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| author | Roberto Ierusalimschy <roberto@inf.puc-rio.br> | 1999-01-15 11:11:57 -0200 |
|---|---|---|
| committer | Roberto Ierusalimschy <roberto@inf.puc-rio.br> | 1999-01-15 11:11:57 -0200 |
| commit | 3fecf187ffda02ff7a18cfb8b0d340e2c0e77310 (patch) | |
| tree | 32baa09deeed673549982b6499effd2ab44a980b | |
| parent | 54840fb25696ab30e11d2d80f3c18af6d1f01481 (diff) | |
| download | lua-3fecf187ffda02ff7a18cfb8b0d340e2c0e77310.tar.gz lua-3fecf187ffda02ff7a18cfb8b0d340e2c0e77310.tar.bz2 lua-3fecf187ffda02ff7a18cfb8b0d340e2c0e77310.zip | |
names...
| -rw-r--r-- | ltm.c | 56 | ||||
| -rw-r--r-- | ltm.h | 6 |
2 files changed, 24 insertions, 38 deletions
| @@ -1,5 +1,5 @@ | |||
| 1 | /* | 1 | /* |
| 2 | ** $Id: ltm.c,v 1.18 1998/12/22 18:10:50 roberto Exp roberto $ | 2 | ** $Id: ltm.c,v 1.19 1999/01/13 19:08:10 roberto Exp roberto $ |
| 3 | ** Tag methods | 3 | ** Tag methods |
| 4 | ** See Copyright Notice in lua.h | 4 | ** See Copyright Notice in lua.h |
| 5 | */ | 5 | */ |
| @@ -22,8 +22,7 @@ char *luaT_eventname[] = { /* ORDER IM */ | |||
| 22 | }; | 22 | }; |
| 23 | 23 | ||
| 24 | 24 | ||
| 25 | static int luaI_checkevent (char *name, char *list[]) | 25 | static int luaI_checkevent (char *name, char *list[]) { |
| 26 | { | ||
| 27 | int e = luaL_findstring(name, list); | 26 | int e = luaL_findstring(name, list); |
| 28 | if (e < 0) | 27 | if (e < 0) |
| 29 | luaL_verror("`%.50s' is not a valid event name", name); | 28 | luaL_verror("`%.50s' is not a valid event name", name); |
| @@ -35,7 +34,7 @@ static int luaI_checkevent (char *name, char *list[]) | |||
| 35 | /* events in LUA_T_NIL are all allowed, since this is used as a | 34 | /* events in LUA_T_NIL are all allowed, since this is used as a |
| 36 | * 'placeholder' for "default" fallbacks | 35 | * 'placeholder' for "default" fallbacks |
| 37 | */ | 36 | */ |
| 38 | static char validevents[NUM_TAGS][IM_N] = { /* ORDER LUA_T, ORDER IM */ | 37 | static char luaT_validevents[NUM_TAGS][IM_N] = { /* ORDER LUA_T, ORDER IM */ |
| 39 | {1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1}, /* LUA_T_USERDATA */ | 38 | {1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1}, /* LUA_T_USERDATA */ |
| 40 | {1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1}, /* LUA_T_NUMBER */ | 39 | {1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1}, /* LUA_T_NUMBER */ |
| 41 | {1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}, /* LUA_T_STRING */ | 40 | {1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}, /* LUA_T_STRING */ |
| @@ -45,22 +44,19 @@ static char validevents[NUM_TAGS][IM_N] = { /* ORDER LUA_T, ORDER IM */ | |||
| 45 | {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1} /* LUA_T_NIL */ | 44 | {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1} /* LUA_T_NIL */ |
| 46 | }; | 45 | }; |
| 47 | 46 | ||
| 48 | 47 | static int luaT_validevent (int t, int e) { /* ORDER LUA_T */ | |
| 49 | static int validevent (int t, int e) { /* ORDER LUA_T */ | 48 | return (t < LUA_T_NIL) ? 1 : luaT_validevents[-t][e]; |
| 50 | return (t < LUA_T_NIL) ? 1 : validevents[-t][e]; | ||
| 51 | } | 49 | } |
| 52 | 50 | ||
| 53 | 51 | ||
| 54 | static void init_entry (int tag) | 52 | static void init_entry (int tag) { |
| 55 | { | ||
| 56 | int i; | 53 | int i; |
| 57 | for (i=0; i<IM_N; i++) | 54 | for (i=0; i<IM_N; i++) |
| 58 | ttype(luaT_getim(tag, i)) = LUA_T_NIL; | 55 | ttype(luaT_getim(tag, i)) = LUA_T_NIL; |
| 59 | } | 56 | } |
| 60 | 57 | ||
| 61 | 58 | ||
| 62 | void luaT_init (void) | 59 | void luaT_init (void) { |
| 63 | { | ||
| 64 | int t; | 60 | int t; |
| 65 | L->IMtable_size = NUM_TAGS*2; | 61 | L->IMtable_size = NUM_TAGS*2; |
| 66 | L->last_tag = -(NUM_TAGS-1); | 62 | L->last_tag = -(NUM_TAGS-1); |
| @@ -70,8 +66,7 @@ void luaT_init (void) | |||
| 70 | } | 66 | } |
| 71 | 67 | ||
| 72 | 68 | ||
| 73 | int lua_newtag (void) | 69 | int lua_newtag (void) { |
| 74 | { | ||
| 75 | --L->last_tag; | 70 | --L->last_tag; |
| 76 | if ((-L->last_tag) >= L->IMtable_size) | 71 | if ((-L->last_tag) >= L->IMtable_size) |
| 77 | L->IMtable_size = luaM_growvector(&L->IMtable, L->IMtable_size, | 72 | L->IMtable_size = luaM_growvector(&L->IMtable, L->IMtable_size, |
| @@ -81,34 +76,30 @@ int lua_newtag (void) | |||
| 81 | } | 76 | } |
| 82 | 77 | ||
| 83 | 78 | ||
| 84 | static void checktag (int tag) | 79 | static void checktag (int tag) { |
| 85 | { | ||
| 86 | if (!(L->last_tag <= tag && tag <= 0)) | 80 | if (!(L->last_tag <= tag && tag <= 0)) |
| 87 | luaL_verror("%d is not a valid tag", tag); | 81 | luaL_verror("%d is not a valid tag", tag); |
| 88 | } | 82 | } |
| 89 | 83 | ||
| 90 | void luaT_realtag (int tag) | 84 | void luaT_realtag (int tag) { |
| 91 | { | ||
| 92 | if (!(L->last_tag <= tag && tag < LUA_T_NIL)) | 85 | if (!(L->last_tag <= tag && tag < LUA_T_NIL)) |
| 93 | luaL_verror("tag %d is not result of `newtag'", tag); | 86 | luaL_verror("tag %d is not result of `newtag'", tag); |
| 94 | } | 87 | } |
| 95 | 88 | ||
| 96 | 89 | ||
| 97 | int lua_copytagmethods (int tagto, int tagfrom) | 90 | int lua_copytagmethods (int tagto, int tagfrom) { |
| 98 | { | ||
| 99 | int e; | 91 | int e; |
| 100 | checktag(tagto); | 92 | checktag(tagto); |
| 101 | checktag(tagfrom); | 93 | checktag(tagfrom); |
| 102 | for (e=0; e<IM_N; e++) { | 94 | for (e=0; e<IM_N; e++) { |
| 103 | if (validevent(tagto, e)) | 95 | if (luaT_validevent(tagto, e)) |
| 104 | *luaT_getim(tagto, e) = *luaT_getim(tagfrom, e); | 96 | *luaT_getim(tagto, e) = *luaT_getim(tagfrom, e); |
| 105 | } | 97 | } |
| 106 | return tagto; | 98 | return tagto; |
| 107 | } | 99 | } |
| 108 | 100 | ||
| 109 | 101 | ||
| 110 | int luaT_efectivetag (TObject *o) | 102 | int luaT_effectivetag (TObject *o) { |
| 111 | { | ||
| 112 | int t; | 103 | int t; |
| 113 | switch (t = ttype(o)) { | 104 | switch (t = ttype(o)) { |
| 114 | case LUA_T_ARRAY: | 105 | case LUA_T_ARRAY: |
| @@ -130,23 +121,21 @@ int luaT_efectivetag (TObject *o) | |||
| 130 | } | 121 | } |
| 131 | 122 | ||
| 132 | 123 | ||
| 133 | TObject *luaT_gettagmethod (int t, char *event) | 124 | TObject *luaT_gettagmethod (int t, char *event) { |
| 134 | { | ||
| 135 | int e = luaI_checkevent(event, luaT_eventname); | 125 | int e = luaI_checkevent(event, luaT_eventname); |
| 136 | checktag(t); | 126 | checktag(t); |
| 137 | if (validevent(t, e)) | 127 | if (luaT_validevent(t, e)) |
| 138 | return luaT_getim(t,e); | 128 | return luaT_getim(t,e); |
| 139 | else | 129 | else |
| 140 | return &luaO_nilobject; | 130 | return &luaO_nilobject; |
| 141 | } | 131 | } |
| 142 | 132 | ||
| 143 | 133 | ||
| 144 | void luaT_settagmethod (int t, char *event, TObject *func) | 134 | void luaT_settagmethod (int t, char *event, TObject *func) { |
| 145 | { | ||
| 146 | TObject temp = *func; | 135 | TObject temp = *func; |
| 147 | int e = luaI_checkevent(event, luaT_eventname); | 136 | int e = luaI_checkevent(event, luaT_eventname); |
| 148 | checktag(t); | 137 | checktag(t); |
| 149 | if (!validevent(t, e)) | 138 | if (!luaT_validevent(t, e)) |
| 150 | luaL_verror("cannot change tag method `%.20s' for type `%.20s'%.20s", | 139 | luaL_verror("cannot change tag method `%.20s' for type `%.20s'%.20s", |
| 151 | luaT_eventname[e], luaO_typenames[-t], | 140 | luaT_eventname[e], luaO_typenames[-t], |
| 152 | (t == LUA_T_ARRAY || t == LUA_T_USERDATA) ? " with default tag" | 141 | (t == LUA_T_ARRAY || t == LUA_T_USERDATA) ? " with default tag" |
| @@ -189,23 +178,20 @@ static void errorFB (void) | |||
| 189 | static void nilFB (void) { } | 178 | static void nilFB (void) { } |
| 190 | 179 | ||
| 191 | 180 | ||
| 192 | static void typeFB (void) | 181 | static void typeFB (void) { |
| 193 | { | ||
| 194 | lua_error("unexpected type"); | 182 | lua_error("unexpected type"); |
| 195 | } | 183 | } |
| 196 | 184 | ||
| 197 | 185 | ||
| 198 | static void fillvalids (IMS e, TObject *func) | 186 | static void fillvalids (IMS e, TObject *func) { |
| 199 | { | ||
| 200 | int t; | 187 | int t; |
| 201 | for (t=LUA_T_NIL; t<=LUA_T_USERDATA; t++) | 188 | for (t=LUA_T_NIL; t<=LUA_T_USERDATA; t++) |
| 202 | if (validevent(t, e)) | 189 | if (luaT_validevent(t, e)) |
| 203 | *luaT_getim(t, e) = *func; | 190 | *luaT_getim(t, e) = *func; |
| 204 | } | 191 | } |
| 205 | 192 | ||
| 206 | 193 | ||
| 207 | void luaT_setfallback (void) | 194 | void luaT_setfallback (void) { |
| 208 | { | ||
| 209 | static char *oldnames [] = {"error", "getglobal", "arith", "order", NULL}; | 195 | static char *oldnames [] = {"error", "getglobal", "arith", "order", NULL}; |
| 210 | TObject oldfunc; | 196 | TObject oldfunc; |
| 211 | lua_CFunction replace; | 197 | lua_CFunction replace; |
| @@ -1,5 +1,5 @@ | |||
| 1 | /* | 1 | /* |
| 2 | ** $Id: ltm.h,v 1.3 1997/11/19 17:29:23 roberto Exp roberto $ | 2 | ** $Id: ltm.h,v 1.4 1997/11/26 18:53:45 roberto Exp roberto $ |
| 3 | ** Tag methods | 3 | ** Tag methods |
| 4 | ** See Copyright Notice in lua.h | 4 | ** See Copyright Notice in lua.h |
| 5 | */ | 5 | */ |
| @@ -45,14 +45,14 @@ struct IM { | |||
| 45 | 45 | ||
| 46 | 46 | ||
| 47 | #define luaT_getim(tag,event) (&L->IMtable[-(tag)].int_method[event]) | 47 | #define luaT_getim(tag,event) (&L->IMtable[-(tag)].int_method[event]) |
| 48 | #define luaT_getimbyObj(o,e) (luaT_getim(luaT_efectivetag(o),(e))) | 48 | #define luaT_getimbyObj(o,e) (luaT_getim(luaT_effectivetag(o),(e))) |
| 49 | 49 | ||
| 50 | extern char *luaT_eventname[]; | 50 | extern char *luaT_eventname[]; |
| 51 | 51 | ||
| 52 | 52 | ||
| 53 | void luaT_init (void); | 53 | void luaT_init (void); |
| 54 | void luaT_realtag (int tag); | 54 | void luaT_realtag (int tag); |
| 55 | int luaT_efectivetag (TObject *o); | 55 | int luaT_effectivetag (TObject *o); |
| 56 | void luaT_settagmethod (int t, char *event, TObject *func); | 56 | void luaT_settagmethod (int t, char *event, TObject *func); |
| 57 | TObject *luaT_gettagmethod (int t, char *event); | 57 | TObject *luaT_gettagmethod (int t, char *event); |
| 58 | char *luaT_travtagmethods (int (*fn)(TObject *)); | 58 | char *luaT_travtagmethods (int (*fn)(TObject *)); |
