[144] | 1 | /*
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| 2 | * aJson
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| 3 | * stringbuffer.c
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| 4 | *
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| 5 | * http://interactive-matter.org/
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| 6 | *
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| 7 | * This file is part of aJson.
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| 8 | *
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| 9 | * aJson is free software: you can redistribute it and/or modify
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| 10 | * it under the terms of the GNU General Public License as published by
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| 11 | * the Free Software Foundation, either version 3 of the License, or
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| 12 | * (at your option) any later version.
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| 13 | *
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| 14 | * aJson is distributed in the hope that it will be useful,
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 17 | * GNU General Public License for more details.
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| 18 | * You should have received a copy of the GNU General Public License
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| 19 | * along with aJson. If not, see <http://www.gnu.org/licenses/>.
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| 20 | *
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| 21 | * Created on: 14.10.2010
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| 22 | * Author: marcus
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| 23 | */
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| 24 | #include <stdlib.h>
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| 25 | #include <string.h>
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| 26 | #include "include/aJson/stringbuffer.h"
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| 27 |
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| 28 | //Default buffer size for strings
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| 29 | #define BUFFER_SIZE 256
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| 30 | //there is a static buffer allocated, which is used to decode strings to
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| 31 | //strings cannot be longer than the buffer
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| 32 | char global_buffer[BUFFER_SIZE];
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| 33 |
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| 34 | string_buffer*
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| 35 | stringBufferCreate(void)
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| 36 | {
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| 37 | string_buffer* result = malloc(sizeof(string_buffer));
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| 38 | if (result == NULL)
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| 39 | {
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| 40 | return NULL;
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| 41 | }
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| 42 | result->string = global_buffer;
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| 43 | memset((void*) global_buffer, 0, BUFFER_SIZE);
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| 44 | //unused - but will be usefull after realloc got fixd
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| 45 | /* if (result->string==NULL) {
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| 46 | free(result);
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| 47 | return NULL;
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| 48 | }
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| 49 | result->memory=BUFFER_DEFAULT_SIZE;*/
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| 50 | result->memory = BUFFER_SIZE;
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| 51 | result->string_length = 0;
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| 52 | return result;
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| 53 | }
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| 54 |
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| 55 | char
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| 56 | stringBufferAdd(char value, string_buffer* buffer)
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| 57 | {
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| 58 | if (buffer->string_length >= buffer->memory)
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| 59 | {
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| 60 | //this has to be enabled after realloc works
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| 61 | /*char* new_string = (char*) realloc((void*) buffer->string, (buffer->memory
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| 62 | + BUFFER_DEFAULT_SIZE) * sizeof(char));
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| 63 | if (new_string == NULL)
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| 64 | {
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| 65 | free(buffer->string);
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| 66 | buffer->string = NULL;
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| 67 | return -1;
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| 68 | } else {
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| 69 | buffer->string = new_string;
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| 70 | }
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| 71 | buffer->memory += BUFFER_DEFAULT_SIZE;*/
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| 72 | //in the meantime we just drop it
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| 73 | return 0; //EOF would be a better choice - but that breaks json decoding
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| 74 | }
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| 75 | buffer->string[buffer->string_length] = value;
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| 76 | buffer->string_length += 1;
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| 77 | return 0;
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| 78 | }
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| 79 |
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| 80 | char*
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| 81 | stringBufferToString(string_buffer* buffer)
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| 82 | {
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| 83 | //this is the realloc dependent function - it does not work
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| 84 | // char* result = buffer->string;
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| 85 | //ensure that the string ends with 0
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| 86 | if (buffer->string_length == 0 || buffer->string[(buffer->string_length - 1)]
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| 87 | != 0)
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| 88 | {
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| 89 | stringBufferAdd(0, buffer);
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| 90 | }
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| 91 | /* char* string = realloc(result, buffer->string_length);
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| 92 | if (string==NULL) {
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| 93 | free(result);
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| 94 | }
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| 95 | buffer->string=NULL;
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| 96 | free(buffer);
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| 97 | return string;*/
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| 98 | char* result = malloc(buffer->string_length * sizeof(char));
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| 99 | if (result == NULL)
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| 100 | {
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| 101 | return NULL;
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| 102 | }
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| 103 | strcpy(result, global_buffer);
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| 104 | buffer->string = NULL;
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| 105 | free(buffer);
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| 106 | return result;
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| 107 | }
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| 108 |
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| 109 | void
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| 110 | stringBufferFree(string_buffer* buffer)
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| 111 | {
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| 112 | if (buffer == NULL)
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| 113 | {
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| 114 | //hmm it was null before - whatever
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| 115 | return;
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| 116 | }
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| 117 | //this is not needed in this realloc free concept
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| 118 | /*
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| 119 | if (buffer->string!=NULL) {
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| 120 | free(buffer->string);
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| 121 | }
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| 122 | */
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| 123 | free(buffer);
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| 124 | }
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| 125 |
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