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git://source.winehq.org/git/wine.git
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![Brendan Shanks](/assets/img/avatar_default.png)
Signed-off-by: Brendan Shanks <bshanks@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>
643 lines
15 KiB
C
643 lines
15 KiB
C
/*
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* Exported functions of the Wine preprocessor
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*
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* Copyright 1998 Bertho A. Stultiens
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* Copyright 2002 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#include <assert.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#include <time.h>
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#include "../tools.h"
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#include "utils.h"
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#include "wpp_private.h"
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struct pp_status pp_status;
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#define HASHKEY 2039
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static struct list pp_defines[HASHKEY];
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#define MAXIFSTACK 64
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static pp_if_state_t if_stack[MAXIFSTACK];
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static int if_stack_idx = 0;
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int ppy_debug, pp_flex_debug;
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struct define
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{
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struct list entry;
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char *name;
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char *value;
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};
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static struct list cmdline_defines = LIST_INIT( cmdline_defines );
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static struct strarray includes;
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static char *wpp_lookup(const char *name, int type, const char *parent_name)
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{
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char *cpy;
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char *cptr;
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char *path;
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const char *ccptr;
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int i, fd;
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cpy = xmalloc(strlen(name)+1);
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cptr = cpy;
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for(ccptr = name; *ccptr; ccptr++)
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{
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/* Convert to forward slash */
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if(*ccptr == '\\') {
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/* kill double backslash */
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if(ccptr[1] == '\\')
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ccptr++;
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*cptr = '/';
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}else {
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*cptr = *ccptr;
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}
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cptr++;
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}
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*cptr = '\0';
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if(type && parent_name)
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{
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/* Search directory of parent include and then -I path */
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path = strmake( "%s/%s", get_dirname(parent_name), cpy );
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fd = open( path, O_RDONLY );
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if (fd != -1)
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{
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close( fd );
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free( cpy );
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return path;
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}
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free( path );
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}
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/* Search -I path */
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for(i = 0; i < includes.count; i++)
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{
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path = strmake("%s/%s", includes.str[i], cpy);
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fd = open( path, O_RDONLY );
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if (fd != -1)
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{
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close( fd );
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free( cpy );
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return path;
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}
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free( path );
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}
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free( cpy );
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return NULL;
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}
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/* Don't comment on the hash, it's primitive but functional... */
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static int pphash(const char *str)
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{
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int sum = 0;
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while(*str)
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sum += *str++;
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return sum % HASHKEY;
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}
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pp_entry_t *pplookup(const char *ident)
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{
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int idx;
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pp_entry_t *ppp;
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if(!ident)
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return NULL;
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idx = pphash(ident);
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LIST_FOR_EACH_ENTRY( ppp, &pp_defines[idx], pp_entry_t, entry )
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{
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if(!strcmp(ident, ppp->ident))
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return ppp;
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}
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return NULL;
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}
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static void free_pp_entry( pp_entry_t *ppp, int idx )
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{
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if(ppp->iep)
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{
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list_remove( &ppp->iep->entry );
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free(ppp->iep->filename);
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free(ppp->iep);
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}
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list_remove( &ppp->entry );
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free(ppp);
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}
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/* initialize the define state */
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static void pp_init_define_state(void)
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{
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int i;
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for (i = 0; i < HASHKEY; i++) list_init( &pp_defines[i] );
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}
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/* free the current define state */
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static void pp_free_define_state(void)
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{
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int i;
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pp_entry_t *ppp, *ppp2;
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for (i = 0; i < HASHKEY; i++)
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{
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LIST_FOR_EACH_ENTRY_SAFE( ppp, ppp2, &pp_defines[i], pp_entry_t, entry )
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{
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free( ppp->ident );
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free( ppp->subst.text );
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free( ppp->filename );
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free_pp_entry( ppp, i );
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}
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}
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}
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void pp_del_define(const char *name)
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{
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pp_entry_t *ppp;
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int idx = pphash(name);
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if((ppp = pplookup(name)) == NULL)
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{
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if(pedantic)
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ppy_warning("%s was not defined", name);
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return;
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}
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if(pp_status.debug)
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printf("Deleting (%s, %d) <%s>\n", pp_status.input, pp_status.line_number, name);
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free( ppp->ident );
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free( ppp->subst.text );
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free( ppp->filename );
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free_pp_entry( ppp, idx );
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}
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pp_entry_t *pp_add_define(const char *def, const char *text)
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{
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int len;
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char *cptr;
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int idx;
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pp_entry_t *ppp;
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idx = pphash(def);
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if((ppp = pplookup(def)) != NULL)
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{
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if(pedantic)
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ppy_warning("Redefinition of %s\n%s:%d: note: previous definition was here",
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def, ppp->filename, ppp->linenumber);
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pp_del_define(def);
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}
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ppp = xmalloc(sizeof(pp_entry_t));
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memset( ppp, 0, sizeof(*ppp) );
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ppp->ident = xstrdup(def);
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ppp->type = def_define;
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ppp->subst.text = text ? xstrdup(text) : NULL;
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ppp->filename = xstrdup(pp_status.input ? pp_status.input : "<internal or cmdline>");
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ppp->linenumber = pp_status.input ? pp_status.line_number : 0;
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list_add_head( &pp_defines[idx], &ppp->entry );
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if(ppp->subst.text)
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{
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/* Strip trailing white space from subst text */
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len = strlen(ppp->subst.text);
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while(len && strchr(" \t\r\n", ppp->subst.text[len-1]))
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{
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ppp->subst.text[--len] = '\0';
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}
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/* Strip leading white space from subst text */
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for(cptr = ppp->subst.text; *cptr && strchr(" \t\r", *cptr); cptr++)
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;
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if(ppp->subst.text != cptr)
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memmove(ppp->subst.text, cptr, strlen(cptr)+1);
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}
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if(pp_status.debug)
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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)");
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return ppp;
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}
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pp_entry_t *pp_add_macro(char *id, char *args[], int nargs, int variadic, mtext_t *exp)
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{
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int idx;
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pp_entry_t *ppp;
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idx = pphash(id);
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if((ppp = pplookup(id)) != NULL)
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{
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if(pedantic)
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ppy_warning("Redefinition of %s\n%s:%d: note: previous definition was here",
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id, ppp->filename, ppp->linenumber);
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pp_del_define(id);
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}
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ppp = xmalloc(sizeof(pp_entry_t));
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memset( ppp, 0, sizeof(*ppp) );
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ppp->ident = id;
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ppp->type = def_macro;
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ppp->margs = args;
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ppp->nargs = nargs;
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ppp->variadic = variadic;
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ppp->subst.mtext= exp;
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ppp->filename = xstrdup(pp_status.input ? pp_status.input : "<internal or cmdline>");
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ppp->linenumber = pp_status.input ? pp_status.line_number : 0;
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list_add_head( &pp_defines[idx], &ppp->entry );
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if(pp_status.debug)
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{
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fprintf(stderr, "Added macro (%s, %d) <%s(%d%s)> to <", pp_status.input, pp_status.line_number, ppp->ident, nargs, variadic ? ",va" : "");
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for(; exp; exp = exp->next)
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{
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switch(exp->type)
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{
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case exp_text:
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fprintf(stderr, " \"%s\" ", exp->subst.text);
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break;
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case exp_stringize:
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fprintf(stderr, " #(%d) ", exp->subst.argidx);
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break;
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case exp_concat:
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fprintf(stderr, "##");
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break;
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case exp_subst:
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fprintf(stderr, " <%d> ", exp->subst.argidx);
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break;
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}
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}
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fprintf(stderr, ">\n");
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}
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return ppp;
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}
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/*
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*-------------------------------------------------------------------------
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* Include management
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*-------------------------------------------------------------------------
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*/
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void wpp_add_include_path(const char *path)
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{
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char *dir = xstrdup(path);
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char *cptr;
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for(cptr = dir; *cptr; cptr++)
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{
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/* Convert to forward slash */
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if(*cptr == '\\')
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*cptr = '/';
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}
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/* Kill eventual trailing '/' */
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if(*(cptr = dir + strlen(dir)-1) == '/') *cptr = '\0';
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strarray_add( &includes, dir );
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}
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char *wpp_find_include(const char *name, const char *parent_name)
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{
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return wpp_lookup(name, !!parent_name, parent_name);
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}
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void *pp_open_include(const char *name, int type, const char *parent_name, char **newpath)
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{
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char *path;
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void *fp;
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if (!(path = wpp_lookup(name, type, parent_name))) return NULL;
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fp = fopen(path, "rt");
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if (fp)
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{
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if (pp_status.debug)
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printf("Going to include <%s>\n", path);
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if (newpath) *newpath = path;
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else free( path );
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return fp;
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}
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free( path );
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return NULL;
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}
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/*
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*-------------------------------------------------------------------------
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* #if, #ifdef, #ifndef, #else, #elif and #endif state management
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*
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* #if state transitions are made on basis of the current TOS and the next
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* required state. The state transitions are required to housekeep because
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* #if:s can be nested. The ignore case is activated to prevent output from
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* within a false clause.
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* Some special cases come from the fact that the #elif cases are not
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* binary, but three-state. The problem is that all other elif-cases must
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* be false when one true one has been found. A second problem is that the
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* #else clause is a final clause. No extra #else:s may follow.
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*
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* The states mean:
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* if_true Process input to output
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* if_false Process input but no output
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* if_ignore Process input but no output
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* if_elif Process input but no output
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* if_elsefalse Process input but no output
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* if_elsettrue Process input to output
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*
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* The possible state-sequences are [state(stack depth)] (rest can be deduced):
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* TOS #if 1 #else #endif
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* if_true(n) if_true(n+1) if_elsefalse(n+1)
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* if_false(n) if_ignore(n+1) if_ignore(n+1)
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* if_elsetrue(n) if_true(n+1) if_elsefalse(n+1)
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* if_elsefalse(n) if_ignore(n+1) if_ignore(n+1)
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* if_elif(n) if_ignore(n+1) if_ignore(n+1)
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* if_ignore(n) if_ignore(n+1) if_ignore(n+1)
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*
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* TOS #if 1 #elif 0 #else #endif
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* if_true(n) if_true(n+1) if_elif(n+1) if_elif(n+1)
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* if_false(n) if_ignore(n+1) if_ignore(n+1) if_ignore(n+1)
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* if_elsetrue(n) if_true(n+1) if_elif(n+1) if_elif(n+1)
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* if_elsefalse(n) if_ignore(n+1) if_ignore(n+1) if_ignore(n+1)
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* if_elif(n) if_ignore(n+1) if_ignore(n+1) if_ignore(n+1)
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* if_ignore(n) if_ignore(n+1) if_ignore(n+1) if_ignore(n+1)
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*
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* TOS #if 0 #elif 1 #else #endif
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* if_true(n) if_false(n+1) if_true(n+1) if_elsefalse(n+1)
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* if_false(n) if_ignore(n+1) if_ignore(n+1) if_ignore(n+1)
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* if_elsetrue(n) if_false(n+1) if_true(n+1) if_elsefalse(n+1)
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* if_elsefalse(n) if_ignore(n+1) if_ignore(n+1) if_ignore(n+1)
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* if_elif(n) if_ignore(n+1) if_ignore(n+1) if_ignore(n+1)
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* if_ignore(n) if_ignore(n+1) if_ignore(n+1) if_ignore(n+1)
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*
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*-------------------------------------------------------------------------
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*/
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static const char * const pp_if_state_str[] = {
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"if_false",
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"if_true",
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"if_elif",
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"if_elsefalse",
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"if_elsetrue",
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"if_ignore"
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};
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void pp_push_if(pp_if_state_t s)
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{
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if(if_stack_idx >= MAXIFSTACK)
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error("#if-stack overflow; #{if,ifdef,ifndef} nested too deeply (> %d)\n", MAXIFSTACK);
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if(pp_flex_debug)
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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);
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if_stack[if_stack_idx++] = s;
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switch(s)
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{
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case if_true:
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case if_elsetrue:
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break;
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case if_false:
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case if_elsefalse:
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case if_elif:
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case if_ignore:
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pp_push_ignore_state();
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break;
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case if_error:
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assert(0);
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}
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}
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pp_if_state_t pp_pop_if(void)
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{
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if(if_stack_idx <= 0)
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{
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ppy_error("#{endif,else,elif} without #{if,ifdef,ifndef} (#if-stack underflow)");
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return if_error;
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}
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switch(pp_if_state())
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{
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case if_true:
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case if_elsetrue:
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break;
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case if_false:
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case if_elsefalse:
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case if_elif:
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case if_ignore:
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pp_pop_ignore_state();
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break;
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case if_error:
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assert(0);
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}
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if(pp_flex_debug)
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fprintf(stderr, "Pop if %s:%d: %s(%d) -> %s(%d)\n",
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pp_status.input,
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pp_status.line_number,
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pp_if_state_str[pp_if_state()],
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if_stack_idx,
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pp_if_state_str[if_stack[if_stack_idx <= 1 ? if_true : if_stack_idx-2]],
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if_stack_idx-1);
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return if_stack[--if_stack_idx];
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}
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pp_if_state_t pp_if_state(void)
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{
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if(!if_stack_idx)
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return if_true;
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else
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return if_stack[if_stack_idx-1];
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}
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void pp_next_if_state(int i)
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{
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switch(pp_if_state())
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{
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case if_true:
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case if_elsetrue:
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pp_push_if(i ? if_true : if_false);
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break;
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case if_false:
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case if_elsefalse:
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case if_elif:
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case if_ignore:
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pp_push_if(if_ignore);
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break;
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case if_error:
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assert(0);
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}
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}
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int pp_get_if_depth(void)
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{
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return if_stack_idx;
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}
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static void generic_msg(const char *s, const char *t, const char *n, va_list ap)
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{
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fprintf(stderr, "%s:%d:%d: %s: ", pp_status.input ? pp_status.input : "stdin",
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pp_status.line_number, pp_status.char_number, t);
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vfprintf(stderr, s, ap);
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fprintf(stderr, "\n");
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}
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int ppy_error(const char *s, ...)
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{
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va_list ap;
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va_start(ap, s);
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generic_msg(s, "error", ppy_text, ap);
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va_end(ap);
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exit(1);
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}
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int ppy_warning(const char *s, ...)
|
|
{
|
|
va_list ap;
|
|
va_start(ap, s);
|
|
generic_msg(s, "warning", ppy_text, ap);
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|
va_end(ap);
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|
return 0;
|
|
}
|
|
|
|
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 = xstrdup(value);
|
|
return;
|
|
}
|
|
}
|
|
|
|
def = xmalloc( sizeof(*def) );
|
|
def->name = xstrdup(name);
|
|
def->value = 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 = 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;
|
|
}
|
|
|
|
|
|
/* 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 ? xstrdup(input) : NULL;
|
|
|
|
ppy_out = output;
|
|
fprintf(ppy_out, "# 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;
|
|
}
|