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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 <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <unistd.h>
#include "libxl.h"
#include "libxl_internal.h"
#include "libxl_utils.h"
int libxl__error_set(libxl_ctx *ctx, int code)
{
return 0;
}
int libxl__ptr_add(libxl_gc *gc, 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 < gc->alloc_maxsize; i++) {
if (!gc->alloc_ptrs[i]) {
gc->alloc_ptrs[i] = ptr;
return 0;
}
}
/* realloc alloc_ptrs manually with calloc/free/replace */
re = calloc(gc->alloc_maxsize + 25, sizeof(void *));
if (!re)
return -1;
for (i = 0; i < gc->alloc_maxsize; i++)
re[i] = gc->alloc_ptrs[i];
/* assign the next pointer */
re[i] = ptr;
/* replace the old alloc_ptr */
free(gc->alloc_ptrs);
gc->alloc_ptrs = re;
gc->alloc_maxsize += 25;
return 0;
}
void libxl__free_all(libxl_gc *gc)
{
void *ptr;
int i;
for (i = 0; i < gc->alloc_maxsize; i++) {
ptr = gc->alloc_ptrs[i];
gc->alloc_ptrs[i] = NULL;
free(ptr);
}
free(gc->alloc_ptrs);
}
void *libxl__zalloc(libxl_gc *gc, int bytes)
{
void *ptr = calloc(bytes, 1);
if (!ptr) {
libxl__error_set(libxl_gc_owner(gc), ENOMEM);
return NULL;
}
libxl__ptr_add(gc, ptr);
return ptr;
}
void *libxl__calloc(libxl_gc *gc, size_t nmemb, size_t size)
{
void *ptr = calloc(nmemb, size);
if (!ptr) {
libxl__error_set(libxl_gc_owner(gc), ENOMEM);
return NULL;
}
libxl__ptr_add(gc, ptr);
return ptr;
}
char *libxl__sprintf(libxl_gc *gc, 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(gc, ret + 1);
if (s) {
va_start(ap, fmt);
ret = vsnprintf(s, ret + 1, fmt, ap);
va_end(ap);
}
return s;
}
char *libxl__strdup(libxl_gc *gc, const char *c)
{
char *s = strdup(c);
if (s)
libxl__ptr_add(gc, s);
return s;
}
char *libxl__dirname(libxl_gc *gc, const char *s)
{
char *c;
char *ptr = libxl__strdup(gc, s);
c = strrchr(ptr, '/');
if (!c)
return NULL;
*c = '\0';
return ptr;
}
void xl_logv(libxl_ctx *ctx, xentoollog_level msglevel, int errnoval,
const char *file, int line, const char *func,
char *fmt, va_list ap)
{
char *enomem = "[out of memory formatting log message]";
char *base = NULL;
int rc, esave;
char fileline[256];
esave = errno;
rc = vasprintf(&base, fmt, ap);
if (rc<0) { base = enomem; goto x; }
fileline[0] = 0;
if (file) snprintf(fileline, sizeof(fileline), "%s:%d",file,line);
fileline[sizeof(fileline)-1] = 0;
x:
xtl_log(ctx->lg, msglevel, errnoval, "libxl",
"%s%s%s%s" "%s",
fileline, func&&file?":":"", func?func:"", func||file?" ":"",
base);
if (base != enomem) free(base);
errno = esave;
}
void xl_log(libxl_ctx *ctx, xentoollog_level msglevel, int errnoval,
const char *file, int line, const char *func,
char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
xl_logv(ctx, msglevel, errnoval, file, line, func, fmt, ap);
va_end(ap);
}
char *libxl__abs_path(libxl_gc *gc, char *s, const char *path)
{
if (!s || s[0] == '/')
return s;
return libxl__sprintf(gc, "%s/%s", path, s);
}
int libxl__file_reference_map(libxl_file_reference *f)
{
struct stat st_buf;
int ret, fd;
void *data;
if (f->mapped)
return 0;
fd = open(f->path, O_RDONLY);
if (f < 0)
return ERROR_FAIL;
ret = fstat(fd, &st_buf);
if (ret < 0)
goto out;
ret = -1;
data = mmap(NULL, st_buf.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
if (data == NULL)
goto out;
f->mapped = 1;
f->data = data;
f->size = st_buf.st_size;
ret = 0;
out:
close(fd);
return ret == 0 ? 0 : ERROR_FAIL;
}
int libxl__file_reference_unmap(libxl_file_reference *f)
{
int ret;
if (!f->mapped)
return 0;
ret = munmap(f->data, f->size);
return ret == 0 ? 0 : ERROR_FAIL;
}
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