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authoranderson <anderson>2005-02-12 14:37:13 +0000
committeranderson <anderson>2005-02-12 14:37:13 +0000
commit3f33351e8c679b4ba0ccac3620a2d4948885c2f8 (patch)
treef270939b0f360ef3eac99d0bc72b8bf7dff001af /xts5/src/libXtmu/RdBitF.c
Initial revision
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diff --git a/xts5/src/libXtmu/RdBitF.c b/xts5/src/libXtmu/RdBitF.c
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+/*
+Copyright (c) 2005 X.Org Foundation LLC
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+/*
+* $Header: /cvs/xtest/xtest/xts5/src/libXtmu/RdBitF.c,v 1.1 2005-02-12 14:37:15 anderson Exp $
+*
+* Copyright (c) Applied Testing and Technology, Inc. 1993, 1994, 1995
+* All Rights Reserved.
+*
+* Project: VSW5
+*
+* File: vsw5/src/lib/libXtaw/RdBitF.c
+*
+* Description:
+* Subset of libXmu need for VSW5. Use if implementation does not
+* support Athena.
+*
+* Modifications:
+* $Log: RdBitF.c,v $
+* Revision 1.1 2005-02-12 14:37:15 anderson
+* Initial revision
+*
+* Revision 8.0 1998/12/23 23:26:03 mar
+* Branch point for Release 5.0.2
+*
+* Revision 7.0 1998/10/30 22:44:19 mar
+* Branch point for Release 5.0.2b1
+*
+* Revision 6.0 1998/03/02 05:18:21 tbr
+* Branch point for Release 5.0.1
+*
+* Revision 5.0 1998/01/26 03:14:53 tbr
+* Branch point for Release 5.0.1b1
+*
+* Revision 4.0 1995/12/15 08:46:30 tbr
+* Branch point for Release 5.0.0
+*
+* Revision 3.1 1995/12/15 00:44:40 andy
+* Prepare for GA Release
+*
+*/
+/*
+ * Copyright 1988 Massachusetts Institute of Technology
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of M.I.T. not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission. M.I.T. makes no representations about the
+ * suitability of this software for any purpose. It is provided "as is"
+ * without express or implied warranty.
+ *
+ * M.I.T. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL M.I.T.
+ * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ *
+ * This file contains miscellaneous utility routines and is not part of the
+ * Xlib standard.
+ *
+ * Public entry points:
+ *
+ * XmuReadBitmapData read data from FILE descriptor
+ * XmuReadBitmapDataFromFile read X10 or X11 format bitmap files
+ * and return data
+ *
+ * Note that this file and ../X/XRdBitF.c look very similar.... Keep them
+ * that way (but don't use common source code so that people can have one
+ * without the other).
+ */
+
+
+/*
+ * Based on an optimized version provided by Jim Becker, Auguest 5, 1988.
+ */
+
+#include <X11/Xos.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <stdio.h>
+#include <ctype.h>
+
+
+#define MAX_SIZE 255
+
+/* shared data for the image read/parse logic */
+static short hexTable[256]; /* conversion value */
+static Bool initialized = False; /* easier to fill in at run time */
+
+
+/*
+ * Table index for the hex values. Initialized once, first time.
+ * Used for translation value or delimiter significance lookup.
+ */
+static void initHexTable()
+{
+ /*
+ * We build the table at run time for several reasons:
+ *
+ * 1. portable to non-ASCII machines.
+ * 2. still reentrant since we set the init flag after setting table.
+ * 3. easier to extend.
+ * 4. less prone to bugs.
+ */
+ hexTable['0'] = 0; hexTable['1'] = 1;
+ hexTable['2'] = 2; hexTable['3'] = 3;
+ hexTable['4'] = 4; hexTable['5'] = 5;
+ hexTable['6'] = 6; hexTable['7'] = 7;
+ hexTable['8'] = 8; hexTable['9'] = 9;
+ hexTable['A'] = 10; hexTable['B'] = 11;
+ hexTable['C'] = 12; hexTable['D'] = 13;
+ hexTable['E'] = 14; hexTable['F'] = 15;
+ hexTable['a'] = 10; hexTable['b'] = 11;
+ hexTable['c'] = 12; hexTable['d'] = 13;
+ hexTable['e'] = 14; hexTable['f'] = 15;
+
+ /* delimiters of significance are flagged w/ negative value */
+ hexTable[' '] = -1; hexTable[','] = -1;
+ hexTable['}'] = -1; hexTable['\n'] = -1;
+ hexTable['\t'] = -1;
+
+ initialized = True;
+}
+
+/*
+ * read next hex value in the input stream, return -1 if EOF
+ */
+static NextInt (fstream)
+ FILE *fstream;
+{
+ int ch;
+ int value = 0;
+ int gotone = 0;
+ int done = 0;
+
+ /* loop, accumulate hex value until find delimiter */
+ /* skip any initial delimiters found in read stream */
+
+ while (!done) {
+ ch = getc(fstream);
+ if (ch == EOF) {
+ value = -1;
+ done++;
+ } else {
+ /* trim high bits, check type and accumulate */
+ ch &= 0xff;
+ if (isascii(ch) && isxdigit(ch)) {
+ value = (value << 4) + hexTable[ch];
+ gotone++;
+ } else if ((hexTable[ch]) < 0 && gotone)
+ done++;
+ }
+ }
+ return value;
+}
+
+
+/*
+ * The data returned by the following routine is always in left-most byte
+ * first and left-most bit first. If it doesn't return BitmapSuccess then
+ * its arguments won't have been touched. This routine should look as much
+ * like the Xlib routine XReadBitmapfile as possible.
+ */
+int XmuReadBitmapData (fstream, width, height, datap, x_hot, y_hot)
+ FILE *fstream; /* handle on file */
+ unsigned int *width, *height; /* RETURNED */
+ unsigned char **datap; /* RETURNED */
+ int *x_hot, *y_hot; /* RETURNED */
+{
+ unsigned char *data = NULL; /* working variable */
+ char line[MAX_SIZE]; /* input line from file */
+ int size; /* number of bytes of data */
+ char name_and_type[MAX_SIZE]; /* an input line */
+ char *type; /* for parsing */
+ int value; /* from an input line */
+ int version10p; /* boolean, old format */
+ int padding; /* to handle alignment */
+ int bytes_per_line; /* per scanline of data */
+ unsigned int ww = 0; /* width */
+ unsigned int hh = 0; /* height */
+ int hx = -1; /* x hotspot */
+ int hy = -1; /* y hotspot */
+
+#define Xmalloc(size) malloc(size)
+
+ /* first time initialization */
+ if (initialized == False) initHexTable();
+
+ /* error cleanup and return macro */
+#define RETURN(code) { if (data) free (data); return code; }
+
+ while (fgets(line, MAX_SIZE, fstream)) {
+ if (strlen(line) == MAX_SIZE-1) {
+ RETURN (BitmapFileInvalid);
+ }
+ if (sscanf(line,"#define %s %d",name_and_type,&value) == 2) {
+ if (!(type = rindex(name_and_type, '_')))
+ type = name_and_type;
+ else
+ type++;
+
+ if (!strcmp("width", type))
+ ww = (unsigned int) value;
+ if (!strcmp("height", type))
+ hh = (unsigned int) value;
+ if (!strcmp("hot", type)) {
+ if (type-- == name_and_type || type-- == name_and_type)
+ continue;
+ if (!strcmp("x_hot", type))
+ hx = value;
+ if (!strcmp("y_hot", type))
+ hy = value;
+ }
+ continue;
+ }
+
+ if (sscanf(line, "static short %s = {", name_and_type) == 1)
+ version10p = 1;
+ else if (sscanf(line,"static unsigned char %s = {",name_and_type) == 1)
+ version10p = 0;
+ else if (sscanf(line, "static char %s = {", name_and_type) == 1)
+ version10p = 0;
+ else
+ continue;
+
+ if (!(type = rindex(name_and_type, '_')))
+ type = name_and_type;
+ else
+ type++;
+
+ if (strcmp("bits[]", type))
+ continue;
+
+ if (!ww || !hh)
+ RETURN (BitmapFileInvalid);
+
+ if ((ww % 16) && ((ww % 16) < 9) && version10p)
+ padding = 1;
+ else
+ padding = 0;
+
+ bytes_per_line = (ww+7)/8 + padding;
+
+ size = bytes_per_line * hh;
+ data = (unsigned char *) Xmalloc ((unsigned int) size);
+ if (!data)
+ RETURN (BitmapNoMemory);
+
+ if (version10p) {
+ unsigned char *ptr;
+ int bytes;
+
+ for (bytes=0, ptr=data; bytes<size; (bytes += 2)) {
+ if ((value = NextInt(fstream)) < 0)
+ RETURN (BitmapFileInvalid);
+ *(ptr++) = value;
+ if (!padding || ((bytes+2) % bytes_per_line))
+ *(ptr++) = value >> 8;
+ }
+ } else {
+ unsigned char *ptr;
+ int bytes;
+
+ for (bytes=0, ptr=data; bytes<size; bytes++, ptr++) {
+ if ((value = NextInt(fstream)) < 0)
+ RETURN (BitmapFileInvalid);
+ *ptr=value;
+ }
+ }
+ break;
+ } /* end while */
+
+ if (data == NULL) {
+ RETURN (BitmapFileInvalid);
+ }
+
+ *datap = data;
+ data = NULL;
+ *width = ww;
+ *height = hh;
+ if (x_hot) *x_hot = hx;
+ if (y_hot) *y_hot = hy;
+
+ RETURN (BitmapSuccess);
+}
+
+
+#if NeedFunctionPrototypes
+int XmuReadBitmapDataFromFile (_Xconst char *filename, unsigned int *width,
+ unsigned int *height, unsigned char **datap,
+ int *x_hot, int *y_hot)
+#else
+int XmuReadBitmapDataFromFile (filename, width, height, datap, x_hot, y_hot)
+ char *filename;
+ unsigned int *width, *height; /* RETURNED */
+ unsigned char **datap; /* RETURNED */
+ int *x_hot, *y_hot; /* RETURNED */
+#endif
+{
+ FILE *fstream;
+ int status;
+
+ if ((fstream = fopen (filename, "r")) == NULL) {
+ return BitmapOpenFailed;
+ }
+ status = XmuReadBitmapData (fstream, width, height, datap, x_hot, y_hot);
+ fclose (fstream);
+ return status;
+}