   NULL
};

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

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

char *filelist[ MAXFILES ];
char *targetlist[ MAXFILES ];
char *includedirs[ MAXDIRS + 1 ];
char *notdotdot[ MAXDIRS ];
char *objprefix = "";
char *objsuffix = OBJSUFFIX;
char *startat = "# DO NOT DELETE";
char  *isysroot = "";
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 */

void freefile(struct filepointer*);
void redirect(char*, char*);

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

#if defined(USG) || (defined(i386) && defined(SYSV)) || defined(WIN32) || defined(__EMX__) || defined(Lynx_22)
#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
struct sigaction sig_act;
#endif /* USGISH */

extern void define2(char *name, char *val, struct inclist *file);
extern void define(char *def, struct inclist *file);
extern void undefine(char *symbol, struct inclist *file);
extern int find_includes(struct filepointer *filep, struct inclist *file,
                            struct inclist *file_red, int recursion,
                            boolean failOK);
extern void recursive_pr_include(struct inclist *head, char *file, char *base, char *dep);
extern void inc_clean();

int main_orig(argc, argv)
int argc;
char **argv;
{
   register char **fp = filelist;
   register char  **tp = targetlist;
   register char **incp = includedirs;
   register char *p;
   register struct inclist *ip;
   char *makefile = NULL;
   struct filepointer *filecontent;
   struct symtab *psymp = predefs;
   char *endmarker = NULL;
   char *defincdir = NULL;
   char **undeflist = NULL;
   int numundefs = 0, i;
   int numfiles = 0;

   ProgramName = argv[0];

   while (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];
         *tp++ = 0;
         ++numfiles;
         continue;
      }
      switch (argv[0][1]) {
         case '-':
            endmarker = &argv[0][2];
            if (endmarker[0] == '\0') endmarker = "--";
            break;
         case 't':
            if (endmarker) break;
            if (numfiles == 0) {
               fatalerr("-t should follow a file name\n");
            } else {
               *(tp - 1) = argv[0] + 2;
            }
            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 'U':
            /* Undef's override all -D's so save them up */
            numundefs++;
            if (numundefs == 1)
               undeflist = malloc(sizeof(char *));
            else
               undeflist = realloc(undeflist,
                                   numundefs * sizeof(char *));
            if (argv[0][2] == '\0') {
               argv++;
               argc--;
            }
            undeflist[numundefs - 1] = argv[0] + 2;
            break;
         case 'Y':
            defincdir = argv[0] + 2;
            break;
         case 'i':
            if (!strcmp(argv[0] + 2, "sysroot")) {
               argv++;
               argc--;
               isysroot = argv[0];
            }
            break;
            /* do not use if endmarker processing */
         case 'a':
            if (endmarker) break;
            append = 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;
         case 's':
            if (endmarker) break;
            startat = argv[0] + 2;
            if (*startat == '\0') {
               startat = *(++argv);
               argc--;
            }
            if (*startat != '#')
               fatalerr("-s flag's value should start %s\n",
                        "with '#'.");
            break;
         case 'f':
            if (endmarker) break;
            makefile = argv[0] + 2;
            if (*makefile == '\0') {
               makefile = *(++argv);
               argc--;
            }
            break;

         case 'm':
            warn_multiple = TRUE;
            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]);
      }
   }
   /* Now do the undefs from the command line */
   for (i = 0; i < numundefs; i++)
      undefine(undeflist[i], &maininclist);
   if (numundefs > 0)
      free(undeflist);

   if (!defincdir) {
#ifdef PREINCDIR
      if (incp >= includedirs + MAXDIRS)
         fatalerr("Too many -I flags.\n");
      *incp++ = PREINCDIR;
#endif
#ifdef __EMX__
      {
         char *emxinc = getenv("C_INCLUDE_PATH");
         /* can have more than one component */
         if (emxinc) {
            char *beg, *end;
            beg = (char*)strdup(emxinc);
            for (;;) {
               end = (char*)strchr(beg, ';');
               if (end) *end = 0;
               if (incp >= includedirs + MAXDIRS)
                  fatalerr("Too many include dirs\n");
               *incp++ = beg;
               if (!end) break;
               beg = end + 1;
            }
         }
      }
#else /* !__EMX__, does not use INCLUDEDIR at all */
      if (incp >= includedirs + MAXDIRS)
         fatalerr("Too many -I flags.\n");
      *incp++ = INCLUDEDIR;
#endif

#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);

   /*
    * 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 */

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

      find_includes(filecontent, ip, ip, 0, FALSE);
      freefile(filecontent);
      if (!rootBuild)
         recursive_pr_include(ip, ip->i_file, base_name(*fp), *tp);
      else
         recursive_pr_include(ip, ip->i_file, base_name(makefile), *tp);
      inc_clean();
   }
   if (!rootBuild) {
      if (printed)
         printf("\n");
      exit(0);
   }
   return 0;
}

#ifdef __EMX__
/*
 * eliminate \r chars from file
 */
static int elim_cr(char *buf, int sz)
{
   int i, wp;
   for (i = wp = 0; i < sz; i++) {
      if (buf[i] != '\r')
         buf[wp++] = buf[i];
   }
   return wp;
}
#endif

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);
      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);
#ifdef __EMX__
   st.st_size = elim_cr(content->f_base, st.st_size);
#endif
   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);
}

int match(str, list)
register char *str, **list;
{
   register int i;

   for (i = 0; *list; i++, list++)
      if (strcmp(str, *list) == 0)
         return(i);
   return(-1);
}

/*
 * Get the next line.  We only return lines beginning with '#' since that
 * is all this program is ever interested in.
 */
char *rgetline(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 == '/') {
         if (*(p + 1) == '/') { /* consume C++ comments */
            *p++ = ' ', *p++ = ' ';
            while (*p && *p != '\n')
               *p++ = ' ';
            p--;
            continue;
         } else if (*(p + 1) == '*') { /* consume C comments */
            *p++ = ' ', *p++ = ' ';
            while (*p) {
               if (*p == '*' && *(p + 1) == '/') {
                  *p++ = ' ', *p = ' ';
                  break;
               } else if (*p == '\n')
                  lineno++;
               *p++ = ' ';
            }
            continue;
         }
      } 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 == '\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)
register char *file;
{
   register char *p;

   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) && !defined(__EMX__) && !defined(clipper) && !defined(__clipper__)
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,
*makefile;
{
   struct stat st;
   FILE *fdin = 0, *fdout = 0;
   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 (!rootBuild) {
      if ((fdin = fopen(makefile, "r")) == NULL)
         fatalerr("cannot open \"%s\"\n", makefile);
      sprintf(backup, "%s.bak", makefile);
      unlink(backup);
#if defined(WIN32) || defined(__EMX__)
      fclose(fdin);
#endif
      if (rename(makefile, backup) < 0)
         fatalerr("cannot rename %s to %s\n", makefile, backup);
#if defined(WIN32) || defined(__EMX__)
      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);
   if (!rootBuild) {
      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_) || defined(USE_CHMOD)
      chmod(makefile, st.st_mode);
#else
      fchmod(fileno(fdout), st.st_mode);
      fclose(fdin);
#endif /* USGISH */
   } else {
      printf(" "); /* we need this to update the time stamp! */
      fflush(fdout);
   }
}

void fatalerr(char *msg, ...)
{
   va_list args;
   fprintf(stderr, "%s: error:  ", ProgramName);
   va_start(args, msg);
   vfprintf(stderr, msg, args);
   va_end(args);
   exit(1);
}

void warning(char *msg, ...)
{
   if (!rootBuild) {
      va_list args;
      fprintf(stderr, "%s: warning:  ", ProgramName);
      va_start(args, msg);
      vfprintf(stderr, msg, args);
      va_end(args);
   }
}

void warning1(char *msg, ...)
{
   if (!rootBuild) {
      va_list args;
      va_start(args, msg);
      vfprintf(stderr, msg, args);
      va_end(args);
   }
}