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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /scripts/conmakehash.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'scripts/conmakehash.c')
-rw-r--r--scripts/conmakehash.c293
1 files changed, 293 insertions, 0 deletions
diff --git a/scripts/conmakehash.c b/scripts/conmakehash.c
new file mode 100644
index 000000000000..93dd23f21ec9
--- /dev/null
+++ b/scripts/conmakehash.c
@@ -0,0 +1,293 @@
+/*
+ * conmakehash.c
+ *
+ * Create arrays for initializing the kernel folded tables (using a hash
+ * table turned out to be to limiting...) Unfortunately we can't simply
+ * preinitialize the tables at compile time since kfree() cannot accept
+ * memory not allocated by kmalloc(), and doing our own memory management
+ * just for this seems like massive overkill.
+ *
+ * Copyright (C) 1995-1997 H. Peter Anvin
+ *
+ * This program is a part of the Linux kernel, and may be freely
+ * copied under the terms of the GNU General Public License (GPL),
+ * version 2, or at your option any later version.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sysexits.h>
+#include <string.h>
+#include <ctype.h>
+
+#define MAX_FONTLEN 256
+
+typedef unsigned short unicode;
+
+void usage(char *argv0)
+{
+ fprintf(stderr, "Usage: \n"
+ " %s chartable [hashsize] [hashstep] [maxhashlevel]\n", argv0);
+ exit(EX_USAGE);
+}
+
+int getunicode(char **p0)
+{
+ unsigned char *p = *p0;
+
+ while (*p == ' ' || *p == '\t')
+ p++;
+ if (*p != 'U' || p[1] != '+' ||
+ !isxdigit(p[2]) || !isxdigit(p[3]) || !isxdigit(p[4]) ||
+ !isxdigit(p[5]) || isxdigit(p[6]))
+ return -1;
+ *p0 = p+6;
+ return strtol(p+2,0,16);
+}
+
+unicode unitable[MAX_FONTLEN][255];
+ /* Massive overkill, but who cares? */
+int unicount[MAX_FONTLEN];
+
+void addpair(int fp, int un)
+{
+ int i;
+
+ if ( un <= 0xfffe )
+ {
+ /* Check it isn't a duplicate */
+
+ for ( i = 0 ; i < unicount[fp] ; i++ )
+ if ( unitable[fp][i] == un )
+ return;
+
+ /* Add to list */
+
+ if ( unicount[fp] > 254 )
+ {
+ fprintf(stderr, "ERROR: Only 255 unicodes/glyph permitted!\n");
+ exit(EX_DATAERR);
+ }
+
+ unitable[fp][unicount[fp]] = un;
+ unicount[fp]++;
+ }
+
+ /* otherwise: ignore */
+}
+
+int main(int argc, char *argv[])
+{
+ FILE *ctbl;
+ char *tblname;
+ char buffer[65536];
+ int fontlen;
+ int i, nuni, nent;
+ int fp0, fp1, un0, un1;
+ char *p, *p1;
+
+ if ( argc < 2 || argc > 5 )
+ usage(argv[0]);
+
+ if ( !strcmp(argv[1],"-") )
+ {
+ ctbl = stdin;
+ tblname = "stdin";
+ }
+ else
+ {
+ ctbl = fopen(tblname = argv[1], "r");
+ if ( !ctbl )
+ {
+ perror(tblname);
+ exit(EX_NOINPUT);
+ }
+ }
+
+ /* For now we assume the default font is always 256 characters. */
+ fontlen = 256;
+
+ /* Initialize table */
+
+ for ( i = 0 ; i < fontlen ; i++ )
+ unicount[i] = 0;
+
+ /* Now we come to the tricky part. Parse the input table. */
+
+ while ( fgets(buffer, sizeof(buffer), ctbl) != NULL )
+ {
+ if ( (p = strchr(buffer, '\n')) != NULL )
+ *p = '\0';
+ else
+ fprintf(stderr, "%s: Warning: line too long\n", tblname);
+
+ p = buffer;
+
+/*
+ * Syntax accepted:
+ * <fontpos> <unicode> <unicode> ...
+ * <range> idem
+ * <range> <unicode range>
+ *
+ * where <range> ::= <fontpos>-<fontpos>
+ * and <unicode> ::= U+<h><h><h><h>
+ * and <h> ::= <hexadecimal digit>
+ */
+
+ while (*p == ' ' || *p == '\t')
+ p++;
+ if (!*p || *p == '#')
+ continue; /* skip comment or blank line */
+
+ fp0 = strtol(p, &p1, 0);
+ if (p1 == p)
+ {
+ fprintf(stderr, "Bad input line: %s\n", buffer);
+ exit(EX_DATAERR);
+ }
+ p = p1;
+
+ while (*p == ' ' || *p == '\t')
+ p++;
+ if (*p == '-')
+ {
+ p++;
+ fp1 = strtol(p, &p1, 0);
+ if (p1 == p)
+ {
+ fprintf(stderr, "Bad input line: %s\n", buffer);
+ exit(EX_DATAERR);
+ }
+ p = p1;
+ }
+ else
+ fp1 = 0;
+
+ if ( fp0 < 0 || fp0 >= fontlen )
+ {
+ fprintf(stderr,
+ "%s: Glyph number (0x%x) larger than font length\n",
+ tblname, fp0);
+ exit(EX_DATAERR);
+ }
+ if ( fp1 && (fp1 < fp0 || fp1 >= fontlen) )
+ {
+ fprintf(stderr,
+ "%s: Bad end of range (0x%x)\n",
+ tblname, fp1);
+ exit(EX_DATAERR);
+ }
+
+ if (fp1)
+ {
+ /* we have a range; expect the word "idem" or a Unicode range of the
+ same length */
+ while (*p == ' ' || *p == '\t')
+ p++;
+ if (!strncmp(p, "idem", 4))
+ {
+ for (i=fp0; i<=fp1; i++)
+ addpair(i,i);
+ p += 4;
+ }
+ else
+ {
+ un0 = getunicode(&p);
+ while (*p == ' ' || *p == '\t')
+ p++;
+ if (*p != '-')
+ {
+ fprintf(stderr,
+"%s: Corresponding to a range of font positions, there should be a Unicode range\n",
+ tblname);
+ exit(EX_DATAERR);
+ }
+ p++;
+ un1 = getunicode(&p);
+ if (un0 < 0 || un1 < 0)
+ {
+ fprintf(stderr,
+"%s: Bad Unicode range corresponding to font position range 0x%x-0x%x\n",
+ tblname, fp0, fp1);
+ exit(EX_DATAERR);
+ }
+ if (un1 - un0 != fp1 - fp0)
+ {
+ fprintf(stderr,
+"%s: Unicode range U+%x-U+%x not of the same length as font position range 0x%x-0x%x\n",
+ tblname, un0, un1, fp0, fp1);
+ exit(EX_DATAERR);
+ }
+ for(i=fp0; i<=fp1; i++)
+ addpair(i,un0-fp0+i);
+ }
+ }
+ else
+ {
+ /* no range; expect a list of unicode values for a single font position */
+
+ while ( (un0 = getunicode(&p)) >= 0 )
+ addpair(fp0, un0);
+ }
+ while (*p == ' ' || *p == '\t')
+ p++;
+ if (*p && *p != '#')
+ fprintf(stderr, "%s: trailing junk (%s) ignored\n", tblname, p);
+ }
+
+ /* Okay, we hit EOF, now output hash table */
+
+ fclose(ctbl);
+
+
+ /* Compute total size of Unicode list */
+ nuni = 0;
+ for ( i = 0 ; i < fontlen ; i++ )
+ nuni += unicount[i];
+
+ printf("\
+/*\n\
+ * Do not edit this file; it was automatically generated by\n\
+ *\n\
+ * conmakehash %s > [this file]\n\
+ *\n\
+ */\n\
+\n\
+#include <linux/types.h>\n\
+\n\
+u8 dfont_unicount[%d] = \n\
+{\n\t", argv[1], fontlen);
+
+ for ( i = 0 ; i < fontlen ; i++ )
+ {
+ printf("%3d", unicount[i]);
+ if ( i == fontlen-1 )
+ printf("\n};\n");
+ else if ( i % 8 == 7 )
+ printf(",\n\t");
+ else
+ printf(", ");
+ }
+
+ printf("\nu16 dfont_unitable[%d] = \n{\n\t", nuni);
+
+ fp0 = 0;
+ nent = 0;
+ for ( i = 0 ; i < nuni ; i++ )
+ {
+ while ( nent >= unicount[fp0] )
+ {
+ fp0++;
+ nent = 0;
+ }
+ printf("0x%04x", unitable[fp0][nent++]);
+ if ( i == nuni-1 )
+ printf("\n};\n");
+ else if ( i % 8 == 7 )
+ printf(",\n\t");
+ else
+ printf(", ");
+ }
+
+ exit(EX_OK);
+}

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