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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* luaformatmapperutils.cc
*
* Mon Nov 3 08:46:51 CET 2008
* Copyright 2008 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of Pracro.
*
* Pracro is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Pracro is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Pracro; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "luaformatmapperutils.h"
#include "luaformatmapper.h"
#include "mltokenizer.h"
#include <string>
#include <vector>
std::vector< void * > pointers;
#define GLOBAL_PREFIX "magic_global_"
void *getGlobal(lua_State *L, const char *name)
{
unsigned int top;
unsigned int index;
std::string var = std::string(GLOBAL_PREFIX) + name;
lua_getfield(L, LUA_GLOBALSINDEX, var.c_str());
top = lua_gettop(L);
index = lua_tointeger(L, top);
return pointers.at(index);
}
void setGlobal(lua_State *L, const char *name, void *p)
{
// Put the value of this in the globals
char value_of_this[256];
std::string val = std::string(GLOBAL_PREFIX) + name;
pointers.push_back(p);
unsigned int index = pointers.size() - 1;
sprintf(value_of_this, "%s = %u\n", val.c_str(), index);
int s = luaL_loadstring(L, value_of_this);
switch(s) {
case 0: //no errors;
break;
case LUA_ERRSYNTAX: //syntax error during pre-compilation;
case LUA_ERRMEM: //memory allocation error.
fprintf(stderr, "Error: %s\n", lua_tostring(L, lua_gettop(L)));
default:
fprintf(stderr, "Unknown return value of luaL_loadstring.\n");
}
// Run program (init)
s = lua_pcall(L, 0, LUA_MULTRET, 0);
// Check for errors
switch(s) {
case 0: // Success
break;
case LUA_ERRRUN:// a runtime error.
case LUA_ERRMEM:// memory allocation error.
// For such errors, Lua does not call the error handler function.
case LUA_ERRERR:// error while running the error handler function.
fprintf(stderr, "Error: %s\n", lua_tostring(L, lua_gettop(L)));
break;
default:
fprintf(stderr, "Error: Unknown return value of lua_pcall.\n");
break;
}
}
typedef struct {
std::string prefix;
std::string postfix;
} transform_params_t;
std::map< std::string, transform_params_t > transforms;
/**
* Args: mlvalue, bullet, usetext, name1, prefix1, postfix1, name2, prefix2, postfix2, ...
* Iterates list items, prepends bullet, and replaces all name/value pairs with
* corresponding prefix/value/postfix.
*/
int printfmlval(lua_State *L)
{
int n = lua_gettop(L); // number of arguments
if(n < 3 || (n - 3) % 3 != 0) {
char errstr[512];
sprintf(errstr, "Minimum number of args expected 3, got %d", n);
fprintf(stderr, errstr);
lua_pushstring(L, errstr);
lua_error(L);
return 0;
}
std::string mlvalue = lua_tostring(L, lua_gettop(L) - (n - 1));
std::string bullet = lua_tostring(L, lua_gettop(L) - (n - 2));
bool usetext = lua_toboolean(L, lua_gettop(L) - (n - 3));
// printf("[%s], [%s], [%d]\n", mlvalue.c_str(), bullet.c_str(), usetext); fflush(stdout);
// Read in the (prefix, name, postfix) 3-tuples
int m = 4;
while(m < lua_gettop(L)) {
transform_params_t p;
p.prefix = lua_tostring(L, lua_gettop(L) - (n - m));
std::string name = lua_tostring(L, lua_gettop(L) - (n - (m + 1)));
p.postfix = lua_tostring(L, lua_gettop(L) - (n - (m + 2)));
// printf("[%s], [%s], [%s]\n", p.prefix.c_str(), name.c_str(), p.postfix.c_str()); fflush(stdout);
transforms[name] = p;
m += 3;
}
LUAFormatMapper *lfm = (LUAFormatMapper*)getGlobal(L, "LUAFormatMapper");
mltokentype_t lasttype = MLTT_ENDOFITEM;
std::vector< mltoken_t > tokens = mltokenize(mlvalue);
std::vector< mltoken_t >::iterator i = tokens.begin();
while(i != tokens.end()) {
if(lasttype == MLTT_ENDOFITEM) lfm->bufferoutput(bullet);
switch(i->type) {
case MLTT_VALUE:
lfm->bufferoutput(transforms[i->name].prefix);
lfm->bufferoutput(i->value);
lfm->bufferoutput(transforms[i->name].postfix);
break;
case MLTT_TEXT:
if(usetext) lfm->bufferoutput(i->value);
break;
case MLTT_ENDOFITEM:
if(usetext) lfm->bufferoutput(i->value);
break;
case MLTT_UNDEFINED:
// Undefined
break;
}
lasttype = i->type;
i++;
}
return 0;
}
int printval(lua_State *L)
{
int n = lua_gettop(L); // number of arguments
if(n != 1) {
char errstr[512];
sprintf(errstr, "Number of args expected 1, got %d", n);
fprintf(stderr, errstr);
lua_pushstring(L, errstr);
lua_error(L);
return 0;
}
std::string value = lua_tostring(L, lua_gettop(L));
LUAFormatMapper *lfm = (LUAFormatMapper*)getGlobal(L, "LUAFormatMapper");
lfm->bufferoutput(value);
return 0;
}
/*
int pg_query(lua_State *L)
{
int n = lua_gettop(L); // number of arguments
if(n != 2) {
char errstr[512];
sprintf(errstr, "Number of args expected 2, got %d", n);
fprintf(stderr, errstr);
lua_pushstring(L, errstr);
lua_error(L);
return 0;
}
std::string query = lua_tostring(L, lua_gettop(L));
unsigned int pg = lua_tointeger(L, lua_gettop(L) - 1);
printf("query [%s]\n", query.c_str());
// lua_createtable(L, 0, 1);
// lua_pushinteger(L, 41);
// lua_rawseti(L, -2, 1);
// lua_setfenv(L, -2);
lua_pushinteger(L, 42);
lua_pushinteger(L, 41);
lua_rawset(L, -3);
return 1;
}
*/
void preload_formatutils(lua_State *L)
{
lua_register(L, "printval", printval);
lua_register(L, "printfmlval", printfmlval);
}
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