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 <lua.h>
27 #include "lauxlib.h"
28
29 /* Open the pager. No arguments, no return value. */
30 static int
lpager_open(lua_State * L)31 lpager_open(lua_State *L)
32 {
33
34 pager_open();
35 return (0);
36 }
37
38 /*
39 * Output to the pager. All arguments are interpreted as strings and passed to
40 * pager_output(). No return value.
41 */
42 static int
lpager_output(lua_State * L)43 lpager_output(lua_State *L)
44 {
45 const char *outstr;
46 int i;
47
48 for (i = 1; i <= lua_gettop(L); i++) {
49 outstr = luaL_tolstring(L, i, NULL);
50 pager_output(outstr);
51 lua_pop(L, -1);
52 }
53
54 return (0);
55 }
56
57 /* Output to the pager from a file. Takes a filename, no return value. */
58 static int
lpager_file(lua_State * L)59 lpager_file(lua_State *L)
60 {
61
62 return (pager_file(luaL_checkstring(L, 1)));
63 }
64
65 static int
lpager_close(lua_State * L)66 lpager_close(lua_State *L)
67 {
68
69 pager_close();
70 return (0);
71 }
72
73 static const struct luaL_Reg pagerlib[] = {
74 { "open", lpager_open },
75 { "output", lpager_output },
76 { "file", lpager_file },
77 { "close", lpager_close },
78 { NULL, NULL },
79 };
80
81 int
luaopen_pager(lua_State * L)82 luaopen_pager(lua_State *L)
83 {
84 luaL_newlib(L, pagerlib);
85 return 1;
86 }
87