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netutils/codecs/base64.c: Add base64_[de|en]code_length() API

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ligd 2019-01-27 07:20:25 -06:00 committed by Gregory Nutt
parent 4d2f580568
commit 557cd8e454
2 changed files with 20 additions and 0 deletions
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2
include/netutils/base64.h
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@ -68,8 +68,10 @@ extern "C"
****************************************************************************/
#ifdef CONFIG_CODECS_BASE64
size_t base64_encode_length(size_t len);
FAR void *base64_encode(FAR const void *src, size_t len, FAR void *dst,
FAR size_t *out_len);
size_t base64_decode_length(size_t len);
FAR void *base64_decode(FAR const void *src, size_t len, FAR void *dst,
FAR size_t *out_len);
FAR void *base64w_encode(FAR const void *src, size_t len, FAR void *dst,

18
netutils/codecs/base64.c
View File

@ -256,6 +256,15 @@ static char *_base64_decode(FAR const char *src, size_t len, FAR char *dst,
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: base64_encode_length
****************************************************************************/
size_t base64_encode_length(size_t len)
{
return (len + 2) / 3 * 4;
}
/****************************************************************************
* Name: base64_encode
****************************************************************************/
@ -266,6 +275,15 @@ FAR void *base64_encode(FAR const void *src, size_t len, FAR void *dst,
return _base64_encode(src, len, dst, out_len, false);
}
/****************************************************************************
* Name: base64_decode_length
****************************************************************************/
size_t base64_decode_length(size_t len)
{
return len * 3 / 4;
}
/****************************************************************************
* Name: base64_decode
****************************************************************************/