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1 /* |
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2 ** $Id: lauxlib.h,v 1.88.1.1 2007/12/27 13:02:25 roberto Exp $ |
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3 ** Auxiliary functions for building Lua libraries |
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4 ** See Copyright Notice in lua.h |
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5 */ |
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6 |
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7 |
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8 #ifndef lauxlib_h |
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9 #define lauxlib_h |
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10 |
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11 |
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12 #include <stddef.h> |
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13 #include <stdio.h> |
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14 |
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15 #include "lua.h" |
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16 |
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17 |
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18 #if defined(LUA_COMPAT_GETN) |
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19 LUALIB_API int (luaL_getn) (lua_State *L, int t); |
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20 LUALIB_API void (luaL_setn) (lua_State *L, int t, int n); |
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21 #else |
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22 #define luaL_getn(L,i) ((int)lua_objlen(L, i)) |
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23 #define luaL_setn(L,i,j) ((void)0) /* no op! */ |
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24 #endif |
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25 |
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26 #if defined(LUA_COMPAT_OPENLIB) |
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27 #define luaI_openlib luaL_openlib |
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28 #endif |
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29 |
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30 |
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31 /* extra error code for `luaL_load' */ |
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32 #define LUA_ERRFILE (LUA_ERRERR+1) |
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33 |
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34 |
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35 typedef struct luaL_Reg { |
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36 const char *name; |
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37 lua_CFunction func; |
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38 } luaL_Reg; |
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39 |
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40 |
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41 |
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42 LUALIB_API void (luaI_openlib) (lua_State *L, const char *libname, |
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43 const luaL_Reg *l, int nup); |
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44 LUALIB_API void (luaL_register) (lua_State *L, const char *libname, |
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45 const luaL_Reg *l); |
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46 LUALIB_API int (luaL_getmetafield) (lua_State *L, int obj, const char *e); |
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47 LUALIB_API int (luaL_callmeta) (lua_State *L, int obj, const char *e); |
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48 LUALIB_API int (luaL_typerror) (lua_State *L, int narg, const char *tname); |
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49 LUALIB_API int (luaL_argerror) (lua_State *L, int numarg, const char *extramsg); |
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50 LUALIB_API const char *(luaL_checklstring) (lua_State *L, int numArg, |
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51 size_t *l); |
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52 LUALIB_API const char *(luaL_optlstring) (lua_State *L, int numArg, |
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53 const char *def, size_t *l); |
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54 LUALIB_API lua_Number (luaL_checknumber) (lua_State *L, int numArg); |
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55 LUALIB_API lua_Number (luaL_optnumber) (lua_State *L, int nArg, lua_Number def); |
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56 |
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57 LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int numArg); |
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58 LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int nArg, |
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59 lua_Integer def); |
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60 |
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61 LUALIB_API void (luaL_checkstack) (lua_State *L, int sz, const char *msg); |
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62 LUALIB_API void (luaL_checktype) (lua_State *L, int narg, int t); |
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63 LUALIB_API void (luaL_checkany) (lua_State *L, int narg); |
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64 |
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65 LUALIB_API int (luaL_newmetatable) (lua_State *L, const char *tname); |
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66 LUALIB_API void *(luaL_checkudata) (lua_State *L, int ud, const char *tname); |
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67 |
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68 LUALIB_API void (luaL_where) (lua_State *L, int lvl); |
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69 LUALIB_API int (luaL_error) (lua_State *L, const char *fmt, ...); |
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70 |
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71 LUALIB_API int (luaL_checkoption) (lua_State *L, int narg, const char *def, |
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72 const char *const lst[]); |
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73 |
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74 LUALIB_API int (luaL_ref) (lua_State *L, int t); |
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75 LUALIB_API void (luaL_unref) (lua_State *L, int t, int ref); |
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76 |
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77 LUALIB_API int (luaL_loadfile) (lua_State *L, const char *filename); |
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78 LUALIB_API int (luaL_loadbuffer) (lua_State *L, const char *buff, size_t sz, |
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79 const char *name); |
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80 LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s); |
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81 |
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82 LUALIB_API lua_State *(luaL_newstate) (void); |
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83 |
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84 |
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85 LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s, const char *p, |
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86 const char *r); |
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87 |
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88 LUALIB_API const char *(luaL_findtable) (lua_State *L, int idx, |
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89 const char *fname, int szhint); |
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90 |
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91 |
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92 |
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93 |
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94 /* |
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95 ** =============================================================== |
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96 ** some useful macros |
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97 ** =============================================================== |
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98 */ |
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99 |
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100 #define luaL_argcheck(L, cond,numarg,extramsg) \ |
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101 ((void)((cond) || luaL_argerror(L, (numarg), (extramsg)))) |
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102 #define luaL_checkstring(L,n) (luaL_checklstring(L, (n), NULL)) |
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103 #define luaL_optstring(L,n,d) (luaL_optlstring(L, (n), (d), NULL)) |
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104 #define luaL_checkint(L,n) ((int)luaL_checkinteger(L, (n))) |
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105 #define luaL_optint(L,n,d) ((int)luaL_optinteger(L, (n), (d))) |
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106 #define luaL_checklong(L,n) ((long)luaL_checkinteger(L, (n))) |
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107 #define luaL_optlong(L,n,d) ((long)luaL_optinteger(L, (n), (d))) |
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108 |
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109 #define luaL_typename(L,i) lua_typename(L, lua_type(L,(i))) |
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110 |
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111 #define luaL_dofile(L, fn) \ |
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112 (luaL_loadfile(L, fn) || lua_pcall(L, 0, LUA_MULTRET, 0)) |
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113 |
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114 #define luaL_dostring(L, s) \ |
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115 (luaL_loadstring(L, s) || lua_pcall(L, 0, LUA_MULTRET, 0)) |
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116 |
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117 #define luaL_getmetatable(L,n) (lua_getfield(L, LUA_REGISTRYINDEX, (n))) |
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118 |
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119 #define luaL_opt(L,f,n,d) (lua_isnoneornil(L,(n)) ? (d) : f(L,(n))) |
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120 |
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121 /* |
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122 ** {====================================================== |
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123 ** Generic Buffer manipulation |
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124 ** ======================================================= |
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125 */ |
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126 |
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127 |
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128 |
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129 typedef struct luaL_Buffer { |
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130 char *p; /* current position in buffer */ |
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131 int lvl; /* number of strings in the stack (level) */ |
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132 lua_State *L; |
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133 char buffer[LUAL_BUFFERSIZE]; |
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134 } luaL_Buffer; |
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135 |
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136 #define luaL_addchar(B,c) \ |
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137 ((void)((B)->p < ((B)->buffer+LUAL_BUFFERSIZE) || luaL_prepbuffer(B)), \ |
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138 (*(B)->p++ = (char)(c))) |
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139 |
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140 /* compatibility only */ |
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141 #define luaL_putchar(B,c) luaL_addchar(B,c) |
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142 |
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143 #define luaL_addsize(B,n) ((B)->p += (n)) |
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144 |
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145 LUALIB_API void (luaL_buffinit) (lua_State *L, luaL_Buffer *B); |
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146 LUALIB_API char *(luaL_prepbuffer) (luaL_Buffer *B); |
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147 LUALIB_API void (luaL_addlstring) (luaL_Buffer *B, const char *s, size_t l); |
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148 LUALIB_API void (luaL_addstring) (luaL_Buffer *B, const char *s); |
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149 LUALIB_API void (luaL_addvalue) (luaL_Buffer *B); |
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150 LUALIB_API void (luaL_pushresult) (luaL_Buffer *B); |
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151 |
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152 |
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153 /* }====================================================== */ |
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154 |
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155 |
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156 /* compatibility with ref system */ |
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157 |
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158 /* pre-defined references */ |
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159 #define LUA_NOREF (-2) |
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160 #define LUA_REFNIL (-1) |
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161 |
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162 #define lua_ref(L,lock) ((lock) ? luaL_ref(L, LUA_REGISTRYINDEX) : \ |
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163 (lua_pushstring(L, "unlocked references are obsolete"), lua_error(L), 0)) |
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164 |
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165 #define lua_unref(L,ref) luaL_unref(L, LUA_REGISTRYINDEX, (ref)) |
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166 |
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167 #define lua_getref(L,ref) lua_rawgeti(L, LUA_REGISTRYINDEX, (ref)) |
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168 |
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169 |
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170 #define luaL_reg luaL_Reg |
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171 |
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172 #endif |
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173 |
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174 |