WebSVN – DevTools – /core_devl/trunk/UTILS/MKDEPEND/include.c

/* $XConsortium: include.c /main/18 1995/12/08 18:26:35 gildea $ */
/*

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"

extern struct   inclist inclist[ MAXFILES ],
                *inclistp;
extern char     *includedirs[ ];
extern char     *notdotdot[ ];
extern boolean  show_where_not;
extern boolean  warn_multiple;

struct inclist *inc_path(file, include, dot)
        register char   *file,
                        *include;
        boolean dot;
{
        static char     path[ MAX_PATH+1 ];
        register char   **pp, *p;
        register struct inclist *ip;
        struct stat     st;
        boolean found = FALSE;

//        inc_dump();
        /*
         * Check all previously found include files for a path that
         * has already been expanded.
         */
        for (ip = inclist; ip->i_file; ip++)
        {
            if ((strcmp(ip->i_incstring, include) == 0) /* && !(ip->i_flags & INCLUDED_SYM) */ )
            {

                /*
                **  Previously the inc_path function would return NOT FOUND unless the
                **  INCLUDED_SYM flag was not set. This would result in multiple entries
                **  being created and this would result in elements being missed in
                **  the dependancy list.
                **
                **  The INCLUDED_SYM flag is set when a file #includes another file
                **  through the use of a macro name. ie: #include TIME_LIBRARY
                **
                **  Not sure why INCLUDED_SYM need to be cleared
                **  Possibly there are cases where different source files might include
                **  different #defines and different included files.
                **
                **  Whatever. The program will misbehave. It will get the wrong list
                **  of dependancies.
                **
                **  Perhaps the Symbolic entries need to be killed after processing
                **  each major source file.
                **
                **  Generate a debug message for potential future use
                */
                if ( (ip->i_flags & INCLUDED_SYM) )
                {
                    if ( !(ip->i_flags & INCLUDED_SYMW) )
                    {
                        warning( "Symbolic include file included by: %s\n", include );
                        ip->i_flags |= INCLUDED_SYMW;
                    }
                }
                found = TRUE;
                break;
            }
        }

        /*
         * If the path was surrounded by "" or is an absolute path,
         * then check the exact path provided.
         */
        if (!found && (dot || *include == '/')) {
                if (stat(include, &st) == 0) {
                        ip = newinclude(include, include);
                        found = TRUE;
                }
                else if (show_where_not)
                        warning1("\tnot in %s\n", include);
        }

        /*
         * If the path was surrounded by "" see if this include file is in the
         * directory of the file being parsed.
         */
        if (!found && dot) {
                for (p=file+strlen(file); p>file; p--)
                        if (*p == '/')
                                break;
                if (p == file)
                        strcpy(path, include);
                else {
                        strncpy(path, file, (p-file) + 1);
                        path[ (p-file) + 1 ] = '\0';
                        strcpy(path + (p-file) + 1, include);
                }
                remove_dotdot(path);
                if (stat(path, &st) == 0) {
                        ip = newinclude(path, include);
                        found = TRUE;
                }
                else if (show_where_not)
                        warning1("\tnot in %s\n", path);
        }

        /*
         * Check the include directories specified. (standard include dir
         * should be at the end.)
         */
        if (!found)
                for (pp = includedirs; *pp; pp++) {
                        sprintf(path, "%s/%s", *pp, include);
                        remove_dotdot(path);
                        if (stat(path, &st) == 0) {
                                ip = newinclude(path, include);
                                found = TRUE;
                                break;
                        }
                        else if (show_where_not)
                                warning1("\tnot in %s\n", path);
                }

        if (!found)
                ip = NULL;
        return(ip);
}

/*
 * Occasionally, pathnames are created that look like .../x/../y
 * Any of the 'x/..' sequences within the name can be eliminated.
 * (but only if 'x' is not a symbolic link!!)
 */
remove_dotdot(path)
        char            *path;
{
        register char   *end, *from, *to, **cp;
        char            *components[ MAX_PATH+1 ],
                        newpath[ MAX_PATH+1 ];
        boolean         component_copied;

        /*
         *     slice path up into components.
         */
        to = newpath;
        if (*path == '/')
                *to++ = '/';
        *to = '\0';
        cp = components;
        for (from=end=path; *end; end++)
                if (*end == '/') {
                        while (*end == '/')
                                *end++ = '\0';
                        if (*from)
                                *cp++ = from;
                        from = end;
                        if (*end == '\0')
                                break;  /* handle paths with trailing '/' */
               }
        *cp++ = from;
        *cp = NULL;

        /*
         * Recursively remove all 'x/..' component pairs.
         */
        cp = components;
        while (*cp) {
                if (!isdot(*cp) && !isdotdot(*cp) && isdotdot(*(cp+1))
                        && !issymbolic(newpath, *cp))
                {
                    char **fp = cp+2;
                    char **tp = cp;

                    do 
                        *tp++ = *fp; /* move all the pointers down */
                    while (*fp++);
                    *tp = NULL;      
                    if (cp != components)
                        cp--;        /* go back and check for nested ".." */
                } else {
                    cp++;
                }
        }

        /*
         * Concatenate the remaining path elements.
         */
        cp = components;
        component_copied = FALSE;
        while (*cp) {
                if (component_copied)
                        *to++ = '/';
                component_copied = TRUE;
                for (from = *cp; *from;)
                        *to++ = *from++;
                *to = '\0';
                cp++;
        }
        *to++ = '\0';

        /*
         * copy the reconstituted path back to our pointer.
         */
        strcpy(path, newpath);
        return (0);
}

isdot(p)
        register char   *p;
{
        if(p && *p++ == '.' && *p++ == '\0')
                return(TRUE);
        return(FALSE);
}

isdotdot(p)
        register char   *p;
{
        if(p && *p++ == '.' && *p++ == '.' && *p++ == '\0')
                return(TRUE);
        return(FALSE);
}

issymbolic(dir, component)
        register char   *dir, *component;
{
#ifdef S_IFLNK
        struct stat     st;
        char            buf[ MAX_PATH+1 ], **pp;

        sprintf(buf, "%s%s%s", dir, *dir ? "/" : "", component);
        for (pp=notdotdot; *pp; pp++)
                if (strcmp(*pp, buf) == 0)
                        return (TRUE);
        if (lstat(buf, &st) == 0
        && (st.st_mode & S_IFMT) == S_IFLNK) {
                *pp++ = copy(buf);
                if (pp >= &notdotdot[ MAXDIRS ])
                        fatalerr("out of .. dirs, increase MAXDIRS\n");
                return(TRUE);
        }
#else
        (void) dir, component; 
#endif
        return(FALSE);
}

/*
 * Add an include file to the list of those included by 'file'.
 */
struct inclist *newinclude(newfile, incstring)
        register char   *newfile, *incstring;
{
        register struct inclist *ip;

        /*
         * First, put this file on the global list of include files.
         */
        ip = inclistp++;
        if (inclistp >= inclist + MAXFILES - 1)
                fatalerr("out of space: increase MAXFILES\n");
        ip->i_file = copy(newfile);

        /*
         * add to file list
         */
        if (incstring == NULL)
                ip->i_incstring = ip->i_file;
        else 
                ip->i_incstring = copy(incstring);
        return(ip);
}


void
included_by(ip, newfile)
        register struct inclist *ip, *newfile;
{
        register i;

        if (ip == NULL)
                return;
        /*
         * Put this include file (newfile) on the list of files included
         * by 'file'.  If 'file' is NULL, then it is not an include
         * file itself (i.e. was probably mentioned on the command line).
         * If it is already on the list, don't stick it on again.
         */
        if (ip->i_list == NULL) {
                ip->i_list = (struct inclist **)
                        malloc(sizeof(struct inclist *) * ++ip->i_listlen);
                ip->i_merged = (boolean *)
                    malloc(sizeof(boolean) * ip->i_listlen);
        } else {
                for (i=0; i<ip->i_listlen; i++)
                        if (ip->i_list[ i ] == newfile) {
                            i = strlen(newfile->i_file);
                            if (!(ip->i_flags & INCLUDED_SYM) &&
                                !(i > 2 &&
                                  newfile->i_file[i-1] == 'c' &&
                                  newfile->i_file[i-2] == '.'))
                            {
                                /* only bitch if ip has */
                                /* no #include SYMBOL lines  */
                                /* and is not a .c file */
                                if (warn_multiple)
                                {
                                        warning("%s includes %s more than once!\n",
                                                ip->i_file, newfile->i_file);
                                        warning1("Already have\n");
                                        for (i=0; i<ip->i_listlen; i++)
                                                warning1("\t%s\n", ip->i_list[i]->i_file);
                                }
                            }
                            return;
                        }
                ip->i_list = (struct inclist **) realloc(ip->i_list,
                        sizeof(struct inclist *) * ++ip->i_listlen);
                ip->i_merged = (boolean *)
                        realloc(ip->i_merged, sizeof(boolean) * ip->i_listlen);
        }
        ip->i_list[ ip->i_listlen-1 ] = newfile;
        ip->i_merged[ ip->i_listlen-1 ] = FALSE;
        return;
}


void
inc_clean ()
{
        register struct inclist *ip;

        for (ip = inclist; ip < inclistp; ip++) {
                ip->i_flags &= ~MARKED;
        }
        return;
}

void inc_dump(void)
{
    register struct inclist *ip;
    int i;

    if ( ! _debugmask )
        return;

    for (ip = inclist; ip < inclistp; ip++)
    {
        debug (1,( "####Dump Include Entry: %s\n", ip->i_file ));
        for (i = 0; i < ip->i_listlen; i++)
            debug(1,("####Dump \t%s\n", ip->i_list[ i ]->i_incstring));
    }
    debug (1,( "####End Dump\n" ));
}
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