On Fri, 15 Sep 2023 16:43:36 +1000 David Gibson <david(a)gibson.dropbear.id.au> wrote:A classic gotcha of the standard C library is that its unwise to call any variable 'index' because it will shadow the standard string library function index(3). This can cause warnings from cppcheck amongst others, and it also means that if the variable is removed you tend to get confusing type errors (or sometimes nothing at all) instead of a nice simple "name is not defined" error. Strictly speaking this only occurs if <string.h> is included, but that is so common that as a rule it's best to just avoid it always. We have a few places in packet.[ch] which hit this trap so rename the variables to avoid it. Signed-off-by: David Gibson <david(a)gibson.dropbear.id.au> --- packet.c | 28 ++++++++++++++-------------- packet.h | 10 +++++----- 2 files changed, 19 insertions(+), 19 deletions(-) diff --git a/packet.c b/packet.c index ce807e2..8e3a87c 100644 --- a/packet.c +++ b/packet.c @@ -33,11 +33,11 @@ void packet_add_do(struct pool *p, size_t len, const char *start, const char *func, int line) { - size_t index = p->count; + size_t idx = p->count; - if (index >= p->size) { + if (idx >= p->size) { trace("add packet index %lu to pool with size %lu, %s:%i", - index, p->size, func, line); + idx, p->size, func, line); return; } @@ -66,8 +66,8 @@ void packet_add_do(struct pool *p, size_t len, const char *start, } #endif - p->pkt[index].offset = start - p->buf; - p->pkt[index].len = len; + p->pkt[idx].offset = start - p->buf; + p->pkt[idx].len = len; p->count++; } @@ -84,13 +84,13 @@ void packet_add_do(struct pool *p, size_t len, const char *start, * * Return: pointer to start of data range, NULL on invalid range or descriptor */ -void *packet_get_do(const struct pool *p, size_t index, size_t offset, +void *packet_get_do(const struct pool *p, size_t idx, size_t offset,Really minor, but... the comment about @index should be updated as well. -- Stefano