From ad541c67761b8aa6da1566802c347cac4018d0c2 Mon Sep 17 00:00:00 2001 From: Dirk Engling Date: Mon, 2 Nov 2026 20:50:24 +0100 Subject: Move the build sources into src/ --- src/ot_iovec.c | 87 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100644 src/ot_iovec.c (limited to 'src/ot_iovec.c') diff --git a/src/ot_iovec.c b/src/ot_iovec.c new file mode 100644 index 0000000..328f160 --- /dev/null +++ b/src/ot_iovec.c @@ -0,0 +1,87 @@ +/* This software was written by Dirk Engling + It is considered beerware. Prost. Skol. Cheers or whatever. */ + +/* System */ +#include +#include + +/* Opentracker */ +#include "ot_iovec.h" + +void *iovec_new_chunk(size_t *iovec_entries, struct iovec **iovector, size_t new_alloc) { + void *new_data; + size_t new_entries = 1 + *iovec_entries; + struct iovec *new_vec = realloc(*iovector, new_entries * sizeof(struct iovec)); + + if (!new_vec) + return NULL; + + *iovector = new_vec; + + /* Only allocate after we have a place to store the pointer */ + new_data = malloc(new_alloc); + if (!new_data) + return NULL; + + new_vec[new_entries - 1].iov_base = new_data; + new_vec[new_entries - 1].iov_len = new_alloc; + + ++*iovec_entries; + return new_data; +} + +void *iovec_append(size_t *iovec_entries, struct iovec **iovector, struct iovec *append_iovector) { + size_t new_entries = *iovec_entries + 1; + struct iovec *new_vec = realloc(*iovector, new_entries * sizeof(struct iovec)); + if (!new_vec) + return NULL; + + /* Take over data from appended iovec */ + new_vec[*iovec_entries].iov_base = append_iovector->iov_base; + new_vec[*iovec_entries].iov_len = append_iovector->iov_len; + + append_iovector->iov_base = NULL; + append_iovector->iov_len = 0; + + *iovector = new_vec; + *iovec_entries = new_entries; + + return new_vec; +} + +void iovec_free(size_t *iovec_entries, struct iovec **iovector) { + size_t i; + for (i = 0; i < *iovec_entries; ++i) + free(((*iovector)[i]).iov_base); + free(*iovector); + *iovector = NULL; + *iovec_entries = 0; +} + +void iovec_trim_last(size_t *iovec_entries, struct iovec **iovector, void *last_ptr) { + if (*iovec_entries) { + char *base = (char *)((*iovector)[*iovec_entries - 1]).iov_base; + size_t new_alloc = ((char *)last_ptr) - base; + + ((*iovector)[*iovec_entries - 1]).iov_base = realloc(base, new_alloc); + ((*iovector)[*iovec_entries - 1]).iov_len = new_alloc; + } +} + +void *iovec_next_chunk(size_t *iovec_entries, struct iovec **iovector, void *last_ptr, size_t new_alloc) { + void *new_data; + + iovec_trim_last(iovec_entries, iovector, last_ptr); + + if (!(new_data = iovec_new_chunk(iovec_entries, iovector, new_alloc))) + iovec_free(iovec_entries, iovector); + + return new_data; +} + +size_t iovec_length(const size_t *iovec_entries, const struct iovec **iovector) { + size_t i, length = 0; + for (i = 0; i < *iovec_entries; ++i) + length += ((*iovector)[i]).iov_len; + return length; +} -- cgit v1.3