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/*
* libiio - Library for interfacing industrial I/O (IIO) devices
*
* Copyright (C) 2016 Analog Devices, Inc.
* Author: Paul Cercueil <paul.cercueil@analog.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
#include "iio-config.h"
#include "iio-private.h"
#include <errno.h>
#include <stdbool.h>
#include <string.h>
struct iio_scan_context {
#ifdef WITH_USB_BACKEND
struct iio_scan_backend_context *usb_ctx;
#endif
bool scan_local;
};
const char * iio_context_info_get_description(
const struct iio_context_info *info)
{
return info->description;
}
const char * iio_context_info_get_uri(
const struct iio_context_info *info)
{
return info->uri;
}
ssize_t iio_scan_context_get_info_list(struct iio_scan_context *ctx,
struct iio_context_info ***info)
{
struct iio_scan_result scan_result = { 0, NULL };
#ifdef WITH_LOCAL_BACKEND
if (ctx->scan_local) {
int ret = local_context_scan(&scan_result);
if (ret < 0) {
if (scan_result.info)
iio_context_info_list_free(scan_result.info);
return ret;
}
}
#endif
#ifdef WITH_USB_BACKEND
if (ctx->usb_ctx) {
int ret = usb_context_scan(ctx->usb_ctx, &scan_result);
if (ret < 0) {
if (scan_result.info)
iio_context_info_list_free(scan_result.info);
return ret;
}
}
#endif
*info = scan_result.info;
return (ssize_t) scan_result.size;
}
void iio_context_info_list_free(struct iio_context_info **list)
{
struct iio_context_info **it;
if (!list)
return;
for (it = list; *it; it++) {
struct iio_context_info *info = *it;
if (info->description)
free(info->description);
if (info->uri)
free(info->uri);
free(info);
}
free(list);
}
struct iio_context_info ** iio_scan_result_add(
struct iio_scan_result *scan_result, size_t num)
{
struct iio_context_info **info;
size_t old_size, new_size;
size_t i;
old_size = scan_result->size;
new_size = old_size + num;
info = realloc(scan_result->info, (new_size + 1) * sizeof(*info));
if (!info)
return NULL;
scan_result->info = info;
scan_result->size = new_size;
for (i = old_size; i < new_size; i++) {
/* Make sure iio_context_info_list_free won't overflow */
info[i + 1] = NULL;
info[i] = zalloc(sizeof(**info));
if (!info[i])
return NULL;
}
return &info[old_size];
}
struct iio_scan_context * iio_create_scan_context(
const char *backend, unsigned int flags)
{
struct iio_scan_context *ctx;
/* "flags" must be zero for now */
if (flags != 0) {
errno = EINVAL;
return NULL;
}
ctx = calloc(1, sizeof(*ctx));
if (!ctx) {
errno = ENOMEM;
return NULL;
}
if (!backend || !strcmp(backend, "local"))
ctx->scan_local = true;
#ifdef WITH_USB_BACKEND
if (!backend || !strcmp(backend, "usb"))
ctx->usb_ctx = usb_context_scan_init();
#endif
return ctx;
}
void iio_scan_context_destroy(struct iio_scan_context *ctx)
{
#ifdef WITH_USB_BACKEND
if (ctx->usb_ctx)
usb_context_scan_free(ctx->usb_ctx);
#endif
free(ctx);
}
#ifdef WITH_MATLAB_BINDINGS_API
struct iio_scan_block {
struct iio_scan_context *ctx;
struct iio_context_info **info;
ssize_t ctx_cnt;
};
ssize_t iio_scan_block_scan(struct iio_scan_block *blk)
{
iio_context_info_list_free(blk->info);
blk->info = NULL;
blk->ctx_cnt = iio_scan_context_get_info_list(blk->ctx, &blk->info);
return blk->ctx_cnt;
}
struct iio_context_info *iio_scan_block_get_info(
struct iio_scan_block *blk, unsigned int index)
{
if (!blk->info || (ssize_t)index >= blk->ctx_cnt) {
errno = EINVAL;
return NULL;
}
return blk->info[index];
}
struct iio_scan_block *iio_create_scan_block(
const char *backend, unsigned int flags)
{
struct iio_scan_block *blk;
blk = calloc(1, sizeof(*blk));
if (!blk) {
errno = ENOMEM;
return NULL;
}
blk->ctx = iio_create_scan_context(backend, flags);
if (!blk->ctx) {
free(blk);
return NULL;
}
return blk;
}
void iio_scan_block_destroy(struct iio_scan_block *blk)
{
iio_context_info_list_free(blk->info);
iio_scan_context_destroy(blk->ctx);
free(blk);
}
#endif
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