118 lines
3.3 KiB
C
118 lines
3.3 KiB
C
/*
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Copyright (C) 2003, 2010 - Wolfire Games
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Copyright (C) 2010-2017 - Lugaru contributors (see AUTHORS file)
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This file is part of Lugaru.
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Lugaru is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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Lugaru is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Lugaru. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "binio.h"
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#include "private.h"
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#include <stdlib.h>
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struct BinIOUnpackContext {
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const uint8_t *data;
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va_list args;
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};
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static void BinIOUnpack(void *context, int type, int byte_order, int count)
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{
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struct BinIOUnpackContext *ctx = (struct BinIOUnpackContext*)context;
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if (count == -1) {
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count = 1;
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}
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switch (type) {
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case BinIO_TYPE_IGNORE_BYTE:
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ctx->data += 1 * count;
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break;
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case BinIO_TYPE_BYTE:
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BinIOConvert1(byte_order, BinIO_HOST_BYTE_ORDER, ctx->data, va_arg(ctx->args, uint8_t *), count);
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ctx->data += 1 * count;
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break;
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case BinIO_TYPE_INT16:
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BinIOConvert2(byte_order, BinIO_HOST_BYTE_ORDER, ctx->data, va_arg(ctx->args, uint8_t *), count);
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ctx->data += 2 * count;
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break;
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case BinIO_TYPE_INT32:
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BinIOConvert4(byte_order, BinIO_HOST_BYTE_ORDER, ctx->data, va_arg(ctx->args, uint8_t *), count);
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ctx->data += 4 * count;
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break;
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case BinIO_TYPE_INT64:
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BinIOConvert8(byte_order, BinIO_HOST_BYTE_ORDER, ctx->data, va_arg(ctx->args, uint8_t *), count);
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ctx->data += 8 * count;
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break;
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case BinIO_TYPE_FLOAT32:
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BinIOConvert4(byte_order, BinIO_HOST_BYTE_ORDER, ctx->data, va_arg(ctx->args, uint8_t *), count);
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ctx->data += 4 * count;
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break;
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case BinIO_TYPE_FLOAT64:
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BinIOConvert8(byte_order, BinIO_HOST_BYTE_ORDER, ctx->data, va_arg(ctx->args, uint8_t *), count);
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ctx->data += 8 * count;
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break;
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}
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}
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void unpackf(const char *format, ...)
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{
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va_list args;
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va_start(args, format);
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vfunpackf(stdin, format, args);
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va_end(args);
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}
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void sunpackf(const void *buffer, const char *format, ...)
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{
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va_list args;
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va_start(args, format);
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vsunpackf(buffer, format, args);
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va_end(args);
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}
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void funpackf(FILE *file, const char *format, ...)
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{
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va_list args;
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va_start(args, format);
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vfunpackf(file, format, args);
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va_end(args);
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}
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void vsunpackf(const void *buffer, const char *format, va_list args)
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{
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struct BinIOFormatCursor cursor;
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struct BinIOUnpackContext context;
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BinIOInitFormatCursor(&cursor, format);
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context.data = (const unsigned char*)buffer;
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va_copy(context.args, args);
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while (BinIONextChar(&context, &cursor, BinIOUnpack)) {}
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va_end(context.args);
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}
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void vfunpackf(FILE *file, const char *format, va_list args)
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{
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size_t n_bytes = BinIOFormatByteCount(format);
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void* buffer = malloc(n_bytes);
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fread(buffer, n_bytes, 1, file);
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vsunpackf(buffer, format, args);
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free(buffer);
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}
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