Remove redundant accessors from virtual machine.
	
	* src/vm/virtual_machine.hh (get_cpu_register, get_cpu_pc):
	Remove.
	* src/shell/shell.hh: Use VirtualMachine::get_cpu() instead.

	Display the number of executed R,I and J-type instructions on
	profile.

	* src/vm/cpu.hh, src/vm/cpu.cc: Add an array of counters and
	update them for each executed instruction.
	* src/vm/virtual_machine.hh: Add accessor to CPU.
	* src/vm-tasks.cc: Print the counters on profile.

	Specify instruction format type to distinguish register, immediate
	and jump instructions.

	* src/inst/inst.hh: Add a format attribute.
	* dev/nolimips.xml, dev/nolimips.py, dev/inst-nodes-gen.py: 
	Fill it.
	

	Provide `--profile' option.

	* src/vm/virtual_machine.hh: Add accessor to control coprocessor.
	* src/vm-tasks.hh, src/vm-tasks.cc: Declare and define the
	`profile' task. For the moment, simply print on stderr the number
	of executed cyles at the end of the program's execution.

	Implement print_err.
	
	* src/vm/cpu.c: Print buffer pointed to by $a0 on standard 
	error stream on syscall when $v0 = 15.

	* src/inst/data_section.hh, src/inst/data_section.cc,
	* src/inst/text_section.hh, src/inst/text_section.cc:
	Maintain a list of encountered (not sorted) labels. Use it to 
	print the content of the sections.
	* src/inst/section.hh: Remove deprecated attributes.
	* src/inst/text_label.hh (get_iterator): Constify return value.

	* src/inst/section.hh: Store the labels in a set. Use Labels to get 
	the offset.
	* src/inst/label.hh (deref_ptr_less): Declare and define a label 
	pointer comparator.

	Store an iterator in TextLabels.

	* src/inst/text_label.hh: Do it.
	* src/inst/text_section.hh (define_label): Move its 
	implementation into...
	* src/inst/text_section.cc (define_label): This file, to solve 
	inclusion cycle.

	Prepare iterator in text_label storage.
	
	* src/inst/text_section.hh: Maintain an iterator on the very last 
	instruction slot.

	Store the instructions in a list to prepare future random insertions.
	
	* src/inst/text_section.hh: Store the instructions in a list 
	instead of a vector to ease random insertions.
	* src/inst/text_section.cc (~TextSection, print): Use TextSection's 
	typedefs and dedicated begin and end to iterate through the  
	instruction container.
	* dev/inst-solver-gen.py: Use operator!= instead of operator< to 
	stop the iteration.
	

	Make Label compose its associated offset.

	* src/inst/label.hh: Protect default constructor. Compose its
	associated offset. Add a constructor that waits for it.
	* src/inst/section.hh (has_label, get_offset): Update accordingly.
	(register_label): Wait for a Label only and use it to get its offset.
	* src/inst/data_section.hh: Update accordingly.
	* src/inst/text_label.hh: New.
	* src/inst/Makefile.am: Update accordingly.
	* src/inst/text_section.hh: Create TextLabels instead of Labels.
	* src/inst/text_section.cc: Include inst.hh to gain access
	to Inst's interface.

from  Benoît Perrot  <benoit@lrde.epita.fr>

	Make LabelExp independent from Label.

	* src/inst/exp.hh, src/inst/exp.cc:
	Make LabelExp aggregate a unique_string instead of a Label.
	* dev/parse-asm-scan-gen.py: Return a unique_string when 
	scanning an identifier (instead	of a Label).
	* dev/parse-asm-parse-gen.py: Update accordingly.
	* src/inst/section.hh (has_label, get_offset): Wait for a
	unique_string (instead of a Label).
	* dev/inst-builder-gen.py, dev/inst-solver-gen.py,
	* src/vm/virtual_machine.cc, src/shell/shell.cc:
	Update accordingly.

from  Benoît Perrot  <benoit@lrde.epita.fr>

	Let concrete sections choose how to handle labels definitions.

	* src/inst/section.hh (add_label): Rename as `register_label'.
	* src/inst/data_section.hh, src/inst/text_section.hh:
	(add_label): Rename as...
	(define_label): This, and make it wait for a unique_string and 
	build the label.
	* dev/parse-asm-scan-gen.py: Return a unique_string on a 
	label definition.
	* dev/parse-asm-parse-gen.py: Update accordingly.

Index: src/inst/data_section.hh
--- src/inst/data_section.hh	(revision 160)
+++ src/inst/data_section.hh	(working copy)
@@ -54,9 +54,9 @@
     }
     
   public:
-    void		add_label(Label *label)
+    void		define_label(const misc::unique_string &id)
     {
-      Section::add_label(label, size_);
+      Section::register_label(new inst::Label(id), size_);
     }
     
   public:
Index: src/inst/section.hh
--- src/inst/section.hh	(revision 160)
+++ src/inst/section.hh	(working copy)
@@ -49,7 +49,7 @@
     {}
     
   protected:
-    void		add_label(Label *label, int offset)
+    void		register_label(Label *label, int offset)
     {
       // FIXME: check that this label has not already been added.
       offsets_[*label] = offset;
Index: src/inst/text_section.hh
--- src/inst/text_section.hh	(revision 160)
+++ src/inst/text_section.hh	(working copy)
@@ -54,9 +54,9 @@
     }
 
   public:
-    void		add_label(Label *label)
+    void		define_label(const misc::unique_string &id)
     {
-      Section::add_label(label, insts_.size() * 4);
+      Section::register_label(new inst::Label(id), insts_.size() * 4);
     }
 
   public:
Index: dev/inst-builder-gen.py
--- dev/inst-builder-gen.py	(revision 160)
+++ dev/inst-builder-gen.py	(working copy)
@@ -78,14 +78,14 @@
     }
     
   public:
-    void		add_inst_label(Label *label)
+    void		define_inst_label(const misc::unique_string &id)
     {
-      program_->text_section ().add_label(label);
+      program_->text_section ().define_label(id);
     }
 
-    void		add_data_label(Label *label)
+    void		define_data_label(const misc::unique_string &id)
     {
-      program_->data_section ().add_label(label);
+      program_->data_section ().define_label(id);
     }
 
   public:
Index: dev/parse-asm-scan-gen.py
--- dev/parse-asm-scan-gen.py	(revision 160)
+++ dev/parse-asm-scan-gen.py	(working copy)
@@ -71,7 +71,7 @@
 dec_int			[0-9]+
 hex_int			0x[0-9A-Fa-f]+
 
-label			[a-zA-Z_][a-zA-Z_0-9]*
+id			[a-zA-Z_][a-zA-Z_0-9]*
 %%
 
 %{
@@ -144,14 +144,14 @@
 }
 
 
-{label}			{
+{id}			{
   yylval->label = new inst::Label (yytext);
   return LABEL;
 }
-{label}\":\"		{
+{id}\":\"		{
   std::string label = yytext;
   label.resize(yyleng - 1);
-  yylval->label = new inst::Label (label);
+  yylval->id = &misc::unique_string::create(label);
   return LABEL_DEF;
 }
 
Index: dev/parse-asm-parse-gen.py
--- dev/parse-asm-parse-gen.py	(revision 160)
+++ dev/parse-asm-parse-gen.py	(working copy)
@@ -75,6 +75,7 @@
 {
   int			i;
   std::string		*s;
+  const misc::unique_string	*id;
   inst::Label           *label;
   inst::Register        *reg;
   inst::Exp             *exp;
@@ -84,7 +85,7 @@
 %}
 
 %token <label> LABEL		\"label\"
-%token <label> LABEL_DEF	\"label definition\"
+%token <id> LABEL_DEF		\"label definition\"
 %token <i> INTEGER              \"integer\"
 %token <s> STRING               \"string\"
 %token <reg> REGISTER           \"register\"
@@ -138,7 +139,7 @@
 data
 // Label
 :  LABEL_DEF
-{ program_builder.add_data_label($1); }
+{ program_builder.define_data_label(*$1); }
 
 // Uninitialized space
 | DIR_SPACE INTEGER
@@ -169,7 +170,7 @@
 instruction
 // Label
 : LABEL_DEF
-{ program_builder.add_inst_label($1); }
+{ program_builder.define_inst_label(*$1); }
 
 // Opcodes"""
 

from  Benoît Perrot  <benoit@lrde.epita.fr>

	Copy the instruction list of text section when storing one.

	* src/inst/text_section.hh, dev/inst-solver-gen.py:
	Hide the concrete type of instruction list.
	* src/vm/mmu.hh: Aggregate the instructions instead of 
	a text section.
	(inst_store) Copy the instruction pointers into a local vector.
	(inst_load) Access the local vector instead of text section. 

from  Benoît Perrot  <benoit@lrde.epita.fr>

	Hide the text section loaded in virtual machine's memory.

	* src/vm/mmu.hh (inst_has_label, inst_get_offset): Remove.
	* src/vm/virtual_machine.hh (has_label, get_offset): Remove.
	(add_breakpoint) Wait for an offset instead of a label.
	* src/vm/virtual_machine.cc: Update accordingly, move label
	translation into...
	* src/shell/shell.cc (do_break): ...this method.

from  Benoît Perrot  <benoit@lrde.epita.fr>

	Introduce some (weak) reentrancy into lexer.

	* dev/parse-asm-scan-gen.py: Maintain a stack of scanning states.
	This comes from the LRDE's Tiger Compiler's scanner.

from  Benoît Perrot  <benoit@lrde.epita.fr>

	Fix shell's `load' command.
	
	* src/shell.hh: Implement destructor in corresponding .cc.
	Aggregate the program being run.
	* src/shell.cc (do_load): Recover on parse or solve error.
	(do_load, do_run, do_continue, do-next, do_break) Use aggregated
	program pointer instead of global one.

from  Benoît Perrot  <benoit@lrde.epita.fr>

	* src/shell.hh (is_register, is_label, get_next_word): 
	Rename and move into...
	* src/shell.cc (eat_register, eat_label, eat_word):
	This.

from  Benoît Perrot  <benoit@lrde.epita.fr>

	Introduce utilities for lexical analysis.
	
	* src/misc/lexutils.hh, src/misc/lexutils.cc:
	Pack utilities for lexical analysis in these files.
	* src/misc/Makefile.am: Update accordingly.
	* src/shell/shell.hh, src/shell/shell.cc:
	Use lexutils.

from  Benoît Perrot  <benoit@lrde.epita.fr>

	Improve command identifiers recognition.

	* src/shell/cmd.hh: Rename
	(cmd_type_type, cmd_type_, get_type) as
	(identifier_type, id_, get_identifier) for readability.
	* src/shell/shell.hh (eat_word): Rename as 
	(eat_command_id) and move its implementation into...
	* src/shell/shell.cc: This file. Recognize uncomplete command
	identifiers and warn on ambiguity. Factor `build_cmd'.

from  Benoît Perrot  <benoit@lrde.epita.fr>

	Introduce unique_strings.
	
	* src/misc/unique_string.hh, src/misc/unique_string.cc:
	Declare and define the string uniquifier.
	* src/misc/test-unique_string.cc: Test it.
	* src/misc/Makefile.am: Update accordingly.
	* src/Makefile.am: Link with libmisc.a.
	* src/inst/section.hh, src/inst/label.hh: 
	Use misc::unique_string instead of std::string.
	* src/inst/label.cc: Empty it. 

from  Benoît Perrot  <benoit@lrde.epita.fr>
2005-01-08  Benoît Perrot  <benoit@lrde.epita.fr>

	Migrate to bison2.0a.
	
	* dev/parse-asm-parse-gen.py: Call the parser with a filename and
	a program builder instead of using global variables. Use bison's
	builtin system to print token values. Remove global program builder.
	* dev/parse-asm-scan-gen.py: Remove global string for file name. 
	Use yy::location instead of yy::Location.
	* src/parse/asm-scan.hh: Call the scanner with a trace flag.
	* src/parse/libparse.hh, src/parse/libparse.cc:
	Declare trace flags as booleans. 
	* src/vm/cp0.hh: Include common.hh to get exit_set.

from  Benoît Perrot  <benoit@lrde.epita.fr>

	Strengthen lexical analysis.
	
	* dev/parse-asm-scan-gen.py: Complain when a lexicaly correct
	integer cannot be converted by istringstream, for example when the
	said integer is too large. For hexadecimal integers, a maximal
	number of digits might be used, but it seems more generic to
	handle it through istringstream; never knowns, someday nolimips
	may have to support 64 or event 128 bits long integers :). Call
	step() each time an invalid character is detected, to have a more
	clever error message. Step only one line when an eol sequence is
	detected.
	* tests/lexical/invalid-characters.s, integer-too-large.s: New.
	* tests/lexical/Makefile.am: Update accordingly.

from  Benoît Perrot  <benoit@lrde.epita.fr>

	Kill (some) autotools warnings. Some m4 files from GNUlib still use
	deprecated autotools constructions.

	* src/vm/Makefile.am, src/misc/Makefile.am,
	* src/task/Makefile.am, src/shell/Makefile.am,
	* src/parse/Makefile.am, src/inst/Makefile.am,
	* src/Makefile.am:
	Use *_CPPFLAGS instead of obsoleted INCLUDES.
	* configure.ac:
	Run autoupdate.

from  Benoît Perrot  <benoit@lrde.epita.fr>

	Move tasks to top level, to make libraries "side-effect free".
	
	* src/task/task-tasks.hh, src/task/task-tasks.cc,
	* src/parse/parse-tasks.hh, src/parse/parse-tasks.cc
	* src/inst/inst-tasks.hh, src/inst/inst-tasks.cc
	* src/vm/vm-tasks.hh, src/vm/vm-tasks.cc,
	* src/shell/shell-tasks.hh, src/shell/shell-tasks.cc:
	Move to...
	* src/task-tasks.hh, src/task-tasks.cc,
	* src/parse-tasks.hh, src/parse-tasks.cc
	* src/inst-tasks.hh, src/inst-tasks.cc
	* src/vm-tasks.hh, src/vm-tasks.cc,
	* src/shell-tasks.hh, src/shell-tasks.cc:
	These files.
	* src/task/Makefile.am,
	* src/parse/Makefile.am,
	* src/inst/Makefile.am,
	* src/vm/Makefile.am, 
	* src/shell/Makefile.am,
	* src/Makefile.am,
	* src/modules.hh:
	Update accordingly.

from  Benoît Perrot  <benoit@lrde.epita.fr>

	Use GNUlib as it shall be. Thanks to Akim Demaille and Paul Eggert
	for showing me the right way to do it.

	* bootstrap: Get gnulib files from CVS repository or local
	directory (extracted from GNU tar's bootstrap script, written by
	Paul Eggert and Sergey Poznyakoff).
	* lib/Makefile.am.tmpl: New.
	* Makefile.am: Add `lib' as subdirectory.
	* configure.ac: Use gnulib's automake snippets.
	* src/stdint_.h, config/stdint.m4, config/inttypes.m4:
	Remove, as deprecated by the correct use of gnulib.
	* src/Makefile.am, src/vm/Makefile.am, src/inst/Makefile.am:
	Update accordingly.

from  Benoît Perrot  <benoit@lrde.epita.fr>

	* dev/inst-solver-gen.py: Include config.h to get configuration 
	needed by <stdint.h>.

from  Benoît Perrot  <benoit@lrde.epita.fr>

	* src/parse/libparse.cc: Use the up-to-date bison parser
	constructor. make check failed on platforms that have bison1.875e,
	which generates an error message when the deprecated parser
	constructor is invoked.

from  Benoît Perrot  <benoit@lrde.epita.fr>

	* bootstrap: Update the time stamp of reference output files to
	avoid them to be illegitimately regenerated when checked out from
	the repository.

from  Benoît Perrot  <benoit@lrde.epita.fr>
2004-10-31  Benoît Perrot  <benoit@lrde.epita.fr>

	* configure.ac:
	Check <sys/int_limits.h> presence.
	* src/stdint_.h:
	Use <sys/int_limits.h> when it is present to define limit macros.
	A problem occured on our SunOS: <stdint_.h> includes <sys/int_limits.h>
	through several files, leading to a macro definition clash.

from  Benoît Perrot  <benoit@lrde.epita.fr>

	* configure.ac:
	Check isblank presence.
	* src/shell/shell.hh, src/shell/shell.cc:
	Provide isblank when the platform lack it.

from  Benoît Perrot  <benoit@lrde.epita.fr>

	* src/vm/cpu.cc:
	Effectively use Cpu::register_type, and not system's register_t.
	cpu.cc did not compile on SunOS, where register_t is not defined.

from  Benoît Perrot  <benoit@lrde.epita.fr>

	* config/stdint.m4, config/inttypes.m4:
	GNUlib's <stdint.h>/<inttypes.h> detection tools.
	* configure.ac:
	Use gl_HAVE_STDINT_H to check <stdint.h>/<inttypes.h> presence.
	Define __STDC_LIMIT_MACROS to access to some macros that 
	the ISO C99 standard specifies to be explicitly requested 
	in C++ implementation.
	* src/stdint_.h:
	GNUlib's "ISO C 99 <stdint.h> for platforms that lack it."
	* src/Makefile.am:
	Generate stdint.h from stdint_.h on platforms that lack it.

	* src/vm/cpu.hh, src/vm/memory.hh, src/inst/data_section.hh:
	Include config.h to get information on <stdint.h>/<inttypes.h>
	presence.

        * dev/parse-asm-scan-gen.py: Add missing <cerrno> header for `errno'.
        The problem appeared on NetBSD.

        Fix problem with case-insensitive filesystems.

        * distrib/debian/changelog: Rename as...
        * distrib/debian/changelog-deb: ...this.
        * distrib/debian/Makefile.am: Adjust.

        * bootstrap.sh: Stop at first error (sh -e).
        Don't use "cd -" because it does not work with BSD's /bin/sh.

from  Benoît Perrot  <benoit@lrde.epita.fr>

	Participate to "builddir != srcdir" compilation.

	* dev/inst-builder-gen.py,
	* dev/inst-nodes-gen.py,
	* dev/inst-solver-gen.py,
	* dev/doc-inst-set-gen.py,
	* dev/parse-asm-scan-gen.py,
	* dev/parse-asm-parse-gen.py:
	Ask for a directory where the files have to be generated.
	* src/parse/Makefile.am,
	* src/inst/Makefile.am,
	* doc/Makefile.am:
	Specify the directory where to generate.

from  Benoît Perrot  <benoit@lrde.epita.fr>

	Use a dedicated script to launch bison to control the directory
	where the generated files are output.

	* config/move-if-change, config/bison++: Provided by Akim Demaille.
	* config/Makefile.am: Distribute them.
	* src/parse/Makefile.am: Use bison++.

from  Benoît Perrot  <benoit@lrde.epita.fr>

	* dev/inst-nodes-mk-gen.py: Split into...
	* src/inst/Makefile.am: This file.