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fs/romfs/fs_romfsutil.c: Make romfs_devread32 more portable

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anchao 2018-08-26 13:03:01 -06:00 committed by Gregory Nutt
parent a0f7d7d014
commit 18e5e75008
1 changed files with 4 additions and 26 deletions
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30
fs/romfs/fs_romfsutil.c
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@ -61,22 +61,6 @@
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: romfs_swap32
*
* Description:
* Convert the 32-bit big endian value to little endian
*
****************************************************************************/
#ifndef CONFIG_ENDIAN_BIG
static inline uint32_t romfs_swap32(uint32_t value)
{
return ((((value) & 0x000000ff) << 24) | (((value) & 0x0000ff00) << 8) |
(((value) & 0x00ff0000) >> 8) | (((value) & 0xff000000) >> 24));
}
#endif
/****************************************************************************
* Name: romfs_devread32
*
@ -90,16 +74,10 @@ static inline uint32_t romfs_swap32(uint32_t value)
static uint32_t romfs_devread32(struct romfs_mountpt_s *rm, int ndx)
{
/* Extract the value */
uint32_t value = *(FAR uint32_t *)&rm->rm_buffer[ndx];
/* Value is begin endian -- return the native host endian-ness. */
#ifdef CONFIG_ENDIAN_BIG
return value;
#else
return romfs_swap32(value);
#endif
return ((((uint32_t)rm->rm_buffer[ndx] & 0xff) << 24) |
(((uint32_t)rm->rm_buffer[ndx + 1] & 0xff) << 16) |
(((uint32_t)rm->rm_buffer[ndx + 2] & 0xff) << 8) |
((uint32_t)rm->rm_buffer[ndx + 3] & 0xff));
}
/****************************************************************************