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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* Monkey HTTP Server
* ==================
* Copyright 2001-2017 Eduardo Silva <eduardo@monkey.io>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define _GNU_SOURCE
#include <fcntl.h>
//#include <sys/mman.h>
#include <errno.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <mk_core/mk_macros.h>
#include <mk_core/mk_memory.h>
#include <mk_core/mk_iov.h>
#include <mk_core/mk_uio.h>
const mk_ptr_t mk_iov_crlf = mk_ptr_init(MK_IOV_CRLF);
const mk_ptr_t mk_iov_lf = mk_ptr_init(MK_IOV_LF);
const mk_ptr_t mk_iov_space = mk_ptr_init(MK_IOV_SPACE);
const mk_ptr_t mk_iov_slash = mk_ptr_init(MK_IOV_SLASH);
const mk_ptr_t mk_iov_none = mk_ptr_init(MK_IOV_NONE);
const mk_ptr_t mk_iov_equal = mk_ptr_init(MK_IOV_EQUAL);
struct mk_iov *mk_iov_create(int n, int offset)
{
int s_all;
int s_iovec;
int s_free_buf;
void *p;
struct mk_iov *iov;
s_all = sizeof(struct mk_iov); /* main mk_iov structure */
s_iovec = (n * sizeof(struct mk_iovec)); /* iovec array size */
s_free_buf = (n * sizeof(void *)); /* free buf array */
p = mk_mem_alloc_z(s_all + s_iovec + s_free_buf);
if (!p) {
return NULL;
}
/* Set pointer address */
iov = p;
iov->io = (struct mk_iovec *)((uint8_t *)p + sizeof(struct mk_iov));
iov->buf_to_free = (void *) ((uint8_t*)p + sizeof(struct mk_iov) + s_iovec);
mk_iov_init(iov, n, offset);
return iov;
}
struct mk_iov *mk_iov_realloc(struct mk_iov *mk_io, int new_size)
{
int i;
struct mk_iov *iov;
/*
* We do not perform a memory realloc because our struct iov have
* self references on it 'io' and 'buf_to_free' pointers. So we create a
* new mk_iov and perform a data migration.
*/
iov = mk_iov_create(new_size, 0);
if (!iov) {
return NULL;
}
/* Migrate data */
iov->iov_idx = mk_io->iov_idx;
iov->buf_idx = mk_io->buf_idx;
iov->size = new_size;
iov->total_len = mk_io->total_len;
for (i = 0; i < mk_io->iov_idx; i++) {
iov->io[i].iov_base = mk_io->io[i].iov_base;
iov->io[i].iov_len = mk_io->io[i].iov_len;
}
for (i = 0; i < mk_io->buf_idx; i++) {
iov->buf_to_free[i] = mk_io->buf_to_free[i];
}
return iov;
}
int mk_iov_set_entry(struct mk_iov *mk_io, void *buf, int len,
int free, int idx)
{
mk_io->io[idx].iov_base = buf;
mk_io->io[idx].iov_len = len;
mk_io->total_len += len;
if (free == MK_TRUE) {
_mk_iov_set_free(mk_io, buf);
}
return 0;
}
ssize_t mk_iov_send(int fd, struct mk_iov *mk_io)
{
ssize_t n = writev(fd, mk_io->io, mk_io->iov_idx);
if (mk_unlikely(n < 0)) {
MK_TRACE( "[FD %i] writev() '%s'", fd, strerror(errno));
return -1;
}
return n;
}
void mk_iov_free(struct mk_iov *mk_io)
{
mk_iov_free_marked(mk_io);
mk_mem_free(mk_io);
mk_io = NULL;
}
void mk_iov_free_marked(struct mk_iov *mk_io)
{
int i, limit = 0;
limit = mk_io->buf_idx;
for (i = 0; i < limit; i++) {
#ifdef DEBUG_IOV
printf("\nDEBUG IOV :: going free (idx: %i/%i): %s", i,
limit, mk_io->buf_to_free[i]);
fflush(stdout);
#endif
mk_mem_free(mk_io->buf_to_free[i]);
}
mk_io->iov_idx = 0;
mk_io->buf_idx = 0;
mk_io->total_len = 0;
}
void mk_iov_print(struct mk_iov *mk_io)
{
int i;
unsigned j;
char *c;
for (i = 0; i < mk_io->iov_idx; i++) {
printf("\n[index=%i len=%i]\n'", i, (int) mk_io->io[i].iov_len);
fflush(stdout);
for (j=0; j < mk_io->io[i].iov_len; j++) {
c = mk_io->io[i].iov_base;
printf("%c", c[j]);
fflush(stdout);
}
printf("'[end=%i]\n", j);
fflush(stdout);
}
}
int mk_iov_consume(struct mk_iov *mk_io, size_t bytes)
{
int i;
size_t len;
if (mk_io->total_len == bytes) {
mk_io->total_len = 0;
mk_io->iov_idx = 0;
return 0;
}
for (i = 0; i < mk_io->iov_idx; i++) {
len = mk_io->io[i].iov_len;
if (len == 0) {
continue;
}
if (bytes < len) {
mk_io->io[i].iov_base = (uint8_t *)mk_io->io[i].iov_base + bytes;
mk_io->io[i].iov_len = (len - bytes);
break;
}
else if (bytes == len) {
/* this entry was consumed */
mk_io->io[i].iov_len = 0;
break;
}
else {
/* bytes > 0, consume this entry */
mk_io->io[i].iov_len = 0;
bytes -= len;
}
}
mk_io->total_len -= (unsigned long)bytes;
return 0;
}
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