The Tor Browser: security/nss/coreconf/mkdepend/parse.c@6474c204b198 (annotated)

security/nss/coreconf/mkdepend/parse.c@6474c204b198 (annotated)

security/nss/coreconf/mkdepend/parse.c

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* $Xorg: parse.c,v 1.6 2001/02/09 02:03:16 xorgcvs Exp $ */
 /*
 Copyright (c) 1993, 1994, 1998 The Open Group
 Permission to use, copy, modify, distribute, and sell this software and its
 documentation for any purpose is hereby granted without fee, provided that
 the above copyright notice appear in all copies and that both that
 copyright notice and this permission notice appear in supporting
 documentation.
 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
 OPEN GROUP 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 Open Group 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 Open Group.
 */
 /* $XFree86: xc/config/makedepend/parse.c,v 1.12 2002/02/26 05:09:10 tsi Exp $ */
 #include "def.h"
 extern char	*directives[];
 extern struct inclist	inclist[ MAXFILES ],
 			*inclistnext,
 			maininclist;
 extern char	*includedirs[ ],
 		**includedirsnext;
 static int deftype (char *line, struct filepointer *filep,
 		    struct inclist *file_red, struct inclist *file,
 		    int parse_it);
 static int zero_value(char *filename, char *exp, struct filepointer *filep,
 		    struct inclist *file_red);
 static int merge2defines(struct inclist *file1, struct inclist *file2);
 static int
 gobble(struct filepointer *filep, struct inclist *file,
        struct inclist *file_red)
 {
 	char	*line;
 	int	type;
 	while ((line = getnextline(filep))) {
 		switch(type = deftype(line, filep, file_red, file, FALSE)) {
 		case IF:
 		case IFFALSE:
 		case IFGUESSFALSE:
 		case IFDEF:
 		case IFNDEF:
 			type = gobble(filep, file, file_red);
 			while ((type == ELIF) || (type == ELIFFALSE) ||
 			       (type == ELIFGUESSFALSE))
 			    type = gobble(filep, file, file_red);
 			if (type == ELSE)
 			        (void)gobble(filep, file, file_red);
 			break;
 		case ELSE:
 		case ENDIF:
 			debug(0,("%s, line %d: #%s\n",
 				file->i_file, filep->f_line,
 				directives[type]));
 			return(type);
 		case DEFINE:
 		case UNDEF:
 		case INCLUDE:
 		case INCLUDEDOT:
 		case PRAGMA:
 		case ERROR:
 		case IDENT:
 		case SCCS:
 		case EJECT:
 		case WARNING:
 		case INCLUDENEXT:
 		case INCLUDENEXTDOT:
 			break;
 		case ELIF:
 		case ELIFFALSE:
 		case ELIFGUESSFALSE:
 			return(type);
 		case -1:
 			warning("%s", file_red->i_file);
 			if (file_red != file)
 				warning1(" (reading %s)", file->i_file);
 			warning1(", line %d: unknown directive == \"%s\"\n",
 				filep->f_line, line);
 			break;
 		}
 	}
 	return(-1);
 }
 /*
  * Decide what type of # directive this line is.
  */
 static int
 deftype (char *line, struct filepointer *filep,
 	     struct inclist *file_red, struct inclist *file, int parse_it)
 {
 	register char	*p;
 	char	*directive, savechar, *q;
 	register int	ret;
 	/*
 	 * Parse the directive...
 	 */
 	directive=line+1;
 	while (*directive == ' ' || *directive == '\t')
 		directive++;
 	p = directive;
 	while ((*p == '_') || (*p >= 'a' && *p <= 'z'))
 		p++;
 	savechar = *p;
 	*p = '\0';
 	ret = match(directive, directives);
 	*p = savechar;
 	/* If we don't recognize this compiler directive or we happen to just
 	 * be gobbling up text while waiting for an #endif or #elif or #else
 	 * in the case of an #elif we must check the zero_value and return an
 	 * ELIF or an ELIFFALSE.
 	 */
 	if (ret == ELIF && !parse_it)
 	{
 	    while (*p == ' ' || *p == '\t')
 		p++;
 	    /*
 	     * parse an expression.
 	     */
 	    debug(0,("%s, line %d: #elif %s ",
 		   file->i_file, filep->f_line, p));
 	    ret = zero_value(file->i_file, p, filep, file_red);
 	    if (ret != IF)
 	    {
 		debug(0,("false...\n"));
 		if (ret == IFFALSE)
 		    return(ELIFFALSE);
 		else
 		    return(ELIFGUESSFALSE);
 	    }
 	    else
 	    {
 		debug(0,("true...\n"));
 		return(ELIF);
 	    }
 	}
 	if (ret < 0 || ! parse_it)
 		return(ret);
 	/*
 	 * now decide how to parse the directive, and do it.
 	 */
 	while (*p == ' ' || *p == '\t')
 		p++;
 	q = p + strlen(p);
 	do {
 		q--;
 	} while (*q == ' ' || *q == '\t');
 	q[1] = '\0';
 	switch (ret) {
 	case IF:
 		/*
 		 * parse an expression.
 		 */
 		ret = zero_value(file->i_file, p, filep, file_red);
 		debug(0,("%s, line %d: %s #if %s\n",
 			 file->i_file, filep->f_line, ret?"false":"true", p));
 		break;
 	case IFDEF:
 	case IFNDEF:
 		debug(0,("%s, line %d: #%s %s\n",
 			file->i_file, filep->f_line, directives[ret], p));
 	case UNDEF:
 		/*
 		 * separate the name of a single symbol.
 		 */
 		while (isalnum(*p) || *p == '_')
 			*line++ = *p++;
 		*line = '\0';
 		break;
 	case INCLUDE:
 	case INCLUDENEXT:
 		debug(2,("%s, line %d: #include%s %s\n",
 			file->i_file, filep->f_line,
 			(ret == INCLUDE) ? "" : "_next", p));
 		/* Support ANSI macro substitution */
 		while (1) {
 			struct symtab **sym;
 			if (!*p || *p == '"' || *p == '<')
 				break;
 		    	sym = isdefined(p, file_red, NULL);
 			if (!sym)
 				break;
 			p = (*sym)->s_value;
 			debug(3,("%s : #includes SYMBOL %s = %s\n",
 			       file->i_incstring,
 			       (*sym) -> s_name,
 			       (*sym) -> s_value));
 			/* mark file as having included a 'soft include' */
 			file->i_flags |= INCLUDED_SYM;
 		}
 		/*
 		 * Separate the name of the include file.
 		 */
 		while (*p && *p != '"' && *p != '<')
 			p++;
 		if (! *p)
 			return(-2);
 		if (*p++ == '"') {
 			if (ret == INCLUDE)
 				ret = INCLUDEDOT;
 			else
 				ret = INCLUDENEXTDOT;
 			while (*p && *p != '"')
 				*line++ = *p++;
 		} else
 			while (*p && *p != '>')
 				*line++ = *p++;
 		*line = '\0';
 		break;
 	case DEFINE:
 		/*
 		 * copy the definition back to the beginning of the line.
 		 */
 		strcpy (line, p);
 		break;
 	case ELSE:
 	case ENDIF:
 	case ELIF:
 	case PRAGMA:
 	case ERROR:
 	case IDENT:
 	case SCCS:
 	case EJECT:
 	case WARNING:
 		debug(0,("%s, line %d: #%s\n",
 			file->i_file, filep->f_line, directives[ret]));
 		/*
 		 * nothing to do.
 		 */
 		break;
 	}
 	return(ret);
 }
 struct symtab **
 fdefined(char *symbol, struct inclist *file, struct inclist **srcfile)
 {
 	struct inclist	**ip;
 	struct symtab	**val;
 	int	i;
 	static int	recurse_lvl = 0;
 	if (file->i_flags & DEFCHECKED)
 		return(NULL);
 	debug(2,("Looking for %s in %s\n", symbol, file->i_file));
 	file->i_flags |= DEFCHECKED;
 	if ((val = slookup(symbol, file)))
 		debug(1,("%s defined in %s as %s\n",
 			 symbol, file->i_file, (*val)->s_value));
 	if (val == NULL && file->i_list)
 	{
 		for (ip = file->i_list, i=0; i < file->i_listlen; i++, ip++)
 			if (file->i_merged[i]==FALSE) {
 				val = fdefined(symbol, *ip, srcfile);
 				file->i_merged[i]=merge2defines(file,*ip);
 				if (val!=NULL) break;
 			}
 	}
 	else if (val != NULL && srcfile != NULL) *srcfile = file;
 	recurse_lvl--;
 	file->i_flags &= ~DEFCHECKED;
 	return(val);
 }
 struct symtab **
 isdefined(char *symbol, struct inclist *file, struct inclist **srcfile)
 {
 	struct symtab	**val;
 	if ((val = slookup(symbol, &maininclist))) {
 		debug(1,("%s defined on command line\n", symbol));
 		if (srcfile != NULL) *srcfile = &maininclist;
 		return(val);
 	}
 	if ((val = fdefined(symbol, file, srcfile)))
 		return(val);
 	debug(1,("%s not defined in %s\n", symbol, file->i_file));
 	return(NULL);
 }
 /*
  * Return type based on if the #if expression evaluates to 0
  */
 static int
 zero_value(char *filename,
 	   char *exp,
 	   struct filepointer *filep,
 	   struct inclist *file_red)
 {
 	if (cppsetup(filename, exp, filep, file_red))
 	    return(IFFALSE);
 	else
 	    return(IF);
 }
 void
 define2(char *name, char *val, struct inclist *file)
 {
     int first, last, below;
     register struct symtab **sp = NULL, **dest;
     struct symtab *stab;
     /* Make space if it's needed */
     if (file->i_defs == NULL)
     {
 	file->i_defs = (struct symtab **)
 			malloc(sizeof (struct symtab*) * SYMTABINC);
 	file->i_ndefs = 0;
     }
     else if (!(file->i_ndefs % SYMTABINC))
 	file->i_defs = (struct symtab **)
 			realloc(file->i_defs,
 			   sizeof(struct symtab*)*(file->i_ndefs+SYMTABINC));
     if (file->i_defs == NULL)
 	fatalerr("malloc()/realloc() failure in insert_defn()\n");
     below = first = 0;
     last = file->i_ndefs - 1;
     while (last >= first)
     {
 	/* Fast inline binary search */
 	register char *s1;
 	register char *s2;
 	register int middle = (first + last) / 2;
 	/* Fast inline strchr() */
 	s1 = name;
 	s2 = file->i_defs[middle]->s_name;
 	while (*s1++ == *s2++)
 	    if (s2[-1] == '\0') break;
 	/* If exact match, set sp and break */
 	if (*--s1 == *--s2)
 	{
 	    sp = file->i_defs + middle;
 	    break;
 	}
 	/* If name > i_defs[middle] ... */
 	if (*s1 > *s2)
 	{
 	    below = first;
 	    first = middle + 1;
 	}
 	/* else ... */
 	else
 	{
 	    below = last = middle - 1;
 	}
     }
     /* Search is done.  If we found an exact match to the symbol name,
        just replace its s_value */
     if (sp != NULL)
     {
 	debug(1,("redefining %s from %s to %s in file %s\n",
 		name, (*sp)->s_value, val, file->i_file));
 	free((*sp)->s_value);
 	(*sp)->s_value = copy(val);
 	return;
     }
     sp = file->i_defs + file->i_ndefs++;
     dest = file->i_defs + below + 1;
     while (sp > dest)
     {
 	*sp = sp[-1];
 	sp--;
     }
     stab = (struct symtab *) malloc(sizeof (struct symtab));
     if (stab == NULL)
 	fatalerr("malloc()/realloc() failure in insert_defn()\n");
     debug(1,("defining %s to %s in file %s\n", name, val, file->i_file));
     stab->s_name = copy(name);
     stab->s_value = copy(val);
     *sp = stab;
 }
 void
 define(char *def, struct inclist *file)
 {
     char *val;
     /* Separate symbol name and its value */
     val = def;
     while (isalnum(*val) || *val == '_')
 	val++;
     if (*val)
 	*val++ = '\0';
     while (*val == ' ' || *val == '\t')
 	val++;
     if (!*val)
 	val = "1";
     define2(def, val, file);
 }
 struct symtab **
 slookup(char *symbol, struct inclist *file)
 {
 	register int first = 0;
 	register int last = file->i_ndefs - 1;
 	if (file) while (last >= first)
 	{
 	    /* Fast inline binary search */
 	    register char *s1;
 	    register char *s2;
 	    register int middle = (first + last) / 2;
 	    /* Fast inline strchr() */
 	    s1 = symbol;
 	    s2 = file->i_defs[middle]->s_name;
 	    while (*s1++ == *s2++)
 	        if (s2[-1] == '\0') break;
 	    /* If exact match, we're done */
 	    if (*--s1 == *--s2)
 	    {
 	        return file->i_defs + middle;
 	    }
 	    /* If symbol > i_defs[middle] ... */
 	    if (*s1 > *s2)
 	    {
 	        first = middle + 1;
 	    }
 	    /* else ... */
 	    else
 	    {
 	        last = middle - 1;
 	    }
 	}
 	return(NULL);
 }
 static int
 merge2defines(struct inclist *file1, struct inclist *file2)
 {
 	int i;
 	if ((file1==NULL) || (file2==NULL) ||
 	    !(file2->i_flags & FINISHED))
 		return 0;
 	for (i=0; i < file2->i_listlen; i++)
 		if (file2->i_merged[i]==FALSE)
 			return 0;
 	{
 		int first1 = 0;
 		int last1 = file1->i_ndefs - 1;
 		int first2 = 0;
 		int last2 = file2->i_ndefs - 1;
                 int first=0;
                 struct symtab** i_defs = NULL;
 		int deflen=file1->i_ndefs+file2->i_ndefs;
 		debug(2,("merging %s into %s\n",
 			file2->i_file, file1->i_file));
                 if (deflen>0)
                 {
                 	/* make sure deflen % SYMTABINC == 0 is still true */
                 	deflen += (SYMTABINC - deflen % SYMTABINC) % SYMTABINC;
                 	i_defs=(struct symtab**)
 			    malloc(deflen*sizeof(struct symtab*));
                 	if (i_defs==NULL) return 0;
         	}
         	while ((last1 >= first1) && (last2 >= first2))
         	{
 	    		char *s1=file1->i_defs[first1]->s_name;
 	    		char *s2=file2->i_defs[first2]->s_name;
      			if (strcmp(s1,s2) < 0)
                         	i_defs[first++]=file1->i_defs[first1++];
      			else if (strcmp(s1,s2) > 0)
                         	i_defs[first++]=file2->i_defs[first2++];
                         else /* equal */
                         {
                         	i_defs[first++]=file2->i_defs[first2++];
                                 first1++;
                         }
         	}
         	while (last1 >= first1)
         	{
                         i_defs[first++]=file1->i_defs[first1++];
         	}
         	while (last2 >= first2)
         	{
                         i_defs[first++]=file2->i_defs[first2++];
         	}
                 if (file1->i_defs) free(file1->i_defs);
                 file1->i_defs=i_defs;
                 file1->i_ndefs=first;
 		return 1;
   	}
 }
 void
 undefine(char *symbol, struct inclist *file)
 {
 	register struct symtab **ptr;
 	struct inclist *srcfile;
 	while ((ptr = isdefined(symbol, file, &srcfile)) != NULL)
 	{
 	    srcfile->i_ndefs--;
 	    for (; ptr < srcfile->i_defs + srcfile->i_ndefs; ptr++)
 		*ptr = ptr[1];
 	}
 }
 int
 find_includes(struct filepointer *filep, struct inclist *file,
 	      struct inclist *file_red, int recursion, boolean failOK)
 {
 	struct inclist	*inclistp;
 	char		**includedirsp;
 	register char	*line;
 	register int	type;
 	boolean recfailOK;
 	while ((line = getnextline(filep))) {
 		switch(type = deftype(line, filep, file_red, file, TRUE)) {
 		case IF:
 		doif:
 			type = find_includes(filep, file,
 				file_red, recursion+1, failOK);
 			while ((type == ELIF) || (type == ELIFFALSE) ||
 			       (type == ELIFGUESSFALSE))
 				type = gobble(filep, file, file_red);
 			if (type == ELSE)
 				gobble(filep, file, file_red);
 			break;
 		case IFFALSE:
 		case IFGUESSFALSE:
 		    doiffalse:
 			if (type == IFGUESSFALSE || type == ELIFGUESSFALSE)
 			    recfailOK = TRUE;
 			else
 			    recfailOK = failOK;
 			type = gobble(filep, file, file_red);
 			if (type == ELSE)
 			    find_includes(filep, file,
 					  file_red, recursion+1, recfailOK);
 			else
 			if (type == ELIF)
 			    goto doif;
 			else
 			if ((type == ELIFFALSE) || (type == ELIFGUESSFALSE))
 			    goto doiffalse;
 			break;
 		case IFDEF:
 		case IFNDEF:
 			if ((type == IFDEF && isdefined(line, file_red, NULL))
 			 || (type == IFNDEF && !isdefined(line, file_red, NULL))) {
 				debug(1,(type == IFNDEF ?
 				    "line %d: %s !def'd in %s via %s%s\n" : "",
 				    filep->f_line, line,
 				    file->i_file, file_red->i_file, ": doit"));
 				type = find_includes(filep, file,
 					file_red, recursion+1, failOK);
 				while (type == ELIF || type == ELIFFALSE || type == ELIFGUESSFALSE)
 					type = gobble(filep, file, file_red);
 				if (type == ELSE)
 					gobble(filep, file, file_red);
 			}
 			else {
 				debug(1,(type == IFDEF ?
 				    "line %d: %s !def'd in %s via %s%s\n" : "",
 				    filep->f_line, line,
 				    file->i_file, file_red->i_file, ": gobble"));
 				type = gobble(filep, file, file_red);
 				if (type == ELSE)
 					find_includes(filep, file,
 						file_red, recursion+1, failOK);
 				else if (type == ELIF)
 				    	goto doif;
 				else if (type == ELIFFALSE || type == ELIFGUESSFALSE)
 				    	goto doiffalse;
 			}
 			break;
 		case ELSE:
 		case ELIFFALSE:
 		case ELIFGUESSFALSE:
 		case ELIF:
 			if (!recursion)
 				gobble(filep, file, file_red);
 		case ENDIF:
 			if (recursion)
 				return(type);
 		case DEFINE:
 			define(line, file);
 			break;
 		case UNDEF:
 			if (!*line) {
 			    warning("%s", file_red->i_file);
 			    if (file_red != file)
 				warning1(" (reading %s)", file->i_file);
 			    warning1(", line %d: incomplete undef == \"%s\"\n",
 				filep->f_line, line);
 			    break;
 			}
 			undefine(line, file_red);
 			break;
 		case INCLUDE:
 		case INCLUDEDOT:
 		case INCLUDENEXT:
 		case INCLUDENEXTDOT:
 			inclistp = inclistnext;
 			includedirsp = includedirsnext;
 			debug(2,("%s, reading %s, includes %s\n",
 				file_red->i_file, file->i_file, line));
 			add_include(filep, file, file_red, line, type, failOK);
 			inclistnext = inclistp;
 			includedirsnext = includedirsp;
 			break;
 		case ERROR:
 		case WARNING:
 		    	warning("%s", file_red->i_file);
 			if (file_red != file)
 				warning1(" (reading %s)", file->i_file);
 			warning1(", line %d: %s\n",
 				 filep->f_line, line);
 		    	break;
 		case PRAGMA:
 		case IDENT:
 		case SCCS:
 		case EJECT:
 			break;
 		case -1:
 			warning("%s", file_red->i_file);
 			if (file_red != file)
 			    warning1(" (reading %s)", file->i_file);
 			warning1(", line %d: unknown directive == \"%s\"\n",
 				 filep->f_line, line);
 			break;
 		case -2:
 			warning("%s", file_red->i_file);
 			if (file_red != file)
 			    warning1(" (reading %s)", file->i_file);
 			warning1(", line %d: incomplete include == \"%s\"\n",
 				 filep->f_line, line);
 			break;
 		}
 	}
 	file->i_flags |= FINISHED;
 	debug(2,("finished with %s\n", file->i_file));
 	return(-1);
 }

The Tor Browser / annotate

security/nss/coreconf/mkdepend/parse.c@6474c204b198 (annotated)

security/nss/coreconf/mkdepend/parse.c