-/*\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
+/*
+ * Copyright (c) 2001-2003, David Janssens
+ * Copyright (c) 2002-2003, Yannick Verschueren
+ * Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe
+ * Copyright (c) 2005, Hervé Drolon, FreeImage Team
+ * Copyright (c) 2002-2005, 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 "opj_includes.h"
+
+/** @defgroup BIO BIO - Individual bit input-output stream */
+/*@{*/
+
+/** @name Local static functions */
+/*@{*/
+
+/**
+Write a bit
+@param bio BIO handle
+@param b Bit to write (0 or 1)
+*/
+static void bio_putbit(opj_bio_t *bio, int b);
+/**
+Read a bit
+@param bio BIO handle
+@return Returns the read bit
+*/
+static int bio_getbit(opj_bio_t *bio);
+/**
+Write a byte
+@param bio BIO handle
+@return Returns 0 if successful, returns 1 otherwise
+*/
+static int bio_byteout(opj_bio_t *bio);
+/**
+Read a byte
+@param bio BIO handle
+@return Returns 0 if successful, returns 1 otherwise
+*/
+static int bio_bytein(opj_bio_t *bio);
+
+/*@}*/
+
+/*@}*/
+
+/*
+==========================================================
+ local functions
+==========================================================
+*/
+
+static int bio_byteout(opj_bio_t *bio) {
+ 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;
+}
+
+static int bio_bytein(opj_bio_t *bio) {
+ 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;
+}
+
+static void bio_putbit(opj_bio_t *bio, int b) {
+ if (bio->ct == 0) {
+ bio_byteout(bio);
+ }
+ bio->ct--;
+ bio->buf |= b << bio->ct;
+}
+
+static int bio_getbit(opj_bio_t *bio) {
+ if (bio->ct == 0) {
+ bio_bytein(bio);
+ }
+ bio->ct--;
+ return (bio->buf >> bio->ct) & 1;
+}
+
+/*
+==========================================================
+ Bit Input/Output interface
+==========================================================
+*/
+
+opj_bio_t* bio_create() {
+ opj_bio_t *bio = (opj_bio_t*)opj_malloc(sizeof(opj_bio_t));
+ return bio;
+}
+
+void bio_destroy(opj_bio_t *bio) {
+ if(bio) {
+ opj_free(bio);
+ }
+}
+
+int bio_numbytes(opj_bio_t *bio) {
+ return (bio->bp - bio->start);
+}
+
+void bio_init_enc(opj_bio_t *bio, unsigned char *bp, int len) {
+ bio->start = bp;
+ bio->end = bp + len;
+ bio->bp = bp;
+ bio->buf = 0;
+ bio->ct = 8;
+}
+
+void bio_init_dec(opj_bio_t *bio, unsigned char *bp, int len) {
+ bio->start = bp;
+ bio->end = bp + len;
+ bio->bp = bp;
+ bio->buf = 0;
+ bio->ct = 0;
+}
+
+void bio_write(opj_bio_t *bio, int v, int n) {
+ int i;
+ for (i = n - 1; i >= 0; i--) {
+ bio_putbit(bio, (v >> i) & 1);
+ }
+}
+
+int bio_read(opj_bio_t *bio, int n) {
+ int i, v;
+ v = 0;
+ for (i = n - 1; i >= 0; i--) {
+ v += bio_getbit(bio) << i;
+ }
+ return v;
+}
+
+int bio_flush(opj_bio_t *bio) {
+ bio->ct = 0;
+ if (bio_byteout(bio)) {
+ return 1;
+ }
+ if (bio->ct == 7) {
+ bio->ct = 0;
+ if (bio_byteout(bio)) {
+ return 1;
+ }
+ }
+ return 0;
+}
+
+int bio_inalign(opj_bio_t *bio) {
+ bio->ct = 0;
+ if ((bio->buf & 0xff) == 0xff) {
+ if (bio_bytein(bio)) {
+ return 1;
+ }
+ bio->ct = 0;
+ }
+ return 0;
+}
git://git.creatis.insa-lyon.fr / gdcm.git / blobdiff