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/*
* Support for Intel Camera Imaging ISP subsystem.
* Copyright (c) 2015, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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.
*/
#ifndef __STRING_SUPPORT_H_INCLUDED__
#define __STRING_SUPPORT_H_INCLUDED__
#include <platform_support.h>
#include <type_support.h>
/*
* For all non microsoft cases, we need the following functions
*/
/* @brief Copy from src_buf to dest_buf.
*
* @param[out] dest_buf. Destination buffer to copy to
* @param[in] dest_size. The size of the destination buffer in bytes
* @param[in] src_buf. The source buffer
* @param[in] src_size. The size of the source buffer in bytes
* @return 0 on success, error code on failure
* @return EINVAL on Invalid arguments
* @return ERANGE on Destination size too small
*/
static inline int memcpy_s(
void *dest_buf,
size_t dest_size,
const void *src_buf,
size_t src_size)
{
if ((!src_buf) || (!dest_buf)) {
/* Invalid arguments*/
return EINVAL;
}
if ((dest_size < src_size) || (src_size == 0)) {
/* Destination too small*/
return ERANGE;
}
memcpy(dest_buf, src_buf, src_size);
return 0;
}
/* @brief Get the length of the string, excluding the null terminator
*
* @param[in] src_str. The source string
* @param[in] max_len. Look only for max_len bytes in the string
* @return Return the string length excluding null character
* @return Return max_len if no null character in the first max_len bytes
* @return Returns 0 if src_str is NULL
*/
static size_t strnlen_s(
const char *src_str,
size_t max_len)
{
size_t ix;
if (!src_str) {
/* Invalid arguments*/
return 0;
}
for (ix = 0; ix < max_len && src_str[ix] != '\0'; ix++)
;
/* On Error, it will return src_size == max_len*/
return ix;
}
/* @brief Copy string from src_str to dest_str
*
* @param[out] dest_str. Destination buffer to copy to
* @param[in] dest_size. The size of the destination buffer in bytes
* @param[in] src_str. The source buffer
* @param[in] src_size. The size of the source buffer in bytes
* @return Returns 0 on success
* @return Returns EINVAL on invalid arguments
* @return Returns ERANGE on destination size too small
*/
static inline int strncpy_s(
char *dest_str,
size_t dest_size,
const char *src_str,
size_t src_size)
{
size_t len;
if (!dest_str) {
/* Invalid arguments*/
return EINVAL;
}
if ((!src_str) || (dest_size == 0)) {
/* Invalid arguments*/
dest_str[0] = '\0';
return EINVAL;
}
len = strnlen_s(src_str, src_size);
if (len >= dest_size) {
/* Destination too small*/
dest_str[0] = '\0';
return ERANGE;
}
/* dest_str is big enough for the len */
strncpy(dest_str, src_str, len);
dest_str[len] = '\0';
return 0;
}
/* @brief Copy string from src_str to dest_str
*
* @param[out] dest_str. Destination buffer to copy to
* @param[in] dest_size. The size of the destination buffer in bytes
* @param[in] src_str. The source buffer
* @return Returns 0 on success
* @return Returns EINVAL on invalid arguments
* @return Returns ERANGE on destination size too small
*/
static inline int strcpy_s(
char *dest_str,
size_t dest_size,
const char *src_str)
{
size_t len;
if (!dest_str) {
/* Invalid arguments*/
return EINVAL;
}
if ((!src_str) || (dest_size == 0)) {
/* Invalid arguments*/
dest_str[0] = '\0';
return EINVAL;
}
len = strnlen_s(src_str, dest_size);
if (len >= dest_size) {
/* Destination too small*/
dest_str[0] = '\0';
return ERANGE;
}
/* dest_str is big enough for the len */
strncpy(dest_str, src_str, len);
dest_str[len] = '\0';
return 0;
}
#endif /* __STRING_SUPPORT_H_INCLUDED__ */
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