mirror of
https://github.com/Proxmark/proxmark3.git
synced 2025-11-01 00:56:00 +08:00
556826b5d5
* added default params file * added jansson * added test function. * added tlv tree to function * add params from json works * added to `hf emv exec`: load params from json and some refactoring * added `scan` command
111 lines
2.5 KiB
C
111 lines
2.5 KiB
C
/*
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* Copyright (c) 2009-2016 Petri Lehtinen <petri@digip.org>
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*
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* Jansson is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#include <stdlib.h>
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#include <string.h>
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#include "jansson_private.h"
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#include "strbuffer.h"
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#define STRBUFFER_MIN_SIZE 16
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#define STRBUFFER_FACTOR 2
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#define STRBUFFER_SIZE_MAX ((size_t)-1)
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int strbuffer_init(strbuffer_t *strbuff)
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{
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strbuff->size = STRBUFFER_MIN_SIZE;
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strbuff->length = 0;
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strbuff->value = jsonp_malloc(strbuff->size);
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if(!strbuff->value)
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return -1;
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/* initialize to empty */
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strbuff->value[0] = '\0';
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return 0;
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}
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void strbuffer_close(strbuffer_t *strbuff)
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{
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if(strbuff->value)
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jsonp_free(strbuff->value);
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strbuff->size = 0;
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strbuff->length = 0;
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strbuff->value = NULL;
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}
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void strbuffer_clear(strbuffer_t *strbuff)
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{
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strbuff->length = 0;
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strbuff->value[0] = '\0';
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}
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const char *strbuffer_value(const strbuffer_t *strbuff)
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{
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return strbuff->value;
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}
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char *strbuffer_steal_value(strbuffer_t *strbuff)
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{
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char *result = strbuff->value;
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strbuff->value = NULL;
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return result;
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}
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int strbuffer_append_byte(strbuffer_t *strbuff, char byte)
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{
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return strbuffer_append_bytes(strbuff, &byte, 1);
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}
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int strbuffer_append_bytes(strbuffer_t *strbuff, const char *data, size_t size)
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{
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if(size >= strbuff->size - strbuff->length)
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{
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size_t new_size;
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char *new_value;
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/* avoid integer overflow */
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if (strbuff->size > STRBUFFER_SIZE_MAX / STRBUFFER_FACTOR
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|| size > STRBUFFER_SIZE_MAX - 1
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|| strbuff->length > STRBUFFER_SIZE_MAX - 1 - size)
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return -1;
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new_size = max(strbuff->size * STRBUFFER_FACTOR,
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strbuff->length + size + 1);
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new_value = jsonp_malloc(new_size);
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if(!new_value)
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return -1;
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memcpy(new_value, strbuff->value, strbuff->length);
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jsonp_free(strbuff->value);
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strbuff->value = new_value;
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strbuff->size = new_size;
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}
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memcpy(strbuff->value + strbuff->length, data, size);
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strbuff->length += size;
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strbuff->value[strbuff->length] = '\0';
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return 0;
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}
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char strbuffer_pop(strbuffer_t *strbuff)
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{
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if(strbuff->length > 0) {
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char c = strbuff->value[--strbuff->length];
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strbuff->value[strbuff->length] = '\0';
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return c;
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}
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else
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return '\0';
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}
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