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/*
puplug - portable micro plugin framework
Copyright (C) 2017 Tibor 'Igor2' Palinkas
libgpmi - General Package/Module Interface
Copyright (C) 2005-2007 Patric 'TrueLight' Stout & Tibor 'Igor2' Palinkas
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 31 Milk Street, # 960789 Boston, MA 02196 USA.
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "error.h"
#include "os_dep.h"
const char *pup_error_sources_txt[] = {
"Unknown",
"load_dep",
"find_lib",
"load_pup",
"load_lib",
NULL
};
const char *pup_error_txt[] = {
NULL,
"Failed to load library",
"Failed to load plugin",
"Version mismatch",
"Initialization failed",
"Already loading library",
"Found cyclic dependency",
"File not found",
"Plugin-plugin conflict",
"Error parsing the pup file"
};
#define array_len(array) (sizeof(array) / sizeof(char *))
const char *pup_strerror(pup_error_t errnum)
{
/* Check if it is a puplug error */
if ((errnum > -34000) || (errnum < -34000 - array_len(pup_error_txt)))
return NULL;
return pup_error_txt[(-errnum) - 34000];
}
const char *pup_strerror_src(pup_error_source_t srcnum)
{
/* Check if it is a puplug error */
if ((srcnum < 0) || (srcnum >= array_len(pup_error_sources_txt)))
return NULL;
return pup_error_sources_txt[srcnum];
}
pup_error_t pup_err_stack_push(pup_context_t *pup, pup_error_t error, pup_error_source_t from, const char *details)
{
pup_err_stack_t *entry;
/* Don't push anything if the stack is not enabled */
if (!pup->error_stack_enable)
return error;
/* Create the entry */
entry = malloc(sizeof(pup_err_stack_t));
entry->error = error;
entry->from = from;
if (details != NULL)
entry->details = pup_strdup(details);
else
entry->details = NULL;
/* Insert at the beginning of the linked list */
entry->next = pup->err_stack;
pup->err_stack = entry;
return error;
}
pup_err_stack_t *pup_err_stack_pop(pup_context_t *pup)
{
pup_err_stack_t *entry;
/* Get the first record */
entry = pup->err_stack;
/* Set next record so we popped the first */
if (entry != NULL)
pup->err_stack = entry->next;
return entry;
}
void pup_err_stack_destroy(pup_context_t *pup, pup_err_stack_t *entry)
{
pup_err_stack_t *e, *next;
if (entry == NULL) {
/* Destroy the whole stack */
for (e = pup->err_stack; e != NULL; e = next) {
next = e->next;
pup_err_stack_destroy(pup, e);
}
pup->err_stack = NULL;
}
else {
/* Destroy one entry */
if (entry->details != NULL)
free(entry->details);
free(entry);
}
}
char *pup_str_err_stack_entry(pup_err_stack_t *entry)
{
char *tmp, *det;
const char *from, *msg;
msg = pup_strerror(entry->error);
if (msg == NULL)
msg = "(unknown)";
from = pup_strerror_src(entry->from);
if (from == NULL)
from = "(unknown)";
if (entry->details != NULL)
det = entry->details;
else
det = "(empty)";
tmp = malloc(strlen(msg) + strlen(from) + strlen(det) + 32);
sprintf(tmp, "%s(): '%s': '%s'", from, msg, det);
return tmp;
}
void pup_err_stack_process_str(pup_context_t *pup, void (*callback)(pup_err_stack_t *entry, char *string))
{
pup_err_stack_t *entry;
char *str;
assert(callback != NULL);
do {
entry = pup_err_stack_pop(pup);
if (entry != NULL) {
str = pup_str_err_stack_entry(entry);
callback(entry, str);
free(str);
pup_err_stack_destroy(pup, entry);
}
} while(entry != NULL);
}
int pup_err_stack_enable(pup_context_t *pup)
{
int previous;
previous = pup->error_stack_enable;
pup->error_stack_enable = 1;
return previous;
}
int pup_err_stack_disable(pup_context_t *pup)
{
int previous;
previous = pup->error_stack_enable;
pup->error_stack_enable = 0;
return previous;
}
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