memory.c

/*
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  This file is part of Etripator,
  copyright (c) 2009--2024 Vincent Cruz.
 
  Etripator is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
 
  Etripator is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
 
  You should have received a copy of the GNU General Public License
  along with Etripator.  If not, see <http://www.gnu.org/licenses/>.

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*/
#include "memory.h"
#include "message.h"

// Creates a new memory block.
bool memory_create(Memory *memory, size_t length) {
    assert(memory != NULL);

    bool ret = false;
    if(length == 0) {
        ERROR_MSG("Invalid length");
    } else {
        uint8_t *buffer = (uint8_t*)malloc(length);
        if(buffer == NULL) {
            ERROR_MSG("Unable to allocate %zu bytes: %s.", length, strerror(errno));
        } else {
            memory->data = buffer;
            memory->length = length;
            ret = true;
        }
    }
    return ret;
}

// Releases memory block resources.
void memory_destroy(Memory *memory) {
    assert(memory != NULL);
    free(memory->data);
    memory->data = NULL;
    memory->length = 0;
}

// Fills a memory block with a given byte value.
bool memory_fill(Memory *memory, uint8_t c) {
    assert(memory != NULL);
    bool ret = false;
    if(memory->data != NULL) {
        const size_t n = memory->length;
        for(size_t i=0; i<n; i++) {
            memory->data[i] = c;
        }
        ret = true;
    }
    return ret;
}