1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
/*
** $Id: lauxlib.c,v 1.16 1999/03/10 14:19:41 roberto Exp roberto $
** Auxiliary functions for building Lua libraries
** See Copyright Notice in lua.h
*/
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
/* Please Notice: This file uses only the official API of Lua
** Any function declared here could be written as an application function.
** With care, these functions can be used by other libraries.
*/
#include "lauxlib.h"
#include "lua.h"
#include "luadebug.h"
int luaL_findstring (char *name, char *list[]) {
int i;
for (i=0; list[i]; i++)
if (strcmp(list[i], name) == 0)
return i;
return -1; /* name not found */
}
void luaL_argerror (int numarg, char *extramsg) {
lua_Function f = lua_stackedfunction(0);
char *funcname;
lua_getobjname(f, &funcname);
numarg -= lua_nups(f);
if (funcname == NULL)
funcname = "?";
if (extramsg == NULL)
luaL_verror("bad argument #%d to function `%.50s'", numarg, funcname);
else
luaL_verror("bad argument #%d to function `%.50s' (%.100s)",
numarg, funcname, extramsg);
}
char *luaL_check_lstr (int numArg, long *len)
{
lua_Object o = lua_getparam(numArg);
luaL_arg_check(lua_isstring(o), numArg, "string expected");
if (len) *len = lua_strlen(o);
return lua_getstring(o);
}
char *luaL_opt_lstr (int numArg, char *def, long *len)
{
return (lua_getparam(numArg) == LUA_NOOBJECT) ? def :
luaL_check_lstr(numArg, len);
}
double luaL_check_number (int numArg)
{
lua_Object o = lua_getparam(numArg);
luaL_arg_check(lua_isnumber(o), numArg, "number expected");
return lua_getnumber(o);
}
double luaL_opt_number (int numArg, double def)
{
return (lua_getparam(numArg) == LUA_NOOBJECT) ? def :
luaL_check_number(numArg);
}
lua_Object luaL_tablearg (int arg)
{
lua_Object o = lua_getparam(arg);
luaL_arg_check(lua_istable(o), arg, "table expected");
return o;
}
lua_Object luaL_functionarg (int arg)
{
lua_Object o = lua_getparam(arg);
luaL_arg_check(lua_isfunction(o), arg, "function expected");
return o;
}
lua_Object luaL_nonnullarg (int numArg)
{
lua_Object o = lua_getparam(numArg);
luaL_arg_check(o != LUA_NOOBJECT, numArg, "value expected");
return o;
}
void luaL_openlib (struct luaL_reg *l, int n)
{
int i;
lua_open(); /* make sure lua is already open */
for (i=0; i<n; i++)
lua_register(l[i].name, l[i].func);
}
void luaL_verror (char *fmt, ...)
{
char buff[500];
va_list argp;
va_start(argp, fmt);
vsprintf(buff, fmt, argp);
va_end(argp);
lua_error(buff);
}
void luaL_chunkid (char *out, char *source, int len) {
len -= 13; /* 13 = strlen("string ''...\0") */
if (*source == '@')
sprintf(out, "file `%.*s'", len, source+1);
else if (*source == '(')
strcpy(out, "(C code)");
else {
char *b = strchr(source , '\n'); /* stop string at first new line */
int lim = (b && (b-source)<len) ? b-source : len;
sprintf(out, "string `%.*s'", lim, source);
strcpy(out+lim+(13-5), "...'"); /* 5 = strlen("...'\0") */
}
}
void luaL_filesource (char *out, char *filename, int len) {
if (filename == NULL) filename = "(stdin)";
sprintf(out, "@%.*s", len-2, filename); /* -2 for '@' and '\0' */
}
|
