diff --git a/Makefile b/Makefile
index 82e64b3..f62105f 100644
--- a/Makefile
+++ b/Makefile
@@ -22,6 +22,7 @@ dist:
 	$(LN) . $(PACKAGE)-$(VERSION)
 	@$(TAR) $(PACKAGE)-$(VERSION).tar.gz \
 		$(PACKAGE)-$(VERSION)/src/c99.c \
+		$(PACKAGE)-$(VERSION)/src/main.c \
 		$(PACKAGE)-$(VERSION)/src/tokenset.c \
 		$(PACKAGE)-$(VERSION)/src/c99.h \
 		$(PACKAGE)-$(VERSION)/src/tokenset.h \
diff --git a/src/Makefile b/src/Makefile
index fc28350..69cbd61 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -14,7 +14,7 @@ INSTALL	= install
 
 all: $(TARGETS)
 
-c99_OBJS = c99.o tokenset.o
+c99_OBJS = c99.o main.o tokenset.o
 c99_CFLAGS = $(CPPFLAGS) $(CFLAGSF) $(CFLAGS)
 
 c99: $(c99_OBJS)
@@ -23,6 +23,9 @@ c99: $(c99_OBJS)
 c99.o: c99.c c99.h tokenset.h
 	$(CC) $(c99_CFLAGS) -c c99.c
 
+main.o: main.c c99.h
+	$(CC) $(c99_CFLAGS) -c main.c
+
 tokenset.o: tokenset.c c99.h tokenset.h
 	$(CC) $(c99_CFLAGS) -c tokenset.c
 
diff --git a/src/c99.c b/src/c99.c
index 31e4df0..814124b 100644
--- a/src/c99.c
+++ b/src/c99.c
@@ -13,8 +13,6 @@
  * You should have received a copy of the Creative Commons Attribution-
  * NonCommercial-ShareAlike 3.0 along with c99; if not, browse to
  * http://creativecommons.org/licenses/by-nc-sa/3.0/ */
-/* FIXME:
- * - place main() in main.c? */
 
 
 
@@ -25,27 +23,18 @@
 #include <errno.h>
 #include "tokenset.h"
 #include "c99.h"
-#include "../config.h"
 
 
 /* private */
 /* types */
-typedef struct _Prefs
+struct _C99
 {
-	int flags;
-	char const * outfile;
-	const char ** paths;
-	size_t paths_cnt;
-	char ** defines;
-	size_t defines_cnt;
-	const char ** undefines;
-	size_t undefines_cnt;
+	int flags;			/* FIXME get rid of it */
+	FILE * outfp;
+	Cpp * cpp;
+	char * outfile;
 	int optlevel;
-} Prefs;
-#define PREFS_c 0x1
-#define PREFS_E 0x2
-#define PREFS_g 0x4
-#define PREFS_s 0x8
+};
 
 typedef struct _C99Operator
 {
@@ -54,10 +43,6 @@ typedef struct _C99Operator
 } C99Operator;
 
 
-/* prototypes */
-static int _c99(Prefs * prefs, int filec, char * filev[]);
-
-
 /* variables */
 static C99Operator _operators[] =
 {
@@ -102,105 +87,122 @@ static C99Operator _operators[] =
 static size_t _operators_cnt = sizeof(_operators) / sizeof(*_operators);
 
 
+/* public */
 /* functions */
-/* c99 */
-static int _c99_do(Prefs * prefs, FILE * outfp, char const * infile);
+/* c99_new */
+static char * _new_outfile(int flags, char const * outfile,
+		char const * pathname);
 
-static int _c99(Prefs * prefs, int filec, char * filev[])
+C99 * c99_new(C99Prefs * prefs, char const * pathname)
 {
-	FILE * fp = stdout;
-	int ret = 0;
-	int i;
-
-	if(prefs->outfile != NULL && (fp = fopen(prefs->outfile, "w")) == NULL)
-		return error_set_print(PACKAGE, 1, "%s: %s", prefs->outfile,
-				strerror(errno));
-	for(i = 0; i < filec; i++)
-		ret |= _c99_do(prefs, fp, filev[i]);
-	if(fp != NULL && fclose(fp) != 0)
-		return error_set_print(PACKAGE, 1, "%s: %s", prefs->outfile,
-				strerror(errno));
-	if(ret != 0)
-		error_print(PACKAGE);
-	return ret;
-}
-
-static int _c99_do_c(Prefs * prefs, FILE * outfp, char const * infile);
-static int _c99_do_E(Prefs * prefs, FILE * outfp, char const * infile);
-static int _c99_do_o(Prefs * prefs, FILE * outfp, char const * infile);
-static int _c99_do(Prefs * prefs, FILE * outfp, char const * infile)
-{
-	if(prefs->flags & PREFS_c)
-		return _c99_do_c(prefs, outfp, infile);
-	else if(prefs->flags & PREFS_E)
-		return _c99_do_E(prefs, outfp, infile);
-	else
-		return _c99_do_o(prefs, outfp, infile);
-}
-
-static int _c99_do_c(Prefs * prefs, FILE * outfp, char const * infile)
-{
-	int ret = 0;
-	size_t len;
-	char * o = NULL;
-	Cpp * cpp;
-
-	if(prefs->outfile == NULL)
-	{
-		if((len = strlen(infile)) < 3 || infile[len - 2] != '.'
-				|| infile[len - 1] != 'c')
-			return error_set_code(1, "%s", strerror(EINVAL));
-		if((o = strdup(infile)) == NULL)
-			return error_set_code(1, "%s", strerror(errno));
-		o[len - 1] = 'o';
-		if((outfp = fopen(o, "w")) == NULL)
-		{
-			error_set_code(1, "%s: %s", o, strerror(errno));
-			free(o);
-			return 1;
-		}
-	}
-	if((cpp = cpp_new(infile, CPP_FILTER_TRIGRAPH)) == NULL)
-		ret = 1;
-	else
-		ret = c99_parse(cpp, C99_PARSER_MODE_OBJECT);
-	if(o != NULL)
-	{
-		if(fclose(outfp) != 0)
-			ret = error_set_code(1, "%s: %s", o, strerror(errno));
-		free(o);
-	}
-	return ret;
-}
-
-static int _c99_do_E(Prefs * prefs, FILE * outfp, char const * infile)
-{
-	int ret;
-	Cpp * cpp;
+	C99 * c99;
 	size_t i;
 	size_t j;
 	size_t k;
+
+	if((c99 = object_new(sizeof(*c99))) == NULL)
+		return NULL;
+	c99->flags = prefs->flags;
+	if((c99->cpp = cpp_new(pathname, CPP_FILTER_TRIGRAPH)) == NULL)
+	{
+		object_delete(c99);
+		return NULL;
+	}
+	for(i = 0; i < prefs->paths_cnt; i++)
+		if(cpp_path_add(c99->cpp, prefs->paths[i]) != 0)
+			break;
+	for(j = 0; j < prefs->defines_cnt; j++)
+		if(cpp_define_add(c99->cpp, prefs->defines[j], NULL) != 0)
+			break;
+	for(k = 0; k < prefs->undefines_cnt; k++)
+		if(cpp_define_remove(c99->cpp, prefs->undefines[k]) != 0)
+			break;
+	c99->outfile = _new_outfile(prefs->flags, prefs->outfile, pathname);
+	if(c99->outfile != NULL)
+		c99->outfp = (c99->outfile[0] == '\0') ? stdout
+			: fopen(c99->outfile, "w");
+	else
+		c99->outfp = NULL;
+	c99->optlevel = prefs->optlevel;
+	if(c99->outfile == NULL
+			|| c99->outfp == NULL
+			|| i != prefs->paths_cnt
+			|| j != prefs->defines_cnt
+			|| k != prefs->undefines_cnt)
+	{
+		c99_delete(c99);
+		return NULL;
+	}
+	return c99;
+}
+
+static char * _new_outfile(int flags, char const * outfile,
+		char const * pathname)
+{
+	char * ret;
+	size_t len;
+
+	if(flags & C99PREFS_c && pathname != NULL)
+	{
+		if((len = strlen(pathname)) < 3 || pathname[len - 2] != '.'
+				|| pathname[len - 1] != 'c')
+		{
+			error_set_code(1, "%s", strerror(EINVAL));
+			return NULL;
+		}
+		if((ret = strdup(pathname)) == NULL)
+		{
+			error_set_code(1, "%s", strerror(errno));
+			return NULL;
+		}
+		ret[len - 1] = 'o';
+		return ret;
+	}
+	if(flags & C99PREFS_E && outfile == NULL)
+		outfile = "";
+	if((ret = strdup(outfile != NULL ? outfile : "a.out")) == NULL)
+	{
+		error_set_code(1, "%s", strerror(errno));
+		return NULL;
+	}
+	return ret;
+}
+
+
+/* c99_delete */
+int c99_delete(C99 * c99)
+{
+	int ret = 0;
+
+	cpp_delete(c99->cpp);
+	if(c99->outfp != NULL && fclose(c99->outfp) != 0)
+		ret = error_set_code(1, "%s: %s", c99->outfile,
+				strerror(errno));
+	free(c99->outfile);
+	object_delete(c99);
+	return ret;
+}
+
+
+/* useful */
+/* c99_parse */
+static int _parse_E(C99 * c99);
+
+int c99_parse(C99 * c99)
+{
+	if(c99->flags & C99PREFS_E)
+		return _parse_E(c99);
+	/* FIXME implement */
+	return error_set_code(1, "%s", strerror(ENOSYS));
+}
+
+static int _parse_E(C99 * c99)
+{
+	int ret;
 	Token * token;
 	int code;
 
-	if((cpp = cpp_new(infile, CPP_FILTER_TRIGRAPH)) == NULL)
-		return 1;
-	for(i = 0; i < prefs->paths_cnt; i++)
-		if(cpp_path_add(cpp, prefs->paths[i]) != 0)
-			break;
-	for(j = 0; j < prefs->defines_cnt; j++)
-		if(cpp_define_add(cpp, prefs->defines[j], NULL) != 0)
-			break;
-	for(k = 0; k < prefs->undefines_cnt; k++)
-		if(cpp_define_remove(cpp, prefs->undefines[k]) != 0)
-			break;
-	if(i != prefs->paths_cnt || j != prefs->defines_cnt
-			|| k != prefs->undefines_cnt)
-	{
-		cpp_delete(cpp);
-		return 1;
-	}
-	while((ret = cpp_scan(cpp, &token)) == 0
+	while((ret = cpp_scan(c99->cpp, &token)) == 0
 			&& token != NULL)
 	{
 		if((code = token_get_code(token)) == CPP_CODE_META_ERROR
@@ -213,34 +215,14 @@ static int _c99_do_E(Prefs * prefs, FILE * outfp, char const * infile)
 					token_get_string(token));
 		else if(code >= CPP_CODE_META_FIRST
 				&& code <= CPP_CODE_META_LAST)
-			fprintf(outfp, "%s\n", token_get_string(token));
+			fprintf(c99->outfp, "%s\n", token_get_string(token));
 		else
-			fputs(token_get_string(token), outfp);
+			fputs(token_get_string(token), c99->outfp);
+		token_delete(token);
 	}
-	cpp_delete(cpp);
 	return ret;
 }
 
-static int _c99_do_o(Prefs * prefs, FILE * outfp, char const * infile)
-{
-	int ret;
-	Cpp * cpp;
-
-	if((cpp = cpp_new(infile, CPP_FILTER_TRIGRAPH)) == NULL)
-		ret = 1;
-	else
-		ret = c99_parse(cpp, C99_PARSER_MODE_OBJECT);
-	return ret;
-}
-
-
-/* useful */
-/* c99_parse */
-int c99_parse(C99 * c99, C99ParserMode mode)
-{
-	return error_set_code(1, "%s", strerror(ENOSYS));
-}
-
 
 /* c99_scan */
 int c99_scan(C99 * c99, Token ** token)
@@ -249,7 +231,7 @@ int c99_scan(C99 * c99, Token ** token)
 	char const * string;
 	size_t i;
 
-	if((ret = cpp_scan(c99, token)) != 0)
+	if((ret = cpp_scan(c99->cpp, token)) != 0)
 		return ret;
 	if(token == NULL)
 		return 0;
@@ -265,115 +247,3 @@ int c99_scan(C99 * c99, Token ** token)
 		}
 	return 0;
 }
-
-
-/* usage */
-static int _usage(void)
-{
-	fputs("Usage: c99 [-c][-D name[=value]]...[-E][-g][-I directory]"
-"[-L directory][-o outfile][-Ooptlevel][-s][-U name]... operand ...\n", stderr);
-	return 1;
-}
-
-
-/* public */
-/* main */
-static int _main_add_define(Prefs * prefs, char * define);
-static int _main_add_path(Prefs * prefs, char const * path);
-static int _main_add_undefine(Prefs * prefs, char const * undefine);
-
-int main(int argc, char * argv[])
-{
-	Prefs prefs;
-	int o;
-
-	memset(&prefs, 0, sizeof(prefs));
-	while((o = getopt(argc, argv, "cD:EgI:L:o:O123sU:")) != -1)
-		switch(o)
-		{
-			case 'c':
-				prefs.flags |= PREFS_c;
-				break;
-			case 'D':
-				if(_main_add_define(&prefs, optarg) != 0)
-					return 2;
-				break;
-			case 'E':
-				prefs.flags |= PREFS_E;
-				break;
-			case 'I':
-				if(_main_add_path(&prefs, optarg) != 0)
-					return 2;
-				break;
-			case 'g':
-				prefs.flags |= PREFS_g;
-				break;
-			case 'o':
-				prefs.outfile = optarg;
-				break;
-			case 'O':
-				prefs.optlevel++;
-				break;
-			case 's':
-				prefs.flags |= PREFS_s;
-				break;
-			case 'U':
-				if(_main_add_undefine(&prefs, optarg) != 0)
-					return 2;
-				break;
-			case '1':
-			case '2':
-			case '3':
-				prefs.optlevel = o - '0';
-				break;
-			default:
-				return _usage();
-		}
-	if(optind == argc)
-		return _usage();
-	if(prefs.flags & PREFS_c && prefs.outfile != NULL && optind + 1 != argc)
-		return _usage();
-	return _c99(&prefs, argc - optind, &argv[optind]) == 0 ? 0 : 2;
-}
-
-static int _main_add_define(Prefs * prefs, char * define)
-{
-	char ** p;
-	char * value;
-
-	if(strlen(define) == 0)
-		return 1;
-	value = strtok(define, "=");
-	if((p = realloc(prefs->defines, sizeof(*p) * (prefs->defines_cnt + 1)))
-			== NULL)
-		return error_set_print(PACKAGE, 1, "%s", strerror(errno));
-	prefs->defines = p;
-	prefs->defines[prefs->defines_cnt++] = define;
-	return 0;
-}
-
-static int _main_add_path(Prefs * prefs, char const * path)
-{
-	const char ** p;
-
-	if((p = realloc(prefs->paths, sizeof(*p) * (prefs->paths_cnt + 1)))
-			== NULL)
-		return error_set_print(PACKAGE, 1, "%s", strerror(errno));
-	prefs->paths = p;
-	prefs->paths[prefs->paths_cnt++] = path;
-	return 0;
-}
-
-static int _main_add_undefine(Prefs * prefs, char const * undefine)
-{
-	const char ** p;
-
-	if(strlen(undefine) == 0)
-		return 1;
-	if((p = realloc(prefs->undefines, sizeof(*p)
-					* (prefs->undefines_cnt + 1))) == NULL)
-		return error_set_print(PACKAGE, 1, "%s", strerror(errno));
-	prefs->undefines = p;
-	prefs->undefines[prefs->undefines_cnt++] = undefine;
-	return 0;
-}
diff --git a/src/c99.h b/src/c99.h
index 14a6218..1d96b3c 100644
--- a/src/c99.h
+++ b/src/c99.h
@@ -19,13 +19,14 @@
 #ifndef C99_C99_H
 # define C99_C99_H
 
+# include <stdio.h>
 # include <cpp.h>
 
 
 /* C99 */
 /* protected */
 /* types */
-typedef Cpp C99;
+typedef struct _C99 C99;
 
 typedef enum _C99Code
 {
@@ -137,14 +138,30 @@ typedef enum _C99Code
 	C99_CODE_KEYWORD__IMAGINARY
 } C99Code;
 
-typedef enum _C99ParserMode {
-	C99_PARSER_MODE_OBJECT, C99_PARSER_MODE_EXECUTABLE
-} C99ParserMode;
+typedef struct _C99Prefs
+{
+	int flags;
+	char const * outfile;
+	const char ** paths;
+	size_t paths_cnt;
+	char ** defines;
+	size_t defines_cnt;
+	const char ** undefines;
+	size_t undefines_cnt;
+	int optlevel;
+} C99Prefs;
+# define C99PREFS_c 0x1
+# define C99PREFS_E 0x2
+# define C99PREFS_g 0x4
+# define C99PREFS_s 0x8
 
 
 /* functions */
+C99 * c99_new(C99Prefs * prefs, char const * pathname);
+int c99_delete(C99 * c99);
+
 /* useful */
-int c99_parse(C99 * c99, C99ParserMode mode);
+int c99_parse(C99 * c99);
 
 int c99_scan(C99 * c99, Token ** token);
 
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..7aebc13
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,162 @@
+/* $Id$ */
+/* Copyright (c) 2008 Pierre Pronchery <khorben@defora.org> */
+/* This file is part of DeforaOS Devel c99 */
+/* c99 is not free software; you can redistribute it and/or modify it under the
+ * terms of the Creative Commons Attribution-NonCommercial-ShareAlike 3.0
+ * Unported as published by the Creative Commons organization.
+ *
+ * c99 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 Creative Commons Attribution-NonCommercial-
+ * ShareAlike 3.0 Unported license for more details.
+ *
+ * You should have received a copy of the Creative Commons Attribution-
+ * NonCommercial-ShareAlike 3.0 along with c99; if not, browse to
+ * http://creativecommons.org/licenses/by-nc-sa/3.0/ */
+
+
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include "c99.h"
+#include "../config.h"
+
+
+/* c99 */
+static int _c99(C99Prefs * prefs, int filec, char * filev[])
+{
+	int ret = 0;
+	int i;
+	C99 * c99;
+
+	if(filec == 1)
+	{
+		if((c99 = c99_new(prefs, filev[0])) == NULL)
+			return error_print(PACKAGE);
+		ret = c99_parse(c99);
+		c99_delete(c99);
+		return ret;
+	}
+	for(i = 0; i < filec; i++)
+	{
+		/* FIXME implement (link edition) */
+	}
+	return ret;
+}
+
+
+/* usage */
+static int _usage(void)
+{
+	fputs("Usage: c99 [-c][-D name[=value]]...[-E][-g][-I directory]"
+"[-L directory][-o outfile][-Ooptlevel][-s][-U name]... operand ...\n", stderr);
+	return 1;
+}
+
+
+/* public */
+/* main */
+static int _main_add_define(C99Prefs * prefs, char * define);
+static int _main_add_path(C99Prefs * prefs, char const * path);
+static int _main_add_undefine(C99Prefs * prefs, char const * undefine);
+
+int main(int argc, char * argv[])
+{
+	C99Prefs prefs;
+	int o;
+
+	memset(&prefs, 0, sizeof(prefs));
+	while((o = getopt(argc, argv, "cD:EgI:L:o:O123sU:")) != -1)
+		switch(o)
+		{
+			case 'c':
+				prefs.flags |= C99PREFS_c;
+				break;
+			case 'D':
+				if(_main_add_define(&prefs, optarg) != 0)
+					return 2;
+				break;
+			case 'E':
+				prefs.flags |= C99PREFS_E;
+				break;
+			case 'I':
+				if(_main_add_path(&prefs, optarg) != 0)
+					return 2;
+				break;
+			case 'g':
+				prefs.flags |= C99PREFS_g;
+				break;
+			case 'o':
+				prefs.outfile = optarg;
+				break;
+			case 'O':
+				prefs.optlevel++;
+				break;
+			case 's':
+				prefs.flags |= C99PREFS_s;
+				break;
+			case 'U':
+				if(_main_add_undefine(&prefs, optarg) != 0)
+					return 2;
+				break;
+			case '1':
+			case '2':
+			case '3':
+				prefs.optlevel = o - '0';
+				break;
+			default:
+				return _usage();
+		}
+	if(optind == argc)
+		return _usage();
+	if(prefs.flags & C99PREFS_c
+			&& prefs.outfile != NULL
+			&& optind + 1 != argc)
+		return _usage();
+	return _c99(&prefs, argc - optind, &argv[optind]) == 0 ? 0 : 2;
+}
+
+static int _main_add_define(C99Prefs * prefs, char * define)
+{
+	char ** p;
+	char * value;
+
+	if(strlen(define) == 0)
+		return 1;
+	value = strtok(define, "=");
+	if((p = realloc(prefs->defines, sizeof(*p) * (prefs->defines_cnt + 1)))
+			== NULL)
+		return error_set_print(PACKAGE, 1, "%s", strerror(errno));
+	prefs->defines = p;
+	prefs->defines[prefs->defines_cnt++] = define;
+	return 0;
+}
+
+static int _main_add_path(C99Prefs * prefs, char const * path)
+{
+	const char ** p;
+
+	if((p = realloc(prefs->paths, sizeof(*p) * (prefs->paths_cnt + 1)))
+			== NULL)
+		return error_set_print(PACKAGE, 1, "%s", strerror(errno));
+	prefs->paths = p;
+	prefs->paths[prefs->paths_cnt++] = path;
+	return 0;
+}
+
+static int _main_add_undefine(C99Prefs * prefs, char const * undefine)
+{
+	const char ** p;
+
+	if(strlen(undefine) == 0)
+		return 1;
+	if((p = realloc(prefs->undefines, sizeof(*p)
+					* (prefs->undefines_cnt + 1))) == NULL)
+		return error_set_print(PACKAGE, 1, "%s", strerror(errno));
+	prefs->undefines = p;
+	prefs->undefines[prefs->undefines_cnt++] = undefine;
+	return 0;
+}
diff --git a/src/project.conf b/src/project.conf
index 32f6d24..9fc2acf 100644
--- a/src/project.conf
+++ b/src/project.conf
@@ -6,10 +6,13 @@ dist=c99.h,tokenset.h
 
 [c99]
 type=binary
-sources=c99.c,tokenset.c
+sources=c99.c,main.c,tokenset.c
 
 [c99.c]
 depends=c99.h,tokenset.h
 
+[main.c]
+depends=c99.h
+
 [tokenset.c]
 depends=c99.h,tokenset.h