mirror of git://erdgeist.org/opentracker
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
/* This software was written by Dirk Engling <erdgeist@erdgeist.org>
|
|
It is considered beerware. Prost. Skol. Cheers or whatever.
|
|
|
|
$id$ */
|
|
|
|
/* System */
|
|
#include <stdlib.h>
|
|
#include <sys/types.h>
|
|
#include <sys/uio.h>
|
|
#include <unistd.h>
|
|
|
|
/* Libowfat */
|
|
|
|
/* Opentracker */
|
|
#include "ot_iovec.h"
|
|
|
|
void *iovec_increase(int *iovec_entries, struct iovec **iovector, size_t new_alloc) {
|
|
void *new_data;
|
|
int new_entries = 1 + *iovec_entries;
|
|
struct iovec *new_vec = realloc(*iovector, new_entries * sizeof(struct iovec));
|
|
|
|
if (!new_vec)
|
|
return NULL;
|
|
|
|
/* 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;
|
|
|
|
*iovector = new_vec;
|
|
++*iovec_entries;
|
|
return new_data;
|
|
}
|
|
|
|
void *iovec_append(int *iovec_entries, struct iovec **iovector, struct iovec *append_iovector) {
|
|
int 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(int *iovec_entries, struct iovec **iovector) {
|
|
int i;
|
|
for (i = 0; i < *iovec_entries; ++i)
|
|
free(((*iovector)[i]).iov_base);
|
|
*iovector = NULL;
|
|
*iovec_entries = 0;
|
|
}
|
|
|
|
void iovec_fixlast(int *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_fix_increase_or_free(int *iovec_entries, struct iovec **iovector, void *last_ptr, size_t new_alloc) {
|
|
void *new_data;
|
|
|
|
iovec_fixlast(iovec_entries, iovector, last_ptr);
|
|
|
|
if (!(new_data = iovec_increase(iovec_entries, iovector, new_alloc)))
|
|
iovec_free(iovec_entries, iovector);
|
|
|
|
return new_data;
|
|
}
|
|
|
|
size_t iovec_length(const int *iovec_entries, const struct iovec **iovector) {
|
|
size_t length = 0;
|
|
int i;
|
|
for (i = 0; i < *iovec_entries; ++i)
|
|
length += ((*iovector)[i]).iov_len;
|
|
return length;
|
|
}
|
|
|
|
const char *g_version_iovec_c = "$Source$: $Revision$\n";
|