diff options
Diffstat (limited to 'src/lib/lua/lauxlib.c')
-rw-r--r-- | src/lib/lua/lauxlib.c | 1087 |
1 files changed, 543 insertions, 544 deletions
diff --git a/src/lib/lua/lauxlib.c b/src/lib/lua/lauxlib.c index b00f8c70968..e4a38522bb6 100644 --- a/src/lib/lua/lauxlib.c +++ b/src/lib/lua/lauxlib.c @@ -31,8 +31,8 @@ */ -#define LEVELS1 12 /* size of the first part of the stack */ -#define LEVELS2 10 /* size of the second part of the stack */ +#define LEVELS1 12 /* size of the first part of the stack */ +#define LEVELS2 10 /* size of the second part of the stack */ @@ -41,104 +41,104 @@ ** return 1 + string at top if find a good name. */ static int findfield (lua_State *L, int objidx, int level) { - if (level == 0 || !lua_istable(L, -1)) - return 0; /* not found */ - lua_pushnil(L); /* start 'next' loop */ - while (lua_next(L, -2)) { /* for each pair in table */ - if (lua_type(L, -2) == LUA_TSTRING) { /* ignore non-string keys */ - if (lua_rawequal(L, objidx, -1)) { /* found object? */ - lua_pop(L, 1); /* remove value (but keep name) */ - return 1; - } - else if (findfield(L, objidx, level - 1)) { /* try recursively */ - lua_remove(L, -2); /* remove table (but keep name) */ - lua_pushliteral(L, "."); - lua_insert(L, -2); /* place '.' between the two names */ - lua_concat(L, 3); - return 1; - } - } - lua_pop(L, 1); /* remove value */ - } - return 0; /* not found */ + if (level == 0 || !lua_istable(L, -1)) + return 0; /* not found */ + lua_pushnil(L); /* start 'next' loop */ + while (lua_next(L, -2)) { /* for each pair in table */ + if (lua_type(L, -2) == LUA_TSTRING) { /* ignore non-string keys */ + if (lua_rawequal(L, objidx, -1)) { /* found object? */ + lua_pop(L, 1); /* remove value (but keep name) */ + return 1; + } + else if (findfield(L, objidx, level - 1)) { /* try recursively */ + lua_remove(L, -2); /* remove table (but keep name) */ + lua_pushliteral(L, "."); + lua_insert(L, -2); /* place '.' between the two names */ + lua_concat(L, 3); + return 1; + } + } + lua_pop(L, 1); /* remove value */ + } + return 0; /* not found */ } static int pushglobalfuncname (lua_State *L, lua_Debug *ar) { - int top = lua_gettop(L); - lua_getinfo(L, "f", ar); /* push function */ - lua_pushglobaltable(L); - if (findfield(L, top + 1, 2)) { - lua_copy(L, -1, top + 1); /* move name to proper place */ - lua_pop(L, 2); /* remove pushed values */ - return 1; - } - else { - lua_settop(L, top); /* remove function and global table */ - return 0; - } + int top = lua_gettop(L); + lua_getinfo(L, "f", ar); /* push function */ + lua_pushglobaltable(L); + if (findfield(L, top + 1, 2)) { + lua_copy(L, -1, top + 1); /* move name to proper place */ + lua_pop(L, 2); /* remove pushed values */ + return 1; + } + else { + lua_settop(L, top); /* remove function and global table */ + return 0; + } } static void pushfuncname (lua_State *L, lua_Debug *ar) { - if (*ar->namewhat != '\0') /* is there a name? */ - lua_pushfstring(L, "function " LUA_QS, ar->name); - else if (*ar->what == 'm') /* main? */ - lua_pushliteral(L, "main chunk"); - else if (*ar->what == 'C') { - if (pushglobalfuncname(L, ar)) { - lua_pushfstring(L, "function " LUA_QS, lua_tostring(L, -1)); - lua_remove(L, -2); /* remove name */ - } - else - lua_pushliteral(L, "?"); - } - else - lua_pushfstring(L, "function <%s:%d>", ar->short_src, ar->linedefined); + if (*ar->namewhat != '\0') /* is there a name? */ + lua_pushfstring(L, "function " LUA_QS, ar->name); + else if (*ar->what == 'm') /* main? */ + lua_pushliteral(L, "main chunk"); + else if (*ar->what == 'C') { + if (pushglobalfuncname(L, ar)) { + lua_pushfstring(L, "function " LUA_QS, lua_tostring(L, -1)); + lua_remove(L, -2); /* remove name */ + } + else + lua_pushliteral(L, "?"); + } + else + lua_pushfstring(L, "function <%s:%d>", ar->short_src, ar->linedefined); } static int countlevels (lua_State *L) { - lua_Debug ar; - int li = 1, le = 1; - /* find an upper bound */ - while (lua_getstack(L, le, &ar)) { li = le; le *= 2; } - /* do a binary search */ - while (li < le) { - int m = (li + le)/2; - if (lua_getstack(L, m, &ar)) li = m + 1; - else le = m; - } - return le - 1; + lua_Debug ar; + int li = 1, le = 1; + /* find an upper bound */ + while (lua_getstack(L, le, &ar)) { li = le; le *= 2; } + /* do a binary search */ + while (li < le) { + int m = (li + le)/2; + if (lua_getstack(L, m, &ar)) li = m + 1; + else le = m; + } + return le - 1; } LUALIB_API void luaL_traceback (lua_State *L, lua_State *L1, - const char *msg, int level) { - lua_Debug ar; - int top = lua_gettop(L); - int numlevels = countlevels(L1); - int mark = (numlevels > LEVELS1 + LEVELS2) ? LEVELS1 : 0; - if (msg) lua_pushfstring(L, "%s\n", msg); - lua_pushliteral(L, "stack traceback:"); - while (lua_getstack(L1, level++, &ar)) { - if (level == mark) { /* too many levels? */ - lua_pushliteral(L, "\n\t..."); /* add a '...' */ - level = numlevels - LEVELS2; /* and skip to last ones */ - } - else { - lua_getinfo(L1, "Slnt", &ar); - lua_pushfstring(L, "\n\t%s:", ar.short_src); - if (ar.currentline > 0) - lua_pushfstring(L, "%d:", ar.currentline); - lua_pushliteral(L, " in "); - pushfuncname(L, &ar); - if (ar.istailcall) - lua_pushliteral(L, "\n\t(...tail calls...)"); - lua_concat(L, lua_gettop(L) - top); - } - } - lua_concat(L, lua_gettop(L) - top); + const char *msg, int level) { + lua_Debug ar; + int top = lua_gettop(L); + int numlevels = countlevels(L1); + int mark = (numlevels > LEVELS1 + LEVELS2) ? LEVELS1 : 0; + if (msg) lua_pushfstring(L, "%s\n", msg); + lua_pushliteral(L, "stack traceback:"); + while (lua_getstack(L1, level++, &ar)) { + if (level == mark) { /* too many levels? */ + lua_pushliteral(L, "\n\t..."); /* add a '...' */ + level = numlevels - LEVELS2; /* and skip to last ones */ + } + else { + lua_getinfo(L1, "Slnt", &ar); + lua_pushfstring(L, "\n\t%s:", ar.short_src); + if (ar.currentline > 0) + lua_pushfstring(L, "%d:", ar.currentline); + lua_pushliteral(L, " in "); + pushfuncname(L, &ar); + if (ar.istailcall) + lua_pushliteral(L, "\n\t(...tail calls...)"); + lua_concat(L, lua_gettop(L) - top); + } + } + lua_concat(L, lua_gettop(L) - top); } /* }====================================================== */ @@ -151,78 +151,78 @@ LUALIB_API void luaL_traceback (lua_State *L, lua_State *L1, */ LUALIB_API int luaL_argerror (lua_State *L, int narg, const char *extramsg) { - lua_Debug ar; - if (!lua_getstack(L, 0, &ar)) /* no stack frame? */ - return luaL_error(L, "bad argument #%d (%s)", narg, extramsg); - lua_getinfo(L, "n", &ar); - if (strcmp(ar.namewhat, "method") == 0) { - narg--; /* do not count `self' */ - if (narg == 0) /* error is in the self argument itself? */ - return luaL_error(L, "calling " LUA_QS " on bad self (%s)", - ar.name, extramsg); - } - if (ar.name == NULL) - ar.name = (pushglobalfuncname(L, &ar)) ? lua_tostring(L, -1) : "?"; - return luaL_error(L, "bad argument #%d to " LUA_QS " (%s)", - narg, ar.name, extramsg); + lua_Debug ar; + if (!lua_getstack(L, 0, &ar)) /* no stack frame? */ + return luaL_error(L, "bad argument #%d (%s)", narg, extramsg); + lua_getinfo(L, "n", &ar); + if (strcmp(ar.namewhat, "method") == 0) { + narg--; /* do not count `self' */ + if (narg == 0) /* error is in the self argument itself? */ + return luaL_error(L, "calling " LUA_QS " on bad self (%s)", + ar.name, extramsg); + } + if (ar.name == NULL) + ar.name = (pushglobalfuncname(L, &ar)) ? lua_tostring(L, -1) : "?"; + return luaL_error(L, "bad argument #%d to " LUA_QS " (%s)", + narg, ar.name, extramsg); } static int typeerror (lua_State *L, int narg, const char *tname) { - const char *msg = lua_pushfstring(L, "%s expected, got %s", - tname, luaL_typename(L, narg)); - return luaL_argerror(L, narg, msg); + const char *msg = lua_pushfstring(L, "%s expected, got %s", + tname, luaL_typename(L, narg)); + return luaL_argerror(L, narg, msg); } static void tag_error (lua_State *L, int narg, int tag) { - typeerror(L, narg, lua_typename(L, tag)); + typeerror(L, narg, lua_typename(L, tag)); } LUALIB_API void luaL_where (lua_State *L, int level) { - lua_Debug ar; - if (lua_getstack(L, level, &ar)) { /* check function at level */ - lua_getinfo(L, "Sl", &ar); /* get info about it */ - if (ar.currentline > 0) { /* is there info? */ - lua_pushfstring(L, "%s:%d: ", ar.short_src, ar.currentline); - return; - } - } - lua_pushliteral(L, ""); /* else, no information available... */ + lua_Debug ar; + if (lua_getstack(L, level, &ar)) { /* check function at level */ + lua_getinfo(L, "Sl", &ar); /* get info about it */ + if (ar.currentline > 0) { /* is there info? */ + lua_pushfstring(L, "%s:%d: ", ar.short_src, ar.currentline); + return; + } + } + lua_pushliteral(L, ""); /* else, no information available... */ } LUALIB_API int luaL_error (lua_State *L, const char *fmt, ...) { - va_list argp; - va_start(argp, fmt); - luaL_where(L, 1); - lua_pushvfstring(L, fmt, argp); - va_end(argp); - lua_concat(L, 2); - return lua_error(L); + va_list argp; + va_start(argp, fmt); + luaL_where(L, 1); + lua_pushvfstring(L, fmt, argp); + va_end(argp); + lua_concat(L, 2); + return lua_error(L); } LUALIB_API int luaL_fileresult (lua_State *L, int stat, const char *fname) { - int en = errno; /* calls to Lua API may change this value */ - if (stat) { - lua_pushboolean(L, 1); - return 1; - } - else { - lua_pushnil(L); - if (fname) - lua_pushfstring(L, "%s: %s", fname, strerror(en)); - else - lua_pushstring(L, strerror(en)); - lua_pushinteger(L, en); - return 3; - } + int en = errno; /* calls to Lua API may change this value */ + if (stat) { + lua_pushboolean(L, 1); + return 1; + } + else { + lua_pushnil(L); + if (fname) + lua_pushfstring(L, "%s: %s", fname, strerror(en)); + else + lua_pushstring(L, strerror(en)); + lua_pushinteger(L, en); + return 3; + } } -#if !defined(inspectstat) /* { */ +#if !defined(inspectstat) /* { */ #if defined(LUA_USE_POSIX) @@ -232,8 +232,8 @@ LUALIB_API int luaL_fileresult (lua_State *L, int stat, const char *fname) { ** use appropriate macros to interpret 'pclose' return status */ #define inspectstat(stat,what) \ - if (WIFEXITED(stat)) { stat = WEXITSTATUS(stat); } \ - else if (WIFSIGNALED(stat)) { stat = WTERMSIG(stat); what = "signal"; } + if (WIFEXITED(stat)) { stat = WEXITSTATUS(stat); } \ + else if (WIFSIGNALED(stat)) { stat = WTERMSIG(stat); what = "signal"; } #else @@ -241,23 +241,23 @@ LUALIB_API int luaL_fileresult (lua_State *L, int stat, const char *fname) { #endif -#endif /* } */ +#endif /* } */ LUALIB_API int luaL_execresult (lua_State *L, int stat) { - const char *what = "exit"; /* type of termination */ - if (stat == -1) /* error? */ - return luaL_fileresult(L, 0, NULL); - else { - inspectstat(stat, what); /* interpret result */ - if (*what == 'e' && stat == 0) /* successful termination? */ - lua_pushboolean(L, 1); - else - lua_pushnil(L); - lua_pushstring(L, what); - lua_pushinteger(L, stat); - return 3; /* return true/nil,what,code */ - } + const char *what = "exit"; /* type of termination */ + if (stat == -1) /* error? */ + return luaL_fileresult(L, 0, NULL); + else { + inspectstat(stat, what); /* interpret result */ + if (*what == 'e' && stat == 0) /* successful termination? */ + lua_pushboolean(L, 1); + else + lua_pushnil(L); + lua_pushstring(L, what); + lua_pushinteger(L, stat); + return 3; /* return true/nil,what,code */ + } } /* }====================================================== */ @@ -270,42 +270,42 @@ LUALIB_API int luaL_execresult (lua_State *L, int stat) { */ LUALIB_API int luaL_newmetatable (lua_State *L, const char *tname) { - luaL_getmetatable(L, tname); /* try to get metatable */ - if (!lua_isnil(L, -1)) /* name already in use? */ - return 0; /* leave previous value on top, but return 0 */ - lua_pop(L, 1); - lua_newtable(L); /* create metatable */ - lua_pushvalue(L, -1); - lua_setfield(L, LUA_REGISTRYINDEX, tname); /* registry.name = metatable */ - return 1; + luaL_getmetatable(L, tname); /* try to get metatable */ + if (!lua_isnil(L, -1)) /* name already in use? */ + return 0; /* leave previous value on top, but return 0 */ + lua_pop(L, 1); + lua_newtable(L); /* create metatable */ + lua_pushvalue(L, -1); + lua_setfield(L, LUA_REGISTRYINDEX, tname); /* registry.name = metatable */ + return 1; } LUALIB_API void luaL_setmetatable (lua_State *L, const char *tname) { - luaL_getmetatable(L, tname); - lua_setmetatable(L, -2); + luaL_getmetatable(L, tname); + lua_setmetatable(L, -2); } LUALIB_API void *luaL_testudata (lua_State *L, int ud, const char *tname) { - void *p = lua_touserdata(L, ud); - if (p != NULL) { /* value is a userdata? */ - if (lua_getmetatable(L, ud)) { /* does it have a metatable? */ - luaL_getmetatable(L, tname); /* get correct metatable */ - if (!lua_rawequal(L, -1, -2)) /* not the same? */ - p = NULL; /* value is a userdata with wrong metatable */ - lua_pop(L, 2); /* remove both metatables */ - return p; - } - } - return NULL; /* value is not a userdata with a metatable */ + void *p = lua_touserdata(L, ud); + if (p != NULL) { /* value is a userdata? */ + if (lua_getmetatable(L, ud)) { /* does it have a metatable? */ + luaL_getmetatable(L, tname); /* get correct metatable */ + if (!lua_rawequal(L, -1, -2)) /* not the same? */ + p = NULL; /* value is a userdata with wrong metatable */ + lua_pop(L, 2); /* remove both metatables */ + return p; + } + } + return NULL; /* value is not a userdata with a metatable */ } LUALIB_API void *luaL_checkudata (lua_State *L, int ud, const char *tname) { - void *p = luaL_testudata(L, ud, tname); - if (p == NULL) typeerror(L, ud, tname); - return p; + void *p = luaL_testudata(L, ud, tname); + if (p == NULL) typeerror(L, ud, tname); + return p; } /* }====================================================== */ @@ -318,101 +318,101 @@ LUALIB_API void *luaL_checkudata (lua_State *L, int ud, const char *tname) { */ LUALIB_API int luaL_checkoption (lua_State *L, int narg, const char *def, - const char *const lst[]) { - const char *name = (def) ? luaL_optstring(L, narg, def) : - luaL_checkstring(L, narg); - int i; - for (i=0; lst[i]; i++) - if (strcmp(lst[i], name) == 0) - return i; - return luaL_argerror(L, narg, - lua_pushfstring(L, "invalid option " LUA_QS, name)); + const char *const lst[]) { + const char *name = (def) ? luaL_optstring(L, narg, def) : + luaL_checkstring(L, narg); + int i; + for (i=0; lst[i]; i++) + if (strcmp(lst[i], name) == 0) + return i; + return luaL_argerror(L, narg, + lua_pushfstring(L, "invalid option " LUA_QS, name)); } LUALIB_API void luaL_checkstack (lua_State *L, int space, const char *msg) { - /* keep some extra space to run error routines, if needed */ - const int extra = LUA_MINSTACK; - if (!lua_checkstack(L, space + extra)) { - if (msg) - luaL_error(L, "stack overflow (%s)", msg); - else - luaL_error(L, "stack overflow"); - } + /* keep some extra space to run error routines, if needed */ + const int extra = LUA_MINSTACK; + if (!lua_checkstack(L, space + extra)) { + if (msg) + luaL_error(L, "stack overflow (%s)", msg); + else + luaL_error(L, "stack overflow"); + } } LUALIB_API void luaL_checktype (lua_State *L, int narg, int t) { - if (lua_type(L, narg) != t) - tag_error(L, narg, t); + if (lua_type(L, narg) != t) + tag_error(L, narg, t); } LUALIB_API void luaL_checkany (lua_State *L, int narg) { - if (lua_type(L, narg) == LUA_TNONE) - luaL_argerror(L, narg, "value expected"); + if (lua_type(L, narg) == LUA_TNONE) + luaL_argerror(L, narg, "value expected"); } LUALIB_API const char *luaL_checklstring (lua_State *L, int narg, size_t *len) { - const char *s = lua_tolstring(L, narg, len); - if (!s) tag_error(L, narg, LUA_TSTRING); - return s; + const char *s = lua_tolstring(L, narg, len); + if (!s) tag_error(L, narg, LUA_TSTRING); + return s; } LUALIB_API const char *luaL_optlstring (lua_State *L, int narg, - const char *def, size_t *len) { - if (lua_isnoneornil(L, narg)) { - if (len) - *len = (def ? strlen(def) : 0); - return def; - } - else return luaL_checklstring(L, narg, len); + const char *def, size_t *len) { + if (lua_isnoneornil(L, narg)) { + if (len) + *len = (def ? strlen(def) : 0); + return def; + } + else return luaL_checklstring(L, narg, len); } LUALIB_API lua_Number luaL_checknumber (lua_State *L, int narg) { - int isnum; - lua_Number d = lua_tonumberx(L, narg, &isnum); - if (!isnum) - tag_error(L, narg, LUA_TNUMBER); - return d; + int isnum; + lua_Number d = lua_tonumberx(L, narg, &isnum); + if (!isnum) + tag_error(L, narg, LUA_TNUMBER); + return d; } LUALIB_API lua_Number luaL_optnumber (lua_State *L, int narg, lua_Number def) { - return luaL_opt(L, luaL_checknumber, narg, def); + return luaL_opt(L, luaL_checknumber, narg, def); } LUALIB_API lua_Integer luaL_checkinteger (lua_State *L, int narg) { - int isnum; - lua_Integer d = lua_tointegerx(L, narg, &isnum); - if (!isnum) - tag_error(L, narg, LUA_TNUMBER); - return d; + int isnum; + lua_Integer d = lua_tointegerx(L, narg, &isnum); + if (!isnum) + tag_error(L, narg, LUA_TNUMBER); + return d; } LUALIB_API lua_Unsigned luaL_checkunsigned (lua_State *L, int narg) { - int isnum; - lua_Unsigned d = lua_tounsignedx(L, narg, &isnum); - if (!isnum) - tag_error(L, narg, LUA_TNUMBER); - return d; + int isnum; + lua_Unsigned d = lua_tounsignedx(L, narg, &isnum); + if (!isnum) + tag_error(L, narg, LUA_TNUMBER); + return d; } LUALIB_API lua_Integer luaL_optinteger (lua_State *L, int narg, - lua_Integer def) { - return luaL_opt(L, luaL_checkinteger, narg, def); + lua_Integer def) { + return luaL_opt(L, luaL_checkinteger, narg, def); } LUALIB_API lua_Unsigned luaL_optunsigned (lua_State *L, int narg, - lua_Unsigned def) { - return luaL_opt(L, luaL_checkunsigned, narg, def); + lua_Unsigned def) { + return luaL_opt(L, luaL_checkunsigned, narg, def); } /* }====================================================== */ @@ -428,82 +428,82 @@ LUALIB_API lua_Unsigned luaL_optunsigned (lua_State *L, int narg, ** check whether buffer is using a userdata on the stack as a temporary ** buffer */ -#define buffonstack(B) ((B)->b != (B)->initb) +#define buffonstack(B) ((B)->b != (B)->initb) /* ** returns a pointer to a free area with at least 'sz' bytes */ LUALIB_API char *luaL_prepbuffsize (luaL_Buffer *B, size_t sz) { - lua_State *L = B->L; - if (B->size - B->n < sz) { /* not enough space? */ - char *newbuff; - size_t newsize = B->size * 2; /* double buffer size */ - if (newsize - B->n < sz) /* not big enough? */ - newsize = B->n + sz; - if (newsize < B->n || newsize - B->n < sz) - luaL_error(L, "buffer too large"); - /* create larger buffer */ - newbuff = (char *)lua_newuserdata(L, newsize * sizeof(char)); - /* move content to new buffer */ - memcpy(newbuff, B->b, B->n * sizeof(char)); - if (buffonstack(B)) - lua_remove(L, -2); /* remove old buffer */ - B->b = newbuff; - B->size = newsize; - } - return &B->b[B->n]; + lua_State *L = B->L; + if (B->size - B->n < sz) { /* not enough space? */ + char *newbuff; + size_t newsize = B->size * 2; /* double buffer size */ + if (newsize - B->n < sz) /* not big enough? */ + newsize = B->n + sz; + if (newsize < B->n || newsize - B->n < sz) + luaL_error(L, "buffer too large"); + /* create larger buffer */ + newbuff = (char *)lua_newuserdata(L, newsize * sizeof(char)); + /* move content to new buffer */ + memcpy(newbuff, B->b, B->n * sizeof(char)); + if (buffonstack(B)) + lua_remove(L, -2); /* remove old buffer */ + B->b = newbuff; + B->size = newsize; + } + return &B->b[B->n]; } LUALIB_API void luaL_addlstring (luaL_Buffer *B, const char *s, size_t l) { - char *b = luaL_prepbuffsize(B, l); - memcpy(b, s, l * sizeof(char)); - luaL_addsize(B, l); + char *b = luaL_prepbuffsize(B, l); + memcpy(b, s, l * sizeof(char)); + luaL_addsize(B, l); } LUALIB_API void luaL_addstring (luaL_Buffer *B, const char *s) { - luaL_addlstring(B, s, strlen(s)); + luaL_addlstring(B, s, strlen(s)); } LUALIB_API void luaL_pushresult (luaL_Buffer *B) { - lua_State *L = B->L; - lua_pushlstring(L, B->b, B->n); - if (buffonstack(B)) - lua_remove(L, -2); /* remove old buffer */ + lua_State *L = B->L; + lua_pushlstring(L, B->b, B->n); + if (buffonstack(B)) + lua_remove(L, -2); /* remove old buffer */ } LUALIB_API void luaL_pushresultsize (luaL_Buffer *B, size_t sz) { - luaL_addsize(B, sz); - luaL_pushresult(B); + luaL_addsize(B, sz); + luaL_pushresult(B); } LUALIB_API void luaL_addvalue (luaL_Buffer *B) { - lua_State *L = B->L; - size_t l; - const char *s = lua_tolstring(L, -1, &l); - if (buffonstack(B)) - lua_insert(L, -2); /* put value below buffer */ - luaL_addlstring(B, s, l); - lua_remove(L, (buffonstack(B)) ? -2 : -1); /* remove value */ + lua_State *L = B->L; + size_t l; + const char *s = lua_tolstring(L, -1, &l); + if (buffonstack(B)) + lua_insert(L, -2); /* put value below buffer */ + luaL_addlstring(B, s, l); + lua_remove(L, (buffonstack(B)) ? -2 : -1); /* remove value */ } LUALIB_API void luaL_buffinit (lua_State *L, luaL_Buffer *B) { - B->L = L; - B->b = B->initb; - B->n = 0; - B->size = LUAL_BUFFERSIZE; + B->L = L; + B->b = B->initb; + B->n = 0; + B->size = LUAL_BUFFERSIZE; } LUALIB_API char *luaL_buffinitsize (lua_State *L, luaL_Buffer *B, size_t sz) { - luaL_buffinit(L, B); - return luaL_prepbuffsize(B, sz); + luaL_buffinit(L, B); + return luaL_prepbuffsize(B, sz); } /* }====================================================== */ @@ -516,38 +516,38 @@ LUALIB_API char *luaL_buffinitsize (lua_State *L, luaL_Buffer *B, size_t sz) { */ /* index of free-list header */ -#define freelist 0 +#define freelist 0 LUALIB_API int luaL_ref (lua_State *L, int t) { - int ref; - if (lua_isnil(L, -1)) { - lua_pop(L, 1); /* remove from stack */ - return LUA_REFNIL; /* `nil' has a unique fixed reference */ - } - t = lua_absindex(L, t); - lua_rawgeti(L, t, freelist); /* get first free element */ - ref = (int)lua_tointeger(L, -1); /* ref = t[freelist] */ - lua_pop(L, 1); /* remove it from stack */ - if (ref != 0) { /* any free element? */ - lua_rawgeti(L, t, ref); /* remove it from list */ - lua_rawseti(L, t, freelist); /* (t[freelist] = t[ref]) */ - } - else /* no free elements */ - ref = (int)lua_rawlen(L, t) + 1; /* get a new reference */ - lua_rawseti(L, t, ref); - return ref; + int ref; + if (lua_isnil(L, -1)) { + lua_pop(L, 1); /* remove from stack */ + return LUA_REFNIL; /* `nil' has a unique fixed reference */ + } + t = lua_absindex(L, t); + lua_rawgeti(L, t, freelist); /* get first free element */ + ref = (int)lua_tointeger(L, -1); /* ref = t[freelist] */ + lua_pop(L, 1); /* remove it from stack */ + if (ref != 0) { /* any free element? */ + lua_rawgeti(L, t, ref); /* remove it from list */ + lua_rawseti(L, t, freelist); /* (t[freelist] = t[ref]) */ + } + else /* no free elements */ + ref = (int)lua_rawlen(L, t) + 1; /* get a new reference */ + lua_rawseti(L, t, ref); + return ref; } LUALIB_API void luaL_unref (lua_State *L, int t, int ref) { - if (ref >= 0) { - t = lua_absindex(L, t); - lua_rawgeti(L, t, freelist); - lua_rawseti(L, t, ref); /* t[ref] = t[freelist] */ - lua_pushinteger(L, ref); - lua_rawseti(L, t, freelist); /* t[freelist] = ref */ - } + if (ref >= 0) { + t = lua_absindex(L, t); + lua_rawgeti(L, t, freelist); + lua_rawseti(L, t, ref); /* t[ref] = t[freelist] */ + lua_pushinteger(L, ref); + lua_rawseti(L, t, freelist); /* t[freelist] = ref */ + } } /* }====================================================== */ @@ -560,50 +560,50 @@ LUALIB_API void luaL_unref (lua_State *L, int t, int ref) { */ typedef struct LoadF { - int n; /* number of pre-read characters */ - FILE *f; /* file being read */ - char buff[LUAL_BUFFERSIZE]; /* area for reading file */ + int n; /* number of pre-read characters */ + FILE *f; /* file being read */ + char buff[LUAL_BUFFERSIZE]; /* area for reading file */ } LoadF; static const char *getF (lua_State *L, void *ud, size_t *size) { - LoadF *lf = (LoadF *)ud; - (void)L; /* not used */ - if (lf->n > 0) { /* are there pre-read characters to be read? */ - *size = lf->n; /* return them (chars already in buffer) */ - lf->n = 0; /* no more pre-read characters */ - } - else { /* read a block from file */ - /* 'fread' can return > 0 *and* set the EOF flag. If next call to - 'getF' called 'fread', it might still wait for user input. - The next check avoids this problem. */ - if (feof(lf->f)) return NULL; - *size = fread(lf->buff, 1, sizeof(lf->buff), lf->f); /* read block */ - } - return lf->buff; + LoadF *lf = (LoadF *)ud; + (void)L; /* not used */ + if (lf->n > 0) { /* are there pre-read characters to be read? */ + *size = lf->n; /* return them (chars already in buffer) */ + lf->n = 0; /* no more pre-read characters */ + } + else { /* read a block from file */ + /* 'fread' can return > 0 *and* set the EOF flag. If next call to + 'getF' called 'fread', it might still wait for user input. + The next check avoids this problem. */ + if (feof(lf->f)) return NULL; + *size = fread(lf->buff, 1, sizeof(lf->buff), lf->f); /* read block */ + } + return lf->buff; } static int errfile (lua_State *L, const char *what, int fnameindex) { - const char *serr = strerror(errno); - const char *filename = lua_tostring(L, fnameindex) + 1; - lua_pushfstring(L, "cannot %s %s: %s", what, filename, serr); - lua_remove(L, fnameindex); - return LUA_ERRFILE; + const char *serr = strerror(errno); + const char *filename = lua_tostring(L, fnameindex) + 1; + lua_pushfstring(L, "cannot %s %s: %s", what, filename, serr); + lua_remove(L, fnameindex); + return LUA_ERRFILE; } static int skipBOM (LoadF *lf) { - const char *p = "\xEF\xBB\xBF"; /* Utf8 BOM mark */ - int c; - lf->n = 0; - do { - c = getc(lf->f); - if (c == EOF || c != *(const unsigned char *)p++) return c; - lf->buff[lf->n++] = c; /* to be read by the parser */ - } while (*p != '\0'); - lf->n = 0; /* prefix matched; discard it */ - return getc(lf->f); /* return next character */ + const char *p = "\xEF\xBB\xBF"; /* Utf8 BOM mark */ + int c; + lf->n = 0; + do { + c = getc(lf->f); + if (c == EOF || c != *(const unsigned char *)p++) return c; + lf->buff[lf->n++] = c; /* to be read by the parser */ + } while (*p != '\0'); + lf->n = 0; /* prefix matched; discard it */ + return getc(lf->f); /* return next character */ } @@ -615,81 +615,81 @@ static int skipBOM (LoadF *lf) { ** a first-line comment). */ static int skipcomment (LoadF *lf, int *cp) { - int c = *cp = skipBOM(lf); - if (c == '#') { /* first line is a comment (Unix exec. file)? */ - do { /* skip first line */ - c = getc(lf->f); - } while (c != EOF && c != '\n') ; - *cp = getc(lf->f); /* skip end-of-line, if present */ - return 1; /* there was a comment */ - } - else return 0; /* no comment */ + int c = *cp = skipBOM(lf); + if (c == '#') { /* first line is a comment (Unix exec. file)? */ + do { /* skip first line */ + c = getc(lf->f); + } while (c != EOF && c != '\n') ; + *cp = getc(lf->f); /* skip end-of-line, if present */ + return 1; /* there was a comment */ + } + else return 0; /* no comment */ } LUALIB_API int luaL_loadfilex (lua_State *L, const char *filename, - const char *mode) { - LoadF lf; - int status, readstatus; - int c; - int fnameindex = lua_gettop(L) + 1; /* index of filename on the stack */ - if (filename == NULL) { - lua_pushliteral(L, "=stdin"); - lf.f = stdin; - } - else { - lua_pushfstring(L, "@%s", filename); - lf.f = fopen(filename, "r"); - if (lf.f == NULL) return errfile(L, "open", fnameindex); - } - if (skipcomment(&lf, &c)) /* read initial portion */ - lf.buff[lf.n++] = '\n'; /* add line to correct line numbers */ - if (c == LUA_SIGNATURE[0] && filename) { /* binary file? */ - lf.f = freopen(filename, "rb", lf.f); /* reopen in binary mode */ - if (lf.f == NULL) return errfile(L, "reopen", fnameindex); - skipcomment(&lf, &c); /* re-read initial portion */ - } - if (c != EOF) - lf.buff[lf.n++] = c; /* 'c' is the first character of the stream */ - status = lua_load(L, getF, &lf, lua_tostring(L, -1), mode); - readstatus = ferror(lf.f); - if (filename) fclose(lf.f); /* close file (even in case of errors) */ - if (readstatus) { - lua_settop(L, fnameindex); /* ignore results from `lua_load' */ - return errfile(L, "read", fnameindex); - } - lua_remove(L, fnameindex); - return status; + const char *mode) { + LoadF lf; + int status, readstatus; + int c; + int fnameindex = lua_gettop(L) + 1; /* index of filename on the stack */ + if (filename == NULL) { + lua_pushliteral(L, "=stdin"); + lf.f = stdin; + } + else { + lua_pushfstring(L, "@%s", filename); + lf.f = fopen(filename, "r"); + if (lf.f == NULL) return errfile(L, "open", fnameindex); + } + if (skipcomment(&lf, &c)) /* read initial portion */ + lf.buff[lf.n++] = '\n'; /* add line to correct line numbers */ + if (c == LUA_SIGNATURE[0] && filename) { /* binary file? */ + lf.f = freopen(filename, "rb", lf.f); /* reopen in binary mode */ + if (lf.f == NULL) return errfile(L, "reopen", fnameindex); + skipcomment(&lf, &c); /* re-read initial portion */ + } + if (c != EOF) + lf.buff[lf.n++] = c; /* 'c' is the first character of the stream */ + status = lua_load(L, getF, &lf, lua_tostring(L, -1), mode); + readstatus = ferror(lf.f); + if (filename) fclose(lf.f); /* close file (even in case of errors) */ + if (readstatus) { + lua_settop(L, fnameindex); /* ignore results from `lua_load' */ + return errfile(L, "read", fnameindex); + } + lua_remove(L, fnameindex); + return status; } typedef struct LoadS { - const char *s; - size_t size; + const char *s; + size_t size; } LoadS; static const char *getS (lua_State *L, void *ud, size_t *size) { - LoadS *ls = (LoadS *)ud; - (void)L; /* not used */ - if (ls->size == 0) return NULL; - *size = ls->size; - ls->size = 0; - return ls->s; + LoadS *ls = (LoadS *)ud; + (void)L; /* not used */ + if (ls->size == 0) return NULL; + *size = ls->size; + ls->size = 0; + return ls->s; } LUALIB_API int luaL_loadbufferx (lua_State *L, const char *buff, size_t size, - const char *name, const char *mode) { - LoadS ls; - ls.s = buff; - ls.size = size; - return lua_load(L, getS, &ls, name, mode); + const char *name, const char *mode) { + LoadS ls; + ls.s = buff; + ls.size = size; + return lua_load(L, getS, &ls, name, mode); } LUALIB_API int luaL_loadstring (lua_State *L, const char *s) { - return luaL_loadbuffer(L, s, strlen(s), s); + return luaL_loadbuffer(L, s, strlen(s), s); } /* }====================================================== */ @@ -697,63 +697,63 @@ LUALIB_API int luaL_loadstring (lua_State *L, const char *s) { LUALIB_API int luaL_getmetafield (lua_State *L, int obj, const char *event) { - if (!lua_getmetatable(L, obj)) /* no metatable? */ - return 0; - lua_pushstring(L, event); - lua_rawget(L, -2); - if (lua_isnil(L, -1)) { - lua_pop(L, 2); /* remove metatable and metafield */ - return 0; - } - else { - lua_remove(L, -2); /* remove only metatable */ - return 1; - } + if (!lua_getmetatable(L, obj)) /* no metatable? */ + return 0; + lua_pushstring(L, event); + lua_rawget(L, -2); + if (lua_isnil(L, -1)) { + lua_pop(L, 2); /* remove metatable and metafield */ + return 0; + } + else { + lua_remove(L, -2); /* remove only metatable */ + return 1; + } } LUALIB_API int luaL_callmeta (lua_State *L, int obj, const char *event) { - obj = lua_absindex(L, obj); - if (!luaL_getmetafield(L, obj, event)) /* no metafield? */ - return 0; - lua_pushvalue(L, obj); - lua_call(L, 1, 1); - return 1; + obj = lua_absindex(L, obj); + if (!luaL_getmetafield(L, obj, event)) /* no metafield? */ + return 0; + lua_pushvalue(L, obj); + lua_call(L, 1, 1); + return 1; } LUALIB_API int luaL_len (lua_State *L, int idx) { - int l; - int isnum; - lua_len(L, idx); - l = (int)lua_tointegerx(L, -1, &isnum); - if (!isnum) - luaL_error(L, "object length is not a number"); - lua_pop(L, 1); /* remove object */ - return l; + int l; + int isnum; + lua_len(L, idx); + l = (int)lua_tointegerx(L, -1, &isnum); + if (!isnum) + luaL_error(L, "object length is not a number"); + lua_pop(L, 1); /* remove object */ + return l; } LUALIB_API const char *luaL_tolstring (lua_State *L, int idx, size_t *len) { - if (!luaL_callmeta(L, idx, "__tostring")) { /* no metafield? */ - switch (lua_type(L, idx)) { - case LUA_TNUMBER: - case LUA_TSTRING: - lua_pushvalue(L, idx); - break; - case LUA_TBOOLEAN: - lua_pushstring(L, (lua_toboolean(L, idx) ? "true" : "false")); - break; - case LUA_TNIL: - lua_pushliteral(L, "nil"); - break; - default: - lua_pushfstring(L, "%s: %p", luaL_typename(L, idx), - lua_topointer(L, idx)); - break; - } - } - return lua_tolstring(L, -1, len); + if (!luaL_callmeta(L, idx, "__tostring")) { /* no metafield? */ + switch (lua_type(L, idx)) { + case LUA_TNUMBER: + case LUA_TSTRING: + lua_pushvalue(L, idx); + break; + case LUA_TBOOLEAN: + lua_pushstring(L, (lua_toboolean(L, idx) ? "true" : "false")); + break; + case LUA_TNIL: + lua_pushliteral(L, "nil"); + break; + default: + lua_pushfstring(L, "%s: %p", luaL_typename(L, idx), + lua_topointer(L, idx)); + break; + } + } + return lua_tolstring(L, -1, len); } @@ -765,29 +765,29 @@ LUALIB_API const char *luaL_tolstring (lua_State *L, int idx, size_t *len) { #if defined(LUA_COMPAT_MODULE) static const char *luaL_findtable (lua_State *L, int idx, - const char *fname, int szhint) { - const char *e; - if (idx) lua_pushvalue(L, idx); - do { - e = strchr(fname, '.'); - if (e == NULL) e = fname + strlen(fname); - lua_pushlstring(L, fname, e - fname); - lua_rawget(L, -2); - if (lua_isnil(L, -1)) { /* no such field? */ - lua_pop(L, 1); /* remove this nil */ - lua_createtable(L, 0, (*e == '.' ? 1 : szhint)); /* new table for field */ - lua_pushlstring(L, fname, e - fname); - lua_pushvalue(L, -2); - lua_settable(L, -4); /* set new table into field */ - } - else if (!lua_istable(L, -1)) { /* field has a non-table value? */ - lua_pop(L, 2); /* remove table and value */ - return fname; /* return problematic part of the name */ - } - lua_remove(L, -2); /* remove previous table */ - fname = e + 1; - } while (*e == '.'); - return NULL; + const char *fname, int szhint) { + const char *e; + if (idx) lua_pushvalue(L, idx); + do { + e = strchr(fname, '.'); + if (e == NULL) e = fname + strlen(fname); + lua_pushlstring(L, fname, e - fname); + lua_rawget(L, -2); + if (lua_isnil(L, -1)) { /* no such field? */ + lua_pop(L, 1); /* remove this nil */ + lua_createtable(L, 0, (*e == '.' ? 1 : szhint)); /* new table for field */ + lua_pushlstring(L, fname, e - fname); + lua_pushvalue(L, -2); + lua_settable(L, -4); /* set new table into field */ + } + else if (!lua_istable(L, -1)) { /* field has a non-table value? */ + lua_pop(L, 2); /* remove table and value */ + return fname; /* return problematic part of the name */ + } + lua_remove(L, -2); /* remove previous table */ + fname = e + 1; + } while (*e == '.'); + return NULL; } @@ -795,9 +795,9 @@ static const char *luaL_findtable (lua_State *L, int idx, ** Count number of elements in a luaL_Reg list. */ static int libsize (const luaL_Reg *l) { - int size = 0; - for (; l && l->name; l++) size++; - return size; + int size = 0; + for (; l && l->name; l++) size++; + return size; } @@ -808,33 +808,33 @@ static int libsize (const luaL_Reg *l) { ** the module table. */ LUALIB_API void luaL_pushmodule (lua_State *L, const char *modname, - int sizehint) { - luaL_findtable(L, LUA_REGISTRYINDEX, "_LOADED", 1); /* get _LOADED table */ - lua_getfield(L, -1, modname); /* get _LOADED[modname] */ - if (!lua_istable(L, -1)) { /* not found? */ - lua_pop(L, 1); /* remove previous result */ - /* try global variable (and create one if it does not exist) */ - lua_pushglobaltable(L); - if (luaL_findtable(L, 0, modname, sizehint) != NULL) - luaL_error(L, "name conflict for module " LUA_QS, modname); - lua_pushvalue(L, -1); - lua_setfield(L, -3, modname); /* _LOADED[modname] = new table */ - } - lua_remove(L, -2); /* remove _LOADED table */ + int sizehint) { + luaL_findtable(L, LUA_REGISTRYINDEX, "_LOADED", 1); /* get _LOADED table */ + lua_getfield(L, -1, modname); /* get _LOADED[modname] */ + if (!lua_istable(L, -1)) { /* not found? */ + lua_pop(L, 1); /* remove previous result */ + /* try global variable (and create one if it does not exist) */ + lua_pushglobaltable(L); + if (luaL_findtable(L, 0, modname, sizehint) != NULL) + luaL_error(L, "name conflict for module " LUA_QS, modname); + lua_pushvalue(L, -1); + lua_setfield(L, -3, modname); /* _LOADED[modname] = new table */ + } + lua_remove(L, -2); /* remove _LOADED table */ } LUALIB_API void luaL_openlib (lua_State *L, const char *libname, - const luaL_Reg *l, int nup) { - luaL_checkversion(L); - if (libname) { - luaL_pushmodule(L, libname, libsize(l)); /* get/create library table */ - lua_insert(L, -(nup + 1)); /* move library table to below upvalues */ - } - if (l) - luaL_setfuncs(L, l, nup); - else - lua_pop(L, nup); /* remove upvalues */ + const luaL_Reg *l, int nup) { + luaL_checkversion(L); + if (libname) { + luaL_pushmodule(L, libname, libsize(l)); /* get/create library table */ + lua_insert(L, -(nup + 1)); /* move library table to below upvalues */ + } + if (l) + luaL_setfuncs(L, l, nup); + else + lua_pop(L, nup); /* remove upvalues */ } #endif @@ -846,16 +846,16 @@ LUALIB_API void luaL_openlib (lua_State *L, const char *libname, ** Returns with only the table at the stack. */ LUALIB_API void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) { - luaL_checkversion(L); - luaL_checkstack(L, nup, "too many upvalues"); - for (; l->name != NULL; l++) { /* fill the table with given functions */ - int i; - for (i = 0; i < nup; i++) /* copy upvalues to the top */ - lua_pushvalue(L, -nup); - lua_pushcclosure(L, l->func, nup); /* closure with those upvalues */ - lua_setfield(L, -(nup + 2), l->name); - } - lua_pop(L, nup); /* remove upvalues */ + luaL_checkversion(L); + luaL_checkstack(L, nup, "too many upvalues"); + for (; l->name != NULL; l++) { /* fill the table with given functions */ + int i; + for (i = 0; i < nup; i++) /* copy upvalues to the top */ + lua_pushvalue(L, -nup); + lua_pushcclosure(L, l->func, nup); /* closure with those upvalues */ + lua_setfield(L, -(nup + 2), l->name); + } + lua_pop(L, nup); /* remove upvalues */ } @@ -864,16 +864,16 @@ LUALIB_API void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) { ** into the stack */ LUALIB_API int luaL_getsubtable (lua_State *L, int idx, const char *fname) { - lua_getfield(L, idx, fname); - if (lua_istable(L, -1)) return 1; /* table already there */ - else { - lua_pop(L, 1); /* remove previous result */ - idx = lua_absindex(L, idx); - lua_newtable(L); - lua_pushvalue(L, -1); /* copy to be left at top */ - lua_setfield(L, idx, fname); /* assign new table to field */ - return 0; /* false, because did not find table there */ - } + lua_getfield(L, idx, fname); + if (lua_istable(L, -1)) return 1; /* table already there */ + else { + lua_pop(L, 1); /* remove previous result */ + idx = lua_absindex(L, idx); + lua_newtable(L); + lua_pushvalue(L, -1); /* copy to be left at top */ + lua_setfield(L, idx, fname); /* assign new table to field */ + return 0; /* false, because did not find table there */ + } } @@ -884,76 +884,75 @@ LUALIB_API int luaL_getsubtable (lua_State *L, int idx, const char *fname) { ** Leaves resulting module on the top. */ LUALIB_API void luaL_requiref (lua_State *L, const char *modname, - lua_CFunction openf, int glb) { - lua_pushcfunction(L, openf); - lua_pushstring(L, modname); /* argument to open function */ - lua_call(L, 1, 1); /* open module */ - luaL_getsubtable(L, LUA_REGISTRYINDEX, "_LOADED"); - lua_pushvalue(L, -2); /* make copy of module (call result) */ - lua_setfield(L, -2, modname); /* _LOADED[modname] = module */ - lua_pop(L, 1); /* remove _LOADED table */ - if (glb) { - lua_pushvalue(L, -1); /* copy of 'mod' */ - lua_setglobal(L, modname); /* _G[modname] = module */ - } + lua_CFunction openf, int glb) { + lua_pushcfunction(L, openf); + lua_pushstring(L, modname); /* argument to open function */ + lua_call(L, 1, 1); /* open module */ + luaL_getsubtable(L, LUA_REGISTRYINDEX, "_LOADED"); + lua_pushvalue(L, -2); /* make copy of module (call result) */ + lua_setfield(L, -2, modname); /* _LOADED[modname] = module */ + lua_pop(L, 1); /* remove _LOADED table */ + if (glb) { + lua_pushvalue(L, -1); /* copy of 'mod' */ + lua_setglobal(L, modname); /* _G[modname] = module */ + } } LUALIB_API const char *luaL_gsub (lua_State *L, const char *s, const char *p, - const char *r) { - const char *wild; - size_t l = strlen(p); - luaL_Buffer b; - luaL_buffinit(L, &b); - while ((wild = strstr(s, p)) != NULL) { - luaL_addlstring(&b, s, wild - s); /* push prefix */ - luaL_addstring(&b, r); /* push replacement in place of pattern */ - s = wild + l; /* continue after `p' */ - } - luaL_addstring(&b, s); /* push last suffix */ - luaL_pushresult(&b); - return lua_tostring(L, -1); + const char *r) { + const char *wild; + size_t l = strlen(p); + luaL_Buffer b; + luaL_buffinit(L, &b); + while ((wild = strstr(s, p)) != NULL) { + luaL_addlstring(&b, s, wild - s); /* push prefix */ + luaL_addstring(&b, r); /* push replacement in place of pattern */ + s = wild + l; /* continue after `p' */ + } + luaL_addstring(&b, s); /* push last suffix */ + luaL_pushresult(&b); + return lua_tostring(L, -1); } static void *l_alloc (void *ud, void *ptr, size_t osize, size_t nsize) { - (void)ud; (void)osize; /* not used */ - if (nsize == 0) { - free(ptr); - return NULL; - } - else - return realloc(ptr, nsize); + (void)ud; (void)osize; /* not used */ + if (nsize == 0) { + free(ptr); + return NULL; + } + else + return realloc(ptr, nsize); } static int panic (lua_State *L) { - luai_writestringerror("PANIC: unprotected error in call to Lua API (%s)\n", - lua_tostring(L, -1)); - return 0; /* return to Lua to abort */ + luai_writestringerror("PANIC: unprotected error in call to Lua API (%s)\n", + lua_tostring(L, -1)); + return 0; /* return to Lua to abort */ } LUALIB_API lua_State *luaL_newstate (void) { - lua_State *L = lua_newstate(l_alloc, NULL); - if (L) lua_atpanic(L, &panic); - return L; + lua_State *L = lua_newstate(l_alloc, NULL); + if (L) lua_atpanic(L, &panic); + return L; } LUALIB_API void luaL_checkversion_ (lua_State *L, lua_Number ver) { - const lua_Number *v = lua_version(L); - if (v != lua_version(NULL)) - luaL_error(L, "multiple Lua VMs detected"); - else if (*v != ver) - luaL_error(L, "version mismatch: app. needs %f, Lua core provides %f", - ver, *v); - /* check conversions number -> integer types */ - lua_pushnumber(L, -(lua_Number)0x1234); - if (lua_tointeger(L, -1) != -0x1234 || - lua_tounsigned(L, -1) != (lua_Unsigned)-0x1234) - luaL_error(L, "bad conversion number->int;" - " must recompile Lua with proper settings"); - lua_pop(L, 1); + const lua_Number *v = lua_version(L); + if (v != lua_version(NULL)) + luaL_error(L, "multiple Lua VMs detected"); + else if (*v != ver) + luaL_error(L, "version mismatch: app. needs %f, Lua core provides %f", + ver, *v); + /* check conversions number -> integer types */ + lua_pushnumber(L, -(lua_Number)0x1234); + if (lua_tointeger(L, -1) != -0x1234 || + lua_tounsigned(L, -1) != (lua_Unsigned)-0x1234) + luaL_error(L, "bad conversion number->int;" + " must recompile Lua with proper settings"); + lua_pop(L, 1); } - |