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+/* $Xorg: RdBitF.c,v 1.5 2001/02/09 02:03:35 xorgcvs Exp $ */
+/*
+
+Copyright 1987, 1998 The Open Group
+
+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.
+
+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 OPEN GROUP 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.
+
+Except as contained in this notice, the name of The Open Group shall
+not be used in advertising or otherwise to promote the sale, use or
+other dealings in this Software without prior written authorization
+from The Open Group.
+
+*/
+/* $XFree86: xc/lib/X11/RdBitF.c,v 3.6 2003/04/13 19:22:17 dawes Exp $ */
+
+/*
+ * Code to read bitmaps from disk files. Interprets
+ * data from X10 and X11 bitmap files and creates
+ * Pixmap representations of files. Returns Pixmap
+ * ID and specifics about image.
+ *
+ * Modified for speedup by Jim Becker, changed image
+ * data parsing logic (removed some fscanf()s).
+ * Aug 5, 1988
+ *
+ * Note that this file and ../Xmu/RdBitF.c look very similar.... Keep them
+ * that way (but don't use common source code so that people can have one
+ * without the other).
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "Xlibint.h"
+#include <X11/Xos.h>
+#include "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(void)
+{
+ /*
+ * 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 int
+NextInt (
+ 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;
+}
+
+int
+XReadBitmapFileData (
+ _Xconst char *filename,
+ unsigned int *width, /* RETURNED */
+ unsigned int *height, /* RETURNED */
+ unsigned char **data, /* RETURNED */
+ int *x_hot, /* RETURNED */
+ int *y_hot) /* RETURNED */
+{
+ FILE *fstream; /* handle on file */
+ unsigned char *bits = 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 */
+
+ /* first time initialization */
+ if (initialized == False) initHexTable();
+
+#ifdef __UNIXOS2__
+ filename = __XOS2RedirRoot(filename);
+#endif
+ if (!(fstream = fopen(filename, "r")))
+ return BitmapOpenFailed;
+
+ /* error cleanup and return macro */
+#define RETURN(code) \
+{ if (bits) Xfree ((char *)bits); fclose (fstream); 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 = strrchr(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 = strrchr(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;
+ bits = (unsigned char *) Xmalloc ((unsigned int) size);
+ if (!bits)
+ RETURN (BitmapNoMemory);
+
+ if (version10p) {
+ unsigned char *ptr;
+ int bytes;
+
+ for (bytes=0, ptr=bits; 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=bits; bytes<size; bytes++, ptr++) {
+ if ((value = NextInt(fstream)) < 0)
+ RETURN (BitmapFileInvalid);
+ *ptr=value;
+ }
+ }
+ } /* end while */
+
+ fclose(fstream);
+ if (!bits)
+ return (BitmapFileInvalid);
+
+ *data = bits;
+ *width = ww;
+ *height = hh;
+ if (x_hot) *x_hot = hx;
+ if (y_hot) *y_hot = hy;
+
+ return (BitmapSuccess);
+}
+
+int
+XReadBitmapFile (
+ Display *display,
+ Drawable d,
+ _Xconst char *filename,
+ unsigned int *width, /* RETURNED */
+ unsigned int *height, /* RETURNED */
+ Pixmap *pixmap, /* RETURNED */
+ int *x_hot, /* RETURNED */
+ int *y_hot) /* RETURNED */
+{
+ unsigned char *data;
+ int res;
+
+ res = XReadBitmapFileData(filename, width, height, &data, x_hot, y_hot);
+ if (res != BitmapSuccess)
+ return res;
+ *pixmap = XCreateBitmapFromData(display, d, (char *)data, *width, *height);
+ Xfree((char *)data);
+ if (*pixmap == None)
+ return (BitmapNoMemory);
+ return (BitmapSuccess);
+}
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