add tests and mimic Scilab behaviour sign(0) = 0

12 files changed, 421 insertions, 213 deletions

diff --git a/src/auxiliaryFunctions/sign/Makefile.am b/src/auxiliaryFunctions/sign/Makefile.am
index c421beea..ba5e2bc9 100644
--- a/src/auxiliaryFunctions/sign/Makefile.am
+++ b/src/auxiliaryFunctions/sign/Makefile.am
@@ -1,25 +1,24 @@
 ##
-##  -*- makefile -*-
+##  Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
+##  Copyright (C) 2007-2008 - INRIA - Bruno JOFRET
 ##
-## Makefile
-## Made by  Bruno JOFRET <bruno.jofret@inria.fr>
+##  This file must be used under the terms of the CeCILL.
+##  This source file is licensed as described in the file COPYING, which
+##  you should have received as part of this distribution.  The terms
+##  are also available at
+##  http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
 ##
-## Started on  Fri Jan  5 10:19:16 2007 jofret
-## Last update Wed Apr 18 18:45:11 2007 jofret
-##
-## Copyright INRIA 2007
 ##
 
-AM_CFLAGS =	-I ../../type \
-		-I ../includes
+libSign_la_CFLAGS =	-I $(top_builddir)/type \
+			-I $(top_builddir)/elementaryFunctions/includes \
+			-I $(top_builddir)/auxiliaryFunctions/includes
 
 instdir = $(top_builddir)/lib
 
-inst_LIBRARIES =	libSign.a
-
-noinst_LIBRARIES =	libSign.a
+pkglib_LTLIBRARIES =	libSign.la
 
-libSign_a_SOURCES =	$(HEAD) $(SRC)
+libSign_la_SOURCES =	$(HEAD) $(SRC)
 
 SRC	=	ssigns.c \
 		dsigns.c \
@@ -37,7 +36,8 @@ HEAD	=	../includes/sign.h
 ####
 
 check_INCLUDES	=	-I $(top_builddir)/elementaryFunctions/includes \
-			-I $(top_builddir)/type
+			-I $(top_builddir)/type \
+			-I $(top_builddir)/auxiliaryFunctions/includes
 
 check_PROGRAMS	= 	testSign
 
@@ -48,7 +48,9 @@ TESTS		=	testSign
 #
 testSign_SOURCES = 	testSign.c
 testSign_CFLAGS	=	$(check_INCLUDES)
-testSign_LDADD	=	$(top_builddir)/lib/libDoubleComplex.a \
-			$(top_builddir)/lib/libFloatComplex.a \
-			$(top_builddir)/lib/libSign.a \
+testSign_LDADD	=	$(top_builddir)/type/libDoubleComplex.la \
+			$(top_builddir)/type/libFloatComplex.la \
+			$(top_builddir)/elementaryFunctions/sqrt/libSqrt.la \
+			$(top_builddir)/auxiliaryFunctions/abs/libAbs.la \
+			$(top_builddir)/auxiliaryFunctions/sign/libSign.la \
 			@LIBMATH@
diff --git a/src/auxiliaryFunctions/sign/Makefile.in b/src/auxiliaryFunctions/sign/Makefile.in
index ccc73d21..f27d27e3 100644
--- a/src/auxiliaryFunctions/sign/Makefile.in
+++ b/src/auxiliaryFunctions/sign/Makefile.in
@@ -37,8 +37,7 @@ TESTS = testSign$(EXEEXT)
 subdir = auxiliaryFunctions/sign
 DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
-am__aclocal_m4_deps = $(top_srcdir)/m4/fortran.m4 \
-	$(top_srcdir)/configure.ac
+am__aclocal_m4_deps = $(top_srcdir)/configure.ac
 am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
 	$(ACLOCAL_M4)
 mkinstalldirs = $(install_sh) -d
@@ -50,40 +49,49 @@ am__vpath_adj = case $$p in \
     *) f=$$p;; \
   esac;
 am__strip_dir = `echo $$p | sed -e 's|^.*/||'`;
-am__installdirs = "$(DESTDIR)$(instdir)"
-instLIBRARIES_INSTALL = $(INSTALL_DATA)
-LIBRARIES = $(inst_LIBRARIES) $(noinst_LIBRARIES)
-AR = ar
-ARFLAGS = cru
-libSign_a_AR = $(AR) $(ARFLAGS)
-libSign_a_LIBADD =
+am__installdirs = "$(DESTDIR)$(pkglibdir)"
+pkglibLTLIBRARIES_INSTALL = $(INSTALL)
+LTLIBRARIES = $(pkglib_LTLIBRARIES)
+libSign_la_LIBADD =
 am__objects_1 =
-am__objects_2 = ssigns.$(OBJEXT) dsigns.$(OBJEXT) csigns.$(OBJEXT) \
-	zsigns.$(OBJEXT) ssigna.$(OBJEXT) dsigna.$(OBJEXT) \
-	csigna.$(OBJEXT) zsigna.$(OBJEXT)
-am_libSign_a_OBJECTS = $(am__objects_1) $(am__objects_2)
-libSign_a_OBJECTS = $(am_libSign_a_OBJECTS)
+am__objects_2 = libSign_la-ssigns.lo libSign_la-dsigns.lo \
+	libSign_la-csigns.lo libSign_la-zsigns.lo libSign_la-ssigna.lo \
+	libSign_la-dsigna.lo libSign_la-csigna.lo libSign_la-zsigna.lo
+am_libSign_la_OBJECTS = $(am__objects_1) $(am__objects_2)
+libSign_la_OBJECTS = $(am_libSign_la_OBJECTS)
+libSign_la_LINK = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) \
+	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(libSign_la_CFLAGS) \
+	$(CFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@
 am_testSign_OBJECTS = testSign-testSign.$(OBJEXT)
 testSign_OBJECTS = $(am_testSign_OBJECTS)
-testSign_DEPENDENCIES = $(top_builddir)/lib/libDoubleComplex.a \
-	$(top_builddir)/lib/libFloatComplex.a \
-	$(top_builddir)/lib/libSign.a
-testSign_LINK = $(CCLD) $(testSign_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) \
+testSign_DEPENDENCIES = $(top_builddir)/type/libDoubleComplex.la \
+	$(top_builddir)/type/libFloatComplex.la \
+	$(top_builddir)/elementaryFunctions/sqrt/libSqrt.la \
+	$(top_builddir)/auxiliaryFunctions/abs/libAbs.la \
+	$(top_builddir)/auxiliaryFunctions/sign/libSign.la
+testSign_LINK = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
+	--mode=link $(CCLD) $(testSign_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) \
 	$(LDFLAGS) -o $@
 DEFAULT_INCLUDES = -I. -I$(top_builddir)/includes@am__isrc@
 depcomp = $(SHELL) $(top_srcdir)/config/depcomp
 am__depfiles_maybe = depfiles
 COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
 	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
+LTCOMPILE = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
+	--mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) \
+	$(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
 CCLD = $(CC)
-LINK = $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@
-SOURCES = $(libSign_a_SOURCES) $(testSign_SOURCES)
-DIST_SOURCES = $(libSign_a_SOURCES) $(testSign_SOURCES)
+LINK = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
+	--mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) \
+	$(LDFLAGS) -o $@
+SOURCES = $(libSign_la_SOURCES) $(testSign_SOURCES)
+DIST_SOURCES = $(libSign_la_SOURCES) $(testSign_SOURCES)
 ETAGS = etags
 CTAGS = ctags
 DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 ACLOCAL = @ACLOCAL@
 AMTAR = @AMTAR@
+AR = @AR@
 AUTOCONF = @AUTOCONF@
 AUTOHEADER = @AUTOHEADER@
 AUTOMAKE = @AUTOMAKE@
@@ -94,11 +102,13 @@ CFLAGS = @CFLAGS@
 CPP = @CPP@
 CPPFLAGS = @CPPFLAGS@
 CXX = @CXX@
+CXXCPP = @CXXCPP@
 CXXDEPMODE = @CXXDEPMODE@
 CXXFLAGS = @CXXFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEFS = @DEFS@
 DEPDIR = @DEPDIR@
+ECHO = @ECHO@
 ECHO_C = @ECHO_C@
 ECHO_N = @ECHO_N@
 ECHO_T = @ECHO_T@
@@ -116,6 +126,7 @@ LDFLAGS = @LDFLAGS@
 LIBMATH = @LIBMATH@
 LIBOBJS = @LIBOBJS@
 LIBS = @LIBS@
+LIBTOOL = @LIBTOOL@
 LN_S = @LN_S@
 LTLIBOBJS = @LTLIBOBJS@
 MAINT = @MAINT@
@@ -130,6 +141,7 @@ PACKAGE_TARNAME = @PACKAGE_TARNAME@
 PACKAGE_VERSION = @PACKAGE_VERSION@
 PATH_SEPARATOR = @PATH_SEPARATOR@
 RANLIB = @RANLIB@
+SED = @SED@
 SET_MAKE = @SET_MAKE@
 SHELL = @SHELL@
 STRIP = @STRIP@
@@ -185,13 +197,13 @@ sysconfdir = @sysconfdir@
 target_alias = @target_alias@
 top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
-AM_CFLAGS = -I ../../type \
-		-I ../includes
+libSign_la_CFLAGS = -I $(top_builddir)/type \
+			-I $(top_builddir)/elementaryFunctions/includes \
+			-I $(top_builddir)/auxiliaryFunctions/includes
 
 instdir = $(top_builddir)/lib
-inst_LIBRARIES = libSign.a
-noinst_LIBRARIES = libSign.a
-libSign_a_SOURCES = $(HEAD) $(SRC)
+pkglib_LTLIBRARIES = libSign.la
+libSign_la_SOURCES = $(HEAD) $(SRC)
 SRC = ssigns.c \
 		dsigns.c \
 		csigns.c \
@@ -207,7 +219,8 @@ HEAD = ../includes/sign.h
 # Checking Part
 ####
 check_INCLUDES = -I $(top_builddir)/elementaryFunctions/includes \
-			-I $(top_builddir)/type
+			-I $(top_builddir)/type \
+			-I $(top_builddir)/auxiliaryFunctions/includes
 
 
 #
@@ -215,15 +228,17 @@ check_INCLUDES = -I $(top_builddir)/elementaryFunctions/includes \
 #
 testSign_SOURCES = testSign.c
 testSign_CFLAGS = $(check_INCLUDES)
-testSign_LDADD = $(top_builddir)/lib/libDoubleComplex.a \
-			$(top_builddir)/lib/libFloatComplex.a \
-			$(top_builddir)/lib/libSign.a \
+testSign_LDADD = $(top_builddir)/type/libDoubleComplex.la \
+			$(top_builddir)/type/libFloatComplex.la \
+			$(top_builddir)/elementaryFunctions/sqrt/libSqrt.la \
+			$(top_builddir)/auxiliaryFunctions/abs/libAbs.la \
+			$(top_builddir)/auxiliaryFunctions/sign/libSign.la \
 			@LIBMATH@
 
 all: all-am
 
 .SUFFIXES:
-.SUFFIXES: .c .o .obj
+.SUFFIXES: .c .lo .o .obj
 $(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am  $(am__configure_deps)
 	@for dep in $?; do \
 	  case '$(am__configure_deps)' in \
@@ -253,45 +268,42 @@ $(top_srcdir)/configure: @MAINTAINER_MODE_TRUE@ $(am__configure_deps)
 	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
 $(ACLOCAL_M4): @MAINTAINER_MODE_TRUE@ $(am__aclocal_m4_deps)
 	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
-install-instLIBRARIES: $(inst_LIBRARIES)
+install-pkglibLTLIBRARIES: $(pkglib_LTLIBRARIES)
 	@$(NORMAL_INSTALL)
-	test -z "$(instdir)" || $(MKDIR_P) "$(DESTDIR)$(instdir)"
-	@list='$(inst_LIBRARIES)'; for p in $$list; do \
+	test -z "$(pkglibdir)" || $(MKDIR_P) "$(DESTDIR)$(pkglibdir)"
+	@list='$(pkglib_LTLIBRARIES)'; for p in $$list; do \
 	  if test -f $$p; then \
 	    f=$(am__strip_dir) \
-	    echo " $(instLIBRARIES_INSTALL) '$$p' '$(DESTDIR)$(instdir)/$$f'"; \
-	    $(instLIBRARIES_INSTALL) "$$p" "$(DESTDIR)$(instdir)/$$f"; \
-	  else :; fi; \
-	done
-	@$(POST_INSTALL)
-	@list='$(inst_LIBRARIES)'; for p in $$list; do \
-	  if test -f $$p; then \
-	    p=$(am__strip_dir) \
-	    echo " $(RANLIB) '$(DESTDIR)$(instdir)/$$p'"; \
-	    $(RANLIB) "$(DESTDIR)$(instdir)/$$p"; \
+	    echo " $(LIBTOOL) --mode=install $(pkglibLTLIBRARIES_INSTALL) $(INSTALL_STRIP_FLAG) '$$p' '$(DESTDIR)$(pkglibdir)/$$f'"; \
+	    $(LIBTOOL) --mode=install $(pkglibLTLIBRARIES_INSTALL) $(INSTALL_STRIP_FLAG) "$$p" "$(DESTDIR)$(pkglibdir)/$$f"; \
 	  else :; fi; \
 	done
 
-uninstall-instLIBRARIES:
+uninstall-pkglibLTLIBRARIES:
 	@$(NORMAL_UNINSTALL)
-	@list='$(inst_LIBRARIES)'; for p in $$list; do \
+	@list='$(pkglib_LTLIBRARIES)'; for p in $$list; do \
 	  p=$(am__strip_dir) \
-	  echo " rm -f '$(DESTDIR)$(instdir)/$$p'"; \
-	  rm -f "$(DESTDIR)$(instdir)/$$p"; \
+	  echo " $(LIBTOOL) --mode=uninstall rm -f '$(DESTDIR)$(pkglibdir)/$$p'"; \
+	  $(LIBTOOL) --mode=uninstall rm -f "$(DESTDIR)$(pkglibdir)/$$p"; \
 	done
 
-clean-instLIBRARIES:
-	-test -z "$(inst_LIBRARIES)" || rm -f $(inst_LIBRARIES)
-
-clean-noinstLIBRARIES:
-	-test -z "$(noinst_LIBRARIES)" || rm -f $(noinst_LIBRARIES)
-libSign.a: $(libSign_a_OBJECTS) $(libSign_a_DEPENDENCIES) 
-	-rm -f libSign.a
-	$(libSign_a_AR) libSign.a $(libSign_a_OBJECTS) $(libSign_a_LIBADD)
-	$(RANLIB) libSign.a
+clean-pkglibLTLIBRARIES:
+	-test -z "$(pkglib_LTLIBRARIES)" || rm -f $(pkglib_LTLIBRARIES)
+	@list='$(pkglib_LTLIBRARIES)'; for p in $$list; do \
+	  dir="`echo $$p | sed -e 's|/[^/]*$$||'`"; \
+	  test "$$dir" != "$$p" || dir=.; \
+	  echo "rm -f \"$${dir}/so_locations\""; \
+	  rm -f "$${dir}/so_locations"; \
+	done
+libSign.la: $(libSign_la_OBJECTS) $(libSign_la_DEPENDENCIES) 
+	$(libSign_la_LINK) -rpath $(pkglibdir) $(libSign_la_OBJECTS) $(libSign_la_LIBADD) $(LIBS)
 
 clean-checkPROGRAMS:
-	-test -z "$(check_PROGRAMS)" || rm -f $(check_PROGRAMS)
+	@list='$(check_PROGRAMS)'; for p in $$list; do \
+	  f=`echo $$p|sed 's/$(EXEEXT)$$//'`; \
+	  echo " rm -f $$p $$f"; \
+	  rm -f $$p $$f ; \
+	done
 testSign$(EXEEXT): $(testSign_OBJECTS) $(testSign_DEPENDENCIES) 
 	@rm -f testSign$(EXEEXT)
 	$(testSign_LINK) $(testSign_OBJECTS) $(testSign_LDADD) $(LIBS)
@@ -302,15 +314,15 @@ mostlyclean-compile:
 distclean-compile:
 	-rm -f *.tab.c
 
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/csigna.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/csigns.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dsigna.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dsigns.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ssigna.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ssigns.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libSign_la-csigna.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libSign_la-csigns.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libSign_la-dsigna.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libSign_la-dsigns.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libSign_la-ssigna.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libSign_la-ssigns.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libSign_la-zsigna.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libSign_la-zsigns.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/testSign-testSign.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/zsigna.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/zsigns.Po@am__quote@
 
 .c.o:
 @am__fastdepCC_TRUE@	$(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $<
@@ -326,6 +338,69 @@ distclean-compile:
 @AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
 @am__fastdepCC_FALSE@	$(COMPILE) -c `$(CYGPATH_W) '$<'`
 
+.c.lo:
+@am__fastdepCC_TRUE@	$(LTCOMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $<
+@am__fastdepCC_TRUE@	mv -f $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='$<' object='$@' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(LTCOMPILE) -c -o $@ $<
+
+libSign_la-ssigns.lo: ssigns.c
+@am__fastdepCC_TRUE@	$(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(libSign_la_CFLAGS) $(CFLAGS) -MT libSign_la-ssigns.lo -MD -MP -MF $(DEPDIR)/libSign_la-ssigns.Tpo -c -o libSign_la-ssigns.lo `test -f 'ssigns.c' || echo '$(srcdir)/'`ssigns.c
+@am__fastdepCC_TRUE@	mv -f $(DEPDIR)/libSign_la-ssigns.Tpo $(DEPDIR)/libSign_la-ssigns.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='ssigns.c' object='libSign_la-ssigns.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(libSign_la_CFLAGS) $(CFLAGS) -c -o libSign_la-ssigns.lo `test -f 'ssigns.c' || echo '$(srcdir)/'`ssigns.c
+
+libSign_la-dsigns.lo: dsigns.c
+@am__fastdepCC_TRUE@	$(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(libSign_la_CFLAGS) $(CFLAGS) -MT libSign_la-dsigns.lo -MD -MP -MF $(DEPDIR)/libSign_la-dsigns.Tpo -c -o libSign_la-dsigns.lo `test -f 'dsigns.c' || echo '$(srcdir)/'`dsigns.c
+@am__fastdepCC_TRUE@	mv -f $(DEPDIR)/libSign_la-dsigns.Tpo $(DEPDIR)/libSign_la-dsigns.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='dsigns.c' object='libSign_la-dsigns.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(libSign_la_CFLAGS) $(CFLAGS) -c -o libSign_la-dsigns.lo `test -f 'dsigns.c' || echo '$(srcdir)/'`dsigns.c
+
+libSign_la-csigns.lo: csigns.c
+@am__fastdepCC_TRUE@	$(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(libSign_la_CFLAGS) $(CFLAGS) -MT libSign_la-csigns.lo -MD -MP -MF $(DEPDIR)/libSign_la-csigns.Tpo -c -o libSign_la-csigns.lo `test -f 'csigns.c' || echo '$(srcdir)/'`csigns.c
+@am__fastdepCC_TRUE@	mv -f $(DEPDIR)/libSign_la-csigns.Tpo $(DEPDIR)/libSign_la-csigns.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='csigns.c' object='libSign_la-csigns.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(libSign_la_CFLAGS) $(CFLAGS) -c -o libSign_la-csigns.lo `test -f 'csigns.c' || echo '$(srcdir)/'`csigns.c
+
+libSign_la-zsigns.lo: zsigns.c
+@am__fastdepCC_TRUE@	$(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(libSign_la_CFLAGS) $(CFLAGS) -MT libSign_la-zsigns.lo -MD -MP -MF $(DEPDIR)/libSign_la-zsigns.Tpo -c -o libSign_la-zsigns.lo `test -f 'zsigns.c' || echo '$(srcdir)/'`zsigns.c
+@am__fastdepCC_TRUE@	mv -f $(DEPDIR)/libSign_la-zsigns.Tpo $(DEPDIR)/libSign_la-zsigns.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='zsigns.c' object='libSign_la-zsigns.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(libSign_la_CFLAGS) $(CFLAGS) -c -o libSign_la-zsigns.lo `test -f 'zsigns.c' || echo '$(srcdir)/'`zsigns.c
+
+libSign_la-ssigna.lo: ssigna.c
+@am__fastdepCC_TRUE@	$(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(libSign_la_CFLAGS) $(CFLAGS) -MT libSign_la-ssigna.lo -MD -MP -MF $(DEPDIR)/libSign_la-ssigna.Tpo -c -o libSign_la-ssigna.lo `test -f 'ssigna.c' || echo '$(srcdir)/'`ssigna.c
+@am__fastdepCC_TRUE@	mv -f $(DEPDIR)/libSign_la-ssigna.Tpo $(DEPDIR)/libSign_la-ssigna.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='ssigna.c' object='libSign_la-ssigna.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(libSign_la_CFLAGS) $(CFLAGS) -c -o libSign_la-ssigna.lo `test -f 'ssigna.c' || echo '$(srcdir)/'`ssigna.c
+
+libSign_la-dsigna.lo: dsigna.c
+@am__fastdepCC_TRUE@	$(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(libSign_la_CFLAGS) $(CFLAGS) -MT libSign_la-dsigna.lo -MD -MP -MF $(DEPDIR)/libSign_la-dsigna.Tpo -c -o libSign_la-dsigna.lo `test -f 'dsigna.c' || echo '$(srcdir)/'`dsigna.c
+@am__fastdepCC_TRUE@	mv -f $(DEPDIR)/libSign_la-dsigna.Tpo $(DEPDIR)/libSign_la-dsigna.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='dsigna.c' object='libSign_la-dsigna.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(libSign_la_CFLAGS) $(CFLAGS) -c -o libSign_la-dsigna.lo `test -f 'dsigna.c' || echo '$(srcdir)/'`dsigna.c
+
+libSign_la-csigna.lo: csigna.c
+@am__fastdepCC_TRUE@	$(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(libSign_la_CFLAGS) $(CFLAGS) -MT libSign_la-csigna.lo -MD -MP -MF $(DEPDIR)/libSign_la-csigna.Tpo -c -o libSign_la-csigna.lo `test -f 'csigna.c' || echo '$(srcdir)/'`csigna.c
+@am__fastdepCC_TRUE@	mv -f $(DEPDIR)/libSign_la-csigna.Tpo $(DEPDIR)/libSign_la-csigna.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='csigna.c' object='libSign_la-csigna.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(libSign_la_CFLAGS) $(CFLAGS) -c -o libSign_la-csigna.lo `test -f 'csigna.c' || echo '$(srcdir)/'`csigna.c
+
+libSign_la-zsigna.lo: zsigna.c
+@am__fastdepCC_TRUE@	$(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(libSign_la_CFLAGS) $(CFLAGS) -MT libSign_la-zsigna.lo -MD -MP -MF $(DEPDIR)/libSign_la-zsigna.Tpo -c -o libSign_la-zsigna.lo `test -f 'zsigna.c' || echo '$(srcdir)/'`zsigna.c
+@am__fastdepCC_TRUE@	mv -f $(DEPDIR)/libSign_la-zsigna.Tpo $(DEPDIR)/libSign_la-zsigna.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='zsigna.c' object='libSign_la-zsigna.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(libSign_la_CFLAGS) $(CFLAGS) -c -o libSign_la-zsigna.lo `test -f 'zsigna.c' || echo '$(srcdir)/'`zsigna.c
+
 testSign-testSign.o: testSign.c
 @am__fastdepCC_TRUE@	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(testSign_CFLAGS) $(CFLAGS) -MT testSign-testSign.o -MD -MP -MF $(DEPDIR)/testSign-testSign.Tpo -c -o testSign-testSign.o `test -f 'testSign.c' || echo '$(srcdir)/'`testSign.c
 @am__fastdepCC_TRUE@	mv -f $(DEPDIR)/testSign-testSign.Tpo $(DEPDIR)/testSign-testSign.Po
@@ -340,6 +415,12 @@ testSign-testSign.obj: testSign.c
 @AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
 @am__fastdepCC_FALSE@	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(testSign_CFLAGS) $(CFLAGS) -c -o testSign-testSign.obj `if test -f 'testSign.c'; then $(CYGPATH_W) 'testSign.c'; else $(CYGPATH_W) '$(srcdir)/testSign.c'; fi`
 
+mostlyclean-libtool:
+	-rm -f *.lo
+
+clean-libtool:
+	-rm -rf .libs _libs
+
 ID: $(HEADERS) $(SOURCES) $(LISP) $(TAGS_FILES)
 	list='$(SOURCES) $(HEADERS) $(LISP) $(TAGS_FILES)'; \
 	unique=`for i in $$list; do \
@@ -491,9 +572,9 @@ check-am: all-am
 	$(MAKE) $(AM_MAKEFLAGS) $(check_PROGRAMS)
 	$(MAKE) $(AM_MAKEFLAGS) check-TESTS
 check: check-am
-all-am: Makefile $(LIBRARIES)
+all-am: Makefile $(LTLIBRARIES)
 installdirs:
-	for dir in "$(DESTDIR)$(instdir)"; do \
+	for dir in "$(DESTDIR)$(pkglibdir)"; do \
 	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
 	done
 install: install-am
@@ -522,8 +603,8 @@ maintainer-clean-generic:
 	@echo "it deletes files that may require special tools to rebuild."
 clean: clean-am
 
-clean-am: clean-checkPROGRAMS clean-generic clean-instLIBRARIES \
-	clean-noinstLIBRARIES mostlyclean-am
+clean-am: clean-checkPROGRAMS clean-generic clean-libtool \
+	clean-pkglibLTLIBRARIES mostlyclean-am
 
 distclean: distclean-am
 	-rm -rf ./$(DEPDIR)
@@ -541,11 +622,11 @@ info: info-am
 
 info-am:
 
-install-data-am: install-instLIBRARIES
+install-data-am:
 
 install-dvi: install-dvi-am
 
-install-exec-am:
+install-exec-am: install-pkglibLTLIBRARIES
 
 install-html: install-html-am
 
@@ -566,7 +647,8 @@ maintainer-clean-am: distclean-am maintainer-clean-generic
 
 mostlyclean: mostlyclean-am
 
-mostlyclean-am: mostlyclean-compile mostlyclean-generic
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
 
 pdf: pdf-am
 
@@ -576,23 +658,24 @@ ps: ps-am
 
 ps-am:
 
-uninstall-am: uninstall-instLIBRARIES
+uninstall-am: uninstall-pkglibLTLIBRARIES
 
 .MAKE: install-am install-strip
 
 .PHONY: CTAGS GTAGS all all-am check check-TESTS check-am clean \
-	clean-checkPROGRAMS clean-generic clean-instLIBRARIES \
-	clean-noinstLIBRARIES ctags distclean distclean-compile \
-	distclean-generic distclean-tags distdir dvi dvi-am html \
-	html-am info info-am install install-am install-data \
-	install-data-am install-dvi install-dvi-am install-exec \
-	install-exec-am install-html install-html-am install-info \
-	install-info-am install-instLIBRARIES install-man install-pdf \
-	install-pdf-am install-ps install-ps-am install-strip \
-	installcheck installcheck-am installdirs maintainer-clean \
-	maintainer-clean-generic mostlyclean mostlyclean-compile \
-	mostlyclean-generic pdf pdf-am ps ps-am tags uninstall \
-	uninstall-am uninstall-instLIBRARIES
+	clean-checkPROGRAMS clean-generic clean-libtool \
+	clean-pkglibLTLIBRARIES ctags distclean distclean-compile \
+	distclean-generic distclean-libtool distclean-tags distdir dvi \
+	dvi-am html html-am info info-am install install-am \
+	install-data install-data-am install-dvi install-dvi-am \
+	install-exec install-exec-am install-html install-html-am \
+	install-info install-info-am install-man install-pdf \
+	install-pdf-am install-pkglibLTLIBRARIES install-ps \
+	install-ps-am install-strip installcheck installcheck-am \
+	installdirs maintainer-clean maintainer-clean-generic \
+	mostlyclean mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool pdf pdf-am ps ps-am tags uninstall \
+	uninstall-am uninstall-pkglibLTLIBRARIES
 
 # Tell versions [3.59,3.63) of GNU make to not export all variables.
 # Otherwise a system limit (for SysV at least) may be exceeded.
diff --git a/src/auxiliaryFunctions/sign/csigna.c b/src/auxiliaryFunctions/sign/csigna.c
index c1e5e50d..478b4689 100644
--- a/src/auxiliaryFunctions/sign/csigna.c
+++ b/src/auxiliaryFunctions/sign/csigna.c
@@ -1,24 +1,21 @@
 /*
-**  -*- C -*-
-**
-** csigna.c
-** Made by  Bruno JOFRET <bruno.jofret@inria.fr>
-**
-** Started on  Fri Sep  7 17:36:56 2007 bruno
-** Last update Fri Sep  7 17:37:15 2007 bruno
-**
-** Copyright INRIA 2007
-*/
+ *  Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
+ *  Copyright (C) 2008-2008 - INRIA - Bruno JOFRET
+ *
+ *  This file must be used under the terms of the CeCILL.
+ *  This source file is licensed as described in the file COPYING, which
+ *  you should have received as part of this distribution.  The terms
+ *  are also available at
+ *  http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
+ *
+ */
 
 #include "sign.h"
 
-int csigna(floatComplex *in, int size) {
+void csigna(floatComplex *in, int size, floatComplex *out) {
   int i = 0;
-  int sign = 1;
 
-  /* FIXME : Does it what it's supposed to do ? */
   for (i = 0 ; i < size ; ++i) {
-    sign = sign * csigns(in[i]);
+   out[i] = csigns(in[i]);
   }
-  return sign;
 }
diff --git a/src/auxiliaryFunctions/sign/csigns.c b/src/auxiliaryFunctions/sign/csigns.c
index 9590e4bf..218314ab 100644
--- a/src/auxiliaryFunctions/sign/csigns.c
+++ b/src/auxiliaryFunctions/sign/csigns.c
@@ -1,18 +1,18 @@
 /*
-**  -*- C -*-
-**
-** csigns.c
-** Made by  Bruno JOFRET <bruno.jofret@inria.fr>
-**
-** Started on  Fri Sep  7 16:56:47 2007 bruno
-** Last update Fri Sep  7 17:29:18 2007 bruno
-**
-** Copyright INRIA 2007
-*/
+ *  Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
+ *  Copyright (C) 2007-2008 - INRIA - Bruno JOFRET
+ *
+ *  This file must be used under the terms of the CeCILL.
+ *  This source file is licensed as described in the file COPYING, which
+ *  you should have received as part of this distribution.  The terms
+ *  are also available at
+ *  http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
+ *
+ */
 
 #include "sign.h"
+#include "abs.h"
 
-int csigns(floatComplex in) {
-  /* FIXME : Dummy ...*/
-  return -1;
+floatComplex csigns(floatComplex in) {
+  return FloatComplex(creals(in) / cabss(in), cimags(in) / cabss(in));
 }
diff --git a/src/auxiliaryFunctions/sign/dsigna.c b/src/auxiliaryFunctions/sign/dsigna.c
index b72bbb9c..49e66144 100644
--- a/src/auxiliaryFunctions/sign/dsigna.c
+++ b/src/auxiliaryFunctions/sign/dsigna.c
@@ -1,25 +1,22 @@
 /*
-**  -*- C -*-
-**
-** dsigna.c
-** Made by  Bruno JOFRET <bruno.jofret@inria.fr>
-**
-** Started on  Fri Sep  7 17:35:44 2007 bruno
-** Last update Fri Sep  7 17:36:15 2007 bruno
-**
-** Copyright INRIA 2007
-*/
+ *  Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
+ *  Copyright (C) 2007-2008 - INRIA - Bruno JOFRET
+ *
+ *  This file must be used under the terms of the CeCILL.
+ *  This source file is licensed as described in the file COPYING, which
+ *  you should have received as part of this distribution.  The terms
+ *  are also available at
+ *  http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
+ *
+ */
 
 #include "sign.h"
 
-int dsigna(double *in, int size) {
+void dsigna(double *in, int size, double *out) {
   int i = 0;
-  int sign = 1;
 
-  /* FIXME : Does it what it's supposed to do ? */
   for (i = 0 ; i < size ; ++i) {
-    sign = sign * dsigns(in[i]);
+    out[i] = dsigns(in[i]);
   }
-  return sign;
 }
 
diff --git a/src/auxiliaryFunctions/sign/dsigns.c b/src/auxiliaryFunctions/sign/dsigns.c
index 99735e87..0715d537 100644
--- a/src/auxiliaryFunctions/sign/dsigns.c
+++ b/src/auxiliaryFunctions/sign/dsigns.c
@@ -1,20 +1,24 @@
 /*
-**  -*- C -*-
-**
-** ssigns.c
-** Made by  Bruno JOFRET <bruno.jofret@inria.fr>
-**
-** Started on  Thu Feb  8 10:26:22 2007 jofret
-** Last update Thu Feb  8 15:58:44 2007 jofret
-**
-** Copyright INRIA 2007
-*/
+ *  Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
+ *  Copyright (C) 2007-2008 - INRIA - Bruno JOFRET
+ *
+ *  This file must be used under the terms of the CeCILL.
+ *  This source file is licensed as described in the file COPYING, which
+ *  you should have received as part of this distribution.  The terms
+ *  are also available at
+ *  http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
+ *
+ */
 
 #include "sign.h"
 
 int dsigns(double num) {
-  if (num >= 0) {
+  if (num > 0) {
     return 1;
   }
-  return -1;
+  if (num < 0) {
+    return -1;
+  }
+  /* num == 0 */
+  return 0;
 }
diff --git a/src/auxiliaryFunctions/sign/ssigna.c b/src/auxiliaryFunctions/sign/ssigna.c
index 5926e99d..44f8cf4a 100644
--- a/src/auxiliaryFunctions/sign/ssigna.c
+++ b/src/auxiliaryFunctions/sign/ssigna.c
@@ -1,24 +1,21 @@
 /*
-**  -*- C -*-
-**
-** ssigna.c
-** Made by  Bruno JOFRET <bruno.jofret@inria.fr>
-**
-** Started on  Fri Sep  7 17:30:57 2007 bruno
-** Last update Fri Sep  7 17:35:32 2007 bruno
-**
-** Copyright INRIA 2007
-*/
+ *  Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
+ *  Copyright (C) 2007-2008 - INRIA - Bruno JOFRET
+ *
+ *  This file must be used under the terms of the CeCILL.
+ *  This source file is licensed as described in the file COPYING, which
+ *  you should have received as part of this distribution.  The terms
+ *  are also available at
+ *  http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
+ *
+ */
 
 #include "sign.h"
 
-int ssigna(float *in, int size) {
+void ssigna(float *in, int size, float *out) {
   int i = 0;
-  int sign = 1;
 
-  /* FIXME : Does it what it's supposed to do ? */
   for (i = 0 ; i < size ; ++i) {
-    sign = sign * ssigns(in[i]);
+   out[i] = ssigns(in[i]);
   }
-  return sign;
 }
diff --git a/src/auxiliaryFunctions/sign/ssigns.c b/src/auxiliaryFunctions/sign/ssigns.c
index 0bb21833..f79d1a1a 100644
--- a/src/auxiliaryFunctions/sign/ssigns.c
+++ b/src/auxiliaryFunctions/sign/ssigns.c
@@ -1,20 +1,24 @@
 /*
-**  -*- C -*-
-**
-** ssigns.c
-** Made by  Bruno JOFRET <bruno.jofret@inria.fr>
-**
-** Started on  Thu Feb  8 10:26:22 2007 jofret
-** Last update Thu Feb  8 15:58:54 2007 jofret
-**
-** Copyright INRIA 2007
-*/
+ *  Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
+ *  Copyright (C) 2007-2008 - INRIA - Bruno JOFRET
+ *
+ *  This file must be used under the terms of the CeCILL.
+ *  This source file is licensed as described in the file COPYING, which
+ *  you should have received as part of this distribution.  The terms
+ *  are also available at
+ *  http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
+ *
+ */
 
 #include "sign.h"
 
 int ssigns(float num) {
-  if (num >= 0) {
+  if (num > 0) {
     return 1;
   }
-  return -1;
+  if (num < 0) {
+    return -1;
+  }
+  /* num == 0 */
+  return 0;
 }
diff --git a/src/auxiliaryFunctions/sign/testSign.c b/src/auxiliaryFunctions/sign/testSign.c
new file mode 100644
index 00000000..b3d77d72
--- /dev/null
+++ b/src/auxiliaryFunctions/sign/testSign.c
@@ -0,0 +1,97 @@
+/*
+ *  Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
+ *  Copyright (C) 2008-2008 - INRIA - Bruno JOFRET
+ *
+ *  This file must be used under the terms of the CeCILL.
+ *  This source file is licensed as described in the file COPYING, which
+ *  you should have received as part of this distribution.  The terms
+ *  are also available at
+ *  http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
+ *
+ */
+
+/*
+** FIXME : Add some array tests !
+*/
+
+#include "testSign.h"
+
+int ssignsTest() {
+
+  float positive = 0.123;
+  float negative = -0.123;
+  float zero = 0;
+
+  printf(">> Float \n");
+  assert(ssigns(positive) == 1);
+  assert(ssigns(negative) == -1);
+  assert(ssigns(zero) == 0);
+  return 0;
+}
+
+int dsignsTest() {
+
+  double positive = 0.123;
+  double negative = -0.123;
+  double zero = 0;
+
+  printf(">> Double\n");
+  assert(dsigns(positive) == 1);
+  assert(dsigns(negative) == -1);
+  assert(dsigns(zero) == 0);
+  return 0;
+}
+
+int csignsTest() {
+
+  floatComplex i = FloatComplex(0., 1.);
+  floatComplex oneAndI = FloatComplex(1., 1.);
+  floatComplex sign_i = csigns(i);
+  floatComplex sign_oneAndI =  csigns(oneAndI);
+
+  printf(">> Float Complex\n");
+  /* sign(%i) = %i */
+  assert(creals(sign_i) == 0);
+  assert(cimags(sign_i) == 1);
+  /* sign(1+%i) = (1+%i) / sqrt(2) */
+  assert(creals(sign_oneAndI) == 1 / sqrtf(2));
+  assert(cimags(sign_oneAndI) == 1 / sqrtf(2));
+
+  return 0;
+}
+
+int zsignsTest() {
+  doubleComplex i = DoubleComplex(0., 1.);
+  doubleComplex oneAndI = DoubleComplex(1., 1.);
+  doubleComplex sign_i = zsigns(i);
+  doubleComplex sign_oneAndI =  zsigns(oneAndI);
+
+  printf(">> Double Complex\n");
+  /* sign(%i) = %i */
+  assert(zreals(sign_i) == 0);
+  assert(zimags(sign_i) == 1);
+  /* sign(1+%i) = (1+%i) / sqrt(2) */
+  assert(zreals(sign_oneAndI) == sqrt(2) / 2);
+  assert(zimags(sign_oneAndI) == 1 / sqrt(2));
+
+  return 0;
+}
+
+
+int testSign() {
+  int ssignsTestStatus, dsignsTestStatus = 0;
+  int csignsTestStatus, zsignsTestStatus = 0;
+  printf("\n>>>> Sign Tests\n");
+  ssignsTestStatus = ssignsTest();
+  dsignsTestStatus = dsignsTest();
+  csignsTestStatus = csignsTest();
+  zsignsTestStatus = zsignsTest();
+
+  return (ssignsTestStatus + dsignsTestStatus +
+	  csignsTestStatus + zsignsTestStatus);
+}
+
+int main(void) {
+  assert(testSign() == 0);
+  return 0;
+}
diff --git a/src/auxiliaryFunctions/sign/testSign.h b/src/auxiliaryFunctions/sign/testSign.h
new file mode 100644
index 00000000..214f28eb
--- /dev/null
+++ b/src/auxiliaryFunctions/sign/testSign.h
@@ -0,0 +1,30 @@
+/*
+ *  Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
+ *  Copyright (C) 2008-2008 - INRIA - Bruno JOFRET
+ *
+ *  This file must be used under the terms of the CeCILL.
+ *  This source file is licensed as described in the file COPYING, which
+ *  you should have received as part of this distribution.  The terms
+ *  are also available at
+ *  http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
+ *
+ */
+
+#ifndef __TESTSIGN_H__
+#define __TESTSIGN_H__
+
+#include <stdio.h>
+#include <assert.h>
+#include "sign.h"
+
+int ssignsTest(void);
+
+int dsignsTest(void);
+
+int csignsTest(void);
+
+int zsignsTest(void);
+
+int testSign(void);
+
+#endif /* ! __TESTSIGN_H__ */
diff --git a/src/auxiliaryFunctions/sign/zsigna.c b/src/auxiliaryFunctions/sign/zsigna.c
index cb6c13b7..eafbfbbf 100644
--- a/src/auxiliaryFunctions/sign/zsigna.c
+++ b/src/auxiliaryFunctions/sign/zsigna.c
@@ -1,24 +1,21 @@
 /*
-**  -*- C -*-
-**
-** zsigna.c
-** Made by  Bruno JOFRET <bruno.jofret@inria.fr>
-**
-** Started on  Fri Sep  7 17:38:11 2007 bruno
-** Last update Fri Sep  7 17:38:36 2007 bruno
-**
-** Copyright INRIA 2007
-*/
+ *  Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
+ *  Copyright (C) 2007-2008 - INRIA - Bruno JOFRET
+ *
+ *  This file must be used under the terms of the CeCILL.
+ *  This source file is licensed as described in the file COPYING, which
+ *  you should have received as part of this distribution.  The terms
+ *  are also available at
+ *  http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
+ *
+ */
 
 #include "sign.h"
 
-int zsigna(doubleComplex *in, int size) {
+void zsigna(doubleComplex *in, int size, doubleComplex *out) {
   int i = 0;
-  int sign = 1;
 
-  /* FIXME : Does it what it's supposed to do ? */
   for (i = 0 ; i < size ; ++i) {
-    sign = sign * zsigns(in[i]);
+    out[i] = zsigns(in[i]);
   }
-  return sign;
 }
diff --git a/src/auxiliaryFunctions/sign/zsigns.c b/src/auxiliaryFunctions/sign/zsigns.c
index ae1a960c..397cc33a 100644
--- a/src/auxiliaryFunctions/sign/zsigns.c
+++ b/src/auxiliaryFunctions/sign/zsigns.c
@@ -1,18 +1,18 @@
 /*
-**  -*- C -*-
-**
-** zsigns.c
-** Made by  Bruno JOFRET <bruno.jofret@inria.fr>
-**
-** Started on  Fri Sep  7 17:29:33 2007 bruno
-** Last update Fri Sep  7 17:30:33 2007 bruno
-**
-** Copyright INRIA 2007
-*/
+ *  Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
+ *  Copyright (C) 2007-2008 - INRIA - Bruno JOFRET
+ *
+ *  This file must be used under the terms of the CeCILL.
+ *  This source file is licensed as described in the file COPYING, which
+ *  you should have received as part of this distribution.  The terms
+ *  are also available at
+ *  http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
+ *
+ */
 
 #include "sign.h"
+#include "abs.h"
 
-int zsigns(doubleComplex in) {
-/* FIXME : Dummy... */
-  return -1;
+doubleComplex zsigns(doubleComplex in) {
+  return DoubleComplex(zreals(in) / zabss(in), zimags(in) / zabss(in));
 }