diff options
Diffstat (limited to 'source/LuaExpat/lxplib.c')
| -rw-r--r-- | source/LuaExpat/lxplib.c | 599 |
1 files changed, 0 insertions, 599 deletions
diff --git a/source/LuaExpat/lxplib.c b/source/LuaExpat/lxplib.c deleted file mode 100644 index e26343ce9..000000000 --- a/source/LuaExpat/lxplib.c +++ /dev/null @@ -1,599 +0,0 @@ -/* -** $Id: lxplib.c,v 1.16 2007/06/05 20:03:12 carregal Exp $ -** LuaExpat: Lua bind for Expat library -** See Copyright Notice in license.html -*/ - - -#include <assert.h> -#include <stdlib.h> -#include <string.h> - -#include "expat.h" - -#include "lua.h" -#include "lauxlib.h" - - -#include "lxplib.h" - - -#if !defined(lua_pushliteral) -#define lua_pushliteral(L, s) \ - lua_pushstring(L, "" s, (sizeof(s)/sizeof(char))-1) -#endif - - -enum XPState { - XPSpre, /* parser just initialized */ - XPSok, /* state while parsing */ - XPSfinished, /* state after finished parsing */ - XPSerror, - XPSstring /* state while reading a string */ -}; - -struct lxp_userdata { - lua_State *L; - XML_Parser parser; /* associated expat parser */ - int tableref; /* table with callbacks for this parser */ - enum XPState state; - luaL_Buffer *b; /* to concatenate sequences of cdata pieces */ -}; - -typedef struct lxp_userdata lxp_userdata; - - -static int reporterror (lxp_userdata *xpu) { - lua_State *L = xpu->L; - XML_Parser p = xpu->parser; - lua_pushnil(L); - lua_pushstring(L, XML_ErrorString(XML_GetErrorCode(p))); - lua_pushnumber(L, XML_GetCurrentLineNumber(p)); - lua_pushnumber(L, XML_GetCurrentColumnNumber(p) + 1); - lua_pushnumber(L, XML_GetCurrentByteIndex(p) + 1); - return 5; -} - - -static lxp_userdata *createlxp (lua_State *L) { - lxp_userdata *xpu = (lxp_userdata *)lua_newuserdata(L, sizeof(lxp_userdata)); - xpu->tableref = LUA_REFNIL; /* in case of errors... */ - xpu->parser = NULL; - xpu->L = NULL; - xpu->state = XPSpre; - luaL_getmetatable(L, ParserType); - lua_setmetatable(L, -2); - return xpu; -} - - -static void lxpclose (lua_State *L, lxp_userdata *xpu) { - luaL_unref(L, LUA_REGISTRYINDEX, xpu->tableref); - xpu->tableref = LUA_REFNIL; - if (xpu->parser) - XML_ParserFree(xpu->parser); - xpu->parser = NULL; -} - - - - -/* -** Auxiliary function to call a Lua handle -*/ -static void docall (lxp_userdata *xpu, int nargs, int nres) { - lua_State *L = xpu->L; - assert(xpu->state == XPSok); - if (lua_pcall(L, nargs + 1, nres, 0) != 0) { - xpu->state = XPSerror; - luaL_unref(L, LUA_REGISTRYINDEX, xpu->tableref); - xpu->tableref = luaL_ref(L, LUA_REGISTRYINDEX); /* error message */ - } -} - - -/* -** Check whether there is pending Cdata, and call its handle if necessary -*/ -static void dischargestring (lxp_userdata *xpu) { - assert(xpu->state == XPSstring); - xpu->state = XPSok; - luaL_pushresult(xpu->b); - docall(xpu, 1, 0); -} - - -/* -** Check whether there is a Lua handle for a given event: If so, -** put it on the stack (to be called later), and also push `self' -*/ -static int getHandle (lxp_userdata *xpu, const char *handle) { - lua_State *L = xpu->L; - if (xpu->state == XPSstring) dischargestring(xpu); - if (xpu->state == XPSerror) - return 0; /* some error happened before; skip all handles */ - lua_pushstring(L, handle); - lua_gettable(L, 3); - if (lua_toboolean(L, -1) == 0) { - lua_pop(L, 1); - return 0; - } - if (!lua_isfunction(L, -1)) { - luaL_error(L, "lxp `%s' callback is not a function", handle); - } - lua_pushvalue(L, 1); /* first argument in every call (self) */ - return 1; -} - - - -/* -** {====================================================== -** Handles -** ======================================================= -*/ - - -static void f_StartCdata (void *ud) { - lxp_userdata *xpu = (lxp_userdata *)ud; - if (getHandle(xpu, StartCdataKey) == 0) return; /* no handle */ - docall(xpu, 0, 0); -} - - -static void f_EndCdataKey (void *ud) { - lxp_userdata *xpu = (lxp_userdata *)ud; - if (getHandle(xpu, EndCdataKey) == 0) return; /* no handle */ - docall(xpu, 0, 0); -} - - -static void f_CharData (void *ud, const char *s, int len) { - lxp_userdata *xpu = (lxp_userdata *)ud; - if (xpu->state == XPSok) { - if (getHandle(xpu, CharDataKey) == 0) return; /* no handle */ - xpu->state = XPSstring; - luaL_buffinit(xpu->L, xpu->b); - } - if (xpu->state == XPSstring) - luaL_addlstring(xpu->b, s, len); -} - - -static void f_Comment (void *ud, const char *data) { - lxp_userdata *xpu = (lxp_userdata *)ud; - if (getHandle(xpu, CommentKey) == 0) return; /* no handle */ - lua_pushstring(xpu->L, data); - docall(xpu, 1, 0); -} - - -static void f_Default (void *ud, const char *data, int len) { - lxp_userdata *xpu = (lxp_userdata *)ud; - if (getHandle(xpu, DefaultKey) == 0) return; /* no handle */ - lua_pushlstring(xpu->L, data, len); - docall(xpu, 1, 0); -} - - -static void f_DefaultExpand (void *ud, const char *data, int len) { - lxp_userdata *xpu = (lxp_userdata *)ud; - if (getHandle(xpu, DefaultExpandKey) == 0) return; /* no handle */ - lua_pushlstring(xpu->L, data, len); - docall(xpu, 1, 0); -} - - -static void f_StartElement (void *ud, const char *name, const char **attrs) { - lxp_userdata *xpu = (lxp_userdata *)ud; - lua_State *L = xpu->L; - int lastspec = XML_GetSpecifiedAttributeCount(xpu->parser) / 2; - int i = 1; - if (getHandle(xpu, StartElementKey) == 0) return; /* no handle */ - lua_pushstring(L, name); - lua_newtable(L); - while (*attrs) { - if (i <= lastspec) { - lua_pushnumber(L, i++); - lua_pushstring(L, *attrs); - lua_settable(L, -3); - } - lua_pushstring(L, *attrs++); - lua_pushstring(L, *attrs++); - lua_settable(L, -3); - } - docall(xpu, 2, 0); /* call function with self, name, and attributes */ -} - - -static void f_EndElement (void *ud, const char *name) { - lxp_userdata *xpu = (lxp_userdata *)ud; - if (getHandle(xpu, EndElementKey) == 0) return; /* no handle */ - lua_pushstring(xpu->L, name); - docall(xpu, 1, 0); -} - - -static int f_ExternaEntity (XML_Parser p, const char *context, - const char *base, - const char *systemId, - const char *publicId) { - lxp_userdata *xpu = (lxp_userdata *)XML_GetUserData(p); - lua_State *L = xpu->L; - lxp_userdata *child; - int status; - if (getHandle(xpu, ExternalEntityKey) == 0) return 1; /* no handle */ - child = createlxp(L); - child->parser = XML_ExternalEntityParserCreate(p, context, NULL); - if (!child->parser) - luaL_error(L, "XML_ParserCreate failed"); - lua_rawgeti(L, LUA_REGISTRYINDEX, xpu->tableref); /*lua_getref(L, xpu->tableref); */ /* child uses the same table of its father */ - child->tableref = luaL_ref(L, LUA_REGISTRYINDEX); - lua_pushstring(L, base); - lua_pushstring(L, systemId); - lua_pushstring(L, publicId); - docall(xpu, 4, 1); - status = lua_toboolean(L, -1); - lua_pop(L, 1); - lxpclose(L, child); - return status; -} - - -static void f_StartNamespaceDecl (void *ud, const char *prefix, - const char *uri) { - lxp_userdata *xpu = (lxp_userdata *)ud; - lua_State *L = xpu->L; - if (getHandle(xpu, StartNamespaceDeclKey) == 0) return; /* no handle */ - lua_pushstring(L, prefix); - lua_pushstring(L, uri); - docall(xpu, 2, 0); -} - - -static void f_EndNamespaceDecl (void *ud, const char *prefix) { - lxp_userdata *xpu = (lxp_userdata *)ud; - if (getHandle(xpu, EndNamespaceDeclKey) == 0) return; /* no handle */ - lua_pushstring(xpu->L, prefix); - docall(xpu, 1, 0); -} - - -static void f_NotationDecl (void *ud, const char *notationName, - const char *base, - const char *systemId, - const char *publicId) { - lxp_userdata *xpu = (lxp_userdata *)ud; - lua_State *L = xpu->L; - if (getHandle(xpu, NotationDeclKey) == 0) return; /* no handle */ - lua_pushstring(L, notationName); - lua_pushstring(L, base); - lua_pushstring(L, systemId); - lua_pushstring(L, publicId); - docall(xpu, 4, 0); -} - - -static int f_NotStandalone (void *ud) { - int status; - lxp_userdata *xpu = (lxp_userdata *)ud; - lua_State *L = xpu->L; - if (getHandle(xpu, NotStandaloneKey) == 0) return 1; /* no handle */ - docall(xpu, 0, 1); - status = lua_toboolean(L, -1); - lua_pop(L, 1); - return status; -} - - -static void f_ProcessingInstruction (void *ud, const char *target, - const char *data) { - lxp_userdata *xpu = (lxp_userdata *)ud; - lua_State *L = xpu->L; - if (getHandle(xpu, ProcessingInstructionKey) == 0) return; /* no handle */ - lua_pushstring(L, target); - lua_pushstring(L, data); - docall(xpu, 2, 0); -} - - -static void f_UnparsedEntityDecl (void *ud, const char *entityName, - const char *base, - const char *systemId, - const char *publicId, - const char *notationName) { - lxp_userdata *xpu = (lxp_userdata *)ud; - lua_State *L = xpu->L; - if (getHandle(xpu, UnparsedEntityDeclKey) == 0) return; /* no handle */ - lua_pushstring(L, entityName); - lua_pushstring(L, base); - lua_pushstring(L, systemId); - lua_pushstring(L, publicId); - lua_pushstring(L, notationName); - docall(xpu, 5, 0); -} - -static void f_StartDoctypeDecl (void *ud, const XML_Char *doctypeName, - const XML_Char *sysid, - const XML_Char *pubid, - int has_internal_subset) { - lxp_userdata *xpu = (lxp_userdata *)ud; - if (getHandle(xpu, StartDoctypeDeclKey) == 0) return; /* no handle */ - lua_pushstring(xpu->L, doctypeName); - lua_pushstring(xpu->L, sysid); - lua_pushstring(xpu->L, pubid); - lua_pushboolean(xpu->L, has_internal_subset); - docall(xpu, 4, 0); -} - -/* }====================================================== */ - - - -static int hasfield (lua_State *L, const char *fname) { - int res; - lua_pushstring(L, fname); - lua_gettable(L, 1); - res = !lua_isnil(L, -1); - lua_pop(L, 1); - return res; -} - - -static void checkcallbacks (lua_State *L) { - static const char *const validkeys[] = { - "StartCdataSection", "EndCdataSection", "CharacterData", "Comment", - "Default", "DefaultExpand", "StartElement", "EndElement", - "ExternalEntityRef", "StartNamespaceDecl", "EndNamespaceDecl", - "NotationDecl", "NotStandalone", "ProcessingInstruction", - "UnparsedEntityDecl", "StartDoctypeDecl", NULL}; - if (hasfield(L, "_nonstrict")) return; - lua_pushnil(L); - while (lua_next(L, 1)) { - lua_pop(L, 1); /* remove value */ -#if ! defined (LUA_VERSION_NUM) || LUA_VERSION_NUM < 501 - if (lua_type(L, -1) != LUA_TSTRING || - luaL_findstring(lua_tostring(L, -1), validkeys) < 0) - luaL_error(L, "invalid key `%s' in callback table", lua_tostring(L, -1)); -#else - luaL_checkoption(L, -1, NULL, validkeys); -#endif - } -} - - -static int lxp_make_parser (lua_State *L) { - XML_Parser p; - char sep = *luaL_optstring(L, 2, ""); - lxp_userdata *xpu = createlxp(L); - p = xpu->parser = (sep == '\0') ? XML_ParserCreate(NULL) : - XML_ParserCreateNS(NULL, sep); - if (!p) - luaL_error(L, "XML_ParserCreate failed"); - luaL_checktype(L, 1, LUA_TTABLE); - checkcallbacks(L); - lua_pushvalue(L, 1); - xpu->tableref = luaL_ref(L, LUA_REGISTRYINDEX); - XML_SetUserData(p, xpu); - if (hasfield(L, StartCdataKey) || hasfield(L, EndCdataKey)) - XML_SetCdataSectionHandler(p, f_StartCdata, f_EndCdataKey); - if (hasfield(L, CharDataKey)) - XML_SetCharacterDataHandler(p, f_CharData); - if (hasfield(L, CommentKey)) - XML_SetCommentHandler(p, f_Comment); - if (hasfield(L, DefaultKey)) - XML_SetDefaultHandler(p, f_Default); - if (hasfield(L, DefaultExpandKey)) - XML_SetDefaultHandlerExpand(p, f_DefaultExpand); - if (hasfield(L, StartElementKey) || hasfield(L, EndElementKey)) - XML_SetElementHandler(p, f_StartElement, f_EndElement); - if (hasfield(L, ExternalEntityKey)) - XML_SetExternalEntityRefHandler(p, f_ExternaEntity); - if (hasfield(L, StartNamespaceDeclKey) || hasfield(L, EndNamespaceDeclKey)) - XML_SetNamespaceDeclHandler(p, f_StartNamespaceDecl, f_EndNamespaceDecl); - if (hasfield(L, NotationDeclKey)) - XML_SetNotationDeclHandler(p, f_NotationDecl); - if (hasfield(L, NotStandaloneKey)) - XML_SetNotStandaloneHandler(p, f_NotStandalone); - if (hasfield(L, ProcessingInstructionKey)) - XML_SetProcessingInstructionHandler(p, f_ProcessingInstruction); - if (hasfield(L, UnparsedEntityDeclKey)) - XML_SetUnparsedEntityDeclHandler(p, f_UnparsedEntityDecl); - if (hasfield(L, StartDoctypeDeclKey)) - XML_SetStartDoctypeDeclHandler(p, f_StartDoctypeDecl); - return 1; -} - - -static lxp_userdata *checkparser (lua_State *L, int idx) { - lxp_userdata *xpu = (lxp_userdata *)luaL_checkudata(L, idx, ParserType); - luaL_argcheck(L, xpu, idx, "expat parser expected"); - luaL_argcheck(L, xpu->parser, idx, "parser is closed"); - return xpu; -} - - -static int parser_gc (lua_State *L) { - lxp_userdata *xpu = (lxp_userdata *)luaL_checkudata(L, 1, ParserType); - luaL_argcheck(L, xpu, 1, "expat parser expected"); - lxpclose(L, xpu); - return 0; -} - - -static int setbase (lua_State *L) { - lxp_userdata *xpu = checkparser(L, 1); - if (XML_SetBase(xpu->parser, luaL_checkstring(L, 2)) == 0) - luaL_error(L, "no memory to store base"); - return 0; -} - - -static int getbase (lua_State *L) { - lxp_userdata *xpu = checkparser(L, 1); - lua_pushstring(L, XML_GetBase(xpu->parser)); - return 1; -} - - -static int getcallbacks (lua_State *L) { - lxp_userdata *xpu = checkparser(L, 1); - lua_rawgeti(L, LUA_REGISTRYINDEX, xpu->tableref); - return 1; -} - - -static int parse_aux (lua_State *L, lxp_userdata *xpu, const char *s, - size_t len) { - luaL_Buffer b; - int status; - xpu->L = L; - xpu->state = XPSok; - xpu->b = &b; - lua_settop(L, 2); - lua_rawgeti(L, LUA_REGISTRYINDEX, xpu->tableref); /*lua_getref(L, xpu->tableref);*/ /* to be used by handlers */ - status = XML_Parse(xpu->parser, s, (int)len, s == NULL); - if (xpu->state == XPSstring) dischargestring(xpu); - if (xpu->state == XPSerror) { /* callback error? */ - lua_rawgeti(L, LUA_REGISTRYINDEX, xpu->tableref); /* get original msg. */ - lua_error(L); - } - if (s == NULL) xpu->state = XPSfinished; - if (status) { - lua_pushboolean(L, 1); - return 1; - } - else { /* error */ - return reporterror(xpu); - } -} - - -static int lxp_parse (lua_State *L) { - lxp_userdata *xpu = checkparser(L, 1); - size_t len; - const char *s = luaL_optlstring(L, 2, NULL, &len); - if (xpu->state == XPSfinished && s != NULL) { - lua_pushnil(L); - lua_pushliteral(L, "cannot parse - document is finished"); - return 2; - } - return parse_aux(L, xpu, s, len); -} - - -static int lxp_close (lua_State *L) { - int status = 1; - lxp_userdata *xpu = (lxp_userdata *)luaL_checkudata(L, 1, ParserType); - luaL_argcheck(L, xpu, 1, "expat parser expected"); - if (xpu->state != XPSfinished) - status = parse_aux(L, xpu, NULL, 0); - lxpclose(L, xpu); - if (status > 1) luaL_error(L, "error closing parser: %s", - lua_tostring(L, -status+1)); - return 0; -} - - -static int lxp_pos (lua_State *L) { - lxp_userdata *xpu = checkparser(L, 1); - XML_Parser p = xpu->parser; - lua_pushnumber(L, XML_GetCurrentLineNumber(p)); - lua_pushnumber(L, XML_GetCurrentColumnNumber(p) + 1); - lua_pushnumber(L, XML_GetCurrentByteIndex(p) + 1); - return 3; -} - - -static int lxp_setencoding (lua_State *L) { - lxp_userdata *xpu = checkparser(L, 1); - const char *encoding = luaL_checkstring(L, 2); - luaL_argcheck(L, xpu->state == XPSpre, 1, "invalid parser state"); - XML_SetEncoding(xpu->parser, encoding); - return 0; -} - -static int lxp_stop (lua_State *L) { - lxp_userdata *xpu = checkparser(L, 1); - lua_pushboolean(L, XML_StopParser(xpu->parser, XML_FALSE) == XML_STATUS_OK); - return 1; -} - -#if !defined LUA_VERSION_NUM -/* Lua 5.0 */ -#define luaL_Reg luaL_reg -#endif - -static const struct luaL_Reg lxp_meths[] = { - {"parse", lxp_parse}, - {"close", lxp_close}, - {"__gc", parser_gc}, - {"pos", lxp_pos}, - {"setencoding", lxp_setencoding}, - {"getcallbacks", getcallbacks}, - {"getbase", getbase}, - {"setbase", setbase}, - {"stop", lxp_stop}, - {NULL, NULL} -}; - -static const struct luaL_Reg lxp_funcs[] = { - {"new", lxp_make_parser}, - {NULL, NULL} -}; - - -/* -** Assumes the table is on top of the stack. -*/ -static void set_info (lua_State *L) { - lua_pushliteral (L, "_COPYRIGHT"); - lua_pushliteral (L, "Copyright (C) 2003-2012 Kepler Project"); - lua_settable (L, -3); - lua_pushliteral (L, "_DESCRIPTION"); - lua_pushliteral (L, "LuaExpat is a SAX XML parser based on the Expat library"); - lua_settable (L, -3); - lua_pushliteral (L, "_VERSION"); - lua_pushliteral (L, "LuaExpat 1.3.0"); - lua_settable (L, -3); -} - - -#if !defined LUA_VERSION_NUM || LUA_VERSION_NUM==501 -/* -** Adapted from Lua 5.2.0 -*/ -static void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) { - 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_pushstring(L, l->name); - lua_pushcclosure(L, l->func, nup); /* closure with those upvalues */ - lua_settable(L, -(nup + 3)); - } - lua_pop(L, nup); /* remove upvalues */ -} -#endif - - -int luaopen_lxp (lua_State *L) { - luaL_newmetatable(L, ParserType); - - lua_pushliteral(L, "__index"); - lua_pushvalue(L, -2); - lua_rawset(L, -3); - - luaL_setfuncs (L, lxp_meths, 0); - lua_pop (L, 1); /* remove metatable */ - - // _X 2013_04_09: Modified to allow embedding - luaL_openlib (L, "lxp", lxp_funcs, 0); - /* - lua_newtable (L); - luaL_setfuncs (L, lxp_funcs, 0); - */ - set_info (L); - return 1; -} |