diff options
Diffstat (limited to 'context.c')
| -rw-r--r-- | context.c | 437 |
1 files changed, 0 insertions, 437 deletions
diff --git a/context.c b/context.c deleted file mode 100644 index 2b54730..0000000 --- a/context.c +++ /dev/null @@ -1,437 +0,0 @@ -/* - * libiio - Library for interfacing industrial I/O (IIO) devices - * - * Copyright (C) 2014 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 "debug.h" -#include "iio-config.h" -#include "iio-private.h" -#include "sort.h" - -#include <errno.h> -#include <string.h> - -#ifdef _WIN32 -#define LOCAL_BACKEND 0 -#define NETWORK_BACKEND 1 -#endif - -static const char xml_header[] = "<?xml version=\"1.0\" encoding=\"utf-8\"?>" -"<!DOCTYPE context [" -"<!ELEMENT context (device | context-attribute)*>" -"<!ELEMENT context-attribute EMPTY>" -"<!ELEMENT device (channel | attribute | debug-attribute | buffer-attribute)*>" -"<!ELEMENT channel (scan-element?, attribute*)>" -"<!ELEMENT attribute EMPTY>" -"<!ELEMENT scan-element EMPTY>" -"<!ELEMENT debug-attribute EMPTY>" -"<!ELEMENT buffer-attribute EMPTY>" -"<!ATTLIST context name CDATA #REQUIRED description CDATA #IMPLIED>" -"<!ATTLIST context-attribute name CDATA #REQUIRED value CDATA #REQUIRED>" -"<!ATTLIST device id CDATA #REQUIRED name CDATA #IMPLIED>" -"<!ATTLIST channel id CDATA #REQUIRED type (input|output) #REQUIRED name CDATA #IMPLIED>" -"<!ATTLIST scan-element index CDATA #REQUIRED format CDATA #REQUIRED scale CDATA #IMPLIED>" -"<!ATTLIST attribute name CDATA #REQUIRED filename CDATA #IMPLIED>" -"<!ATTLIST debug-attribute name CDATA #REQUIRED>" -"<!ATTLIST buffer-attribute name CDATA #REQUIRED>" -"]>"; - -/* Returns a string containing the XML representation of this context */ -char * iio_context_create_xml(const struct iio_context *ctx) -{ - size_t len, *devices_len = NULL; - char *str, *ptr, **devices = NULL; - unsigned int i; - - len = strlen(ctx->name) + sizeof(xml_header) - 1 + - sizeof("<context name=\"\" ></context>"); - if (ctx->description) - len += strlen(ctx->description) + - sizeof(" description=\"\"") - 1; - - for (i = 0; i < ctx->nb_attrs; i++) - len += strlen(ctx->attrs[i]) + - strlen(ctx->values[i]) + - sizeof("<context-attribute name=\"\" value=\"\" />"); - - if (ctx->nb_devices) { - devices_len = malloc(ctx->nb_devices * sizeof(*devices_len)); - if (!devices_len) { - errno = ENOMEM; - return NULL; - } - - devices = calloc(ctx->nb_devices, sizeof(*devices)); - if (!devices) - goto err_free_devices_len; - - for (i = 0; i < ctx->nb_devices; i++) { - char *xml = iio_device_get_xml(ctx->devices[i], - &devices_len[i]); - if (!xml) - goto err_free_devices; - devices[i] = xml; - len += devices_len[i]; - } - } - - str = malloc(len); - if (!str) { - errno = ENOMEM; - goto err_free_devices; - } - - if (ctx->description) { - iio_snprintf(str, len, "%s<context name=\"%s\" " - "description=\"%s\" >", - xml_header, ctx->name, ctx->description); - } else { - iio_snprintf(str, len, "%s<context name=\"%s\" >", - xml_header, ctx->name); - } - - ptr = strrchr(str, '\0'); - - for (i = 0; i < ctx->nb_attrs; i++) - ptr += sprintf(ptr, "<context-attribute name=\"%s\" value=\"%s\" />", - ctx->attrs[i], ctx->values[i]); - - - for (i = 0; i < ctx->nb_devices; i++) { - strcpy(ptr, devices[i]); - ptr += devices_len[i]; - free(devices[i]); - } - - free(devices); - free(devices_len); - strcpy(ptr, "</context>"); - return str; - -err_free_devices: - for (i = 0; i < ctx->nb_devices; i++) - free(devices[i]); - free(devices); -err_free_devices_len: - free(devices_len); - return NULL; -} - -const char * iio_context_get_xml(const struct iio_context *ctx) -{ - return ctx->xml; -} - -const char * iio_context_get_name(const struct iio_context *ctx) -{ - return ctx->name; -} - -const char * iio_context_get_description(const struct iio_context *ctx) -{ - if (ctx->description) - return ctx->description; - else - return ""; -} - -void iio_context_destroy(struct iio_context *ctx) -{ - unsigned int i; - if (ctx->ops->shutdown) - ctx->ops->shutdown(ctx); - - for (i = 0; i < ctx->nb_attrs; i++) { - free(ctx->attrs[i]); - free(ctx->values[i]); - } - if (ctx->nb_attrs) { - free(ctx->attrs); - free(ctx->values); - } - for (i = 0; i < ctx->nb_devices; i++) - free_device(ctx->devices[i]); - if (ctx->nb_devices) - free(ctx->devices); - if (ctx->xml) - free(ctx->xml); - if (ctx->description) - free(ctx->description); - free(ctx); -} - -unsigned int iio_context_get_devices_count(const struct iio_context *ctx) -{ - return ctx->nb_devices; -} - -struct iio_device * iio_context_get_device(const struct iio_context *ctx, - unsigned int index) -{ - if (index >= ctx->nb_devices) - return NULL; - else - return ctx->devices[index]; -} - -struct iio_device * iio_context_find_device(const struct iio_context *ctx, - const char *name) -{ - unsigned int i; - for (i = 0; i < ctx->nb_devices; i++) { - struct iio_device *dev = ctx->devices[i]; - if (!strcmp(dev->id, name) || - (dev->name && !strcmp(dev->name, name))) - return dev; - } - return NULL; -} - -static void reorder_channels(struct iio_device *dev) -{ - bool found; - unsigned int i; - - /* Reorder channels by index */ - do { - found = false; - for (i = 1; i < dev->nb_channels; i++) { - struct iio_channel **channels = dev->channels; - long ch1 = channels[i - 1]->index; - long ch2 = channels[i]->index; - - if (ch1 == ch2 && ch1 >= 0) { - ch1 = channels[i - 1]->format.shift; - ch2 = channels[i]->format.shift; - } - - if (ch2 >= 0 && ((ch1 > ch2) || ch1 < 0)) { - struct iio_channel *bak = channels[i]; - channels[i] = channels[i - 1]; - channels[i - 1] = bak; - found = true; - } - } - } while (found); - - for (i = 0; i < dev->nb_channels; i++) - dev->channels[i]->number = i; -} - -int iio_context_init(struct iio_context *ctx) -{ - unsigned int i; - - for (i = 0; i < ctx->nb_devices; i++) - reorder_channels(ctx->devices[i]); - - if (!ctx->xml) { - ctx->xml = iio_context_create_xml(ctx); - if (!ctx->xml) - return -ENOMEM; - } - - return 0; -} - -int iio_context_get_version(const struct iio_context *ctx, - unsigned int *major, unsigned int *minor, char git_tag[8]) -{ - if (ctx->ops->get_version) - return ctx->ops->get_version(ctx, major, minor, git_tag); - - iio_library_get_version(major, minor, git_tag); - return 0; -} - -int iio_context_set_timeout(struct iio_context *ctx, unsigned int timeout) -{ - if (ctx->ops->set_timeout) - return ctx->ops->set_timeout(ctx, timeout); - else - return -ENOSYS; -} - -struct iio_context * iio_context_clone(const struct iio_context *ctx) -{ - if (ctx->ops->clone) { - return ctx->ops->clone(ctx); - } else { - errno = ENOSYS; - return NULL; - } -} - -struct iio_context * iio_create_context_from_uri(const char *uri) -{ -#ifdef WITH_LOCAL_BACKEND - if (strcmp(uri, "local:") == 0) /* No address part */ - return iio_create_local_context(); -#endif - -#ifdef WITH_XML_BACKEND - if (strncmp(uri, "xml:", sizeof("xml:") - 1) == 0) - return iio_create_xml_context(uri + sizeof("xml:") - 1); -#endif - -#ifdef WITH_NETWORK_BACKEND - if (strncmp(uri, "ip:", sizeof("ip:") - 1) == 0) - return iio_create_network_context(uri+3); -#endif - -#ifdef WITH_USB_BACKEND - if (strncmp(uri, "usb:", sizeof("usb:") - 1) == 0) - return usb_create_context_from_uri(uri); -#endif - -#ifdef WITH_SERIAL_BACKEND - if (strncmp(uri, "serial:", sizeof("serial:") - 1) == 0) - return serial_create_context_from_uri(uri); -#endif - - errno = ENOSYS; - return NULL; -} - -struct iio_context * iio_create_default_context(void) -{ - char *hostname = getenv("IIOD_REMOTE"); - - if (hostname) { - struct iio_context *ctx; - - ctx = iio_create_context_from_uri(hostname); - if (ctx) - return ctx; - -#ifdef WITH_NETWORK_BACKEND - /* If the environment variable is an empty string, we will - * discover the server using ZeroConf */ - if (strlen(hostname) == 0) - hostname = NULL; - - return iio_create_network_context(hostname); -#endif - } - - return iio_create_local_context(); -} - -struct iio_context * iio_create_local_context(void) -{ -#ifdef WITH_LOCAL_BACKEND - return local_create_context(); -#else - errno = ENOSYS; - return NULL; -#endif -} - -struct iio_context * iio_create_network_context(const char *hostname) -{ -#ifdef WITH_NETWORK_BACKEND - return network_create_context(hostname); -#else - errno = ENOSYS; - return NULL; -#endif -} - -struct iio_context * iio_create_xml_context_mem(const char *xml, size_t len) -{ -#ifdef WITH_XML_BACKEND - return xml_create_context_mem(xml, len); -#else - errno = ENOSYS; - return NULL; -#endif -} - -struct iio_context * iio_create_xml_context(const char *xml_file) -{ -#ifdef WITH_XML_BACKEND - return xml_create_context(xml_file); -#else - errno = ENOSYS; - return NULL; -#endif -} - -unsigned int iio_context_get_attrs_count(const struct iio_context *ctx) -{ - return ctx->nb_attrs; -} - -int iio_context_get_attr(const struct iio_context *ctx, unsigned int index, - const char **name, const char **value) -{ - if (index >= ctx->nb_attrs) - return -EINVAL; - - if (name) - *name = ctx->attrs[index]; - if (value) - *value = ctx->values[index]; - return 0; -} - -const char * iio_context_get_attr_value( - const struct iio_context *ctx, const char *name) -{ - unsigned int i; - - for (i = 0; i < ctx->nb_attrs; i++) { - if (!strcmp(name, ctx->attrs[i])) - return ctx->values[i]; - } - - return NULL; -} - -int iio_context_add_attr(struct iio_context *ctx, - const char *key, const char *value) -{ - char **attrs, **values, *new_key, *new_val; - - attrs = realloc(ctx->attrs, - (ctx->nb_attrs + 1) * sizeof(*ctx->attrs)); - if (!attrs) - return -ENOMEM; - - ctx->attrs = attrs; - - values = realloc(ctx->values, - (ctx->nb_attrs + 1) * sizeof(*ctx->values)); - if (!values) - return -ENOMEM; - - ctx->values = values; - - new_key = iio_strdup(key); - if (!new_key) - return -ENOMEM; - - new_val = iio_strdup(value); - if (!new_val) { - free(new_key); - return -ENOMEM; - } - - ctx->attrs[ctx->nb_attrs] = new_key; - ctx->values[ctx->nb_attrs] = new_val; - ctx->nb_attrs++; - return 0; -} |