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/*
* Exported functions of the Wine preprocessor
*
* Copyright 1998 Bertho A. Stultiens
* Copyright 2002 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <ctype.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <time.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include "wpp_private.h"
#include "wine/wpp.h"
struct pp_status pp_status;
#define HASHKEY 2039
static struct list pp_defines[HASHKEY];
#define MAXIFSTACK 64
static pp_if_state_t if_stack[MAXIFSTACK];
static int if_stack_idx = 0;
int ppy_debug, pp_flex_debug;
struct define
{
struct list entry;
char *name;
char *value;
};
static struct list cmdline_defines = LIST_INIT( cmdline_defines );
void *pp_xmalloc(size_t size)
{
void *res;
assert(size > 0);
res = malloc(size);
if(res == NULL)
{
fprintf( stderr, "Virtual memory exhausted\n" );
exit(1);
}
return res;
}
void *pp_xrealloc(void *p, size_t size)
{
void *res;
assert(size > 0);
res = realloc(p, size);
if(res == NULL)
{
fprintf( stderr, "Virtual memory exhausted\n" );
exit(1);
}
return res;
}
char *pp_xstrdup(const char *str)
{
int len = strlen(str)+1;
return memcpy(pp_xmalloc(len), str, len);
}
char *wpp_lookup(const char *name, int type, const char *parent_name,
char **include_path, int include_path_count)
{
char *cpy;
char *cptr;
char *path;
const char *ccptr;
int i, fd;
cpy = pp_xmalloc(strlen(name)+1);
cptr = cpy;
for(ccptr = name; *ccptr; ccptr++)
{
/* Convert to forward slash */
if(*ccptr == '\\') {
/* kill double backslash */
if(ccptr[1] == '\\')
ccptr++;
*cptr = '/';
}else {
*cptr = *ccptr;
}
cptr++;
}
*cptr = '\0';
if(type && parent_name)
{
/* Search directory of parent include and then -I path */
const char *p;
if ((p = strrchr( parent_name, '/' ))) p++;
else p = parent_name;
path = pp_xmalloc( (p - parent_name) + strlen(cpy) + 1 );
memcpy( path, parent_name, p - parent_name );
strcpy( path + (p - parent_name), cpy );
fd = open( path, O_RDONLY );
if (fd != -1)
{
close( fd );
free( cpy );
return path;
}
free( path );
}
/* Search -I path */
for(i = 0; i < include_path_count; i++)
{
path = pp_xmalloc(strlen(include_path[i]) + strlen(cpy) + 2);
strcpy(path, include_path[i]);
strcat(path, "/");
strcat(path, cpy);
fd = open( path, O_RDONLY );
if (fd != -1)
{
close( fd );
free( cpy );
return path;
}
free( path );
}
free( cpy );
return NULL;
}
/* Don't comment on the hash, it's primitive but functional... */
static int pphash(const char *str)
{
int sum = 0;
while(*str)
sum += *str++;
return sum % HASHKEY;
}
pp_entry_t *pplookup(const char *ident)
{
int idx;
pp_entry_t *ppp;
if(!ident)
return NULL;
idx = pphash(ident);
LIST_FOR_EACH_ENTRY( ppp, &pp_defines[idx], pp_entry_t, entry )
{
if(!strcmp(ident, ppp->ident))
return ppp;
}
return NULL;
}
static void free_pp_entry( pp_entry_t *ppp, int idx )
{
if(ppp->iep)
{
list_remove( &ppp->iep->entry );
free(ppp->iep->filename);
free(ppp->iep);
}
list_remove( &ppp->entry );
free(ppp);
}
/* initialize the define state */
void pp_init_define_state(void)
{
int i;
for (i = 0; i < HASHKEY; i++) list_init( &pp_defines[i] );
}
/* free the current define state */
void pp_free_define_state(void)
{
int i;
pp_entry_t *ppp, *ppp2;
for (i = 0; i < HASHKEY; i++)
{
LIST_FOR_EACH_ENTRY_SAFE( ppp, ppp2, &pp_defines[i], pp_entry_t, entry )
{
free( ppp->ident );
free( ppp->subst.text );
free( ppp->filename );
free_pp_entry( ppp, i );
}
}
}
void pp_del_define(const char *name)
{
pp_entry_t *ppp;
int idx = pphash(name);
if((ppp = pplookup(name)) == NULL)
{
if(pp_status.pedantic)
ppy_warning("%s was not defined", name);
return;
}
if(pp_status.debug)
printf("Deleting (%s, %d) <%s>\n", pp_status.input, pp_status.line_number, name);
free( ppp->ident );
free( ppp->subst.text );
free( ppp->filename );
free_pp_entry( ppp, idx );
}
pp_entry_t *pp_add_define(const char *def, const char *text)
{
int len;
char *cptr;
int idx;
pp_entry_t *ppp;
idx = pphash(def);
if((ppp = pplookup(def)) != NULL)
{
if(pp_status.pedantic)
ppy_warning("Redefinition of %s\n\tPrevious definition: %s:%d", def, ppp->filename, ppp->linenumber);
pp_del_define(def);
}
ppp = pp_xmalloc(sizeof(pp_entry_t));
memset( ppp, 0, sizeof(*ppp) );
ppp->ident = pp_xstrdup(def);
ppp->type = def_define;
ppp->subst.text = text ? pp_xstrdup(text) : NULL;
ppp->filename = pp_xstrdup(pp_status.input ? pp_status.input : "<internal or cmdline>");
ppp->linenumber = pp_status.input ? pp_status.line_number : 0;
list_add_head( &pp_defines[idx], &ppp->entry );
if(ppp->subst.text)
{
/* Strip trailing white space from subst text */
len = strlen(ppp->subst.text);
while(len && strchr(" \t\r\n", ppp->subst.text[len-1]))
{
ppp->subst.text[--len] = '\0';
}
/* Strip leading white space from subst text */
for(cptr = ppp->subst.text; *cptr && strchr(" \t\r", *cptr); cptr++)
;
if(ppp->subst.text != cptr)
memmove(ppp->subst.text, cptr, strlen(cptr)+1);
}
if(pp_status.debug)
printf("Added define (%s, %d) <%s> to <%s>\n", pp_status.input, pp_status.line_number, ppp->ident, ppp->subst.text ? ppp->subst.text : "(null)");
return ppp;
}
pp_entry_t *pp_add_macro(char *id, char *args[], int nargs, mtext_t *exp)
{
int idx;
pp_entry_t *ppp;
idx = pphash(id);
if((ppp = pplookup(id)) != NULL)
{
if(pp_status.pedantic)
ppy_warning("Redefinition of %s\n\tPrevious definition: %s:%d", id, ppp->filename, ppp->linenumber);
pp_del_define(id);
}
ppp = pp_xmalloc(sizeof(pp_entry_t));
memset( ppp, 0, sizeof(*ppp) );
ppp->ident = id;
ppp->type = def_macro;
ppp->margs = args;
ppp->nargs = nargs;
ppp->subst.mtext= exp;
ppp->filename = pp_xstrdup(pp_status.input ? pp_status.input : "<internal or cmdline>");
ppp->linenumber = pp_status.input ? pp_status.line_number : 0;
list_add_head( &pp_defines[idx], &ppp->entry );
if(pp_status.debug)
{
fprintf(stderr, "Added macro (%s, %d) <%s(%d)> to <", pp_status.input, pp_status.line_number, ppp->ident, nargs);
for(; exp; exp = exp->next)
{
switch(exp->type)
{
case exp_text:
fprintf(stderr, " \"%s\" ", exp->subst.text);
break;
case exp_stringize:
fprintf(stderr, " #(%d) ", exp->subst.argidx);
break;
case exp_concat:
fprintf(stderr, "##");
break;
case exp_subst:
fprintf(stderr, " <%d> ", exp->subst.argidx);
break;
}
}
fprintf(stderr, ">\n");
}
return ppp;
}
/*
*-------------------------------------------------------------------------
* Include management
*-------------------------------------------------------------------------
*/
#if defined(_WIN32) || defined(__MSDOS__)
#define INCLUDESEPARATOR ";"
#else
#define INCLUDESEPARATOR ":"
#endif
static char **includepath;
static int nincludepath = 0;
void wpp_add_include_path(const char *path)
{
char *tok;
char *cpy = pp_xstrdup(path);
tok = strtok(cpy, INCLUDESEPARATOR);
while(tok)
{
if(*tok) {
char *dir;
char *cptr;
dir = pp_xstrdup(tok);
for(cptr = dir; *cptr; cptr++)
{
/* Convert to forward slash */
if(*cptr == '\\')
*cptr = '/';
}
/* Kill eventual trailing '/' */
if(*(cptr = dir + strlen(dir)-1) == '/')
*cptr = '\0';
/* Add to list */
includepath = pp_xrealloc(includepath, (nincludepath+1) * sizeof(*includepath));
includepath[nincludepath] = dir;
nincludepath++;
}
tok = strtok(NULL, INCLUDESEPARATOR);
}
free(cpy);
}
char *wpp_find_include(const char *name, const char *parent_name)
{
return wpp_lookup(name, !!parent_name, parent_name, includepath, nincludepath);
}
void *pp_open_include(const char *name, int type, const char *parent_name, char **newpath)
{
char *path;
void *fp;
if (!(path = wpp_lookup(name, type, parent_name, includepath, nincludepath))) return NULL;
fp = fopen(path, "rt");
if (fp)
{
if (pp_status.debug)
printf("Going to include <%s>\n", path);
if (newpath) *newpath = path;
else free( path );
return fp;
}
free( path );
return NULL;
}
/*
*-------------------------------------------------------------------------
* #if, #ifdef, #ifndef, #else, #elif and #endif state management
*
* #if state transitions are made on basis of the current TOS and the next
* required state. The state transitions are required to housekeep because
* #if:s can be nested. The ignore case is activated to prevent output from
* within a false clause.
* Some special cases come from the fact that the #elif cases are not
* binary, but three-state. The problem is that all other elif-cases must
* be false when one true one has been found. A second problem is that the
* #else clause is a final clause. No extra #else:s may follow.
*
* The states mean:
* if_true Process input to output
* if_false Process input but no output
* if_ignore Process input but no output
* if_elif Process input but no output
* if_elsefalse Process input but no output
* if_elsettrue Process input to output
*
* The possible state-sequences are [state(stack depth)] (rest can be deduced):
* TOS #if 1 #else #endif
* if_true(n) if_true(n+1) if_elsefalse(n+1)
* if_false(n) if_ignore(n+1) if_ignore(n+1)
* if_elsetrue(n) if_true(n+1) if_elsefalse(n+1)
* if_elsefalse(n) if_ignore(n+1) if_ignore(n+1)
* if_elif(n) if_ignore(n+1) if_ignore(n+1)
* if_ignore(n) if_ignore(n+1) if_ignore(n+1)
*
* TOS #if 1 #elif 0 #else #endif
* if_true(n) if_true(n+1) if_elif(n+1) if_elif(n+1)
* if_false(n) if_ignore(n+1) if_ignore(n+1) if_ignore(n+1)
* if_elsetrue(n) if_true(n+1) if_elif(n+1) if_elif(n+1)
* if_elsefalse(n) if_ignore(n+1) if_ignore(n+1) if_ignore(n+1)
* if_elif(n) if_ignore(n+1) if_ignore(n+1) if_ignore(n+1)
* if_ignore(n) if_ignore(n+1) if_ignore(n+1) if_ignore(n+1)
*
* TOS #if 0 #elif 1 #else #endif
* if_true(n) if_false(n+1) if_true(n+1) if_elsefalse(n+1)
* if_false(n) if_ignore(n+1) if_ignore(n+1) if_ignore(n+1)
* if_elsetrue(n) if_false(n+1) if_true(n+1) if_elsefalse(n+1)
* if_elsefalse(n) if_ignore(n+1) if_ignore(n+1) if_ignore(n+1)
* if_elif(n) if_ignore(n+1) if_ignore(n+1) if_ignore(n+1)
* if_ignore(n) if_ignore(n+1) if_ignore(n+1) if_ignore(n+1)
*
*-------------------------------------------------------------------------
*/
static const char * const pp_if_state_str[] = {
"if_false",
"if_true",
"if_elif",
"if_elsefalse",
"if_elsetrue",
"if_ignore"
};
void pp_push_if(pp_if_state_t s)
{
if(if_stack_idx >= MAXIFSTACK)
pp_internal_error(__FILE__, __LINE__, "#if-stack overflow; #{if,ifdef,ifndef} nested too deeply (> %d)", MAXIFSTACK);
if(pp_flex_debug)
fprintf(stderr, "Push if %s:%d: %s(%d) -> %s(%d)\n", pp_status.input, pp_status.line_number, pp_if_state_str[pp_if_state()], if_stack_idx, pp_if_state_str[s], if_stack_idx+1);
if_stack[if_stack_idx++] = s;
switch(s)
{
case if_true:
case if_elsetrue:
break;
case if_false:
case if_elsefalse:
case if_elif:
case if_ignore:
pp_push_ignore_state();
break;
default:
pp_internal_error(__FILE__, __LINE__, "Invalid pp_if_state (%d)", (int)pp_if_state());
}
}
pp_if_state_t pp_pop_if(void)
{
if(if_stack_idx <= 0)
{
ppy_error("#{endif,else,elif} without #{if,ifdef,ifndef} (#if-stack underflow)");
return if_error;
}
switch(pp_if_state())
{
case if_true:
case if_elsetrue:
break;
case if_false:
case if_elsefalse:
case if_elif:
case if_ignore:
pp_pop_ignore_state();
break;
default:
pp_internal_error(__FILE__, __LINE__, "Invalid pp_if_state (%d)", (int)pp_if_state());
}
if(pp_flex_debug)
fprintf(stderr, "Pop if %s:%d: %s(%d) -> %s(%d)\n",
pp_status.input,
pp_status.line_number,
pp_if_state_str[pp_if_state()],
if_stack_idx,
pp_if_state_str[if_stack[if_stack_idx <= 1 ? if_true : if_stack_idx-2]],
if_stack_idx-1);
return if_stack[--if_stack_idx];
}
pp_if_state_t pp_if_state(void)
{
if(!if_stack_idx)
return if_true;
else
return if_stack[if_stack_idx-1];
}
void pp_next_if_state(int i)
{
switch(pp_if_state())
{
case if_true:
case if_elsetrue:
pp_push_if(i ? if_true : if_false);
break;
case if_false:
case if_elsefalse:
case if_elif:
case if_ignore:
pp_push_if(if_ignore);
break;
default:
pp_internal_error(__FILE__, __LINE__, "Invalid pp_if_state (%d) in #{if,ifdef,ifndef} directive", (int)pp_if_state());
}
}
int pp_get_if_depth(void)
{
return if_stack_idx;
}
static void generic_msg(const char *s, const char *t, const char *n, va_list ap)
{
fprintf(stderr, "%s:%d:%d: %s: ", pp_status.input ? pp_status.input : "stdin",
pp_status.line_number, pp_status.char_number, t);
vfprintf(stderr, s, ap);
fprintf(stderr, "\n");
}
int ppy_error(const char *s, ...)
{
va_list ap;
va_start(ap, s);
generic_msg(s, "error", ppy_text, ap);
va_end(ap);
exit(1);
}
int ppy_warning(const char *s, ...)
{
va_list ap;
va_start(ap, s);
generic_msg(s, "warning", ppy_text, ap);
va_end(ap);
return 0;
}
void pp_internal_error(const char *file, int line, const char *s, ...)
{
va_list ap;
va_start(ap, s);
fprintf(stderr, "Internal error (please report) %s %d: ", file, line);
vfprintf(stderr, s, ap);
fprintf(stderr, "\n");
va_end(ap);
exit(3);
}
static void add_cmdline_defines(void)
{
struct define *def;
LIST_FOR_EACH_ENTRY( def, &cmdline_defines, struct define, entry )
{
if (def->value) pp_add_define( def->name, def->value );
}
}
static void add_special_defines(void)
{
time_t now = time(NULL);
pp_entry_t *ppp;
char buf[32];
strftime(buf, sizeof(buf), "\"%b %d %Y\"", localtime(&now));
pp_add_define( "__DATE__", buf );
strftime(buf, sizeof(buf), "\"%H:%M:%S\"", localtime(&now));
pp_add_define( "__TIME__", buf );
ppp = pp_add_define( "__FILE__", "" );
ppp->type = def_special;
ppp = pp_add_define( "__LINE__", "" );
ppp->type = def_special;
}
/* add a define to the preprocessor list */
static void wpp_add_define( const char *name, const char *value )
{
struct define *def;
if (!value) value = "";
LIST_FOR_EACH_ENTRY( def, &cmdline_defines, struct define, entry )
{
if (!strcmp( def->name, name ))
{
free( def->value );
def->value = pp_xstrdup(value);
return;
}
}
def = pp_xmalloc( sizeof(*def) );
def->name = pp_xstrdup(name);
def->value = pp_xstrdup(value);
list_add_head( &cmdline_defines, &def->entry );
}
/* undefine a previously added definition */
void wpp_del_define( const char *name )
{
struct define *def;
LIST_FOR_EACH_ENTRY( def, &cmdline_defines, struct define, entry )
{
if (!strcmp( def->name, name ))
{
free( def->value );
def->value = NULL;
return;
}
}
}
/* add a command-line define of the form NAME=VALUE */
void wpp_add_cmdline_define( const char *value )
{
char *p;
char *str = pp_xstrdup(value);
p = strchr( str, '=' );
if (p) *p++ = 0;
wpp_add_define( str, p );
free( str );
}
/* set the various debug flags */
void wpp_set_debug( int lex_debug, int parser_debug, int msg_debug )
{
pp_flex_debug = lex_debug;
ppy_debug = parser_debug;
pp_status.debug = msg_debug;
}
/* set the pedantic mode */
void wpp_set_pedantic( int on )
{
pp_status.pedantic = on;
}
/* the main preprocessor parsing loop */
int wpp_parse( const char *input, FILE *output )
{
int ret;
pp_status.input = NULL;
pp_status.line_number = 1;
pp_status.char_number = 1;
pp_init_define_state();
add_cmdline_defines();
add_special_defines();
if (!input) pp_status.file = stdin;
else if (!(pp_status.file = fopen(input, "rt")))
ppy_error("Could not open %s\n", input);
pp_status.input = input ? pp_xstrdup(input) : NULL;
ppy_out = output;
pp_writestring("# 1 \"%s\" 1\n", input ? input : "");
ret = ppy_parse();
if (input)
{
fclose(pp_status.file);
free(pp_status.input);
}
/* Clean if_stack, it could remain dirty on errors */
while (pp_get_if_depth()) pp_pop_if();
pp_free_define_state();
return ret;
}
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