[457] | 1 | // Copyright (c) Microsoft. All rights reserved.
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| 2 | // Licensed under the MIT license. See LICENSE file in the project root for full license information.
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| 3 |
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| 4 | #include <stdlib.h>
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| 5 | #include <string.h>
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| 6 | #include <stdbool.h>
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| 7 | #include "azure_c_shared_utility/gballoc.h"
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| 8 | #include "azure_c_shared_utility/buffer_.h"
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| 9 | #include "azure_c_shared_utility/optimize_size.h"
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| 10 | #include "azure_c_shared_utility/xlogging.h"
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| 11 |
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| 12 | typedef struct BUFFER_TAG
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| 13 | {
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| 14 | unsigned char* buffer;
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| 15 | size_t size;
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| 16 | } BUFFER;
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| 17 |
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| 18 | /* Codes_SRS_BUFFER_07_001: [BUFFER_new shall allocate a BUFFER_HANDLE that will contain a NULL unsigned char*.] */
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| 19 | BUFFER_HANDLE BUFFER_new(void)
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| 20 | {
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| 21 | BUFFER* temp = (BUFFER*)calloc(1, sizeof(BUFFER));
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| 22 | /* Codes_SRS_BUFFER_07_002: [BUFFER_new shall return NULL on any error that occurs.] */
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| 23 | if (temp != NULL)
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| 24 | {
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| 25 | temp->buffer = NULL;
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| 26 | temp->size = 0;
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| 27 | }
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| 28 | return (BUFFER_HANDLE)temp;
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| 29 | }
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| 30 |
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| 31 | static int BUFFER_safemalloc(BUFFER* handleptr, size_t size)
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| 32 | {
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| 33 | int result;
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| 34 | size_t sizetomalloc = size;
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| 35 | if (size == 0)
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| 36 | {
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| 37 | sizetomalloc = 1;
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| 38 | }
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| 39 | handleptr->buffer = (unsigned char*)malloc(sizetomalloc);
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| 40 | if (handleptr->buffer == NULL)
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| 41 | {
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| 42 | /*Codes_SRS_BUFFER_02_003: [If allocating memory fails, then BUFFER_create shall return NULL.]*/
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| 43 | LogError("Failure allocating data");
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| 44 | result = MU_FAILURE;
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| 45 | }
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| 46 | else
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| 47 | {
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| 48 | // we still consider the real buffer size is 0
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| 49 | handleptr->size = size;
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| 50 | result = 0;
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| 51 | }
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| 52 | return result;
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| 53 | }
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| 54 |
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| 55 | BUFFER_HANDLE BUFFER_create(const unsigned char* source, size_t size)
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| 56 | {
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| 57 | BUFFER* result;
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| 58 | /*Codes_SRS_BUFFER_02_001: [If source is NULL then BUFFER_create shall return NULL.]*/
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| 59 | if (source == NULL)
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| 60 | {
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| 61 | LogError("invalid parameter source: %p", source);
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| 62 | result = NULL;
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| 63 | }
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| 64 | else
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| 65 | {
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| 66 | /*Codes_SRS_BUFFER_02_002: [Otherwise, BUFFER_create shall allocate memory to hold size bytes and shall copy from source size bytes into the newly allocated memory.] */
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| 67 | result = (BUFFER*)calloc(1, sizeof(BUFFER));
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| 68 | if (result == NULL)
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| 69 | {
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| 70 | /*Codes_SRS_BUFFER_02_003: [If allocating memory fails, then BUFFER_create shall return NULL.] */
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| 71 | /*fallthrough*/
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| 72 | LogError("Failure allocating BUFFER structure");
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| 73 | }
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| 74 | else
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| 75 | {
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| 76 | /* Codes_SRS_BUFFER_02_005: [If size parameter is 0 then 1 byte of memory shall be allocated yet size of the buffer shall be set to 0.]*/
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| 77 | if (BUFFER_safemalloc(result, size) != 0)
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| 78 | {
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| 79 | LogError("unable to BUFFER_safemalloc ");
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| 80 | free(result);
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| 81 | result = NULL;
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| 82 | }
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| 83 | else
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| 84 | {
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| 85 | /*Codes_SRS_BUFFER_02_004: [Otherwise, BUFFER_create shall return a non-NULL handle.] */
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| 86 | (void)memcpy(result->buffer, source, size);
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| 87 | }
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| 88 | }
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| 89 | }
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| 90 | return (BUFFER_HANDLE)result;
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| 91 | }
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| 92 |
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| 93 | // Codes_SRS_BUFFER_07_029: [ BUFFER_create_with_size shall create a BUFFER_HANDLE with a pre allocated underlying buffer size.]
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| 94 | BUFFER_HANDLE BUFFER_create_with_size(size_t buff_size)
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| 95 | {
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| 96 | BUFFER* result;
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| 97 | result = (BUFFER*)calloc(1, sizeof(BUFFER));
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| 98 | if (result != NULL)
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| 99 | {
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| 100 | if (buff_size == 0)
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| 101 | {
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| 102 | // Codes_SRS_BUFFER_07_030: [ If buff_size is 0 BUFFER_create_with_size shall create a valid non-NULL handle of zero size. ]
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| 103 | result->size = 0;
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| 104 | result->buffer = NULL;
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| 105 | }
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| 106 | else
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| 107 | {
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| 108 | // Codes_SRS_BUFFER_07_031: [ BUFFER_create_with_size shall allocate a buffer of buff_size. ]
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| 109 | result->size = buff_size;
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| 110 | if ((result->buffer = (unsigned char*)malloc(result->size)) == NULL)
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| 111 | {
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| 112 | // Codes_SRS_BUFFER_07_032: [ If allocating memory fails, then BUFFER_create_with_size shall return NULL. ]
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| 113 | LogError("unable to allocate buffer");
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| 114 | free(result);
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| 115 | result = NULL;
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| 116 | }
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| 117 | }
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| 118 | }
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| 119 | else
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| 120 | {
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| 121 | // Codes_SRS_BUFFER_07_032: [ If allocating memory fails, then BUFFER_create_with_size shall return NULL. ]
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| 122 | LogError("unable to allocate BUFFER");
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| 123 | }
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| 124 | // Codes_SRS_BUFFER_07_033: [ Otherwise, BUFFER_create_with_size shall return a non-NULL handle. ]
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| 125 | return (BUFFER_HANDLE)result;
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| 126 | }
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| 127 |
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| 128 | /* Codes_SRS_BUFFER_07_003: [BUFFER_delete shall delete the data associated with the BUFFER_HANDLE along with the Buffer.] */
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| 129 | void BUFFER_delete(BUFFER_HANDLE handle)
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| 130 | {
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| 131 | /* Codes_SRS_BUFFER_07_004: [BUFFER_delete shall not delete any BUFFER_HANDLE that is NULL.] */
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| 132 | if (handle != NULL)
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| 133 | {
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| 134 | BUFFER* b = (BUFFER*)handle;
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| 135 | if (b->buffer != NULL)
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| 136 | {
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| 137 | /* Codes_SRS_BUFFER_07_003: [BUFFER_delete shall delete the data associated with the BUFFER_HANDLE along with the Buffer.] */
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| 138 | free(b->buffer);
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| 139 | }
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| 140 | free(b);
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| 141 | }
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| 142 | }
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| 143 |
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| 144 | /*return 0 if the buffer was copied*/
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| 145 | /*else return different than zero*/
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| 146 | /* Codes_SRS_BUFFER_07_008: [BUFFER_build allocates size_t bytes, copies the unsigned char* into the buffer and returns zero on success.] */
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| 147 | int BUFFER_build(BUFFER_HANDLE handle, const unsigned char* source, size_t size)
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| 148 | {
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| 149 | int result;
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| 150 | if (handle == NULL)
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| 151 | {
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| 152 | /* Codes_SRS_BUFFER_07_009: [BUFFER_build shall return nonzero if handle is NULL ] */
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| 153 | result = MU_FAILURE;
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| 154 | }
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| 155 | /* Codes_SRS_BUFFER_01_002: [The size argument can be zero, in which case the underlying buffer held by the buffer instance shall be freed.] */
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| 156 | else if (size == 0)
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| 157 | {
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| 158 | /* Codes_SRS_BUFFER_01_003: [If size is zero, source can be NULL.] */
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| 159 | BUFFER* b = (BUFFER*)handle;
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| 160 | free(b->buffer);
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| 161 | b->buffer = NULL;
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| 162 | b->size = 0;
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| 163 |
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| 164 | result = 0;
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| 165 | }
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| 166 | else
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| 167 | {
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| 168 | if (source == NULL)
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| 169 | {
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| 170 | /* Codes_SRS_BUFFER_01_001: [If size is positive and source is NULL, BUFFER_build shall return nonzero] */
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| 171 | result = MU_FAILURE;
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| 172 | }
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| 173 | else
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| 174 | {
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| 175 | BUFFER* b = (BUFFER*)handle;
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| 176 | /* Codes_SRS_BUFFER_07_011: [BUFFER_build shall overwrite previous contents if the buffer has been previously allocated.] */
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| 177 | unsigned char* newBuffer = (unsigned char*)realloc(b->buffer, size);
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| 178 | if (newBuffer == NULL)
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| 179 | {
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| 180 | /* Codes_SRS_BUFFER_07_010: [BUFFER_build shall return nonzero if any error is encountered.] */
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| 181 | LogError("Failure reallocating buffer");
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| 182 | result = MU_FAILURE;
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| 183 | }
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| 184 | else
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| 185 | {
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| 186 | b->buffer = newBuffer;
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| 187 | b->size = size;
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| 188 | /* Codes_SRS_BUFFER_01_002: [The size argument can be zero, in which case nothing shall be copied from source.] */
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| 189 | (void)memcpy(b->buffer, source, size);
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| 190 |
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| 191 | result = 0;
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| 192 | }
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| 193 | }
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| 194 | }
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| 195 |
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| 196 | return result;
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| 197 | }
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| 198 |
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| 199 | int BUFFER_append_build(BUFFER_HANDLE handle, const unsigned char* source, size_t size)
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| 200 | {
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| 201 | int result;
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| 202 | if (handle == NULL || source == NULL || size == 0)
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| 203 | {
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| 204 | /* Codes_SRS_BUFFER_07_029: [ BUFFER_append_build shall return nonzero if handle or source are NULL or if size is 0. ] */
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| 205 | LogError("BUFFER_append_build failed invalid parameter handle: %p, source: %p, size: %lu", handle, source, (unsigned long)size);
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| 206 | result = MU_FAILURE;
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| 207 | }
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| 208 | else
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| 209 | {
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| 210 | if (handle->buffer == NULL)
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| 211 | {
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| 212 | /* Codes_SRS_BUFFER_07_030: [ if handle->buffer is NULL BUFFER_append_build shall allocate the a buffer of size bytes... ] */
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| 213 | if (BUFFER_safemalloc(handle, size) != 0)
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| 214 | {
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| 215 | /* Codes_SRS_BUFFER_07_035: [ If any error is encountered BUFFER_append_build shall return a non-null value. ] */
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| 216 | LogError("Failure with BUFFER_safemalloc");
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| 217 | result = MU_FAILURE;
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| 218 | }
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| 219 | else
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| 220 | {
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| 221 | /* Codes_SRS_BUFFER_07_031: [ ... and copy the contents of source to handle->buffer. ] */
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| 222 | (void)memcpy(handle->buffer, source, size);
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| 223 | /* Codes_SRS_BUFFER_07_034: [ On success BUFFER_append_build shall return 0 ] */
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| 224 | result = 0;
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| 225 | }
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| 226 | }
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| 227 | else
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| 228 | {
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| 229 | /* Codes_SRS_BUFFER_07_032: [ if handle->buffer is not NULL BUFFER_append_build shall realloc the buffer to be the handle->size + size ] */
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| 230 | unsigned char* temp = (unsigned char*)realloc(handle->buffer, handle->size + size);
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| 231 | if (temp == NULL)
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| 232 | {
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| 233 | /* Codes_SRS_BUFFER_07_035: [ If any error is encountered BUFFER_append_build shall return a non-null value. ] */
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| 234 | LogError("Failure reallocating temporary buffer");
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| 235 | result = MU_FAILURE;
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| 236 | }
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| 237 | else
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| 238 | {
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| 239 | /* Codes_SRS_BUFFER_07_033: [ ... and copy the contents of source to the end of the buffer. ] */
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| 240 | handle->buffer = temp;
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| 241 | // Append the BUFFER
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| 242 | (void)memcpy(&handle->buffer[handle->size], source, size);
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| 243 | handle->size += size;
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| 244 | /* Codes_SRS_BUFFER_07_034: [ On success BUFFER_append_build shall return 0 ] */
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| 245 | result = 0;
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| 246 | }
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| 247 | }
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| 248 | }
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| 249 | return result;
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| 250 | }
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| 251 |
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| 252 | /*return 0 if the buffer was pre-build(that is, had its space allocated)*/
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| 253 | /*else return different than zero*/
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| 254 | /* Codes_SRS_BUFFER_07_005: [BUFFER_pre_build allocates size_t bytes of BUFFER_HANDLE and returns zero on success.] */
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| 255 | int BUFFER_pre_build(BUFFER_HANDLE handle, size_t size)
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| 256 | {
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| 257 | int result;
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| 258 | if (handle == NULL)
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| 259 | {
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| 260 | /* Codes_SRS_BUFFER_07_006: [If handle is NULL or size is 0 then BUFFER_pre_build shall return a nonzero value.] */
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| 261 | result = MU_FAILURE;
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| 262 | }
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| 263 | else if (size == 0)
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| 264 | {
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| 265 | /* Codes_SRS_BUFFER_07_006: [If handle is NULL or size is 0 then BUFFER_pre_build shall return a nonzero value.] */
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| 266 | result = MU_FAILURE;
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| 267 | }
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| 268 | else
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| 269 | {
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| 270 | BUFFER* b = (BUFFER*)handle;
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| 271 | if (b->buffer != NULL)
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| 272 | {
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| 273 | /* Codes_SRS_BUFFER_07_007: [BUFFER_pre_build shall return nonzero if the buffer has been previously allocated and is not NULL.] */
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| 274 | LogError("Failure buffer data is NULL");
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| 275 | result = MU_FAILURE;
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| 276 | }
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| 277 | else
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| 278 | {
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| 279 | if ((b->buffer = (unsigned char*)malloc(size)) == NULL)
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| 280 | {
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| 281 | /* Codes_SRS_BUFFER_07_013: [BUFFER_pre_build shall return nonzero if any error is encountered.] */
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| 282 | LogError("Failure allocating buffer");
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| 283 | result = MU_FAILURE;
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| 284 | }
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| 285 | else
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| 286 | {
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| 287 | b->size = size;
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| 288 | result = 0;
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| 289 | }
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| 290 | }
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| 291 | }
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| 292 | return result;
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| 293 | }
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| 294 |
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| 295 | /* Codes_SRS_BUFFER_07_019: [BUFFER_content shall return the data contained within the BUFFER_HANDLE.] */
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| 296 | int BUFFER_content(BUFFER_HANDLE handle, const unsigned char** content)
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| 297 | {
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| 298 | int result;
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| 299 | if ((handle == NULL) || (content == NULL))
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| 300 | {
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| 301 | /* Codes_SRS_BUFFER_07_020: [If the handle and/or content*is NULL BUFFER_content shall return nonzero.] */
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| 302 | result = MU_FAILURE;
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| 303 | }
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| 304 | else
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| 305 | {
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| 306 | BUFFER* b = (BUFFER*)handle;
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| 307 | *content = b->buffer;
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| 308 | result = 0;
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| 309 | }
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| 310 | return result;
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| 311 | }
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| 312 |
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| 313 | /*return 0 if everything went ok and whatever was built in the buffer was unbuilt*/
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| 314 | /* Codes_SRS_BUFFER_07_012: [BUFFER_unbuild shall clear the underlying unsigned char* data associated with the BUFFER_HANDLE this will return zero on success.] */
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| 315 | extern int BUFFER_unbuild(BUFFER_HANDLE handle)
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| 316 | {
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| 317 | int result;
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| 318 | if (handle == NULL)
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| 319 | {
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| 320 | /* Codes_SRS_BUFFER_07_014: [BUFFER_unbuild shall return a nonzero value if BUFFER_HANDLE is NULL.] */
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| 321 | LogError("Failure: handle is invalid.");
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| 322 | result = MU_FAILURE;
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| 323 | }
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| 324 | else
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| 325 | {
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| 326 | BUFFER* b = (BUFFER*)handle;
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| 327 | if (b->buffer != NULL)
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| 328 | {
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| 329 | free(b->buffer);
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| 330 | b->buffer = NULL;
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| 331 | b->size = 0;
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| 332 |
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| 333 | }
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| 334 |
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| 335 | /* Codes_SRS_BUFFER_07_015: [BUFFER_unbuild shall always return success if the unsigned char* referenced by BUFFER_HANDLE is NULL.] */
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| 336 | result = 0;
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| 337 | }
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| 338 | return result;
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| 339 | }
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| 340 |
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| 341 | /* Codes_SRS_BUFFER_07_016: [BUFFER_enlarge shall increase the size of the unsigned char* referenced by BUFFER_HANDLE.] */
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| 342 | int BUFFER_enlarge(BUFFER_HANDLE handle, size_t enlargeSize)
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| 343 | {
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| 344 | int result;
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| 345 | if (handle == NULL)
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| 346 | {
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| 347 | /* Codes_SRS_BUFFER_07_017: [BUFFER_enlarge shall return a nonzero result if any parameters are NULL or zero.] */
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| 348 | LogError("Failure: handle is invalid.");
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| 349 | result = MU_FAILURE;
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| 350 | }
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| 351 | else if (enlargeSize == 0)
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| 352 | {
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| 353 | /* Codes_SRS_BUFFER_07_017: [BUFFER_enlarge shall return a nonzero result if any parameters are NULL or zero.] */
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| 354 | LogError("Failure: enlargeSize size is 0.");
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| 355 | result = MU_FAILURE;
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| 356 | }
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| 357 | else
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| 358 | {
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| 359 | BUFFER* b = (BUFFER*)handle;
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| 360 | unsigned char* temp = (unsigned char*)realloc(b->buffer, b->size + enlargeSize);
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| 361 | if (temp == NULL)
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| 362 | {
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| 363 | /* Codes_SRS_BUFFER_07_018: [BUFFER_enlarge shall return a nonzero result if any error is encountered.] */
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| 364 | LogError("Failure: allocating temp buffer.");
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| 365 | result = MU_FAILURE;
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| 366 | }
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| 367 | else
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| 368 | {
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| 369 | b->buffer = temp;
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| 370 | b->size += enlargeSize;
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| 371 | result = 0;
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| 372 | }
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| 373 | }
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| 374 | return result;
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| 375 | }
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| 376 |
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| 377 | int BUFFER_shrink(BUFFER_HANDLE handle, size_t decreaseSize, bool fromEnd)
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| 378 | {
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| 379 | int result;
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| 380 | if (handle == NULL)
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| 381 | {
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| 382 | /* Codes_SRS_BUFFER_07_036: [ if handle is NULL, BUFFER_shrink shall return a non-null value ]*/
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| 383 | LogError("Failure: handle is invalid.");
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| 384 | result = MU_FAILURE;
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| 385 | }
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| 386 | else if (decreaseSize == 0)
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| 387 | {
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| 388 | /* Codes_SRS_BUFFER_07_037: [ If decreaseSize is equal zero, BUFFER_shrink shall return a non-null value ] */
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| 389 | LogError("Failure: decrease size is 0.");
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| 390 | result = MU_FAILURE;
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| 391 | }
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| 392 | else if (decreaseSize > handle->size)
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| 393 | {
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| 394 | /* Codes_SRS_BUFFER_07_038: [ If decreaseSize is less than the size of the buffer, BUFFER_shrink shall return a non-null value ] */
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| 395 | LogError("Failure: decrease size is less than buffer size.");
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| 396 | result = MU_FAILURE;
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| 397 | }
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| 398 | else
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| 399 | {
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| 400 | /* Codes_SRS_BUFFER_07_039: [ BUFFER_shrink shall allocate a temporary buffer of existing buffer size minus decreaseSize. ] */
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| 401 | size_t alloc_size = handle->size - decreaseSize;
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| 402 | if (alloc_size == 0)
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| 403 | {
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| 404 | /* Codes_SRS_BUFFER_07_043: [ If the decreaseSize is equal the buffer size , BUFFER_shrink shall deallocate the buffer and set the size to zero. ] */
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| 405 | free(handle->buffer);
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| 406 | handle->buffer = NULL;
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| 407 | handle->size = 0;
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| 408 | result = 0;
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| 409 | }
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| 410 | else
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| 411 | {
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| 412 | unsigned char* tmp = malloc(alloc_size);
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| 413 | if (tmp == NULL)
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| 414 | {
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| 415 | /* Codes_SRS_BUFFER_07_042: [ If a failure is encountered, BUFFER_shrink shall return a non-null value ] */
|
---|
| 416 | LogError("Failure: allocating temp buffer.");
|
---|
| 417 | result = MU_FAILURE;
|
---|
| 418 | }
|
---|
| 419 | else
|
---|
| 420 | {
|
---|
| 421 | if (fromEnd)
|
---|
| 422 | {
|
---|
| 423 | /* Codes_SRS_BUFFER_07_040: [ if the fromEnd variable is true, BUFFER_shrink shall remove the end of the buffer of size decreaseSize. ] */
|
---|
| 424 | memcpy(tmp, handle->buffer, alloc_size);
|
---|
| 425 | free(handle->buffer);
|
---|
| 426 | handle->buffer = tmp;
|
---|
| 427 | handle->size = alloc_size;
|
---|
| 428 | result = 0;
|
---|
| 429 | }
|
---|
| 430 | else
|
---|
| 431 | {
|
---|
| 432 | /* Codes_SRS_BUFFER_07_041: [ if the fromEnd variable is false, BUFFER_shrink shall remove the beginning of the buffer of size decreaseSize. ] */
|
---|
| 433 | memcpy(tmp, handle->buffer + decreaseSize, alloc_size);
|
---|
| 434 | free(handle->buffer);
|
---|
| 435 | handle->buffer = tmp;
|
---|
| 436 | handle->size = alloc_size;
|
---|
| 437 | result = 0;
|
---|
| 438 | }
|
---|
| 439 | }
|
---|
| 440 | }
|
---|
| 441 | }
|
---|
| 442 | return result;
|
---|
| 443 | }
|
---|
| 444 |
|
---|
| 445 | /* Codes_SRS_BUFFER_07_021: [BUFFER_size shall place the size of the associated buffer in the size variable and return zero on success.] */
|
---|
| 446 | int BUFFER_size(BUFFER_HANDLE handle, size_t* size)
|
---|
| 447 | {
|
---|
| 448 | int result;
|
---|
| 449 | if ((handle == NULL) || (size == NULL))
|
---|
| 450 | {
|
---|
| 451 | /* Codes_SRS_BUFFER_07_022: [BUFFER_size shall return a nonzero value for any error that is encountered.] */
|
---|
| 452 | result = MU_FAILURE;
|
---|
| 453 | }
|
---|
| 454 | else
|
---|
| 455 | {
|
---|
| 456 | BUFFER* b = (BUFFER*)handle;
|
---|
| 457 | *size = b->size;
|
---|
| 458 | result = 0;
|
---|
| 459 | }
|
---|
| 460 | return result;
|
---|
| 461 | }
|
---|
| 462 |
|
---|
| 463 | /* Codes_SRS_BUFFER_07_024: [BUFFER_append concatenates b2 onto b1 without modifying b2 and shall return zero on success.] */
|
---|
| 464 | int BUFFER_append(BUFFER_HANDLE handle1, BUFFER_HANDLE handle2)
|
---|
| 465 | {
|
---|
| 466 | int result;
|
---|
| 467 | if ( (handle1 == NULL) || (handle2 == NULL) || (handle1 == handle2) )
|
---|
| 468 | {
|
---|
| 469 | /* Codes_SRS_BUFFER_07_023: [BUFFER_append shall return a nonzero upon any error that is encountered.] */
|
---|
| 470 | result = MU_FAILURE;
|
---|
| 471 | }
|
---|
| 472 | else
|
---|
| 473 | {
|
---|
| 474 | BUFFER* b1 = (BUFFER*)handle1;
|
---|
| 475 | BUFFER* b2 = (BUFFER*)handle2;
|
---|
| 476 | if (b1->buffer == NULL)
|
---|
| 477 | {
|
---|
| 478 | /* Codes_SRS_BUFFER_07_023: [BUFFER_append shall return a nonzero upon any error that is encountered.] */
|
---|
| 479 | result = MU_FAILURE;
|
---|
| 480 | }
|
---|
| 481 | else if (b2->buffer == NULL)
|
---|
| 482 | {
|
---|
| 483 | /* Codes_SRS_BUFFER_07_023: [BUFFER_append shall return a nonzero upon any error that is encountered.] */
|
---|
| 484 | result = MU_FAILURE;
|
---|
| 485 | }
|
---|
| 486 | else
|
---|
| 487 | {
|
---|
| 488 | if (b2->size ==0)
|
---|
| 489 | {
|
---|
| 490 | // b2->size = 0, whatever b1->size is, do nothing
|
---|
| 491 | result = 0;
|
---|
| 492 | }
|
---|
| 493 | else
|
---|
| 494 | {
|
---|
| 495 | // b2->size != 0, whatever b1->size is
|
---|
| 496 | unsigned char* temp = (unsigned char*)realloc(b1->buffer, b1->size + b2->size);
|
---|
| 497 | if (temp == NULL)
|
---|
| 498 | {
|
---|
| 499 | /* Codes_SRS_BUFFER_07_023: [BUFFER_append shall return a nonzero upon any error that is encountered.] */
|
---|
| 500 | LogError("Failure: allocating temp buffer.");
|
---|
| 501 | result = MU_FAILURE;
|
---|
| 502 | }
|
---|
| 503 | else
|
---|
| 504 | {
|
---|
| 505 | /* Codes_SRS_BUFFER_07_024: [BUFFER_append concatenates b2 onto b1 without modifying b2 and shall return zero on success.]*/
|
---|
| 506 | b1->buffer = temp;
|
---|
| 507 | // Append the BUFFER
|
---|
| 508 | (void)memcpy(&b1->buffer[b1->size], b2->buffer, b2->size);
|
---|
| 509 | b1->size += b2->size;
|
---|
| 510 | result = 0;
|
---|
| 511 | }
|
---|
| 512 | }
|
---|
| 513 | }
|
---|
| 514 | }
|
---|
| 515 | return result;
|
---|
| 516 | }
|
---|
| 517 |
|
---|
| 518 | int BUFFER_prepend(BUFFER_HANDLE handle1, BUFFER_HANDLE handle2)
|
---|
| 519 | {
|
---|
| 520 | int result;
|
---|
| 521 | if ((handle1 == NULL) || (handle2 == NULL) || (handle1 == handle2))
|
---|
| 522 | {
|
---|
| 523 | /* Codes_SRS_BUFFER_01_005: [ BUFFER_prepend shall return a non-zero upon value any error that is encountered. ]*/
|
---|
| 524 | result = MU_FAILURE;
|
---|
| 525 | }
|
---|
| 526 | else
|
---|
| 527 | {
|
---|
| 528 | BUFFER* b1 = (BUFFER*)handle1;
|
---|
| 529 | BUFFER* b2 = (BUFFER*)handle2;
|
---|
| 530 | if (b1->buffer == NULL)
|
---|
| 531 | {
|
---|
| 532 | /* Codes_SRS_BUFFER_01_005: [ BUFFER_prepend shall return a non-zero upon value any error that is encountered. ]*/
|
---|
| 533 | result = MU_FAILURE;
|
---|
| 534 | }
|
---|
| 535 | else if (b2->buffer == NULL)
|
---|
| 536 | {
|
---|
| 537 | /* Codes_SRS_BUFFER_01_005: [ BUFFER_prepend shall return a non-zero upon value any error that is encountered. ]*/
|
---|
| 538 | result = MU_FAILURE;
|
---|
| 539 | }
|
---|
| 540 | else
|
---|
| 541 | {
|
---|
| 542 | //put b2 ahead of b1: [b2][b1], return b1
|
---|
| 543 | if (b2->size ==0)
|
---|
| 544 | {
|
---|
| 545 | // do nothing
|
---|
| 546 | result = 0;
|
---|
| 547 | }
|
---|
| 548 | else
|
---|
| 549 | {
|
---|
| 550 | // b2->size != 0
|
---|
| 551 | unsigned char* temp = (unsigned char*)malloc(b1->size + b2->size);
|
---|
| 552 | if (temp == NULL)
|
---|
| 553 | {
|
---|
| 554 | /* Codes_SRS_BUFFER_01_005: [ BUFFER_prepend shall return a non-zero upon value any error that is encountered. ]*/
|
---|
| 555 | LogError("Failure: allocating temp buffer.");
|
---|
| 556 | result = MU_FAILURE;
|
---|
| 557 | }
|
---|
| 558 | else
|
---|
| 559 | {
|
---|
| 560 | /* Codes_SRS_BUFFER_01_004: [ BUFFER_prepend concatenates handle1 onto handle2 without modifying handle1 and shall return zero on success. ]*/
|
---|
| 561 | // Append the BUFFER
|
---|
| 562 | (void)memcpy(temp, b2->buffer, b2->size);
|
---|
| 563 | // start from b1->size to append b1
|
---|
| 564 | (void)memcpy(&temp[b2->size], b1->buffer, b1->size);
|
---|
| 565 | free(b1->buffer);
|
---|
| 566 | b1->buffer = temp;
|
---|
| 567 | b1->size += b2->size;
|
---|
| 568 | result = 0;
|
---|
| 569 | }
|
---|
| 570 | }
|
---|
| 571 | }
|
---|
| 572 | }
|
---|
| 573 | return result;
|
---|
| 574 | }
|
---|
| 575 |
|
---|
| 576 | int BUFFER_fill(BUFFER_HANDLE handle, unsigned char fill_char)
|
---|
| 577 | {
|
---|
| 578 | int result;
|
---|
| 579 | if (handle == NULL)
|
---|
| 580 | {
|
---|
| 581 | /* Codes_SRS_BUFFER_07_002: [ If handle is NULL BUFFER_fill shall return a non-zero value. ] */
|
---|
| 582 | LogError("Invalid parameter specified, handle == NULL.");
|
---|
| 583 | result = MU_FAILURE;
|
---|
| 584 | }
|
---|
| 585 | else
|
---|
| 586 | {
|
---|
| 587 | size_t index;
|
---|
| 588 | /* Codes_SRS_BUFFER_07_001: [ BUFFER_fill shall fill the supplied BUFFER_HANDLE with the supplied fill character. ] */
|
---|
| 589 | BUFFER* buffer_data = (BUFFER*)handle;
|
---|
| 590 | for (index = 0; index < buffer_data->size; index++)
|
---|
| 591 | {
|
---|
| 592 | buffer_data->buffer[index] = fill_char;
|
---|
| 593 | }
|
---|
| 594 | result = 0;
|
---|
| 595 | }
|
---|
| 596 | return result;
|
---|
| 597 | }
|
---|
| 598 |
|
---|
| 599 |
|
---|
| 600 | /* Codes_SRS_BUFFER_07_025: [BUFFER_u_char shall return a pointer to the underlying unsigned char*.] */
|
---|
| 601 | unsigned char* BUFFER_u_char(BUFFER_HANDLE handle)
|
---|
| 602 | {
|
---|
| 603 | BUFFER* handleData = (BUFFER*)handle;
|
---|
| 604 | unsigned char* result;
|
---|
| 605 | if (handle == NULL || handleData->size == 0)
|
---|
| 606 | {
|
---|
| 607 | /* Codes_SRS_BUFFER_07_026: [BUFFER_u_char shall return NULL for any error that is encountered.] */
|
---|
| 608 | /* Codes_SRS_BUFFER_07_029: [BUFFER_u_char shall return NULL if underlying buffer size is zero.] */
|
---|
| 609 | result = NULL;
|
---|
| 610 | }
|
---|
| 611 | else
|
---|
| 612 | {
|
---|
| 613 | result = handleData->buffer;
|
---|
| 614 | }
|
---|
| 615 | return result;
|
---|
| 616 | }
|
---|
| 617 |
|
---|
| 618 | /* Codes_SRS_BUFFER_07_027: [BUFFER_length shall return the size of the underlying buffer.] */
|
---|
| 619 | size_t BUFFER_length(BUFFER_HANDLE handle)
|
---|
| 620 | {
|
---|
| 621 | size_t result;
|
---|
| 622 | if (handle == NULL)
|
---|
| 623 | {
|
---|
| 624 | /* Codes_SRS_BUFFER_07_028: [BUFFER_length shall return zero for any error that is encountered.] */
|
---|
| 625 | result = 0;
|
---|
| 626 | }
|
---|
| 627 | else
|
---|
| 628 | {
|
---|
| 629 | BUFFER* b = (BUFFER*)handle;
|
---|
| 630 | result = b->size;
|
---|
| 631 | }
|
---|
| 632 | return result;
|
---|
| 633 | }
|
---|
| 634 |
|
---|
| 635 | BUFFER_HANDLE BUFFER_clone(BUFFER_HANDLE handle)
|
---|
| 636 | {
|
---|
| 637 | BUFFER_HANDLE result;
|
---|
| 638 | if (handle == NULL)
|
---|
| 639 | {
|
---|
| 640 | result = NULL;
|
---|
| 641 | }
|
---|
| 642 | else
|
---|
| 643 | {
|
---|
| 644 | BUFFER* suppliedBuff = (BUFFER*)handle;
|
---|
| 645 | BUFFER* b = (BUFFER*)calloc(1, sizeof(BUFFER));
|
---|
| 646 | if (b != NULL)
|
---|
| 647 | {
|
---|
| 648 | if (BUFFER_safemalloc(b, suppliedBuff->size) != 0)
|
---|
| 649 | {
|
---|
| 650 | free(b);
|
---|
| 651 | LogError("Failure: allocating temp buffer.");
|
---|
| 652 | result = NULL;
|
---|
| 653 | }
|
---|
| 654 | else
|
---|
| 655 | {
|
---|
| 656 | (void)memcpy(b->buffer, suppliedBuff->buffer, suppliedBuff->size);
|
---|
| 657 | b->size = suppliedBuff->size;
|
---|
| 658 | result = (BUFFER_HANDLE)b;
|
---|
| 659 | }
|
---|
| 660 | }
|
---|
| 661 | else
|
---|
| 662 | {
|
---|
| 663 | result = NULL;
|
---|
| 664 | }
|
---|
| 665 | }
|
---|
| 666 | return result;
|
---|
| 667 | }
|
---|