--- /dev/null
+/*
+ * The 3D Studio File Format Library
+ * Copyright (C) 1996-2001 by J.E. Hoffmann <je-h@gmx.net>
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or (at
+ * your option) any later version.
+ *
+ * This program 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 Lesser General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * $Id: io.c,v 1.3 2001/07/11 13:47:35 jeh Exp $
+ */
+#define LIB3DS_EXPORT
+#include <lib3ds/io.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+/*!
+ * \defgroup io Binary Input/Ouput Abstraction Layer
+ *
+ * \author J.E. Hoffmann <je-h@gmx.net>
+ */
+
+
+struct _Lib3dsIo {
+ void *self;
+ Lib3dsIoErrorFunc error_func;
+ Lib3dsIoSeekFunc seek_func;
+ Lib3dsIoTellFunc tell_func;
+ Lib3dsIoReadFunc read_func;
+ Lib3dsIoWriteFunc write_func;
+};
+
+
+Lib3dsIo*
+lib3ds_io_new(void *self, Lib3dsIoErrorFunc error_func, Lib3dsIoSeekFunc seek_func,
+ Lib3dsIoTellFunc tell_func, Lib3dsIoReadFunc read_func, Lib3dsIoWriteFunc write_func)
+{
+ Lib3dsIo *io = calloc(sizeof(Lib3dsIo),1);
+ ASSERT(io);
+ if (!io) {
+ return 0;
+ }
+
+ io->self = self;
+ io->error_func = error_func;
+ io->seek_func = seek_func;
+ io->tell_func = tell_func;
+ io->read_func = read_func;
+ io->write_func = write_func;
+
+ return io;
+}
+
+
+void
+lib3ds_io_free(Lib3dsIo *io)
+{
+ ASSERT(io);
+ if (!io) {
+ return;
+ }
+ free(io);
+}
+
+
+Lib3dsBool
+lib3ds_io_error(Lib3dsIo *io)
+{
+ ASSERT(io);
+ if (!io || !io->error_func) {
+ return 0;
+ }
+ return (*io->error_func)(io->self);
+}
+
+
+long
+lib3ds_io_seek(Lib3dsIo *io, long offset, Lib3dsIoSeek origin)
+{
+ ASSERT(io);
+ if (!io || !io->seek_func) {
+ return 0;
+ }
+ return (*io->seek_func)(io->self, offset, origin);
+}
+
+
+long
+lib3ds_io_tell(Lib3dsIo *io)
+{
+ ASSERT(io);
+ if (!io || !io->tell_func) {
+ return 0;
+ }
+ return (*io->tell_func)(io->self);
+}
+
+
+int
+lib3ds_io_read(Lib3dsIo *io, Lib3dsByte *buffer, int size)
+{
+ ASSERT(io);
+ if (!io || !io->read_func) {
+ return 0;
+ }
+ return (*io->read_func)(io->self, buffer, size);
+}
+
+
+int
+lib3ds_io_write(Lib3dsIo *io, const Lib3dsByte *buffer, int size)
+{
+ ASSERT(io);
+ if (!io || !io->write_func) {
+ return 0;
+ }
+ return (*io->write_func)(io->self, buffer, size);
+}
+
+
+/*!
+ * \ingroup io
+ *
+ * Read a byte from a file stream.
+ */
+Lib3dsByte
+lib3ds_io_read_byte(Lib3dsIo *io)
+{
+ Lib3dsByte b;
+
+ ASSERT(io);
+ lib3ds_io_read(io, &b, 1);
+ return(b);
+}
+
+
+/**
+ * Read a word from a file stream in little endian format.
+ */
+Lib3dsWord
+lib3ds_io_read_word(Lib3dsIo *io)
+{
+ Lib3dsByte b[2];
+ Lib3dsWord w;
+
+ ASSERT(io);
+ lib3ds_io_read(io, b, 2);
+ w=((Lib3dsWord)b[1] << 8) |
+ ((Lib3dsWord)b[0]);
+ return(w);
+}
+
+
+/*!
+ * \ingroup io
+ *
+ * Read a dword from file a stream in little endian format.
+ */
+Lib3dsDword
+lib3ds_io_read_dword(Lib3dsIo *io)
+{
+ Lib3dsByte b[4];
+ Lib3dsDword d;
+
+ ASSERT(io);
+ lib3ds_io_read(io, b, 4);
+ d=((Lib3dsDword)b[3] << 24) |
+ ((Lib3dsDword)b[2] << 16) |
+ ((Lib3dsDword)b[1] << 8) |
+ ((Lib3dsDword)b[0]);
+ return(d);
+}
+
+
+/*!
+ * \ingroup io
+ *
+ * Read a signed byte from a file stream.
+ */
+Lib3dsIntb
+lib3ds_io_read_intb(Lib3dsIo *io)
+{
+ Lib3dsIntb b;
+
+ ASSERT(io);
+ lib3ds_io_read(io, (Lib3dsByte*)&b, 1);
+ return(b);
+}
+
+
+/*!
+ * \ingroup io
+ *
+ * Read a signed word from a file stream in little endian format.
+ */
+Lib3dsIntw
+lib3ds_io_read_intw(Lib3dsIo *io)
+{
+ Lib3dsByte b[2];
+ Lib3dsWord w;
+
+ ASSERT(io);
+ lib3ds_io_read(io, b, 2);
+ w=((Lib3dsWord)b[1] << 8) |
+ ((Lib3dsWord)b[0]);
+ return((Lib3dsIntw)w);
+}
+
+
+/*!
+ * \ingroup io
+ *
+ * Read a signed dword a from file stream in little endian format.
+ */
+Lib3dsIntd
+lib3ds_io_read_intd(Lib3dsIo *io)
+{
+ Lib3dsByte b[4];
+ Lib3dsDword d;
+
+ ASSERT(io);
+ lib3ds_io_read(io, b, 4);
+ d=((Lib3dsDword)b[3] << 24) |
+ ((Lib3dsDword)b[2] << 16) |
+ ((Lib3dsDword)b[1] << 8) |
+ ((Lib3dsDword)b[0]);
+ return((Lib3dsIntd)d);
+}
+
+
+/*!
+ * \ingroup io
+ *
+ * Read a float from a file stream in little endian format.
+ */
+Lib3dsFloat
+lib3ds_io_read_float(Lib3dsIo *io)
+{
+ Lib3dsByte b[4];
+ Lib3dsDword d;
+
+ ASSERT(io);
+ lib3ds_io_read(io, b, 4);
+ d=((Lib3dsDword)b[3] << 24) |
+ ((Lib3dsDword)b[2] << 16) |
+ ((Lib3dsDword)b[1] << 8) |
+ ((Lib3dsDword)b[0]);
+ return(*((Lib3dsFloat*)&d));
+}
+
+
+/*!
+ * \ingroup io
+ * \ingroup vector
+ *
+ * Read a vector from a file stream in little endian format.
+ *
+ * \param io IO input handle.
+ * \param v The vector to store the data.
+ */
+Lib3dsBool
+lib3ds_io_read_vector(Lib3dsIo *io, Lib3dsVector v)
+{
+ ASSERT(io);
+
+ v[0]=lib3ds_io_read_float(io);
+ v[1]=lib3ds_io_read_float(io);
+ v[2]=lib3ds_io_read_float(io);
+
+ return(!lib3ds_io_error(io));
+}
+
+
+/*!
+ * \ingroup io
+ */
+Lib3dsBool
+lib3ds_io_read_rgb(Lib3dsIo *io, Lib3dsRgb rgb)
+{
+ ASSERT(io);
+
+ rgb[0]=lib3ds_io_read_float(io);
+ rgb[1]=lib3ds_io_read_float(io);
+ rgb[2]=lib3ds_io_read_float(io);
+
+ return(!lib3ds_io_error(io));
+}
+
+
+/*!
+ * \ingroup io
+ *
+ * Read a zero-terminated string from a file stream.
+ *
+ * \param io IO input handle.
+ * \param s The buffer to store the read string.
+ * \param buflen Buffer length.
+ *
+ * \return True on success, False otherwise.
+ */
+Lib3dsBool
+lib3ds_io_read_string(Lib3dsIo *io, char *s, int buflen)
+{
+ char c;
+ int k=0;
+
+ ASSERT(io);
+ for (;;) {
+ if (lib3ds_io_read(io, (Lib3dsByte*)&c, 1)!=1) {
+ return LIB3DS_FALSE;
+ }
+ *s++ = c;
+ if (!c) {
+ break;
+ }
+ ++k;
+ if (k>=buflen) {
+ return(LIB3DS_FALSE);
+ }
+ }
+
+ return(!lib3ds_io_error(io));
+}
+
+
+/*!
+ * \ingroup io
+ *
+ * Writes a byte into a file stream.
+ */
+Lib3dsBool
+lib3ds_io_write_byte(Lib3dsIo *io, Lib3dsByte b)
+{
+ ASSERT(io);
+ if (lib3ds_io_write(io, &b, 1)!=1) {
+ return(LIB3DS_FALSE);
+ }
+ return(LIB3DS_TRUE);
+}
+
+
+/*!
+ * \ingroup io
+ *
+ * Writes a word into a little endian file stream.
+ */
+Lib3dsBool
+lib3ds_io_write_word(Lib3dsIo *io, Lib3dsWord w)
+{
+ Lib3dsByte b[2];
+
+ ASSERT(io);
+ b[1]=((Lib3dsWord)w & 0xFF00) >> 8;
+ b[0]=((Lib3dsWord)w & 0x00FF);
+ if (lib3ds_io_write(io, b, 2)!=2) {
+ return(LIB3DS_FALSE);
+ }
+ return(LIB3DS_TRUE);
+}
+
+
+/*!
+ * \ingroup io
+ *
+ * Writes a dword into a little endian file stream.
+ */
+Lib3dsBool
+lib3ds_io_write_dword(Lib3dsIo *io, Lib3dsDword d)
+{
+ Lib3dsByte b[4];
+
+ ASSERT(io);
+ b[3]=(Lib3dsByte)(((Lib3dsDword)d & 0xFF000000) >> 24);
+ b[2]=(Lib3dsByte)(((Lib3dsDword)d & 0x00FF0000) >> 16);
+ b[1]=(Lib3dsByte)(((Lib3dsDword)d & 0x0000FF00) >> 8);
+ b[0]=(Lib3dsByte)(((Lib3dsDword)d & 0x000000FF));
+ if (lib3ds_io_write(io, b, 4)!=4) {
+ return(LIB3DS_FALSE);
+ }
+ return(LIB3DS_TRUE);
+}
+
+
+/*!
+ * \ingroup io
+ *
+ * Writes a signed byte in a file stream.
+ */
+Lib3dsBool
+lib3ds_io_write_intb(Lib3dsIo *io, Lib3dsIntb b)
+{
+ ASSERT(io);
+ if (lib3ds_io_write(io, (Lib3dsByte*)&b, 1)!=1) {
+ return(LIB3DS_FALSE);
+ }
+ return(LIB3DS_TRUE);
+}
+
+
+/*!
+ * \ingroup io
+ *
+ * Writes a signed word into a little endian file stream.
+ */
+Lib3dsBool
+lib3ds_io_write_intw(Lib3dsIo *io, Lib3dsIntw w)
+{
+ Lib3dsByte b[2];
+
+ ASSERT(io);
+ b[1]=((Lib3dsWord)w & 0xFF00) >> 8;
+ b[0]=((Lib3dsWord)w & 0x00FF);
+ if (lib3ds_io_write(io, b, 2)!=2) {
+ return(LIB3DS_FALSE);
+ }
+ return(LIB3DS_TRUE);
+}
+
+
+/*!
+ * \ingroup io
+ *
+ * Writes a signed dword into a little endian file stream.
+ */
+Lib3dsBool
+lib3ds_io_write_intd(Lib3dsIo *io, Lib3dsIntd d)
+{
+ Lib3dsByte b[4];
+
+ ASSERT(io);
+ b[3]=(Lib3dsByte)(((Lib3dsDword)d & 0xFF000000) >> 24);
+ b[2]=(Lib3dsByte)(((Lib3dsDword)d & 0x00FF0000) >> 16);
+ b[1]=(Lib3dsByte)(((Lib3dsDword)d & 0x0000FF00) >> 8);
+ b[0]=(Lib3dsByte)(((Lib3dsDword)d & 0x000000FF));
+ if (lib3ds_io_write(io, b, 4)!=4) {
+ return(LIB3DS_FALSE);
+ }
+ return(LIB3DS_TRUE);
+}
+
+
+/*!
+ * \ingroup io
+ *
+ * Writes a float into a little endian file stream.
+ */
+Lib3dsBool
+lib3ds_io_write_float(Lib3dsIo *io, Lib3dsFloat l)
+{
+ Lib3dsByte b[4];
+ Lib3dsDword d;
+
+ ASSERT(io);
+ d=*((Lib3dsDword*)&l);
+ b[3]=(Lib3dsByte)(((Lib3dsDword)d & 0xFF000000) >> 24);
+ b[2]=(Lib3dsByte)(((Lib3dsDword)d & 0x00FF0000) >> 16);
+ b[1]=(Lib3dsByte)(((Lib3dsDword)d & 0x0000FF00) >> 8);
+ b[0]=(Lib3dsByte)(((Lib3dsDword)d & 0x000000FF));
+ if (lib3ds_io_write(io, b, 4)!=4) {
+ return(LIB3DS_FALSE);
+ }
+ return(LIB3DS_TRUE);
+}
+
+
+/*!
+ * \ingroup io
+ * \ingroup vector
+ *
+ * Writes a vector into a file stream in little endian format.
+ */
+Lib3dsBool
+lib3ds_io_write_vector(Lib3dsIo *io, Lib3dsVector v)
+{
+ int i;
+ for (i=0; i<3; ++i) {
+ if (!lib3ds_io_write_float(io, v[i])) {
+ return(LIB3DS_FALSE);
+ }
+ }
+ return(LIB3DS_TRUE);
+}
+
+
+/*!
+ * \ingroup io
+ */
+Lib3dsBool
+lib3ds_io_write_rgb(Lib3dsIo *io, Lib3dsRgb rgb)
+{
+ int i;
+ for (i=0; i<3; ++i) {
+ if (!lib3ds_io_write_float(io, rgb[i])) {
+ return(LIB3DS_FALSE);
+ }
+ }
+ return(LIB3DS_TRUE);
+}
+
+
+/*!
+ * \ingroup io
+ *
+ * Writes a zero-terminated string into a file stream.
+ */
+Lib3dsBool
+lib3ds_io_write_string(Lib3dsIo *io, const char *s)
+{
+ ASSERT(s);
+ ASSERT(io);
+ lib3ds_io_write(io, (const Lib3dsByte*)s, strlen(s)+1);
+ return(!lib3ds_io_error(io));
+}
projects / summerhack / blobdiff