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/*
* Copyright (C) 2009 Citrix Ltd.
* Author Vincent Hanquez <vincent.hanquez@eu.citrix.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; version 2.1 only. with the special
* exception on linking described in file LICENSE.
*
* This program 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 Lesser General Public License for more details.
*/
#include "libxl_osdeps.h"
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include "libxl.h"
#include "libxl_internal.h"
#include "libxl_utils.h"
int libxl_error_set(struct libxl_ctx *ctx, int code)
{
return 0;
}
int libxl_ptr_add(struct libxl_ctx *ctx, void *ptr)
{
int i;
void **re;
if (!ptr)
return 0;
/* fast case: we have space in the array for storing the pointer */
for (i = 0; i < ctx->alloc_maxsize; i++) {
if (!ctx->alloc_ptrs[i]) {
ctx->alloc_ptrs[i] = ptr;
return 0;
}
}
/* realloc alloc_ptrs manually with calloc/free/replace */
re = calloc(ctx->alloc_maxsize + 25, sizeof(void *));
if (!re)
return -1;
for (i = 0; i < ctx->alloc_maxsize; i++)
re[i] = ctx->alloc_ptrs[i];
/* assign the next pointer */
re[i] = ptr;
/* replace the old alloc_ptr */
free(ctx->alloc_ptrs);
ctx->alloc_ptrs = re;
ctx->alloc_maxsize += 25;
return 0;
}
int libxl_free(struct libxl_ctx *ctx, void *ptr)
{
int i;
if (!ptr)
return 0;
/* remove the pointer from the tracked ptrs */
for (i = 0; i < ctx->alloc_maxsize; i++) {
if (ctx->alloc_ptrs[i] == ptr) {
ctx->alloc_ptrs[i] = NULL;
free(ptr);
return 0;
}
}
/* haven't find the pointer, really bad */
return -1;
}
int libxl_free_all(struct libxl_ctx *ctx)
{
void *ptr;
int i;
for (i = 0; i < ctx->alloc_maxsize; i++) {
ptr = ctx->alloc_ptrs[i];
ctx->alloc_ptrs[i] = NULL;
free(ptr);
}
return 0;
}
void *libxl_zalloc(struct libxl_ctx *ctx, int bytes)
{
void *ptr = calloc(bytes, 1);
if (!ptr) {
libxl_error_set(ctx, ENOMEM);
return NULL;
}
libxl_ptr_add(ctx, ptr);
return ptr;
}
void *libxl_calloc(struct libxl_ctx *ctx, size_t nmemb, size_t size)
{
void *ptr = calloc(nmemb, size);
if (!ptr) {
libxl_error_set(ctx, ENOMEM);
return NULL;
}
libxl_ptr_add(ctx, ptr);
return ptr;
}
char *libxl_sprintf(struct libxl_ctx *ctx, const char *fmt, ...)
{
char *s;
va_list ap;
int ret;
va_start(ap, fmt);
ret = vsnprintf(NULL, 0, fmt, ap);
va_end(ap);
if (ret < 0) {
return NULL;
}
s = libxl_zalloc(ctx, ret + 1);
if (s) {
va_start(ap, fmt);
ret = vsnprintf(s, ret + 1, fmt, ap);
va_end(ap);
}
return s;
}
char *libxl_dirname(struct libxl_ctx *ctx, const char *s)
{
char *c;
char *ptr = libxl_sprintf(ctx, "%s", s);
c = strrchr(ptr, '/');
if (!c)
return NULL;
*c = '\0';
return ptr;
}
void xl_logv(struct libxl_ctx *ctx, int loglevel, int errnoval,
const char *file, int line, const char *func,
char *fmt, va_list ap)
{
char *enomem = "[out of memory formatting log message]";
char *s;
int rc;
rc = vasprintf(&s, fmt, ap);
if (rc<0) { s = enomem; goto x; }
if (errnoval >= 0) {
char *errstr, *snew;
errstr = strerror(errnoval);
if (errstr)
rc = asprintf(&snew, "%s: %s", s, errstr);
else
rc = asprintf(&snew, "%s: unknown error number %d", s, errnoval);
free(s);
if (rc<0) { s = enomem; goto x; }
s = snew;
}
x:
ctx->log_callback(ctx->log_userdata, loglevel, file, line, func, s);
if (s != enomem)
free(s);
}
void xl_log(struct libxl_ctx *ctx, int loglevel, int errnoval,
const char *file, int line,
const char *func, char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
xl_logv(ctx, loglevel, errnoval, file, line, func, fmt, ap);
va_end(ap);
}
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