tty: vt: move conmakehash to drivers/tty/vt/ from scripts/

scripts/conmakehash is only used for generating
drivers/tty/vt/consolemap_deftbl.c

Move it to the related directory.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Link: https://lore.kernel.org/r/20191217110633.8796-1-masahiroy@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 290 insertions, 0 deletions

diff --git a/drivers/tty/vt/conmakehash.c b/drivers/tty/vt/conmakehash.c
new file mode 100644
index 000000000000..cddd789fe46e
--- /dev/null
+++ b/drivers/tty/vt/conmakehash.c
@@ -0,0 +1,290 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * 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
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sysexits.h>
+#include <string.h>
+#include <ctype.h>
+
+#define MAX_FONTLEN 256
+
+typedef unsigned short unicode;
+
+static void usage(char *argv0)
+{
+  fprintf(stderr, "Usage: \n"
+         "        %s chartable [hashsize] [hashstep] [maxhashlevel]\n", argv0);
+  exit(EX_USAGE);
+}
+
+static int getunicode(char **p0)
+{
+  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];
+
+static 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);
+}