Azure IoT / azure_c_shared_utility

Azure IoT common library

Dependents:   STM32F746_iothub_client_sample_mqtt f767zi_mqtt iothub_client_sample_amqp iothub_client_sample_http ... more

constbuffer.c@19:2e0811512ceb, 2017-01-28 (annotated)

Committer:
AzureIoTClient
Date:
Sat Jan 28 09:35:22 2017 -0800
Revision:
19:2e0811512ceb
Parent:
11:77df6d7e65ae
Child:
48:81866008bba4
1.1.6

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Azure.IoT Build 0:fa2de1b79154 1 // Copyright (c) Microsoft. All rights reserved.
Azure.IoT Build 0:fa2de1b79154 2 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
Azure.IoT Build 0:fa2de1b79154 3
Azure.IoT Build 0:fa2de1b79154 4 //
Azure.IoT Build 0:fa2de1b79154 5 // PUT NO INCLUDES BEFORE HERE
Azure.IoT Build 0:fa2de1b79154 6 //
Azure.IoT Build 0:fa2de1b79154 7 #include <stdlib.h>
AzureIoTClient 19:2e0811512ceb 8 #include <stddef.h>
Azure.IoT Build 0:fa2de1b79154 9 #include "azure_c_shared_utility/gballoc.h"
Azure.IoT Build 0:fa2de1b79154 10 #include "azure_c_shared_utility/constbuffer.h"
Azure.IoT Build 6:c55b013dfc2a 11 #include "azure_c_shared_utility/xlogging.h"
Azure.IoT Build 0:fa2de1b79154 12 #include "azure_c_shared_utility/refcount.h"
Azure.IoT Build 0:fa2de1b79154 13
Azure.IoT Build 0:fa2de1b79154 14 typedef struct CONSTBUFFER_HANDLE_DATA_TAG
Azure.IoT Build 0:fa2de1b79154 15 {
Azure.IoT Build 0:fa2de1b79154 16 CONSTBUFFER alias;
Azure.IoT Build 0:fa2de1b79154 17 }CONSTBUFFER_HANDLE_DATA;
Azure.IoT Build 0:fa2de1b79154 18
Azure.IoT Build 0:fa2de1b79154 19 DEFINE_REFCOUNT_TYPE(CONSTBUFFER_HANDLE_DATA);
Azure.IoT Build 0:fa2de1b79154 20
Azure.IoT Build 0:fa2de1b79154 21 static CONSTBUFFER_HANDLE CONSTBUFFER_Create_Internal(const unsigned char* source, size_t size)
Azure.IoT Build 0:fa2de1b79154 22 {
Azure.IoT Build 0:fa2de1b79154 23 CONSTBUFFER_HANDLE_DATA* result;
Azure.IoT Build 0:fa2de1b79154 24 /*Codes_SRS_CONSTBUFFER_02_005: [The non-NULL handle returned by CONSTBUFFER_Create shall have its ref count set to "1".]*/
Azure.IoT Build 0:fa2de1b79154 25 /*Codes_SRS_CONSTBUFFER_02_010: [The non-NULL handle returned by CONSTBUFFER_CreateFromBuffer shall have its ref count set to "1".]*/
Azure.IoT Build 0:fa2de1b79154 26 result = REFCOUNT_TYPE_CREATE(CONSTBUFFER_HANDLE_DATA);
Azure.IoT Build 0:fa2de1b79154 27 if (result == NULL)
Azure.IoT Build 0:fa2de1b79154 28 {
Azure.IoT Build 0:fa2de1b79154 29 /*Codes_SRS_CONSTBUFFER_02_003: [If creating the copy fails then CONSTBUFFER_Create shall return NULL.]*/
Azure.IoT Build 0:fa2de1b79154 30 /*Codes_SRS_CONSTBUFFER_02_008: [If copying the content fails, then CONSTBUFFER_CreateFromBuffer shall fail and return NULL.] */
Azure.IoT Build 0:fa2de1b79154 31 LogError("unable to malloc");
Azure.IoT Build 0:fa2de1b79154 32 /*return as is*/
Azure.IoT Build 0:fa2de1b79154 33 }
Azure.IoT Build 0:fa2de1b79154 34 else
Azure.IoT Build 0:fa2de1b79154 35 {
Azure.IoT Build 0:fa2de1b79154 36 /*Codes_SRS_CONSTBUFFER_02_002: [Otherwise, CONSTBUFFER_Create shall create a copy of the memory area pointed to by source having size bytes.]*/
Azure.IoT Build 0:fa2de1b79154 37 result->alias.size = size;
Azure.IoT Build 0:fa2de1b79154 38 if (size == 0)
Azure.IoT Build 0:fa2de1b79154 39 {
Azure.IoT Build 0:fa2de1b79154 40 result->alias.buffer = NULL;
Azure.IoT Build 0:fa2de1b79154 41 }
Azure.IoT Build 0:fa2de1b79154 42 else
Azure.IoT Build 0:fa2de1b79154 43 {
Azure.IoT Build 0:fa2de1b79154 44 unsigned char* temp = (unsigned char*)malloc(size);
Azure.IoT Build 0:fa2de1b79154 45 if (temp == NULL)
Azure.IoT Build 0:fa2de1b79154 46 {
Azure.IoT Build 0:fa2de1b79154 47 /*Codes_SRS_CONSTBUFFER_02_003: [If creating the copy fails then CONSTBUFFER_Create shall return NULL.]*/
Azure.IoT Build 0:fa2de1b79154 48 /*Codes_SRS_CONSTBUFFER_02_008: [If copying the content fails, then CONSTBUFFER_CreateFromBuffer shall fail and return NULL.] */
Azure.IoT Build 0:fa2de1b79154 49 LogError("unable to malloc");
Azure.IoT Build 0:fa2de1b79154 50 free(result);
Azure.IoT Build 0:fa2de1b79154 51 result = NULL;
Azure.IoT Build 0:fa2de1b79154 52 }
Azure.IoT Build 0:fa2de1b79154 53 else
Azure.IoT Build 0:fa2de1b79154 54 {
Azure.IoT Build 0:fa2de1b79154 55
Azure.IoT Build 0:fa2de1b79154 56 /*Codes_SRS_CONSTBUFFER_02_004: [Otherwise CONSTBUFFER_Create shall return a non-NULL handle.]*/
Azure.IoT Build 0:fa2de1b79154 57 /*Codes_SRS_CONSTBUFFER_02_007: [Otherwise, CONSTBUFFER_CreateFromBuffer shall copy the content of buffer.]*/
Azure.IoT Build 0:fa2de1b79154 58 /*Codes_SRS_CONSTBUFFER_02_009: [Otherwise, CONSTBUFFER_CreateFromBuffer shall return a non-NULL handle.]*/
AzureIoTClient 19:2e0811512ceb 59 (void)memcpy(temp, source, size);
Azure.IoT Build 0:fa2de1b79154 60 result->alias.buffer = temp;
Azure.IoT Build 0:fa2de1b79154 61 }
Azure.IoT Build 0:fa2de1b79154 62 }
Azure.IoT Build 0:fa2de1b79154 63 }
Azure.IoT Build 0:fa2de1b79154 64 return (CONSTBUFFER_HANDLE)result;
Azure.IoT Build 0:fa2de1b79154 65 }
Azure.IoT Build 0:fa2de1b79154 66
Azure.IoT Build 0:fa2de1b79154 67 CONSTBUFFER_HANDLE CONSTBUFFER_Create(const unsigned char* source, size_t size)
Azure.IoT Build 0:fa2de1b79154 68 {
Azure.IoT Build 0:fa2de1b79154 69 CONSTBUFFER_HANDLE_DATA* result;
Azure.IoT Build 0:fa2de1b79154 70 /*Codes_SRS_CONSTBUFFER_02_001: [If source is NULL and size is different than 0 then CONSTBUFFER_Create shall fail and return NULL.]*/
Azure.IoT Build 0:fa2de1b79154 71 if (
Azure.IoT Build 0:fa2de1b79154 72 (source == NULL) &&
Azure.IoT Build 0:fa2de1b79154 73 (size != 0)
Azure.IoT Build 0:fa2de1b79154 74 )
Azure.IoT Build 0:fa2de1b79154 75 {
Azure.IoT Build 0:fa2de1b79154 76 LogError("invalid arguments passes to CONSTBUFFER_Create");
Azure.IoT Build 0:fa2de1b79154 77 result = NULL;
Azure.IoT Build 0:fa2de1b79154 78 }
Azure.IoT Build 0:fa2de1b79154 79 else
Azure.IoT Build 0:fa2de1b79154 80 {
Azure.IoT Build 0:fa2de1b79154 81 result = (CONSTBUFFER_HANDLE_DATA*)CONSTBUFFER_Create_Internal(source, size);
Azure.IoT Build 0:fa2de1b79154 82 }
Azure.IoT Build 0:fa2de1b79154 83 return (CONSTBUFFER_HANDLE)result;
Azure.IoT Build 0:fa2de1b79154 84 }
Azure.IoT Build 0:fa2de1b79154 85
Azure.IoT Build 0:fa2de1b79154 86 /*this creates a new constbuffer from an existing BUFFER_HANDLE*/
Azure.IoT Build 0:fa2de1b79154 87 CONSTBUFFER_HANDLE CONSTBUFFER_CreateFromBuffer(BUFFER_HANDLE buffer)
Azure.IoT Build 0:fa2de1b79154 88 {
Azure.IoT Build 0:fa2de1b79154 89 CONSTBUFFER_HANDLE_DATA* result;
Azure.IoT Build 0:fa2de1b79154 90 /*Codes_SRS_CONSTBUFFER_02_006: [If buffer is NULL then CONSTBUFFER_CreateFromBuffer shall fail and return NULL.]*/
Azure.IoT Build 0:fa2de1b79154 91 if (buffer == NULL)
Azure.IoT Build 0:fa2de1b79154 92 {
Azure.IoT Build 0:fa2de1b79154 93 LogError("invalid arg passed to CONSTBUFFER_CreateFromBuffer");
Azure.IoT Build 0:fa2de1b79154 94 result = NULL;
Azure.IoT Build 0:fa2de1b79154 95 }
Azure.IoT Build 0:fa2de1b79154 96 else
Azure.IoT Build 0:fa2de1b79154 97 {
AzureIoTClient 11:77df6d7e65ae 98 size_t length = BUFFER_length(buffer);
AzureIoTClient 11:77df6d7e65ae 99 unsigned char* rawBuffer = BUFFER_u_char(buffer);
AzureIoTClient 11:77df6d7e65ae 100 result = (CONSTBUFFER_HANDLE_DATA*)CONSTBUFFER_Create_Internal(rawBuffer, length);
Azure.IoT Build 0:fa2de1b79154 101 }
Azure.IoT Build 0:fa2de1b79154 102 return (CONSTBUFFER_HANDLE)result;
Azure.IoT Build 0:fa2de1b79154 103 }
Azure.IoT Build 0:fa2de1b79154 104
Azure.IoT Build 0:fa2de1b79154 105 CONSTBUFFER_HANDLE CONSTBUFFER_Clone(CONSTBUFFER_HANDLE constbufferHandle)
Azure.IoT Build 0:fa2de1b79154 106 {
Azure.IoT Build 0:fa2de1b79154 107 if (constbufferHandle == NULL)
Azure.IoT Build 0:fa2de1b79154 108 {
Azure.IoT Build 0:fa2de1b79154 109 /*Codes_SRS_CONSTBUFFER_02_013: [If constbufferHandle is NULL then CONSTBUFFER_Clone shall fail and return NULL.]*/
Azure.IoT Build 0:fa2de1b79154 110 LogError("invalid arg");
Azure.IoT Build 0:fa2de1b79154 111 }
Azure.IoT Build 0:fa2de1b79154 112 else
Azure.IoT Build 0:fa2de1b79154 113 {
Azure.IoT Build 0:fa2de1b79154 114 /*Codes_SRS_CONSTBUFFER_02_014: [Otherwise, CONSTBUFFER_Clone shall increment the reference count and return constbufferHandle.]*/
Azure.IoT Build 0:fa2de1b79154 115 INC_REF(CONSTBUFFER_HANDLE_DATA, constbufferHandle);
Azure.IoT Build 0:fa2de1b79154 116 }
Azure.IoT Build 0:fa2de1b79154 117 return constbufferHandle;
Azure.IoT Build 0:fa2de1b79154 118 }
Azure.IoT Build 0:fa2de1b79154 119
Azure.IoT Build 0:fa2de1b79154 120 const CONSTBUFFER* CONSTBUFFER_GetContent(CONSTBUFFER_HANDLE constbufferHandle)
Azure.IoT Build 0:fa2de1b79154 121 {
Azure.IoT Build 0:fa2de1b79154 122 const CONSTBUFFER* result;
Azure.IoT Build 0:fa2de1b79154 123 if (constbufferHandle == NULL)
Azure.IoT Build 0:fa2de1b79154 124 {
Azure.IoT Build 0:fa2de1b79154 125 /*Codes_SRS_CONSTBUFFER_02_011: [If constbufferHandle is NULL then CONSTBUFFER_GetContent shall return NULL.]*/
Azure.IoT Build 0:fa2de1b79154 126 result = NULL;
Azure.IoT Build 0:fa2de1b79154 127 LogError("invalid arg");
Azure.IoT Build 0:fa2de1b79154 128 }
Azure.IoT Build 0:fa2de1b79154 129 else
Azure.IoT Build 0:fa2de1b79154 130 {
Azure.IoT Build 0:fa2de1b79154 131 /*Codes_SRS_CONSTBUFFER_02_012: [Otherwise, CONSTBUFFER_GetContent shall return a const CONSTBUFFER* that matches byte by byte the original bytes used to created the const buffer and has the same length.]*/
Azure.IoT Build 0:fa2de1b79154 132 result = &(((CONSTBUFFER_HANDLE_DATA*)constbufferHandle)->alias);
Azure.IoT Build 0:fa2de1b79154 133 }
Azure.IoT Build 0:fa2de1b79154 134 return result;
Azure.IoT Build 0:fa2de1b79154 135 }
Azure.IoT Build 0:fa2de1b79154 136
Azure.IoT Build 0:fa2de1b79154 137 void CONSTBUFFER_Destroy(CONSTBUFFER_HANDLE constbufferHandle)
Azure.IoT Build 0:fa2de1b79154 138 {
Azure.IoT Build 0:fa2de1b79154 139 /*Codes_SRS_CONSTBUFFER_02_015: [If constbufferHandle is NULL then CONSTBUFFER_Destroy shall do nothing.]*/
Azure.IoT Build 0:fa2de1b79154 140 if (constbufferHandle != NULL)
Azure.IoT Build 0:fa2de1b79154 141 {
Azure.IoT Build 0:fa2de1b79154 142 /*Codes_SRS_CONSTBUFFER_02_016: [Otherwise, CONSTBUFFER_Destroy shall decrement the refcount on the constbufferHandle handle.]*/
Azure.IoT Build 0:fa2de1b79154 143 if (DEC_REF(CONSTBUFFER_HANDLE_DATA, constbufferHandle) == DEC_RETURN_ZERO)
Azure.IoT Build 0:fa2de1b79154 144 {
Azure.IoT Build 0:fa2de1b79154 145 /*Codes_SRS_CONSTBUFFER_02_017: [If the refcount reaches zero, then CONSTBUFFER_Destroy shall deallocate all resources used by the CONSTBUFFER_HANDLE.]*/
Azure.IoT Build 0:fa2de1b79154 146 CONSTBUFFER_HANDLE_DATA* constbufferHandleData = (CONSTBUFFER_HANDLE_DATA*)constbufferHandle;
Azure.IoT Build 0:fa2de1b79154 147 free((void*)constbufferHandleData->alias.buffer);
Azure.IoT Build 0:fa2de1b79154 148 free(constbufferHandleData);
Azure.IoT Build 0:fa2de1b79154 149 }
Azure.IoT Build 0:fa2de1b79154 150 }
Azure.IoT Build 0:fa2de1b79154 151 }