-/*
- * Copyright (c) 2001-2002, David Janssens
- * Copyright (c) 2003, Yannick Verschueren
- * Copyright (c) 2003, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- ***/
-
-#include "bio.h"
-#include <stdio.h>
-#include <setjmp.h>
-
-static unsigned char *bio_start; /* pointer to the start of the buffer */
-static unsigned char *bio_end; /* pointer to the end of the buffer */
-static unsigned char *bio_bp; /* pointer to the present position in the buffer */
-static unsigned int bio_buf; /* temporary place where each byte is read or written */
-static int bio_ct; /* coder : number of bits free to write // decoder : number of bits read */
-
-extern jmp_buf j2k_error;
-
-/*
- * Number of bytes written.
- */
-int bio_numbytes()
-{
- return bio_bp - bio_start;
-}
-
-/*
- * Init encoder.
- *
- * bp : Output buffer
- * len : Output buffer length
- */
-void bio_init_enc(unsigned char *bp, int len)
-{
- bio_start = bp;
- bio_end = bp + len;
- bio_bp = bp;
- bio_buf = 0;
- bio_ct = 8;
-}
-
-/*
- * Init decoder.
- *
- * bp : Input buffer
- * len : Input buffer length
- */
-void bio_init_dec(unsigned char *bp, int len)
-{
- bio_start = bp;
- bio_end = bp + len;
- bio_bp = bp;
- bio_buf = 0;
- bio_ct = 0;
-}
-
-/*
- * Write byte. --> function modified to eliminate longjmp !!!
- *
- */
-int bio_byteout()
-{
- bio_buf = (bio_buf << 8) & 0xffff;
- bio_ct = bio_buf == 0xff00 ? 7 : 8;
- if (bio_bp >= bio_end)
- return 1;
- *bio_bp++ = bio_buf >> 8;
- return 0;
-}
-
-/*
- * Read byte. --> function modified to eliminate longjmp !!
- *
- */
-int bio_bytein()
-{
- bio_buf = (bio_buf << 8) & 0xffff;
- bio_ct = bio_buf == 0xff00 ? 7 : 8;
- if (bio_bp >= bio_end)
- return 1;
- bio_buf |= *bio_bp++;
- return 0;
-}
-
-/*
- * Write bit.
- *
- * b : Bit to write (0 or 1)
- */
-void bio_putbit(int b)
-{
- if (bio_ct == 0) {
- bio_byteout();
- }
- bio_ct--;
- bio_buf |= b << bio_ct;
-}
-
-/*
- * Read bit.
- *
- */
-int bio_getbit()
-{
- if (bio_ct == 0) {
- bio_bytein();
- }
- bio_ct--;
- return (bio_buf >> bio_ct) & 1;
-}
-
-/*
- * Write bits.
- *
- * v : Value of bits
- * n : Number of bits to write
- */
-void bio_write(int v, int n)
-{
- int i;
- for (i = n - 1; i >= 0; i--) {
- bio_putbit((v >> i) & 1);
- }
-}
-
-/*
- * Read bits.
- *
- * n : Number of bits to read
- */
-int bio_read(int n)
-{
- int i, v;
- v = 0;
- for (i = n - 1; i >= 0; i--) {
- v += bio_getbit() << i;
- }
- return v;
-}
-
-/*
- * Flush bits. Modified to eliminate longjmp !!
- *
- */
-int bio_flush()
-{
- bio_ct = 0;
- if (bio_byteout())
- return 1;
- if (bio_ct == 7) {
- bio_ct = 0;
-
- if (bio_byteout())
- return 1;
- }
- return 0;
-}
-
-/*
- * Passes the ending bits (coming from flushing)
- */
-int bio_inalign()
-{
- bio_ct = 0;
- if ((bio_buf & 0xff) == 0xff) {
- if (bio_bytein())
- return 1;
- bio_ct = 0;
- }
- return 0;
-}
+/*\r
+ * Copyright (c) 2001-2003, David Janssens\r
+ * Copyright (c) 2002-2003, Yannick Verschueren\r
+ * Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe\r
+ * Copyright (c) 2005, Hervé Drolon, FreeImage Team\r
+ * Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium\r
+ * All rights reserved.\r
+ *\r
+ * Redistribution and use in source and binary forms, with or without\r
+ * modification, are permitted provided that the following conditions\r
+ * are met:\r
+ * 1. Redistributions of source code must retain the above copyright\r
+ * notice, this list of conditions and the following disclaimer.\r
+ * 2. Redistributions in binary form must reproduce the above copyright\r
+ * notice, this list of conditions and the following disclaimer in the\r
+ * documentation and/or other materials provided with the distribution.\r
+ *\r
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'\r
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE\r
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\r
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\r
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS\r
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\r
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)\r
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE\r
+ * POSSIBILITY OF SUCH DAMAGE.\r
+ */\r
+\r
+#include "opj_includes.h"\r
+\r
+/** @defgroup BIO BIO - Individual bit input-output stream */\r
+/*@{*/\r
+\r
+/** @name Local static functions */\r
+/*@{*/\r
+\r
+/**\r
+Write a bit\r
+@param bio BIO handle\r
+@param b Bit to write (0 or 1)\r
+*/\r
+static void bio_putbit(opj_bio_t *bio, int b);\r
+/**\r
+Read a bit\r
+@param bio BIO handle\r
+@return Returns the read bit\r
+*/\r
+static int bio_getbit(opj_bio_t *bio);\r
+/**\r
+Write a byte\r
+@param bio BIO handle\r
+@return Returns 0 if successful, returns 1 otherwise\r
+*/\r
+static int bio_byteout(opj_bio_t *bio);\r
+/**\r
+Read a byte\r
+@param bio BIO handle\r
+@return Returns 0 if successful, returns 1 otherwise\r
+*/\r
+static int bio_bytein(opj_bio_t *bio);\r
+\r
+/*@}*/\r
+\r
+/*@}*/\r
+\r
+/* \r
+==========================================================\r
+ local functions\r
+==========================================================\r
+*/\r
+\r
+static int bio_byteout(opj_bio_t *bio) {\r
+ bio->buf = (bio->buf << 8) & 0xffff;\r
+ bio->ct = bio->buf == 0xff00 ? 7 : 8;\r
+ if (bio->bp >= bio->end) {\r
+ return 1;\r
+ }\r
+ *bio->bp++ = bio->buf >> 8;\r
+ return 0;\r
+}\r
+\r
+static int bio_bytein(opj_bio_t *bio) {\r
+ bio->buf = (bio->buf << 8) & 0xffff;\r
+ bio->ct = bio->buf == 0xff00 ? 7 : 8;\r
+ if (bio->bp >= bio->end) {\r
+ return 1;\r
+ }\r
+ bio->buf |= *bio->bp++;\r
+ return 0;\r
+}\r
+\r
+static void bio_putbit(opj_bio_t *bio, int b) {\r
+ if (bio->ct == 0) {\r
+ bio_byteout(bio);\r
+ }\r
+ bio->ct--;\r
+ bio->buf |= b << bio->ct;\r
+}\r
+\r
+static int bio_getbit(opj_bio_t *bio) {\r
+ if (bio->ct == 0) {\r
+ bio_bytein(bio);\r
+ }\r
+ bio->ct--;\r
+ return (bio->buf >> bio->ct) & 1;\r
+}\r
+\r
+/* \r
+==========================================================\r
+ Bit Input/Output interface\r
+==========================================================\r
+*/\r
+\r
+opj_bio_t* bio_create() {\r
+ opj_bio_t *bio = (opj_bio_t*)opj_malloc(sizeof(opj_bio_t));\r
+ return bio;\r
+}\r
+\r
+void bio_destroy(opj_bio_t *bio) {\r
+ if(bio) {\r
+ opj_free(bio);\r
+ }\r
+}\r
+\r
+int bio_numbytes(opj_bio_t *bio) {\r
+ return (bio->bp - bio->start);\r
+}\r
+\r
+void bio_init_enc(opj_bio_t *bio, unsigned char *bp, int len) {\r
+ bio->start = bp;\r
+ bio->end = bp + len;\r
+ bio->bp = bp;\r
+ bio->buf = 0;\r
+ bio->ct = 8;\r
+}\r
+\r
+void bio_init_dec(opj_bio_t *bio, unsigned char *bp, int len) {\r
+ bio->start = bp;\r
+ bio->end = bp + len;\r
+ bio->bp = bp;\r
+ bio->buf = 0;\r
+ bio->ct = 0;\r
+}\r
+\r
+void bio_write(opj_bio_t *bio, int v, int n) {\r
+ int i;\r
+ for (i = n - 1; i >= 0; i--) {\r
+ bio_putbit(bio, (v >> i) & 1);\r
+ }\r
+}\r
+\r
+int bio_read(opj_bio_t *bio, int n) {\r
+ int i, v;\r
+ v = 0;\r
+ for (i = n - 1; i >= 0; i--) {\r
+ v += bio_getbit(bio) << i;\r
+ }\r
+ return v;\r
+}\r
+\r
+int bio_flush(opj_bio_t *bio) {\r
+ bio->ct = 0;\r
+ if (bio_byteout(bio)) {\r
+ return 1;\r
+ }\r
+ if (bio->ct == 7) {\r
+ bio->ct = 0;\r
+ if (bio_byteout(bio)) {\r
+ return 1;\r
+ }\r
+ }\r
+ return 0;\r
+}\r
+\r
+int bio_inalign(opj_bio_t *bio) {\r
+ bio->ct = 0;\r
+ if ((bio->buf & 0xff) == 0xff) {\r
+ if (bio_bytein(bio)) {\r
+ return 1;\r
+ }\r
+ bio->ct = 0;\r
+ }\r
+ return 0;\r
+}\r
git://git.creatis.insa-lyon.fr / gdcm.git / blobdiff