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/*
* author: Aurelien Marchand
* licence: GPL
* date: 20/06/03
*
*/
#ifndef _WIN32
# include <dlfcn.h>
#endif
#include "globals.h"
#include "linked.h"
#include <stdio.h>
#include <stdlib.h>
char* plug_error(void) {
// Colourless: Unix specific part. Add your #def here
#ifdef _WIN32
HRESULT hRes = GetLastError();
if (FAILED(hRes)) {
static TCHAR lpMsgBuf[256];
FormatMessage(
FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, GetLastError(),
MAKELANGID(
LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
lpMsgBuf, 256, NULL);
return lpMsgBuf;
} else {
return 0;
}
#else
return dlerror();
#endif
}
libhandle_t plug_load(char* plug_name) {
libhandle_t a_hdl;
// Colourless: Unix specific part. Add your #def here
#ifdef _WIN32
a_hdl = LoadLibrary(plug_name);
#else
a_hdl = dlopen(plug_name, RTLD_LAZY);
#endif
if (!a_hdl) {
fprintf(stderr, "%s\n", plug_error());
return NULL;
}
return a_hdl;
}
int plug_unload(libhandle_t a_hdl) {
// in linux, dlclose return 0 when success and non-zero on error, so let's
// invert that to be consistant with the rest in Windows, FreeLibrary
// returns 0 on failure, non zero on success Colourless: Unix specific part.
// Add your #def here
#ifdef _WIN32
return FreeLibrary(a_hdl);
#else
return !dlclose(a_hdl);
#endif
}
void* plug_load_func(libhandle_t a_hdl, const char* func_name) {
// Colourless: Unix specific part. Add your #def here
#ifdef _WIN32
// Need to add _ to the start of the function names in windows
// TCHAR strProcName[256] = "_";
// strncat(strProcName, func_name, 256);
void* ret;
*(FARPROC*)&ret = GetProcAddress(a_hdl, func_name);
return ret;
#else
return dlsym(a_hdl, func_name);
#endif
}
int add_plugin_apply(int col_index, libhandle_t a_hdl) {
// NOTE: It is necessary to add the handle AT THE END of the list for index
// col_index
// since the last transforming must have the priority (by design)
// add a node to action_table[col_index] that points to handle's apply
// function
// special case: action_table[col_index] == NULL
// otherwise, cursor=action_table[col_index]
// while (cursor->next) != NULL
// cursor = cursor->next;
// insert new node at cursor->next, with handle as the pointer to
// plugin_apply
// colour_hex(*apply)(colour_hex,glob_variables *);
// first of all, load a_hdl's apply function
pfnPluginApply apply;
*(void**)&apply = plug_load_func(a_hdl, "plugin_apply");
char* error = plug_error();
if (error != NULL) {
fprintf(stderr, "%s\n", error);
return -1;
}
node* new_node = create_node();
if (new_node == NULL) {
// problem
fprintf(stderr, "Couldn't create node\n");
return -1;
}
new_node->plugin_apply = apply;
// add new_node at end of list found on action_table[idx]
// dealing with the special case
if (action_table[col_index] == NULL) {
action_table[col_index] = new_node;
} else {
// go to the end and add it there
node* cursor = action_table[col_index];
while (cursor->next != NULL) {
cursor = cursor->next;
}
// cursor->next == NULL
cursor->next = new_node;
}
// all done
return 0;
}
int add_plugin_parse(char* line, libhandle_t a_hdl) {
int (*teach)(char*);
*(void**)&teach = plug_load_func(a_hdl, "plugin_parse");
char* error = plug_error();
if (error != NULL) {
fprintf(stderr, "%s\n", error);
return -1;
}
return (*teach)(line);
}
node* add_handle(libhandle_t a_hdl, node* list) {
// add a node to list that points to handle
// create a node with a_hdl as node->a_hdl value and list as node->next
// value insert node at head;
node* new_head = create_node();
if (new_head == NULL) {
// problem
fprintf(stderr, "WARNING: couldn't create node\n");
return NULL;
} else {
new_head->next = list;
new_head->handle = a_hdl;
}
return new_head;
}
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