Azure IoT common library
Fork of azure_c_shared_utility by
constbuffer.c@0:fa2de1b79154, 2016-04-08 (annotated)
- Committer:
- Azure.IoT Build
- Date:
- Fri Apr 08 12:01:36 2016 -0700
- Revision:
- 0:fa2de1b79154
- Child:
- 6:c55b013dfc2a
1.0.4
Who changed what in which revision?
User | Revision | Line number | New 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> |
Azure.IoT Build | 0:fa2de1b79154 | 8 | #ifdef _CRTDBG_MAP_ALLOC |
Azure.IoT Build | 0:fa2de1b79154 | 9 | #include <crtdbg.h> |
Azure.IoT Build | 0:fa2de1b79154 | 10 | #endif |
Azure.IoT Build | 0:fa2de1b79154 | 11 | #include "azure_c_shared_utility/gballoc.h" |
Azure.IoT Build | 0:fa2de1b79154 | 12 | |
Azure.IoT Build | 0:fa2de1b79154 | 13 | #include "azure_c_shared_utility/constbuffer.h" |
Azure.IoT Build | 0:fa2de1b79154 | 14 | #include "azure_c_shared_utility/iot_logging.h" |
Azure.IoT Build | 0:fa2de1b79154 | 15 | #include "azure_c_shared_utility/refcount.h" |
Azure.IoT Build | 0:fa2de1b79154 | 16 | |
Azure.IoT Build | 0:fa2de1b79154 | 17 | typedef struct CONSTBUFFER_HANDLE_DATA_TAG |
Azure.IoT Build | 0:fa2de1b79154 | 18 | { |
Azure.IoT Build | 0:fa2de1b79154 | 19 | CONSTBUFFER alias; |
Azure.IoT Build | 0:fa2de1b79154 | 20 | }CONSTBUFFER_HANDLE_DATA; |
Azure.IoT Build | 0:fa2de1b79154 | 21 | |
Azure.IoT Build | 0:fa2de1b79154 | 22 | DEFINE_REFCOUNT_TYPE(CONSTBUFFER_HANDLE_DATA); |
Azure.IoT Build | 0:fa2de1b79154 | 23 | |
Azure.IoT Build | 0:fa2de1b79154 | 24 | static CONSTBUFFER_HANDLE CONSTBUFFER_Create_Internal(const unsigned char* source, size_t size) |
Azure.IoT Build | 0:fa2de1b79154 | 25 | { |
Azure.IoT Build | 0:fa2de1b79154 | 26 | CONSTBUFFER_HANDLE_DATA* result; |
Azure.IoT Build | 0:fa2de1b79154 | 27 | /*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 | 28 | /*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 | 29 | result = REFCOUNT_TYPE_CREATE(CONSTBUFFER_HANDLE_DATA); |
Azure.IoT Build | 0:fa2de1b79154 | 30 | if (result == NULL) |
Azure.IoT Build | 0:fa2de1b79154 | 31 | { |
Azure.IoT Build | 0:fa2de1b79154 | 32 | /*Codes_SRS_CONSTBUFFER_02_003: [If creating the copy fails then CONSTBUFFER_Create shall return NULL.]*/ |
Azure.IoT Build | 0:fa2de1b79154 | 33 | /*Codes_SRS_CONSTBUFFER_02_008: [If copying the content fails, then CONSTBUFFER_CreateFromBuffer shall fail and return NULL.] */ |
Azure.IoT Build | 0:fa2de1b79154 | 34 | LogError("unable to malloc"); |
Azure.IoT Build | 0:fa2de1b79154 | 35 | /*return as is*/ |
Azure.IoT Build | 0:fa2de1b79154 | 36 | } |
Azure.IoT Build | 0:fa2de1b79154 | 37 | else |
Azure.IoT Build | 0:fa2de1b79154 | 38 | { |
Azure.IoT Build | 0:fa2de1b79154 | 39 | /*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 | 40 | result->alias.size = size; |
Azure.IoT Build | 0:fa2de1b79154 | 41 | if (size == 0) |
Azure.IoT Build | 0:fa2de1b79154 | 42 | { |
Azure.IoT Build | 0:fa2de1b79154 | 43 | result->alias.buffer = NULL; |
Azure.IoT Build | 0:fa2de1b79154 | 44 | } |
Azure.IoT Build | 0:fa2de1b79154 | 45 | else |
Azure.IoT Build | 0:fa2de1b79154 | 46 | { |
Azure.IoT Build | 0:fa2de1b79154 | 47 | unsigned char* temp = (unsigned char*)malloc(size); |
Azure.IoT Build | 0:fa2de1b79154 | 48 | if (temp == NULL) |
Azure.IoT Build | 0:fa2de1b79154 | 49 | { |
Azure.IoT Build | 0:fa2de1b79154 | 50 | /*Codes_SRS_CONSTBUFFER_02_003: [If creating the copy fails then CONSTBUFFER_Create shall return NULL.]*/ |
Azure.IoT Build | 0:fa2de1b79154 | 51 | /*Codes_SRS_CONSTBUFFER_02_008: [If copying the content fails, then CONSTBUFFER_CreateFromBuffer shall fail and return NULL.] */ |
Azure.IoT Build | 0:fa2de1b79154 | 52 | LogError("unable to malloc"); |
Azure.IoT Build | 0:fa2de1b79154 | 53 | free(result); |
Azure.IoT Build | 0:fa2de1b79154 | 54 | result = NULL; |
Azure.IoT Build | 0:fa2de1b79154 | 55 | } |
Azure.IoT Build | 0:fa2de1b79154 | 56 | else |
Azure.IoT Build | 0:fa2de1b79154 | 57 | { |
Azure.IoT Build | 0:fa2de1b79154 | 58 | |
Azure.IoT Build | 0:fa2de1b79154 | 59 | /*Codes_SRS_CONSTBUFFER_02_004: [Otherwise CONSTBUFFER_Create shall return a non-NULL handle.]*/ |
Azure.IoT Build | 0:fa2de1b79154 | 60 | /*Codes_SRS_CONSTBUFFER_02_007: [Otherwise, CONSTBUFFER_CreateFromBuffer shall copy the content of buffer.]*/ |
Azure.IoT Build | 0:fa2de1b79154 | 61 | /*Codes_SRS_CONSTBUFFER_02_009: [Otherwise, CONSTBUFFER_CreateFromBuffer shall return a non-NULL handle.]*/ |
Azure.IoT Build | 0:fa2de1b79154 | 62 | memcpy(temp, source, size); |
Azure.IoT Build | 0:fa2de1b79154 | 63 | result->alias.buffer = temp; |
Azure.IoT Build | 0:fa2de1b79154 | 64 | } |
Azure.IoT Build | 0:fa2de1b79154 | 65 | } |
Azure.IoT Build | 0:fa2de1b79154 | 66 | } |
Azure.IoT Build | 0:fa2de1b79154 | 67 | return (CONSTBUFFER_HANDLE)result; |
Azure.IoT Build | 0:fa2de1b79154 | 68 | } |
Azure.IoT Build | 0:fa2de1b79154 | 69 | |
Azure.IoT Build | 0:fa2de1b79154 | 70 | CONSTBUFFER_HANDLE CONSTBUFFER_Create(const unsigned char* source, size_t size) |
Azure.IoT Build | 0:fa2de1b79154 | 71 | { |
Azure.IoT Build | 0:fa2de1b79154 | 72 | CONSTBUFFER_HANDLE_DATA* result; |
Azure.IoT Build | 0:fa2de1b79154 | 73 | /*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 | 74 | if ( |
Azure.IoT Build | 0:fa2de1b79154 | 75 | (source == NULL) && |
Azure.IoT Build | 0:fa2de1b79154 | 76 | (size != 0) |
Azure.IoT Build | 0:fa2de1b79154 | 77 | ) |
Azure.IoT Build | 0:fa2de1b79154 | 78 | { |
Azure.IoT Build | 0:fa2de1b79154 | 79 | LogError("invalid arguments passes to CONSTBUFFER_Create"); |
Azure.IoT Build | 0:fa2de1b79154 | 80 | result = NULL; |
Azure.IoT Build | 0:fa2de1b79154 | 81 | } |
Azure.IoT Build | 0:fa2de1b79154 | 82 | else |
Azure.IoT Build | 0:fa2de1b79154 | 83 | { |
Azure.IoT Build | 0:fa2de1b79154 | 84 | result = (CONSTBUFFER_HANDLE_DATA*)CONSTBUFFER_Create_Internal(source, size); |
Azure.IoT Build | 0:fa2de1b79154 | 85 | } |
Azure.IoT Build | 0:fa2de1b79154 | 86 | return (CONSTBUFFER_HANDLE)result; |
Azure.IoT Build | 0:fa2de1b79154 | 87 | } |
Azure.IoT Build | 0:fa2de1b79154 | 88 | |
Azure.IoT Build | 0:fa2de1b79154 | 89 | /*this creates a new constbuffer from an existing BUFFER_HANDLE*/ |
Azure.IoT Build | 0:fa2de1b79154 | 90 | CONSTBUFFER_HANDLE CONSTBUFFER_CreateFromBuffer(BUFFER_HANDLE buffer) |
Azure.IoT Build | 0:fa2de1b79154 | 91 | { |
Azure.IoT Build | 0:fa2de1b79154 | 92 | CONSTBUFFER_HANDLE_DATA* result; |
Azure.IoT Build | 0:fa2de1b79154 | 93 | /*Codes_SRS_CONSTBUFFER_02_006: [If buffer is NULL then CONSTBUFFER_CreateFromBuffer shall fail and return NULL.]*/ |
Azure.IoT Build | 0:fa2de1b79154 | 94 | if (buffer == NULL) |
Azure.IoT Build | 0:fa2de1b79154 | 95 | { |
Azure.IoT Build | 0:fa2de1b79154 | 96 | LogError("invalid arg passed to CONSTBUFFER_CreateFromBuffer"); |
Azure.IoT Build | 0:fa2de1b79154 | 97 | result = NULL; |
Azure.IoT Build | 0:fa2de1b79154 | 98 | } |
Azure.IoT Build | 0:fa2de1b79154 | 99 | else |
Azure.IoT Build | 0:fa2de1b79154 | 100 | { |
Azure.IoT Build | 0:fa2de1b79154 | 101 | result = (CONSTBUFFER_HANDLE_DATA*)CONSTBUFFER_Create_Internal(BUFFER_u_char(buffer), BUFFER_length(buffer)); |
Azure.IoT Build | 0:fa2de1b79154 | 102 | } |
Azure.IoT Build | 0:fa2de1b79154 | 103 | return (CONSTBUFFER_HANDLE)result; |
Azure.IoT Build | 0:fa2de1b79154 | 104 | } |
Azure.IoT Build | 0:fa2de1b79154 | 105 | |
Azure.IoT Build | 0:fa2de1b79154 | 106 | CONSTBUFFER_HANDLE CONSTBUFFER_Clone(CONSTBUFFER_HANDLE constbufferHandle) |
Azure.IoT Build | 0:fa2de1b79154 | 107 | { |
Azure.IoT Build | 0:fa2de1b79154 | 108 | if (constbufferHandle == NULL) |
Azure.IoT Build | 0:fa2de1b79154 | 109 | { |
Azure.IoT Build | 0:fa2de1b79154 | 110 | /*Codes_SRS_CONSTBUFFER_02_013: [If constbufferHandle is NULL then CONSTBUFFER_Clone shall fail and return NULL.]*/ |
Azure.IoT Build | 0:fa2de1b79154 | 111 | LogError("invalid arg"); |
Azure.IoT Build | 0:fa2de1b79154 | 112 | } |
Azure.IoT Build | 0:fa2de1b79154 | 113 | else |
Azure.IoT Build | 0:fa2de1b79154 | 114 | { |
Azure.IoT Build | 0:fa2de1b79154 | 115 | /*Codes_SRS_CONSTBUFFER_02_014: [Otherwise, CONSTBUFFER_Clone shall increment the reference count and return constbufferHandle.]*/ |
Azure.IoT Build | 0:fa2de1b79154 | 116 | INC_REF(CONSTBUFFER_HANDLE_DATA, constbufferHandle); |
Azure.IoT Build | 0:fa2de1b79154 | 117 | } |
Azure.IoT Build | 0:fa2de1b79154 | 118 | return constbufferHandle; |
Azure.IoT Build | 0:fa2de1b79154 | 119 | } |
Azure.IoT Build | 0:fa2de1b79154 | 120 | |
Azure.IoT Build | 0:fa2de1b79154 | 121 | const CONSTBUFFER* CONSTBUFFER_GetContent(CONSTBUFFER_HANDLE constbufferHandle) |
Azure.IoT Build | 0:fa2de1b79154 | 122 | { |
Azure.IoT Build | 0:fa2de1b79154 | 123 | const CONSTBUFFER* result; |
Azure.IoT Build | 0:fa2de1b79154 | 124 | if (constbufferHandle == NULL) |
Azure.IoT Build | 0:fa2de1b79154 | 125 | { |
Azure.IoT Build | 0:fa2de1b79154 | 126 | /*Codes_SRS_CONSTBUFFER_02_011: [If constbufferHandle is NULL then CONSTBUFFER_GetContent shall return NULL.]*/ |
Azure.IoT Build | 0:fa2de1b79154 | 127 | result = NULL; |
Azure.IoT Build | 0:fa2de1b79154 | 128 | LogError("invalid arg"); |
Azure.IoT Build | 0:fa2de1b79154 | 129 | } |
Azure.IoT Build | 0:fa2de1b79154 | 130 | else |
Azure.IoT Build | 0:fa2de1b79154 | 131 | { |
Azure.IoT Build | 0:fa2de1b79154 | 132 | /*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 | 133 | result = &(((CONSTBUFFER_HANDLE_DATA*)constbufferHandle)->alias); |
Azure.IoT Build | 0:fa2de1b79154 | 134 | } |
Azure.IoT Build | 0:fa2de1b79154 | 135 | return result; |
Azure.IoT Build | 0:fa2de1b79154 | 136 | } |
Azure.IoT Build | 0:fa2de1b79154 | 137 | |
Azure.IoT Build | 0:fa2de1b79154 | 138 | void CONSTBUFFER_Destroy(CONSTBUFFER_HANDLE constbufferHandle) |
Azure.IoT Build | 0:fa2de1b79154 | 139 | { |
Azure.IoT Build | 0:fa2de1b79154 | 140 | /*Codes_SRS_CONSTBUFFER_02_015: [If constbufferHandle is NULL then CONSTBUFFER_Destroy shall do nothing.]*/ |
Azure.IoT Build | 0:fa2de1b79154 | 141 | if (constbufferHandle != NULL) |
Azure.IoT Build | 0:fa2de1b79154 | 142 | { |
Azure.IoT Build | 0:fa2de1b79154 | 143 | /*Codes_SRS_CONSTBUFFER_02_016: [Otherwise, CONSTBUFFER_Destroy shall decrement the refcount on the constbufferHandle handle.]*/ |
Azure.IoT Build | 0:fa2de1b79154 | 144 | if (DEC_REF(CONSTBUFFER_HANDLE_DATA, constbufferHandle) == DEC_RETURN_ZERO) |
Azure.IoT Build | 0:fa2de1b79154 | 145 | { |
Azure.IoT Build | 0:fa2de1b79154 | 146 | /*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 | 147 | CONSTBUFFER_HANDLE_DATA* constbufferHandleData = (CONSTBUFFER_HANDLE_DATA*)constbufferHandle; |
Azure.IoT Build | 0:fa2de1b79154 | 148 | free((void*)constbufferHandleData->alias.buffer); |
Azure.IoT Build | 0:fa2de1b79154 | 149 | free(constbufferHandleData); |
Azure.IoT Build | 0:fa2de1b79154 | 150 | } |
Azure.IoT Build | 0:fa2de1b79154 | 151 | } |
Azure.IoT Build | 0:fa2de1b79154 | 152 | } |