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lib: add STREAM_GETQ, STREAM_GETF

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Signed-off-by: Quentin Young <qlyoung@cumulusnetworks.com>
This commit is contained in:
Quentin Young 2020-03-01 01:20:40 -05:00
parent 3b55aba195
commit c2b5a4e5ff
2 changed files with 41 additions and 0 deletions
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21
lib/stream.c
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@ -543,6 +543,27 @@ uint64_t stream_getq(struct stream *s)
return q;
}
bool stream_getq2(struct stream *s, uint64_t *q)
{
STREAM_VERIFY_SANE(s);
if (STREAM_READABLE(s) < sizeof(uint64_t)) {
STREAM_BOUND_WARN2(s, "get uint64");
return false;
}
*q = ((uint64_t)s->data[s->getp++]) << 56;
*q |= ((uint64_t)s->data[s->getp++]) << 48;
*q |= ((uint64_t)s->data[s->getp++]) << 40;
*q |= ((uint64_t)s->data[s->getp++]) << 32;
*q |= ((uint64_t)s->data[s->getp++]) << 24;
*q |= ((uint64_t)s->data[s->getp++]) << 16;
*q |= ((uint64_t)s->data[s->getp++]) << 8;
*q |= ((uint64_t)s->data[s->getp++]);
return true;
}
/* Get next long word from the stream. */
uint32_t stream_get_ipv4(struct stream *s)
{

20
lib/stream.h
View File

@ -215,6 +215,7 @@ extern bool stream_getl2(struct stream *s, uint32_t *l);
extern uint32_t stream_getl_from(struct stream *, size_t);
extern uint64_t stream_getq(struct stream *);
extern uint64_t stream_getq_from(struct stream *, size_t);
bool stream_getq2(struct stream *s, uint64_t *q);
extern uint32_t stream_get_ipv4(struct stream *);
/* IEEE-754 floats */
@ -402,6 +403,25 @@ static inline const uint8_t *ptr_get_be32(const uint8_t *ptr, uint32_t *out)
(P) = _pval; \
} while (0)
#define STREAM_GETF(S, P) \
do { \
union { \
float r; \
uint32_t d; \
} _pval; \
if (stream_getl2((S), &_pval.d)) \
goto stream_failure; \
(P) = _pval.r; \
} while (0)
#define STREAM_GETQ(S, P) \
do { \
uint64_t _pval; \
if (!stream_getq2((S), &_pval)) \
goto stream_failure; \
(P) = _pval; \
} while (0)
#define STREAM_GET(P, STR, SIZE) \
do { \
if (!stream_get2((P), (STR), (SIZE))) \