#include "def.h"
extern char *directives[];
extern struct inclist maininclist;
find_includes(filep, file, file_red, recursion, failOK)
struct filepointer *filep;
struct inclist *file, *file_red;
int recursion;
boolean failOK;
{
register char *line;
register int type;
boolean recfailOK;
while (line = getline(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, line %d: incomplete undef == \"%s\"\n",
file_red->i_file, filep->f_line, line);
break;
}
undefine(line, file_red);
break;
case INCLUDE:
add_include(filep, file, file_red, line, FALSE, failOK);
break;
case INCLUDEDOT:
add_include(filep, file, file_red, line, TRUE, failOK);
break;
case ERROR:
warning("%s: %d: %s\n", file_red->i_file,
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;
}
}
return(-1);
}
gobble(filep, file, file_red)
register struct filepointer *filep;
struct inclist *file, *file_red;
{
register char *line;
register int type;
while (line = getline(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:
break;
case ELIF:
case ELIFFALSE:
case ELIFGUESSFALSE:
return(type);
case -1:
warning("%s, line %d: unknown directive == \"%s\"\n",
file_red->i_file, filep->f_line, line);
break;
}
}
return(-1);
}
int deftype (line, filep, file_red, file, parse_it)
register char *line;
register struct filepointer *filep;
register struct inclist *file_red, *file;
int parse_it;
{
register char *p;
char *directive, savechar;
register int ret;
directive=line+1;
while (*directive == ' ' || *directive == '\t')
directive++;
p = directive;
while (*p >= 'a' && *p <= 'z')
p++;
savechar = *p;
*p = '\0';
ret = match(directive, directives);
*p = savechar;
if (ret == ELIF && !parse_it)
{
while (*p == ' ' || *p == '\t')
p++;
debug(0,("%s, line %d: #elif %s ",
file->i_file, filep->f_line, p));
ret = zero_value(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);
while (*p == ' ' || *p == '\t')
p++;
switch (ret) {
case IF:
ret = zero_value(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:
while (isalnum(*p) || *p == '_')
*line++ = *p++;
*line = '\0';
break;
case INCLUDE:
debug(2,("%s, line %d: #include %s\n",
file->i_file, filep->f_line, p));
{
struct symtab *sym = isdefined(p, file_red, NULL);
while (sym) {
p = sym->s_value;
debug(3,("%s : #includes SYMBOL %s = %s\n",
file->i_incstring,
sym -> s_name,
sym -> s_value));
file->i_included_sym = TRUE;
sym = isdefined(p, file_red, NULL);
}
}
while (*p && *p != '"' && *p != '<')
p++;
if (! *p)
return(-2);
if (*p++ == '"') {
ret = INCLUDEDOT;
while (*p && *p != '"')
*line++ = *p++;
} else
while (*p && *p != '>')
*line++ = *p++;
*line = '\0';
break;
case DEFINE:
strcpy (line, p);
break;
case ELSE:
case ENDIF:
case ELIF:
case PRAGMA:
case ERROR:
case IDENT:
case SCCS:
case EJECT:
debug(0,("%s, line %d: #%s\n",
file->i_file, filep->f_line, directives[ret]));
break;
}
return(ret);
}
struct symtab *isdefined(symbol, file, srcfile)
register char *symbol;
struct inclist *file;
struct inclist **srcfile;
{
register 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);
}
struct symtab *fdefined(symbol, file, srcfile)
register char *symbol;
struct inclist *file;
struct inclist **srcfile;
{
register struct inclist **ip;
register struct symtab *val;
register int i;
static int recurse_lvl = 0;
if (file->i_defchecked)
return(NULL);
file->i_defchecked = TRUE;
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 (val = fdefined(symbol, *ip, srcfile)) {
break;
}
}
else if (val != NULL && srcfile != NULL) *srcfile = file;
recurse_lvl--;
file->i_defchecked = FALSE;
return(val);
}
zero_value(exp, filep, file_red)
register char *exp;
register struct filepointer *filep;
register struct inclist *file_red;
{
if (cppsetup(exp, filep, file_red))
return(IFFALSE);
else
return(IF);
}
define(def, file)
char *def;
struct inclist *file;
{
char *val;
val = def;
while (isalnum(*val) || *val == '_')
val++;
if (*val)
*val++ = '\0';
while (*val == ' ' || *val == '\t')
val++;
if (!*val)
val = "1";
define2(def, val, file);
}
define2(name, val, file)
char *name, *val;
struct inclist *file;
{
int first, last, below;
register struct symtab *sp = NULL, *dest;
if (file->i_defs == NULL)
{
file->i_defs = (struct symtab *)
malloc(sizeof (struct symtab) * SYMTABINC);
file->i_deflen = SYMTABINC;
file->i_ndefs = 0;
}
else if (file->i_ndefs == file->i_deflen)
file->i_defs = (struct symtab *)
realloc(file->i_defs,
sizeof(struct symtab)*(file->i_deflen+=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)
{
register char *s1;
register char *s2;
register int middle = (first + last) / 2;
s1 = name;
s2 = file->i_defs[middle].s_name;
while (*s1++ == *s2++)
if (s2[-1] == '\0') break;
if (*--s1 == *--s2)
{
sp = file->i_defs + middle;
break;
}
if (*s1 > *s2)
{
below = first;
first = middle + 1;
}
else
{
below = last = middle - 1;
}
}
if (sp != NULL)
{
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--;
}
sp->s_name = copy(name);
sp->s_value = copy(val);
}
struct symtab *slookup(symbol, file)
register char *symbol;
register struct inclist *file;
{
register int first = 0;
register int last = file->i_ndefs - 1;
if (file) while (last >= first)
{
register char *s1;
register char *s2;
register int middle = (first + last) / 2;
s1 = symbol;
s2 = file->i_defs[middle].s_name;
while (*s1++ == *s2++)
if (s2[-1] == '\0') break;
if (*--s1 == *--s2)
{
return file->i_defs + middle;
}
if (*s1 > *s2)
{
first = middle + 1;
}
else
{
last = middle - 1;
}
}
return(NULL);
}
undefine(symbol, file)
char *symbol;
register 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];
}
}