mirror of
https://github.com/rn10950/RetroZilla.git
synced 2024-11-14 11:40:13 +01:00
687 lines
16 KiB
C
687 lines
16 KiB
C
/* $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);
|
|
}
|