1 /*-
2 * Copyright (c) 2020 Kyle Evans <kevans@FreeBSD.org>
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26 #include <sys/cdefs.h>
27 #include <lua.h>
28 #include "lauxlib.h"
29
30 /* Open the pager. No arguments, no return value. */
31 static int
lpager_open(lua_State * L)32 lpager_open(lua_State *L)
33 {
34
35 pager_open();
36 return (0);
37 }
38
39 /*
40 * Output to the pager. All arguments are interpreted as strings and passed to
41 * pager_output(). No return value.
42 */
43 static int
lpager_output(lua_State * L)44 lpager_output(lua_State *L)
45 {
46 const char *outstr;
47 int i;
48
49 for (i = 1; i <= lua_gettop(L); i++) {
50 outstr = luaL_tolstring(L, i, NULL);
51 pager_output(outstr);
52 lua_pop(L, -1);
53 }
54
55 return (0);
56 }
57
58 /* Output to the pager from a file. Takes a filename, no return value. */
59 static int
lpager_file(lua_State * L)60 lpager_file(lua_State *L)
61 {
62
63 return (pager_file(luaL_checkstring(L, 1)));
64 }
65
66 static int
lpager_close(lua_State * L)67 lpager_close(lua_State *L)
68 {
69
70 pager_close();
71 return (0);
72 }
73
74 static const struct luaL_Reg pagerlib[] = {
75 { "open", lpager_open },
76 { "output", lpager_output },
77 { "file", lpager_file },
78 { "close", lpager_close },
79 { NULL, NULL },
80 };
81
82 int
luaopen_pager(lua_State * L)83 luaopen_pager(lua_State *L)
84 {
85 luaL_newlib(L, pagerlib);
86 return 1;
87 }
88