Enrico Granata | 19d8880 | 2019-04-29 16:28:35 -0700 | [diff] [blame] | 1 | /* |
| 2 | * libiio - Library for interfacing industrial I/O (IIO) devices |
| 3 | * |
| 4 | * Copyright (C) 2016 Analog Devices, Inc. |
| 5 | * Author: Paul Cercueil <paul.cercueil@analog.com> |
| 6 | * |
| 7 | * This library is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * This library is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | */ |
| 17 | |
| 18 | #include "iio-config.h" |
| 19 | #include "iio-private.h" |
| 20 | |
| 21 | #include <errno.h> |
| 22 | #include <stdbool.h> |
| 23 | #include <string.h> |
| 24 | |
| 25 | struct iio_scan_context { |
| 26 | #ifdef WITH_USB_BACKEND |
| 27 | struct iio_scan_backend_context *usb_ctx; |
| 28 | #endif |
| 29 | bool scan_local; |
| 30 | }; |
| 31 | |
| 32 | const char * iio_context_info_get_description( |
| 33 | const struct iio_context_info *info) |
| 34 | { |
| 35 | return info->description; |
| 36 | } |
| 37 | |
| 38 | const char * iio_context_info_get_uri( |
| 39 | const struct iio_context_info *info) |
| 40 | { |
| 41 | return info->uri; |
| 42 | } |
| 43 | |
| 44 | ssize_t iio_scan_context_get_info_list(struct iio_scan_context *ctx, |
| 45 | struct iio_context_info ***info) |
| 46 | { |
| 47 | struct iio_scan_result scan_result = { 0, NULL }; |
| 48 | |
| 49 | #ifdef WITH_LOCAL_BACKEND |
| 50 | if (ctx->scan_local) { |
| 51 | int ret = local_context_scan(&scan_result); |
| 52 | if (ret < 0) { |
| 53 | if (scan_result.info) |
| 54 | iio_context_info_list_free(scan_result.info); |
| 55 | return ret; |
| 56 | } |
| 57 | } |
| 58 | #endif |
| 59 | |
| 60 | #ifdef WITH_USB_BACKEND |
| 61 | if (ctx->usb_ctx) { |
| 62 | int ret = usb_context_scan(ctx->usb_ctx, &scan_result); |
| 63 | if (ret < 0) { |
| 64 | if (scan_result.info) |
| 65 | iio_context_info_list_free(scan_result.info); |
| 66 | return ret; |
| 67 | } |
| 68 | } |
| 69 | #endif |
| 70 | |
| 71 | *info = scan_result.info; |
| 72 | |
| 73 | return (ssize_t) scan_result.size; |
| 74 | } |
| 75 | |
| 76 | void iio_context_info_list_free(struct iio_context_info **list) |
| 77 | { |
| 78 | struct iio_context_info **it; |
| 79 | |
| 80 | if (!list) |
| 81 | return; |
| 82 | |
| 83 | for (it = list; *it; it++) { |
| 84 | struct iio_context_info *info = *it; |
| 85 | |
| 86 | if (info->description) |
| 87 | free(info->description); |
| 88 | if (info->uri) |
| 89 | free(info->uri); |
| 90 | free(info); |
| 91 | } |
| 92 | |
| 93 | free(list); |
| 94 | } |
| 95 | |
| 96 | struct iio_context_info ** iio_scan_result_add( |
| 97 | struct iio_scan_result *scan_result, size_t num) |
| 98 | { |
| 99 | struct iio_context_info **info; |
| 100 | size_t old_size, new_size; |
| 101 | size_t i; |
| 102 | |
| 103 | old_size = scan_result->size; |
| 104 | new_size = old_size + num; |
| 105 | |
| 106 | info = realloc(scan_result->info, (new_size + 1) * sizeof(*info)); |
| 107 | if (!info) |
| 108 | return NULL; |
| 109 | |
| 110 | scan_result->info = info; |
| 111 | scan_result->size = new_size; |
| 112 | |
| 113 | for (i = old_size; i < new_size; i++) { |
| 114 | /* Make sure iio_context_info_list_free won't overflow */ |
| 115 | info[i + 1] = NULL; |
| 116 | |
| 117 | info[i] = zalloc(sizeof(**info)); |
| 118 | if (!info[i]) |
| 119 | return NULL; |
| 120 | } |
| 121 | |
| 122 | return &info[old_size]; |
| 123 | } |
| 124 | |
| 125 | struct iio_scan_context * iio_create_scan_context( |
| 126 | const char *backend, unsigned int flags) |
| 127 | { |
| 128 | struct iio_scan_context *ctx; |
| 129 | |
| 130 | /* "flags" must be zero for now */ |
| 131 | if (flags != 0) { |
| 132 | errno = EINVAL; |
| 133 | return NULL; |
| 134 | } |
| 135 | |
| 136 | ctx = calloc(1, sizeof(*ctx)); |
| 137 | if (!ctx) { |
| 138 | errno = ENOMEM; |
| 139 | return NULL; |
| 140 | } |
| 141 | |
| 142 | if (!backend || !strcmp(backend, "local")) |
| 143 | ctx->scan_local = true; |
| 144 | |
| 145 | #ifdef WITH_USB_BACKEND |
| 146 | if (!backend || !strcmp(backend, "usb")) |
| 147 | ctx->usb_ctx = usb_context_scan_init(); |
| 148 | #endif |
| 149 | |
| 150 | return ctx; |
| 151 | } |
| 152 | |
| 153 | void iio_scan_context_destroy(struct iio_scan_context *ctx) |
| 154 | { |
| 155 | #ifdef WITH_USB_BACKEND |
| 156 | if (ctx->usb_ctx) |
| 157 | usb_context_scan_free(ctx->usb_ctx); |
| 158 | #endif |
| 159 | free(ctx); |
| 160 | } |
| 161 | |
| 162 | #ifdef WITH_MATLAB_BINDINGS_API |
| 163 | |
| 164 | struct iio_scan_block { |
| 165 | struct iio_scan_context *ctx; |
| 166 | struct iio_context_info **info; |
| 167 | ssize_t ctx_cnt; |
| 168 | }; |
| 169 | |
| 170 | ssize_t iio_scan_block_scan(struct iio_scan_block *blk) |
| 171 | { |
| 172 | iio_context_info_list_free(blk->info); |
| 173 | blk->info = NULL; |
| 174 | blk->ctx_cnt = iio_scan_context_get_info_list(blk->ctx, &blk->info); |
| 175 | return blk->ctx_cnt; |
| 176 | } |
| 177 | |
| 178 | struct iio_context_info *iio_scan_block_get_info( |
| 179 | struct iio_scan_block *blk, unsigned int index) |
| 180 | { |
| 181 | if (!blk->info || (ssize_t)index >= blk->ctx_cnt) { |
| 182 | errno = EINVAL; |
| 183 | return NULL; |
| 184 | } |
| 185 | return blk->info[index]; |
| 186 | } |
| 187 | |
| 188 | struct iio_scan_block *iio_create_scan_block( |
| 189 | const char *backend, unsigned int flags) |
| 190 | { |
| 191 | struct iio_scan_block *blk; |
| 192 | |
| 193 | blk = calloc(1, sizeof(*blk)); |
| 194 | if (!blk) { |
| 195 | errno = ENOMEM; |
| 196 | return NULL; |
| 197 | } |
| 198 | |
| 199 | blk->ctx = iio_create_scan_context(backend, flags); |
| 200 | if (!blk->ctx) { |
| 201 | free(blk); |
| 202 | return NULL; |
| 203 | } |
| 204 | |
| 205 | return blk; |
| 206 | } |
| 207 | |
| 208 | void iio_scan_block_destroy(struct iio_scan_block *blk) |
| 209 | { |
| 210 | iio_context_info_list_free(blk->info); |
| 211 | iio_scan_context_destroy(blk->ctx); |
| 212 | free(blk); |
| 213 | } |
| 214 | #endif |