move cfsml.pl to the tools/ directory

svn-id: r38486

1 files changed, 1183 insertions, 0 deletions

diff --git a/tools/cfsml.pl b/tools/cfsml.pl
new file mode 100644
index 0000000000..982a536b70
--- /dev/null
+++ b/tools/cfsml.pl
@@ -0,0 +1,1183 @@
+#! /usr/bin/env perl
+# The C File Storage Meta Language "reference" implementation
+# This implementation is supposed to conform to version
+$version = "0.8.2";
+# of the spec. Please contact the maintainer if it doesn't.
+#
+# cfsml.pl Copyright (C) 1999, 2000, 2001 Christoph Reichenbach
+#
+#
+# This program may be modified and copied freely according to the terms of
+# the GNU general public license (GPL), as long as the above copyright
+# notice and the licensing information contained herein are preserved.
+#
+# Please refer to www.gnu.org for licensing details.
+#
+# This work is provided AS IS, without warranty of any kind, expressed or
+# implied, including but not limited to the warranties of merchantibility,
+# noninfringement, and fitness for a specific purpose. The author will not
+# be held liable for any damage caused by this work or derivatives of it.
+#
+# By using this source code, you agree to the licensing terms as stated
+# above.
+#
+#
+# Please contact the maintainer for bug reports or inquiries.
+#
+# Current Maintainer:
+#
+#    Christoph Reichenbach (CJR) [jameson@linuxgames.com]
+#
+#
+# Warning: This is still a "bit" messy. Sorry for that.
+#
+
+#$debug = 1;
+
+$write_lines = "true";
+$source_file = "CFSML source file";
+$type_integer = "integer";
+$type_string = "string";
+$type_record = "RECORD";
+$type_pointer = "POINTER";
+$type_abspointer = "ABSPOINTER";
+
+%types;      # Contains all type bindings
+%records;    # Contains all record bindings
+
+$mode = undef;
+while ($op = shift @ARGV) {
+    if ($mode eq undef) {
+	if ($op eq "-f") {
+	    $mode = "fname";
+	} elsif ($op eq "-l") {
+	    $write_lines = undef;
+	} elsif ($op eq "-v") {
+	    print "cfsml.pl, the CFSML code generator, version $version\n";
+	    print "This program is provided WITHOUT WARRANTY of any kind. It may be\n";
+	    print "copied and modified freely according to the terms of the GNU\n";
+	    print "General Public License.\n";
+	    exit(0);
+	} elsif ($op eq "-h") {
+	    print "CFSML help:\n";
+	    print "Usage: cat source | cfsml.pl [-v] [-h] [-l] [-f <filename>] > dest\n";
+	    print "  -h : help\n";
+	    print "  -v : print version\n";
+	    print "  -l : disable line number printing in dest file\n";
+	    print "  -f : specify file name for line number printing\n";
+	    exit(0);
+	} else {
+	    die "Unknown option '$op'\n";
+	}
+    } elsif ($mode eq "fname") {
+	$source_file = $op;
+	$mode = 0;
+    } else {
+	die "Invalid internal state '$mode'\n";
+    }
+}
+
+sub write_line_pp
+# write_line_pp(int line_nr, bool input_file?)
+{
+    my $line_nr = shift;
+    my $_file = shift;
+    my $filename = "cfsml.pl";
+
+    if (_file) {
+	$filename = $source_file;
+    }
+
+    if ($write_lines) {
+	print "#line $line_nr \"$filename\"\n";
+    }
+}
+
+sub create_string_functions
+  {
+    $firstline = __LINE__;
+    $firstline += 4;
+    write_line_pp($firstline, 0);
+    print <<'EOF';
+
+#include <stdarg.h> /* We need va_lists */
+#include "sci/include/sci_memory.h"
+
+#ifdef CFSML_DEBUG_MALLOC
+/*
+#define free(p)        dbg_sci_free(p)
+#define malloc(s)      dbg_sci_malloc(s)
+#define calloc(n, s)   dbg_sci_calloc(n, s)
+#define realloc(p, s)  dbg_sci_realloc(p, s)
+*/
+#define free        dbg_sci_free
+#define malloc      dbg_sci_malloc
+#define calloc      dbg_sci_calloc
+#define realloc     dbg_sci_realloc
+#endif
+
+static void
+_cfsml_error(const char *fmt, ...)
+{
+  va_list argp;
+
+  fprintf(stderr, "Error: ");
+  va_start(argp, fmt);
+  vfprintf(stderr, fmt, argp);
+  va_end(argp);
+
+}
+
+
+static struct _cfsml_pointer_refstruct {
+    struct _cfsml_pointer_refstruct *next;
+    void *ptr;
+} *_cfsml_pointer_references = NULL;
+
+static struct _cfsml_pointer_refstruct **_cfsml_pointer_references_current = &_cfsml_pointer_references;
+
+static char *_cfsml_last_value_retrieved = NULL;
+static char *_cfsml_last_identifier_retrieved = NULL;
+
+static void
+_cfsml_free_pointer_references_recursively(struct _cfsml_pointer_refstruct *refs, int free_pointers)
+{
+    if (!refs)
+	return;
+    #ifdef CFSML_DEBUG_MALLOC
+    SCI_MEMTEST;
+    #endif
+
+    _cfsml_free_pointer_references_recursively(refs->next, free_pointers);
+    #ifdef CFSML_DEBUG_MALLOC
+    SCI_MEMTEST;
+
+    fprintf(stderr,"Freeing ptrref %p [%p] %s\n", refs->ptr, refs, free_pointers?
+	    "ALL": "cleanup only");
+    #endif
+
+    if (free_pointers)
+	free(refs->ptr);
+
+    #ifdef CFSML_DEBUG_MALLOC
+    SCI_MEMTEST;
+    #endif
+    free(refs);
+    #ifdef CFSML_DEBUG_MALLOC
+    SCI_MEMTEST;
+    #endif
+}
+
+static void
+_cfsml_free_pointer_references(struct _cfsml_pointer_refstruct **meta_ref, int free_pointers)
+{
+    _cfsml_free_pointer_references_recursively(*meta_ref, free_pointers);
+    *meta_ref = NULL;
+    _cfsml_pointer_references_current = meta_ref;
+}
+
+static struct _cfsml_pointer_refstruct **
+_cfsml_get_current_refpointer()
+{
+    return _cfsml_pointer_references_current;
+}
+
+static void _cfsml_register_pointer(void *ptr)
+{
+    struct _cfsml_pointer_refstruct *newref = (struct _cfsml_pointer_refstruct*)sci_malloc(sizeof (struct _cfsml_pointer_refstruct));
+    #ifdef CFSML_DEBUG_MALLOC
+    SCI_MEMTEST;
+    fprintf(stderr,"Registering ptrref %p [%p]\n", ptr, newref);
+    #endif
+    newref->next = *_cfsml_pointer_references_current;
+    newref->ptr = ptr;
+    *_cfsml_pointer_references_current = newref;
+}
+
+
+static char *
+_cfsml_mangle_string(const char *s)
+{
+  const char *source = s;
+  char c;
+  char *target = (char *) sci_malloc(1 + strlen(s) * 2); /* We will probably need less than that */
+  char *writer = target;
+
+  while ((c = *source++)) {
+
+    if (c < 32) { /* Special character? */
+      *writer++ = '\\'; /* Escape... */
+      c += ('a' - 1);
+    } else if (c == '\\' || c == '"')
+      *writer++ = '\\'; /* Escape, but do not change */
+    *writer++ = c;
+
+  }
+  *writer = 0; /* Terminate string */
+
+  return (char *) sci_realloc(target, strlen(target) + 1);
+}
+
+
+static char *
+_cfsml_unmangle_string(const char *s, unsigned int length)
+{
+  char *target = (char *) sci_malloc(1 + strlen(s));
+  char *writer = target;
+  const char *source = s;
+  const char *end = s + length;
+  char c;
+
+  while ((source != end) && (c = *source++) && (c > 31)) {
+    if (c == '\\') { /* Escaped character? */
+      c = *source++;
+      if ((c != '\\') && (c != '"')) /* Un-escape 0-31 only */
+	c -= ('a' - 1);
+    }
+    *writer++ = c;
+  }
+  *writer = 0; /* Terminate string */
+
+  return (char *) sci_realloc(target, strlen(target) + 1);
+}
+
+
+static char *
+_cfsml_get_identifier(FILE *fd, int *line, int *hiteof, int *assignment)
+{
+  int c;
+  int mem = 32;
+  int pos = 0;
+  int done = 0;
+  char *retval = (char *) sci_malloc(mem);
+
+  if (_cfsml_last_identifier_retrieved) {
+      free(_cfsml_last_identifier_retrieved);
+      _cfsml_last_identifier_retrieved = NULL;
+  }
+
+  while (isspace(c = fgetc(fd)) && (c != EOF));
+  if (c == EOF) {
+    _cfsml_error("Unexpected end of file at line %d\n", *line);
+    free(retval);
+    *hiteof = 1;
+    return NULL;
+  }
+
+  ungetc(c, fd);
+
+  while (((c = fgetc(fd)) != EOF) && ((pos == 0) || (c != '\n')) && (c != '=')) {
+
+     if (pos == mem - 1) /* Need more memory? */
+       retval = (char *) sci_realloc(retval, mem *= 2);
+
+     if (!isspace(c)) {
+        if (done) {
+           _cfsml_error("Single word identifier expected at line %d\n", *line);
+           free(retval);
+           return NULL;
+        }
+        retval[pos++] = c;
+     } else
+        if (pos != 0)
+           done = 1; /* Finished the variable name */
+        else if (c == '\n')
+           ++(*line);
+  }
+
+  if (c == EOF) {
+    _cfsml_error("Unexpected end of file at line %d\n", *line);
+    free(retval);
+    *hiteof = 1;
+    return NULL;
+  }
+
+  if (c == '\n') {
+    ++(*line);
+    if (assignment)
+      *assignment = 0;
+  } else
+    if (assignment)
+      *assignment = 1;
+
+  if (pos == 0) {
+    _cfsml_error("Missing identifier in assignment at line %d\n", *line);
+    free(retval);
+    return NULL;
+  }
+
+  if (pos == mem - 1) /* Need more memory? */
+     retval = (char *) sci_realloc(retval, mem += 1);
+
+  retval[pos] = 0; /* Terminate string */
+EOF
+
+if ($debug) {
+    print "  printf(\"identifier is '%s'\\n\", retval);\n";
+}
+
+  $firstline = __LINE__;
+  $firstline += 4;
+  write_line_pp($firstline, 0);
+  print <<'EOF2';
+
+  return _cfsml_last_identifier_retrieved = retval;
+}
+
+
+static char *
+_cfsml_get_value(FILE *fd, int *line, int *hiteof)
+{
+  int c;
+  int mem = 64;
+  int pos = 0;
+  char *retval = (char *) sci_malloc(mem);
+
+  if (_cfsml_last_value_retrieved) {
+      free(_cfsml_last_value_retrieved);
+      _cfsml_last_value_retrieved = NULL;
+  }
+
+  while (((c = fgetc(fd)) != EOF) && (c != '\n')) {
+
+     if (pos == mem - 1) /* Need more memory? */
+       retval = (char *) sci_realloc(retval, mem *= 2);
+
+     if (pos || (!isspace(c)))
+        retval[pos++] = c;
+
+  }
+
+  while ((pos > 0) && (isspace(retval[pos - 1])))
+     --pos; /* Strip trailing whitespace */
+
+  if (c == EOF)
+    *hiteof = 1;
+
+  if (pos == 0) {
+    _cfsml_error("Missing value in assignment at line %d\n", *line);
+    free(retval);
+    return NULL;
+  }
+
+  if (c == '\n')
+     ++(*line);
+
+  if (pos == mem - 1) /* Need more memory? */
+    retval = (char *) sci_realloc(retval, mem += 1);
+
+  retval[pos] = 0; /* Terminate string */
+EOF2
+
+    if ($debug) {
+	print "  printf(\"value is '%s'\\n\", retval);\n";
+    }
+
+    $firstline = __LINE__;
+    $firstline += 4;
+    write_line_pp($firstline, 0);
+  print <<'EOF3';
+  return (_cfsml_last_value_retrieved = (char *) sci_realloc(retval, strlen(retval) + 1));
+  /* Re-allocate; this value might be used for quite some while (if we are
+  ** restoring a string)
+  */
+}
+EOF3
+  }
+
+
+# Call with $expression as a simple expression, like "tos + 1".
+# Returns (in this case) ("tos", "-1").
+sub lvaluize
+  {
+    my @retval;
+#    print "//DEBUG: $expression [";
+    my @tokens = split (/([+-\/\*])/, $expression);
+#    print join(",", @tokens);
+    $retval[0] = $tokens[0];
+
+    my $rightvalue = "";
+    for ($i = 1; $tokens[$i]; $i++) {
+
+      if ($tokens[$i] eq "+") {
+	$rightvalue .= "-";
+      } elsif ($tokens[$i] eq "-") {
+	$rightvalue .= "+";
+      } elsif ($tokens[$i] eq "/") {
+	$rightvalue .= "*";
+      } elsif ($tokens[$i] eq "*") {
+	$rightvalue .= "/";
+      } else {
+	$rightvalue .= $tokens[$i];
+      }
+    }
+
+    $retval[1] = $rightvalue;
+
+#   print "] => ($retval[0];$retval[1])\n";
+
+    return @retval;
+  }
+
+
+
+sub create_declaration
+  {
+    $typename = $type;
+    $ctype = $types{$type}->{'ctype'};
+
+    if (not $types{$type}->{'external'}) {
+      $types{$type}{'writer'} = "_cfsml_write_" . $typename;
+      $types{$type}{'reader'} = "_cfsml_read_" . $typename;
+      write_line_pp(__LINE__, 0);
+      print "static void\n$types{$type}{'writer'}(FILE *fh, $ctype* save_struc);\n";
+      print "static int\n$types{$type}{'reader'}(FILE *fh, $ctype* save_struc, const char *lastval,".
+	" int *line, int *hiteof);\n\n";
+    };
+
+  }
+
+sub create_writer
+  {
+    $typename = $type;
+    $ctype = $types{$type}{'ctype'};
+
+    write_line_pp(__LINE__, 0);
+    print "static void\n_cfsml_write_$typename(FILE *fh, $ctype* save_struc)\n{\n";
+    if ($types{$type}{'type'} eq $type_record) {
+        print "  int min, max, i;\n\n";
+    }
+
+    if ($types{$type}{'type'} eq $type_integer) {
+      print "  fprintf(fh, \"%li\", (long) *save_struc);\n";
+    }
+    elsif ($types{$type}{'type'} eq $type_string) {
+	write_line_pp(__LINE__, 0);
+	print "  if (!(*save_struc))\n";
+	print "    fprintf(fh, \"\\\\null\\\\\");\n";
+	print "  else {\n";
+	print "    char *token = _cfsml_mangle_string((const char *) *save_struc);\n";
+	print "    fprintf(fh, \"\\\"%s\\\"\", token);\n";
+	print "    free(token);\n";
+	print "  }\n";
+    }
+    elsif ($types{$type}{'type'} eq $type_record) {
+	write_line_pp(__LINE__, 0);
+	print "  fprintf(fh, \"{\\n\");\n";
+
+	for $n (@{$records{$type}}) {
+
+	    print "  fprintf(fh, \"$n->{'name'} = \");\n";
+
+	    if ($n->{'array'}) { # Check for arrays
+
+		if ($n->{'array'} eq 'static' or $n->{'size'} * 2) { # fixed integer value?
+		    print "    min = max = $n->{'size'};\n";
+		}
+		else { # No, a variable
+		    print "    min = max = save_struc->$n->{'size'};\n";
+		}
+
+		if ($n->{'maxwrite'}) { # A write limit?
+		    print "    if (save_struc->$n->{'maxwrite'} < min)\n";
+		    print "       min = save_struc->$n->{'maxwrite'};\n";
+		}
+
+		if ($n->{'array'} eq 'dynamic') {
+		    print "    if (!save_struc->$n->{'name'})\n";
+		    print "       min = max = 0; /* Don't write if it points to NULL */\n";
+		}
+
+		write_line_pp(__LINE__, 0);
+		print "    fprintf(fh, \"[%d][\\n\", max);\n";
+		print "    for (i = 0; i < min; i++) {\n";
+		print "      $types{$n->{'type'}}{'writer'}";
+		my $subscribstr = "[i]"; # To avoid perl interpolation problems
+		print "(fh, &(save_struc->$n->{'name'}$subscribstr));\n";
+		print "      fprintf(fh, \"\\n\");\n";
+		print "    }\n";
+		print "    fprintf(fh, \"]\");\n";
+
+	} elsif ($n->{'type'} eq $type_pointer) { # Relative pointer
+
+	  print "    fprintf(fh, \"%d\", save_struc->$n->{'name'} - save_struc->$n->{'anchor'});" .
+	    " /* Relative pointer */\n";
+
+      } elsif ($n->{'type'} eq $type_abspointer) { # Absolute pointer
+
+	  print "    if (!save_struc->$n->{'name'})\n";
+	  print "      fprintf(fh, \"\\\\null\\\\\");\n";
+	  print "    else \n";
+	  print "      $types{$n->{'reftype'}}{'writer'}";
+	  print "(fh, save_struc->$n->{'name'});\n";
+
+	} else { # Normal record entry
+
+	  print "    $types{$n->{'type'}}{'writer'}";
+	  print "(fh, ($types{$n->{'type'}}{'ctype'}*) &(save_struc->$n->{'name'}));\n";
+
+	}
+
+	print "    fprintf(fh, \"\\n\");\n";
+      }
+
+      print "  fprintf(fh, \"}\");\n";
+    }
+    else {
+      print STDERR "Warning: Attempt to create_writer for invalid type '$types{$type}{'type'}'\n";
+    }
+    print "}\n\n";
+
+  }
+
+
+sub create_reader
+  {
+    $typename = $type;
+    $ctype = $types{$type}{'ctype'};
+
+    write_line_pp(__LINE__, 0);
+    print "static int\n_cfsml_read_$typename";
+    print "(FILE *fh, $ctype* save_struc, const char *lastval, int *line, int *hiteof)\n{\n";
+
+    print "  char *token;\n";
+    if ($types{$type}{'type'} eq $type_record) {
+      print "int min, max, i;\n";
+    }
+    my $reladdress_nr = 0; # Number of relative addresses needed
+    my $reladdress = 0; # Current relative address number
+    my $reladdress_resolver = ""; # Relative addresses are resolved after the main while block
+
+    if ($types{$type}{'type'} eq $type_record) {
+
+      foreach $n (@{$records{$type}}) { # Count relative addresses we need
+	if ($n->{'type'} eq $type_pointer) {
+	  ++$reladdress_nr;
+	}
+      }
+
+      if ($reladdress_nr) { # Allocate stack space for all relative addresses needed
+	print "  int reladdresses[$reladdress_nr] = {0};\n";
+      }
+    }
+
+    if ($types{$type}{'type'} eq $type_integer) {
+	write_line_pp(__LINE__, 0);
+	print "\n  *save_struc = strtol(lastval, &token, 0);\n";
+	print "  if ( (*save_struc == 0) && (token == lastval) ) {\n";
+	print "     _cfsml_error(\"strtol failed at line %d\\n\", *line);\n";
+	print "     return CFSML_FAILURE;\n";
+	print "  }\n";
+	print "  if (*token != 0) {\n";
+	print "     _cfsml_error(\"Non-integer encountered while parsing int value at line %d\\n\",";
+	print " *line);\n";
+	print "     return CFSML_FAILURE;\n";
+	print "  }\n";
+	print "  return CFSML_SUCCESS;\n";
+    } elsif ($types{$type}{'type'} eq $type_string) {
+	write_line_pp(__LINE__, 0);
+	print "\n";
+	print "  if (strcmp(lastval, \"\\\\null\\\\\")) { /* null pointer? */\n";
+    print "    unsigned int length = strlen(lastval);\n";
+	print "    if (*lastval == '\"') { /* Quoted string? */\n";
+	print "      while (lastval[length] != '\"')\n";
+	print "        --length;\n\n";
+	print "      if (!length) { /* No matching double-quotes? */\n";
+	print "        _cfsml_error(\"Unbalanced quotes at line %d\\n\", *line);\n";
+	print "        return CFSML_FAILURE;\n";
+	print "      }\n\n";
+	print "      lastval++; /* ...and skip the opening quotes locally */\n";
+	print "      length--;\n";
+	print "    }\n";
+	print "    *save_struc = _cfsml_unmangle_string(lastval, length);\n";
+	print "    _cfsml_register_pointer(*save_struc);\n";
+	print "    return CFSML_SUCCESS;\n";
+	print "  } else {\n";
+	print "    *save_struc = NULL;\n";
+	print "    return CFSML_SUCCESS;\n";
+	print "  }\n";
+    } elsif ($types{$type}{'type'} eq $type_record) {
+	write_line_pp(__LINE__, 0);
+	print "  int assignment, closed, done;\n\n";
+	print "  if (strcmp(lastval, \"{\")) {\n";
+	print "     _cfsml_error(\"Reading record $type; expected opening braces in line %d, got \\\"%s\\\"\\n\",";
+	print "*line, lastval);\n";
+	print "     return CFSML_FAILURE;\n";
+	print "  };\n";
+	print "  closed = 0;\n";
+	print "  do {\n";
+	print "    const char *value;\n";
+	print "    token = _cfsml_get_identifier(fh, line, hiteof, &assignment);\n\n";
+	print "    if (!token) {\n";
+	print "       _cfsml_error(\"Expected token at line %d\\n\", *line);\n";
+	print "       return CFSML_FAILURE;\n";
+	print "    }\n";
+	print "    if (!assignment) {\n";
+	print "      if (!strcmp(token, \"}\")) \n";
+	print "         closed = 1;\n";
+	print "      else {\n";
+	print "        _cfsml_error(\"Expected assignment or closing braces in line %d\\n\", *line);\n";
+	print "        return CFSML_FAILURE;\n";
+	print "      }\n";
+	print "    } else {\n";
+	print "      value = \"\";\n";
+	print "      while (!value || !strcmp(value, \"\"))\n";
+	print "        value = _cfsml_get_value(fh, line, hiteof);\n";
+	print "      if (!value) {\n";
+	print "        _cfsml_error(\"Expected token at line %d\\n\", *line);\n";
+	print "        return CFSML_FAILURE;\n";
+	print "      }\n";
+#	print "    }\n";
+
+
+      foreach $n (@{$records{$type}}) { # Now take care of all record elements
+
+	my $type = $n->{'type'};
+	my $reference = undef;
+	if ($type eq $type_abspointer) {
+	    $reference = 1;
+	    $type = $n->{'reftype'};
+	}
+	my $name = $n->{'name'};
+	my $reader = $types{$type}{'reader'};
+	my $size = $n->{'size'};
+
+	print "      if (!strcmp(token, \"$name\")) {\n";
+
+	if ($type eq $type_pointer) { # A relative pointer
+
+	  $reader = $types{'int'}{'reader'}; # Read relpointer as int
+
+	  write_line_pp(__LINE__, 0);
+	  print "         if ($reader(fh, &(reladdresses[$reladdress]), value, line, hiteof)) {\n";
+	  print "            _cfsml_error(\"Expected token at line %d\\n\", *line);\n";
+	  print "            return CFSML_FAILURE;\n";
+	  print "         }\n";
+
+	  # Make sure that the resulting variable is interpreted correctly
+	  $reladdress_resolver .= "  save_struc->$n->{'name'} =".
+	    " save_struc->$n->{'anchor'} + reladdresses[$reladdress];\n";
+
+	  ++$reladdress; # Prepare reladdress for next element
+
+	} elsif ($n->{'array'}) { # Is it an array?
+	    write_line_pp(__LINE__, 0);
+	    print "         if ((value[0] != '[') || (value[strlen(value) - 1] != '[')) {\n";
+	    # The value must end with [, since we're starting array data, and it must also
+	    # begin with [, since this is either the only character in the line, or it starts
+	    # the "amount of memory to allocate" block
+	    print "            _cfsml_error(\"Opening brackets expected at line %d\\n\", *line);\n";
+	    print "            return CFSML_FAILURE;\n";
+	    print "         }\n";
+
+	  if ($n->{'array'} eq 'dynamic') {
+	      write_line_pp(__LINE__, 0);
+	    # We need to allocate the array first
+	    print "         /* Prepare to restore dynamic array */\n";
+	    # Read amount of memory to allocate
+	    print "         max = strtol(value + 1, NULL, 0);\n";
+	    print "         if (max < 0) {\n";
+	    print "            _cfsml_error(\"Invalid number of elements to allocate for dynamic ";
+	    print "array '%s' at line %d\\n\", token, *line);\n";
+	    print "            return CFSML_FAILURE;\n";
+	    print "         }\n\n";
+
+	    print "         if (max) {\n";
+	    print "           save_struc->$name = ($n->{'type'} *) sci_malloc(max * sizeof($type));\n";
+	    print "#ifdef SATISFY_PURIFY\n";
+            print "           memset(save_struc->$name, 0, max * sizeof($type));\n";
+	    print "#endif\n";
+	    print "           _cfsml_register_pointer(save_struc->$name);\n";
+	    print "         }\n";
+	    print "         else\n";
+	    print "           save_struc->$name = NULL;\n"
+
+	    } else { # static array
+		print "         /* Prepare to restore static array */\n";
+		print "         max = $size;\n";
+	    }
+
+	    write_line_pp(__LINE__, 0);
+	    print "         done = i = 0;\n";
+	    print "         do {\n";
+	    if ($type eq $type_record) {
+		print "           if (!(value = _cfsml_get_value(fh, line, hiteof))) {\n";
+	    } else {
+		print "           if (!(value = _cfsml_get_identifier(fh, line, hiteof, NULL))) {\n";
+	    }
+	    write_line_pp(__LINE__, 0);
+	    
+	    print "              _cfsml_error(\"Token expected at line %d\\n\", *line);\n";
+	    print "              return 1;\n";
+	    print "           }\n";
+	    print "           if (strcmp(value, \"]\")) {\n";
+	    print "             if (i == max) {\n";
+	    print "               _cfsml_error(\"More elements than space available (%d) in '%s' at ";
+	    print "line %d\\n\", max, token, *line);\n";
+	    print "               return CFSML_FAILURE;\n";
+	    print "             }\n";
+	    my $helper = "[i++]";
+	    print "             if ($reader(fh, &(save_struc->$name$helper), value, line, hiteof)) {\n";
+	    print "                _cfsml_error(\"Token expected by $reader() for $name$helper at line %d\\n\", *line);\n";
+	    print "                return CFSML_FAILURE;\n";
+	    print "             }\n";
+	    print "           } else done = 1;\n";
+	    print "         } while (!done);\n";
+
+	    if ($n->{'array'} eq "dynamic") {
+		my @xpr = lvaluize($expression = $n->{'size'});
+		print "         save_struc->$xpr[0] = max $xpr[1]; /* Set array size accordingly */\n";
+	    }
+
+	    if ($n->{'maxwrite'}) {
+		my @xpr = lvaluize($expression = $n->{'maxwrite'});
+		print "         save_struc->$xpr[0] = i $xpr[1]; /* Set number of elements */\n";
+	    }
+
+	}
+	elsif ($reference) {
+	    write_line_pp(__LINE__, 0);
+	    print "        if (strcmp(value, \"\\\\null\\\\\")) { /* null pointer? */\n";
+	    print "           save_struc->$name = sci_malloc(sizeof ($type));\n";
+	    print "           _cfsml_register_pointer(save_struc->$name);\n";
+	    print "           if ($reader(fh, save_struc->$name, value, line, hiteof)) {\n";
+	    print "              _cfsml_error(\"Token expected by $reader() for $name at line %d\\n\", *line);\n";
+	    print "              return CFSML_FAILURE;\n";
+	    print "           }\n";
+	    print "        } else save_struc->$name = NULL;\n";
+	}
+	else { # It's a simple variable or a struct
+	    write_line_pp(__LINE__, 0);
+	    print "         if ($reader(fh, ($types{$type}{'ctype'}*) &(save_struc->$name), value, line, hiteof)) {\n";
+	    print "            _cfsml_error(\"Token expected by $reader() for $name at line %d\\n\", *line);\n";
+	    print "            return CFSML_FAILURE;\n";
+	    print "         }\n";
+	}
+	print "      } else\n";
+
+      }
+	write_line_pp(__LINE__, 0);
+	print "       {\n";
+	print "          _cfsml_error(\"$type: Assignment to invalid identifier '%s' in line %d\\n\",";
+	print " token, *line);\n";
+	print "          return CFSML_FAILURE;\n";
+	print "       }\n";
+	print "     }\n";
+
+      print "  } while (!closed); /* Until closing braces are hit */\n";
+
+      print $reladdress_resolver; # Resolves any relative addresses
+
+      print "  return CFSML_SUCCESS;\n";
+    } else {
+      print STDERR "Warning: Attempt to create_reader for invalid type '$types{$type}{'type'}'\n";
+    }
+
+    print "}\n\n";
+  }
+
+# Built-in types
+
+%types = (
+	  'int' => {
+		    'type' => $type_integer,
+		    'ctype' => "int",
+		   },
+
+	  'string' => {
+		       'type' => $type_string,
+		       'ctype' => "char *",
+		      },
+	 );
+
+
+
+sub create_function_block {
+  print "\n/* Auto-generated CFSML declaration and function block */\n\n";
+  write_line_pp(__LINE__, 0);
+  print "#define CFSML_SUCCESS 0\n";
+  print "#define CFSML_FAILURE 1\n\n";
+  create_string_functions;
+
+  foreach $n ( keys %types ) {
+    create_declaration($type = $n);
+  }
+
+  foreach $n ( keys %types ) {
+    if (not $types{$n}->{'external'}) {
+      create_writer($type = $n);
+      create_reader($type = $n);
+    }
+  }
+  print "\n/* Auto-generated CFSML declaration and function block ends here */\n";
+  print "/* Auto-generation performed by cfsml.pl $version */\n";
+}
+
+
+# Gnerates code to read a data type
+# Parameters: $type: Type to read
+#             $datap: Pointer to the write destination
+#             $fh: Existing filehandle of an open file to use
+#             $eofvar: Variable to store _cfsml_eof into
+sub insert_reader_code {
+  print "/* Auto-generated CFSML data reader code */\n";
+  write_line_pp(__LINE__, 0);
+  print "  {\n";
+  if (!$linecounter) {
+      write_line_pp(__LINE__, 0);
+      print "    int _cfsml_line_ctr = 0;\n";
+      $linecounter = '_cfsml_line_ctr';
+  }
+  if ($atomic) {
+      write_line_pp(__LINE__, 0);
+      print "    struct _cfsml_pointer_refstruct **_cfsml_myptrrefptr = _cfsml_get_current_refpointer();\n";
+  }
+  write_line_pp(__LINE__, 0);
+  print "    int _cfsml_eof = 0, _cfsml_error;\n";
+  print "    int dummy;\n";
+
+  if ($firsttoken) {
+      write_line_pp(__LINE__, 0);
+      print "    const char *_cfsml_inp = $firsttoken;\n";
+  } else {
+      write_line_pp(__LINE__, 0);
+      print "    const char *_cfsml_inp =".
+	  " _cfsml_get_identifier($fh, &($linecounter), &_cfsml_eof, &dummy);\n\n";
+  }
+
+  write_line_pp(__LINE__, 0);
+  print "    _cfsml_error =".
+      " $types{$type}{'reader'}($fh, $datap, _cfsml_inp, &($linecounter), &_cfsml_eof);\n";
+
+  if ($eofvar) {
+      write_line_pp(__LINE__, 0);
+      print "    $eofvar = _cfsml_error;\n";
+  }
+  if ($atomic) {
+      write_line_pp(__LINE__, 0);
+      print "     _cfsml_free_pointer_references(_cfsml_myptrrefptr, _cfsml_error);\n";
+  }
+  write_line_pp(__LINE__, 0);
+  print "     if (_cfsml_last_value_retrieved) {\n";
+  print "       free(_cfsml_last_value_retrieved);\n";
+  print "       _cfsml_last_value_retrieved = NULL;\n";
+  print "     }\n";
+  print "     if (_cfsml_last_identifier_retrieved) {\n";
+  print "       free(_cfsml_last_identifier_retrieved);\n";
+  print "       _cfsml_last_identifier_retrieved = NULL;\n";
+  print "     }\n";
+  print "  }\n";
+  print "/* End of auto-generated CFSML data reader code */\n";
+}
+
+# Generates code to write a data type
+# Parameters: $type: Type to write
+#             $datap: Pointer to the write destination
+#             $fh: Existing filehandle of an open file to use
+sub insert_writer_code {
+    write_line_pp(__LINE__, 0);
+    print "/* Auto-generated CFSML data writer code */\n";
+    print "  $types{$type}{'writer'}($fh, $datap);\n";
+    print "  fprintf($fh, \"\\n\");\n";
+    print "/* End of auto-generated CFSML data writer code */\n";
+}
+
+
+################
+# Main program #
+################
+
+$parsing = 0;
+$struct = undef; # Not working on a struct
+$commentmode = undef;
+$line = 0;
+
+while (<STDIN>) {
+
+  $line++;
+
+  if ($parsing) {
+    ($data) = split "#"; # Remove shell-style comments
+    @_ = ($data);
+
+    s/\/\*.*\*\///g; # Remove C-style one-line comments
+
+    ($data) = split "\/\/"; # Remove C++-style comments
+    @_ = ($data);
+
+    if ($commentmode) {
+
+      if (grep /\*\//, $_) {
+	($empty, $_) = split /\*\//;
+      } else {
+	@_ = (); # Empty line
+      }
+
+    } else {
+      if (grep /\/\*/, $_) {
+	$commentmode = 1;
+	($_) = split /\/\*/;
+      }
+    }
+
+
+    # Now tokenize:
+    s/;//;
+    split /(\".*\"|[,\[\]\(\)\{\}])|\s+/;
+
+    @items = @_;
+
+    @tokens = ();
+
+    $tokens_nr = 0;
+    for ($n = 0; $n < scalar @items; $n++) { # Get rid of all undefs
+      if ($_[$n]) {
+	$_ = $items[$n];
+	s/\"//g;
+	$tokens[$tokens_nr++] = $_;
+      }
+    }
+
+    # Now all tokens are in @tokens, and we have $tokens_nr of them.
+
+#    print "//DEBUG: " . join ("|", @tokens) . "\n";
+
+    if ($tokens_nr) {
+      if ($tokens_nr == 2 && $tokens[0] eq "%END" && $tokens[1] eq "CFSML") {
+
+	$struct && die "Record $struct needs closing braces in intput file (line $line).";
+
+	$parsing = 0;
+	create_function_block;
+	my $linep = $line + 1;
+	write_line_pp($linep, 1);
+      } elsif ($struct) { # Parsing struct
+	if ($tokens_nr == 1) {
+	  if ($tokens[0] eq "}") {
+	    $struct = undef;
+	  } else { die "Invalid declaration of $token[0] in input file (line $line)\n";};
+	} else { # Must be a member declaration
+
+	  my @structrecs = (@{$records{$struct}});
+	  my $newidx = (scalar @structrecs) or "0";
+	  my %member = ();
+	  $member{'name'} = $tokens[1];
+	  $member{'type'} = $tokens[0];
+
+	  if ($tokens_nr == 3 && $tokens[1] == "*") {
+	      $tokens_nr = 2;
+	      $member{'name'} = $tokens[2];
+	      $member{'reftype'} = $tokens[0];
+	      $member{'type'} = $type_abspointer;
+	  }
+
+	  if ($tokens_nr == 4 and $tokens[0] eq $type_pointer) { # Relative pointer
+
+	    if (not $tokens[2] eq "RELATIVETO") {
+	      die "Invalid relative pointer declaration in input file (line $line)\n";
+	    }
+
+	    $member{'anchor'} = $tokens[3]; # RelPointer anchor
+
+	  } else { # Non-pointer
+
+	    if (not $types{$tokens[0]}) {
+	      die "Unknown type $tokens[0] used in input file (line $line)\n";
+	    }
+
+	    if ($tokens_nr > 2) { # Array
+
+	      if ($tokens[2] ne "[") {
+		die "Invalid token '$tokens[2]' in input file (line $line)\n";
+	      }
+
+	      $member{'array'} = "static";
+
+	      if ($tokens[$tokens_nr - 1] ne "]") {
+		die "Array declaration incorrectly terminated in input file (line $line)\n";
+	      }
+
+	      $parsepos = 3;
+
+	      while ($parsepos < $tokens_nr) {
+
+		if ($tokens[$parsepos] eq ",") {
+
+		  $parsepos++;
+
+		} elsif ($tokens[$parsepos] eq "STATIC") {
+
+		  $member{'array'} = "static";
+		  $parsepos++;
+
+		} elsif ($tokens[$parsepos] eq "DYNAMIC") {
+
+		  $member{'array'} = "dynamic";
+		  $parsepos++;
+
+		} elsif ($tokens[$parsepos] eq "MAXWRITE") {
+
+		  $member{'maxwrite'} = $tokens[$parsepos + 1];
+		  $parsepos += 2;
+
+		} elsif ($tokens[$parsepos] eq "]") {
+
+		  $parsepos++;
+		  if ($parsepos != $tokens_nr) {
+		    die "Error: Invalid tokens after array declaration in input file (line $line)\n";
+
+		  }
+		} else {
+
+		  if ($member{'size'}) {
+		    die "Attempt to use more than one array size in input file (line $line)\n" .
+		      "(Original size was \"$member->{'size'}\", new size is \"$tokens[$parsepos]\"\n";
+		  }
+
+		  $member{'size'} = $tokens[$parsepos];
+		  $parsepos++;
+		}
+	      }
+
+
+	      unless ($member{'size'}) {
+		die "Array declaration without size in input file (line $line)\n";
+	      }
+	    }
+	  }
+
+	  @{$records{$struct}}->[$newidx] = \%member;
+	}
+      } else { # not parsing struct; normal operation.
+
+	if ($tokens[0] eq "TYPE") { # Simple type declaration
+
+	  my $newtype = $tokens[1];
+
+	  $types{$newtype}->{'ctype'} = $tokens[2];
+
+	  if ($tokens_nr == 5) { # must be ...LIKE...
+
+	    unless ($tokens[3] eq "LIKE") {
+	      die "Invalid TYPE declaration in input file (line $line)\n";
+	    }
+
+	    $types{$newtype}->{'type'} = $types{$tokens[4]}->{'type'};
+	    $types{$newtype}->{'reader'} = $types{$tokens[4]}->{'reader'};
+	    $types{$newtype}->{'writer'} = $types{$tokens[4]}->{'writer'};
+
+	  } elsif ($tokens_nr == 6) { # must be ...USING...
+
+	    unless ($tokens[3] eq "USING") {
+	      die "Invalid TYPE declaration in input file (line $line)\n";
+	    }
+
+	    $types{$newtype}->{'writer'} = $tokens[4];
+	    $types{$newtype}->{'reader'} = $tokens[5];
+	    $types{$newtype}->{'external'} = 'T';
+
+	  } else {
+	    die "Invalid TYPE declaration in input file (line $line)\n";
+	  }
+
+	} elsif ($tokens[0] eq "RECORD") {
+
+	  $struct = $tokens[1];
+	  if ($types{$struct}) {
+	    die "Attempt to re-define existing type $struct as a struct in input file (line $line)";
+	  }
+	  $types{$struct}{'type'} = $type_record;
+	  if ($tokens_nr < 3 or $tokens_nr > 6 or $tokens[$tokens_nr - 1] ne "{") {
+	    die "Invalid record declaration in input file (line $line)";
+	  }
+
+	  my $extoffset = 2;
+
+	  if ($tokens_nr > 3) {
+	      if ($tokens[2] ne "EXTENDS") { # Record declaration with explicit c type
+		  $types{$struct}{'ctype'} = $tokens[2];
+		  $extoffset = 3;
+	      } else { # Record name is the same as the c type name
+		  $types{$struct}{'ctype'} = $struct;
+	      }
+	  } elsif ($tokens_nr == 3) {
+		  $types{$struct}{'ctype'} = $struct;
+	  }
+
+	  if (($tokens_nr > $extoffset + 1) && ($extoffset + 1 <= $tokens_nr)) {
+	      if ($tokens[$extoffset] ne "EXTENDS") {
+		  die "Invalid or improper keyword \"$tokens[$extoffset]\" in input file (line $line)";
+	      }
+	      if ($extoffset + 2 >= $tokens_nr) {
+		  die "RECORD \"$struct\" extends on unspecified type in input file (line $line)";
+	      }
+	      my $ext_type = $tokens[$extoffset + 1];
+
+	      if (!($types{$ext_type}{type} eq $type_record)) {
+		  print "$types{$ext_type}{type}";
+		  die "RECORD \"$struct\" attempts to extend non-existing or non-record type \"$ext_type\" in input file (line $line)";
+	      }
+
+	      (@{$records{$struct}}) = (@{$records{$ext_type}}); # Copy type information from super type
+	  }
+
+	} else {
+	  die "Invalid declaration \"$tokens[0]\" in line $line";
+	}
+      }
+    }
+
+
+  } else {
+
+    ($subtoken) = split ";"; # Get rid of trailing ;s
+    $tokens_nr = @tokens = split " ", $subtoken;
+
+    if ($tokens_nr == 1 && $tokens[0] eq "%CFSML") {
+
+      $parsing = 1;
+
+    } elsif ($tokens[0] eq "%CFSMLWRITE" and $tokens[3] eq "INTO" and $tokens_nr >= 5) {
+
+      insert_writer_code($type = $tokens[1], $datap = $tokens[2], $fh = $tokens[4]);
+      my $templine = $line + 1;
+      write_line_pp($templine, 1); # Yes, this sucks.
+
+    } elsif (($tokens[0] eq "%CFSMLREAD") or ($tokens[0] eq "%CFSMLREAD-ATOMIC") and $tokens[3] eq "FROM" and $tokens_nr >= 5) {
+
+      my $myeofvar = 0;
+      my $myfirsttoken = 0;
+      my $mylinecounter = 0;
+
+      my $idcounter = 5;
+
+      while ($idcounter < $tokens_nr) {
+	if ($tokens[$idcounter] eq "ERRVAR" and $tokens_nr >= $idcounter + 2) {
+	  $myeofvar = $tokens[$idcounter + 1];
+	  $idcounter += 2;
+	} elsif ($tokens[$idcounter] eq "FIRSTTOKEN" and $tokens_nr >= $idcounter + 2) {
+	  $myfirsttoken = $tokens[$idcounter + 1];
+	  $idcounter += 2;
+	} elsif ($tokens[$idcounter] eq "LINECOUNTER" and $tokens_nr >= $idcounter + 2) {
+	  $mylinecounter = $tokens[$idcounter + 1];
+	  $idcounter += 2;
+	} else {
+	  die "Unknown %CFSMLREAD operational token: $tokens[$idcounter]\n";
+	}
+      }
+      insert_reader_code($type = $tokens[1], $datap = $tokens[2],
+			 $fh = $tokens[4], $eofvar = $myeofvar, $firsttoken = $myfirsttoken,
+			$linecounter = $mylinecounter, $atomic = ($tokens[0] eq "%CFSMLREAD-ATOMIC"));
+      my $templine = $line + 1;
+      write_line_pp($templine, 1); # Yes, this sucks, too.
+
+    } else {
+      print;
+    }
+  }
+
+}
+
+if ($parsing) {
+  print <STDERR>, "Warning: Missing %END CFSML\n";
+}