/* $XConsortium: main.c,v 1.83 94/04/17 20:10:36 gildea 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.

*/

#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
};

#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 THIS LINE -- make depend depends on it.";

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 */


struct filepointer 	*getfile();
void 			freefile();
char 			*copy();
int 			match();
char 			*getline();
char 			*base_name();
int 			rename ();
void 			redirect();
void 			fatalerr();
void 			warning();
void 			warning1();
void 			define();
void 			define2();
int			find_includes();
void 			inc_clean();
void 			recursive_pr_include();

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

#if defined(USG) || (defined(SYSV386) && defined(SYSV)) || defined(WIN32)
#define USGISH
#endif


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;

	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 '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]);
		}
	}
	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);

	/*
	 * catch signals.
	 */

	/*
	** Recoded so as not to use sigaction  -  Bambi
	*/

#ifdef SIGHUP
	signal (SIGHUP, catch);
#endif
#ifdef SIGINT
	signal (SIGINT, catch);
#endif
#ifdef SIGQUIT
	signal (SIGQUIT, catch);
#endif
#ifdef SIGILL
	signal (SIGILL, catch);
#endif
#ifdef SIGBUS
	signal (SIGBUS, catch);
#endif
#ifdef SIGSEGV
	signal (SIGSEGV, catch);
#endif
#ifdef SIGSYS
	signal (SIGSYS, catch);
#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));
		inc_clean();
	}
	if (printed)
		printf("\n");
	exit(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);
		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);
}

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	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)
	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)
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')
		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", 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);
	chmod(makefile, st.st_mode);
}

#if NeedVarargsPrototypes
void fatalerr(char *msg, ...)
#else
/*VARARGS*/
void 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);
}

#if NeedVarargsPrototypes
void warning(char *msg, ...)
#else
/*VARARGS0*/
void 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
}

#if NeedVarargsPrototypes
void warning1(char *msg, ...)
#else
/*VARARGS0*/
void 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
}
