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/* ltexiolib.c
Copyright 2006-2010 Taco Hoekwater <taco@luatex.org>
This file is part of LuaTeX.
LuaTeX is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your
option) any later version.
LuaTeX 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 General Public License along
with LuaTeX; if not, see <http://www.gnu.org/licenses/>. */
#include "ptexlib.h"
#include "lua/luatex-api.h"
typedef void (*texio_printer) (const char *);
static char *loggable_info = NULL;
static boolean get_selector_value(lua_State * L, int i, int *l)
{
boolean r = false;
int t = lua_type(L,i);
if (t == LUA_TSTRING) {
const char *s = lua_tostring(L, i);
if (lua_key_eq(s,term_and_log)) {
*l = term_and_log;
r = true;
} else if (lua_key_eq(s,log)) {
*l = log_only;
r = true;
} else if (lua_key_eq(s,term)) {
*l = term_only;
r = true;
} else {
*l = term_and_log;
r = true;
}
} else if (t == LUA_TNUMBER) {
int n = lua_tointeger(L,i);
if (file_can_be_written(n)) {
*l = n;
r = true;
} else {
*l = term_and_log;
r = true;
}
} else {
luaL_error(L, "first argument is not 'term and log', 'term', 'log' or a number");
}
return r;
}
static int do_texio_print(lua_State * L, texio_printer printfunction)
{
const char *s;
int i = 1;
int save_selector = selector;
int n = lua_gettop(L);
if (n == 0 || !lua_isstring(L, -1)) { /* or number */
luaL_error(L, "no string to print"); /* or number */
}
if (n > 1) {
if (get_selector_value(L, i, &selector))
i++;
}
if (selector != term_and_log && selector != log_only && selector != term_only) {
if (! valid_write_file(selector)) {
normalize_selector(); /* sets selector */
}
}
for (; i <= n; i++) {
if (lua_isstring(L, i)) { /* or number */
s = lua_tostring(L, i);
printfunction(s);
} else {
luaL_error(L, "argument is not a string");
}
}
selector = save_selector;
return 0;
}
static void do_texio_ini_print(lua_State * L, const char *extra)
{
const char *s;
int i = 1;
int l = term_and_log;
int n = lua_gettop(L);
if (n > 1) {
if (get_selector_value(L, i, &l))
i++;
}
for (; i <= n; i++) {
if (lua_isstring(L, i)) { /* or number */
s = lua_tostring(L, i);
if (l == term_and_log || l == term_only)
fprintf(stdout, "%s%s", extra, s);
if (l == log_only || l == term_and_log) {
if (loggable_info == NULL) {
loggable_info = strdup(s);
} else {
char *v = concat3(loggable_info, extra, s);
free(loggable_info);
loggable_info = v;
}
}
}
}
}
static int texio_print(lua_State * L)
{
if (ready_already != 314159 || job_name == 0) {
do_texio_ini_print(L, "");
return 0;
}
return do_texio_print(L, tprint);
}
static int texio_printnl(lua_State * L)
{
if (ready_already != 314159 || job_name == 0) {
do_texio_ini_print(L, "\n");
return 0;
}
return do_texio_print(L, tprint_nl);
}
/* at the point this function is called, the selector is log_only */
void flush_loggable_info(void)
{
if (loggable_info != NULL) {
fprintf(log_file, "%s\n", loggable_info);
free(loggable_info);
loggable_info = NULL;
}
}
static int texio_setescape(lua_State * L)
{
if (lua_type(L, 1) == LUA_TBOOLEAN) {
escape_controls = lua_toboolean(L,1);
} else {
escape_controls = lua_tointeger(L,1);
}
return 0 ;
}
static const struct luaL_Reg texiolib[] = {
{"write", texio_print},
{"write_nl", texio_printnl},
{"setescape", texio_setescape},
{NULL, NULL}
};
int luaopen_texio(lua_State * L)
{
luaL_register(L, "texio", texiolib);
return 1;
}
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