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

 * Motif
 *
 * Copyright (c) 1987-2012, The Open Group. All rights reserved.
 *
 * These libraries and programs are free software; you can
 * redistribute them and/or modify them under the terms of the GNU
 * Lesser General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * These libraries and programs are distributed in the hope that
 * they will be useful, but WITHOUT ANY WARRANTY; without even the
 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE. See the GNU Lesser General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with these librararies and programs; if not, write
 * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
 * Floor, Boston, MA 02110-1301 USA

*/

#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 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	*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 */

void freefile();
void redirect();
#if !NeedVarargsPrototypes
void fatalerr();
void warning();
void warning1();
#endif

static
#ifdef SIGNALRETURNSINT
int
#else
void
#endif
catch (sig)
    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 */

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 = predefs;
	char *endmarker = NULL;
	char *defincdir = NULL;
	char **undeflist = NULL;
	int numundefs = 0, i;

	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];
			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 '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;
		/* 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; *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));
		inc_clean();
	}
	if (printed)
		printf("\n");
	exit(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 *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;
		}
#if defined(WIN32) || defined(__EMX__)
		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)
	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, *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);
#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", backup);
	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);
#endif /* USGISH */
}

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(stderr, "%s: error:  ", ProgramName);
#if NeedVarargsPrototypes
	va_start(args, msg);
	vfprintf(stderr, msg, args);
	va_end(args);
#else
	fprintf(stderr, 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(stderr, "%s: warning:  ", ProgramName);
#if NeedVarargsPrototypes
	va_start(args, msg);
	vfprintf(stderr, msg, args);
	va_end(args);
#else
	fprintf(stderr, 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(stderr, msg, args);
	va_end(args);
#else
	fprintf(stderr, msg,x1,x2,x3,x4,x5,x6,x7,x8,x9);
#endif
}