Program Database Toolkit (PDT)

**********************************************************************

Program Database (PDB) Format

    Items                    ID      attribute
			   prefix     prefix
    HEADER
    FILES                    so          s
    ROUTINES                 ro          r
    GROUPS                   gr          g
    TYPES (non-groups)       ty          y
    TEMPLATES                te          t
    NAMESPACES               na          n
    MACROS                   ma          m

Prototype format for each item:
* Each line is of the form:  attribute value value...
* Attributes and values are separated by exactly one space (" ")
* Item description blocks are terminated by an empty line
* Values which are references to other items are done using IDs
* Values are never enclosed in ""
* Attributes with boolean value are only listed if true (value == T)
  i.e. absence means false
* String "[...]" after attribute means "0 or more" instances of this
  attribute line possible

**********************************************************************

HEADER Item

<PDB 2.0>
lang		< c|c++|c_or_c++|fortran
		|java|multi>			     # parser language

**********************************************************************

SOURCE FILE Item

so#[fileID]	<filename (absolute path)>
ssys		<boolean>			     # is system include? (c/c++)
sinc [...]	<included_fileID>		     # IDs of included files

**********************************************************************

ROUTINE Item

ro#[routineID]  <name_of_routine>
rloc		<fileID> <line> <column>	     # location
[
rgroup		<groupID>			     # parent group
racs		<pub|prot|priv>			     # access
  OR
rnspace		<namespaceID>			     # parent namespace
  OR
rroutine	<routineID>			     # parent routine (f90)
racs		<pub|priv>			     # access (f90)
  OR
racs		<pub|priv>			     # access for interfaces (f90)
]
ralias		<routineID>			     # alias (via interface) (f90)
rsig		<typeID>                             # signature
rlink		<no|internal|C++|C|fint|f90>         # linkage
rkind		<ext|stat|auto|NA|asm|tproto	     # storage class
		|fext|fprog|fbldat|fintrin	     # (f90)
		|fint|fstfn|fmproc|funspec	     # (f90)
		|falias>			     # (f90)
rimpl [...]	<routineID>			     # for "rkind falias" (f90)
rstatic		<boolean>			     # is static function?
rskind		<ctor|dtor|conv|op>		     # special kind
rvirt		<no|virt|pure>                       # virtuality
rcrvo		<boolean>                            # is covariant return
						     # virtual override?
rinline		<boolean>			     # is inline?
rcgen		<boolean>                            # is compiler generated?
rexpl		<boolean>                            # is explicit ctor?
rtempl		<templateID>			     # ID if template instance;
rspecl		<boolean>                            # is specialized?
rarginfo	<boolean>			     # explicit interface defined? (f90)
rrec		<boolean>			     # is declared recursive? (f90)
riselem		<boolean>			     # is elemental? (f90)
rstart		<fileID> <line> <column>	     # location of first
						     # executable statement (f90)
rcall [...]	<routineID> <no|virt> <fileID> <line> <column>
						     # callees
rret [...]	<fileID> <line> <column>	     # location of return
rstop [...]	<fileID> <line> <column>	     # location of stop (f90)
rpos		<start_of_return_type> <last_token_before_"{"> <"{"> <"}">

**********************************************************************

GROUP Item

gr#[groupID] 	<name_of_group>
gloc		<fileID> <line> <column>	     # location
[
ggroup		<groupID>			     # parent group
gacs		<pub|prot|priv>			     # access
  OR
gnspace		<namespaceID>			     # parent namespace
]
gkind		<class|struct|union|tproto	     # kind
		|fderived|fmodule>		     # (f90)
gtempl		<templateID>			     # template ID
gspecl		<boolean>                            # is specialized?
gsparam [...]	<type> <typeID|groupID>		     # specialization
		OR <ntype> <constant>		     # template arguments
		OR <templ> <templateID>
gbase [...]	<virt|no> <NA|pub|prot|priv> <direct base groupID>
		  <fileID> <line> <column>
						     # direct base groups
gfrgroup [...]  <groupID> <fileID> <line> <column>   # friend groups
gfrfunc [...]	<routineID> <fileID> <line> <column> # friend functions
gfunc [...]	<member_routineID> <fileID> <line> <column>
						     # member functions
gmem [...]	<name_of_non-function_member>	     # other members
  gmloc		<fileID> <line> <column>	     # location
  gmgroup	<groupID>			     # parent group (f90) 
  gmacs		<pub|prot|priv>			     # access
  gmkind	<type|statvar|var|templ>	     # kind:  type or group,
						     # static or non-static
						     # variable, template
  [
  if (gmkind == type):
  gmtype	<typeID|groupID>		     # type of member

  if (gmkind == statvar):
  gmtype	<typeID|groupID>		     # type of member
  gmtempl	<templateID>			     # ID if template static
						     # data member
  gmspecl	<boolean>			     # is specialized?
  gmconst	<boolean>			     # was initializer
						     # specified at its
						     # declaration within the
						     # group definition?

  if (gmkind == var):
  gmtype	<typeID|groupID>		     # type of member
  gmisbit	<boolean>                            # is bit field?
  gmmut		<boolean>			     # is mutable?
  gmconst	<boolean>			     # is constant? (f90)

  if (gmkind == templ):
  gmtempl	<templateID>			     # template ID
  ]
gpos		<group_token> <last_token_before_"{"> <"{"> <"};">

**********************************************************************

TYPE Item

ty#[typeID]	<name_of_type>
yloc		<fileID> <line> <column>	     # location
[
ygroup		<groupID>			     # parent group
yacs		<pub|prot|priv>			     # access
  OR
ynspace		<namespaceID>			     # parent namespace
  OR
yacs		<pub|priv>			     # access (f90)
]
ykind		<err|void|int|float|ptr|ref|func     # kind
		|array|tref|ptrmem|tparam
		|enum|wchar|bool
		|ferr|fvoid|fint|flogic|ffloat	     # (f90)
		|ffunc|fchar|farray|fcmplx	     # (f90)
		|funspecfunc|fbldat|fmod|fptr	     # (f90)
		|NA

[
if (ykind == int|enum|wchar|bool|fint|flogic|fchar):
yikind		<char|schar|uchar|wchar		     # integer kind
		|short|ushort|int|uint
		|long|ulong|longlong|ulonglong>
ysigned		<boolean>			     # is explicitly signed?

if (ykind == enum):
yenum [...]	<name1> <value1>                     # name-value pairs

if (ykind == fchar):				     # (f90)
yclen		<number_of_characters>		     # *: unspecified
						     # else constant

if (ykind == float|ffloat|fcmplx):
yfkind		<float|dbl|longdbl>		     # float kind

if (ykind == ptr|fptr):
yptr		<typeID|groupID>		     # type pointed to

if (ykind == ref):
yref		<typeID|groupID>		     # type referred to

if (ykind == func|ffunc):
yrett		<typeID|groupID>		     # return type
yargt [...]	<typeID|groupID> <-|name> <def|in|out|opt>*
						     # argument type
						     # argument name
						     # has default value?
						     # intent in? (f90)
						     # intent out? (f90)
						     # is optional? (f90)
yellip          <boolean>			     # has ellipsis?
yqual		<const>				     # qualifier
yexcep [...]	<typeID|groupID>		     # absence of attribute
						     # indicates any exception
						     # may be thrown;
						     # NULL indicates no excep-
						     # tions will be thrown

if (ykind == array):
yelem		<typeID|groupID>		     # type of array element
ystat		<boolean>			     # (C99) is static?  i.e.,
						     # is array tagged with C99
						     # keyword "static"?
ynelem		<number_of_elements>		     # -2: template dependent size array;
						     # -1: variable length array;
						     # 0: [] incomplete-type case;
						     # else number of elements

if (ykind == farray):				     # (f90)
yelem		<typeID|groupID>		     # type of array element
yshape		<explicit|asmdsize|asmdshape	     # shape of array
		|deferred>
yrank		<number_of_dimensions>		     # number of dimensions
ydim [...]	<lower_bound> <upper_bound>	     # bounds of dimensions
						     # *: if upper bound for asmdsize;
						     # NA: if not constant;
						     # else constant value

if (ykind == tref):
ytref		<typeID|groupID>		     # typedef type
yqual		<const|volatile|restrict>*	     # qualifiers

if (ykind == ptrmem):
ympgroup  	<groupID>			     # type of group to which
						     # member pointed to belongs
ymptype		<typeID|groupID>		     # type of member pointed to
]

**********************************************************************

TEMPLATE Item

te#[templateID] <name_of_template>
tloc		<fileID> <line> <column>	     # location
[
tgroup          <groupID>			     # parent group
tacs            <pub|prot|priv>			     # access
  OR
tnspace		<namespaceID>			     # parent namespace
]
tdecl		<templateID>			     # declaration of template,
						     # if not current template
tdef		<templateID>			     # definition of template,
						     # if not current template
tkind		<none|class|func|memfunc	     # kind
		|statmem|memclass|ttparam>
tparam [...]	<type> <typeID> <default typeID|groupID, if any>
		OR <ntype> <typeID> <-|name> <default value, if any>
		OR <templ> <templateID> <default templateID, if any>
						     # template parameters
tsparam [...]	<type> <typeID|groupID>		     # partial specialization
		OR <ntype> <constant>		     # template parameters
		OR <templ> <templateID>

if (ykind == func|memfunc):
tproto		<routineID>			     # prototype instantiation

if (ykind == class|memclass):
tproto		<groupID>			     # prototype instantiation

if (ykind == statmem):
ttype		<typeID|groupID>		     # variable type

ttext		<string_giving_text_of_template>     # text of template
tpos		<template_token> <">"> <start_of_template> <"}">

**********************************************************************

NAMESPACE Item

na#[namespaceID]	<name_of_namespace>
nloc		<fileID> <line> <column>	     # location
nnspace		<parent_namespaceID>		     # parent namespace
nmem [...]	<typeID|routineID|groupID	     # IDs of members
		|templateID|namespaceID>
nalias		<alias_name>			     # alias of namespace
npos		<namespace_token> <last_token_before_"{"> <"{"> <"}">

**********************************************************************

MACRO Item

ma#[macroID] 	<name_of_macro>
mloc		<fileID> <line> <column>	     # location
mkind		<def|undef>			     # kind
mtext		<string_giving_text_of_macro>	     # text of macro

**********************************************************************

NOTES AND CAVEATS:

To eliminate unneeded (C++) entities, add the EDG option 
"--remove_unneeded_entities" to the cxxparse command line. 

ROUTINE rpos, GROUP gpos, TEMPLATE tpos, NAMESPACE npos:
* Positions have form <fileID> <line> <column>
* Position 1 corresponds to the first 3 values, position 2 to the
  next 3 values, etc.
* Location of the header is given by the first 2 positions, location
  of the body by the last 2 positions.
* A value of "NULL 0 0" indicates an unknown position.
* Tab characters are counted as a single column.

ROUTINE rcall:
* The values for rcall will be NULL 0 0, if the routine calling (e.g. some
  constructors) or being called (e.g. implicit conversions) is compiler
  generated.
* Some positions are not ideal (but the best that can be done):
  ctor/dtor calls associated with "new"/"delete", 
  dtor calls within dtors for derived classes,
  new/ctor calls associated with return statements,
  positions associated with macros.
* Destructor calls are often reported with the corresponding constructor
  calls; this is for exception handling.

ROUTINE rpos:
* For unused member functions of instantiated template classes, the
  header positions are known, but not the body positions.
* For unused constructors of instantiated template classes, position 2
  will not reflect the constructor initializers.
* Fortran 90: only first position is available in IL.

ROUTINE:
Fortran 90 ENTRY statement is not handled.

GROUP gpos:
* C++: If position 2 is null, then the class is a typedef having the form:
    typedef struct { . . . };
* C++: Position 3 cannot be determined for non-template classes and speciali-
  zations; it is not given in the IL.
* C++: In cases where positions 3 and 4 are null -- i.e. the class corresponds
  to a template declaration rather than a definition -- position 2 will not
  reflect base classes, if there are any.  This is the best that
  can be done given the structure of the IL.
* Fortran 90: No positions are available in IL.

TEMPLATE tspecl:
* For a specialized class template, it would be nice to know
  the class template that it is a specialization of, i.e.
  a "tspecl te#xx" attribute would be nice.
  (The IL does not provide needed information.)

TEMPLATE tpos:
* Position 2 is unknown in IL.
* For tkind ttparam, only position 1 is known.
* For tkind memfunc and statmem, only positions 3 and 4 are known
  for definitions, whereas no positions are known for declarations.

NAMESPACE npos:
* The positions for a namespace pertain to the first encountered segment
  of a namespace.
* Position 1 is unknown in IL.
* Position 2 is known in IL only for named namespaces.
* Position 3 is known in IL only for unnamed namespaces.
* Position 4 is unknown in IL for namespace aliases.

IL Analyzer (bin/taucpdisp):
* Routine calls using pointers to functions are not currently reported.
  The function signature can be determined without difficulty; what else can
  be determined is not known at this time.  See emails on "C++ function calls"
  from Kathie and Bernd, and ptrToFunc.c example. (1/20/00)
 
DUCTAPE application bin/pdbmerge:
* Namespace definitions spread over several files are not merged correctly.

DUCTAPE application bin/pdbtree:
* Class hierarchy is a DAG, not a tree, and therefore display is bad.

Possible enhancements:
* Last comment block before routines, classes, templates, ...
* Full symbol information
  * type
  * location where defined
  * locations where used
* Pragmas?

**********************************************************************

CHANGE LOG:

************************************

Change date: September 21, 2000, klindlan

ALL:
group[ID] (renamed from "class[ID]")

ROUTINE:
rgroup (renamed from "rclass")
(rroutine + racs) OR racs (added for f90)
ralias (added for f90)
rlink ("fint", "f90" values added for f90)
rkind (renamed from "rstore", values added for f90)
rimpl (added for f90)
rskind (renamed from "rkind")
rstart (added for f90)
rreturn (added for f90)
rstop (added for f90)
rpos (only first position is available in IL for f90)

GROUP (previously known as CLASS):
all attributes ('cl' -> 'gr', 'c' -> 'g')
ggroup (renamed from "cclass")
gkind ("fderived", "fmodule" values added for f90)
gfrgroup (renamed from "cfrclass")
under gmem:
  gmgroup (added for f90; needed to handle "USE" within module)
  if (gmkind == var):
    gmconst (added for f90)
gpos (no positions are available in IL for f90)

TYPE:
ygroup (renamed from "yclass")
yacs (occurrence without "ygroup" added for f90)
ykind (values added for f90)
if (ykind == fint|flogic|fchar):
  yikind ("wchar" value added for f90)
if (ykind == fchar):
  yclen (added for f90)
if (ykind == ffloat|fcmplx):
  (added for f90)
if (ykind == fptr):
  (added for f90)
if (ykind == func|ffunc):
  ("ffunc" added for f90)
  yarginfo, yrec, yiselem (added for f90)
  yargt ("name" value added; "in," "out," "opt" values added for f90; 
  boolean converted to "def")
if (ykind == farray):
  yelem, yshape, yrank, ydim (added for f90)
if (ykind == ptrmem):
  ympgroup (renamed from "ympclass")

TEMPLATE:
tgroup (renamed from "tclass")

NOTES AND CAVEATS:
ROUTINE rpos, GROUP gpos (added comments for f90)
Fortran 90 ENTRY statement is not handled

CHANGE LOG:
Old entries deleted

************************************

Change date: March 13, 2001, klindlan

OTHER:
Updated C++ IL Analyzer to reflect changes for CLASS->GROUP
Deleted various out-of-date comments

SOURCE FILE:
ssys (added for C++)

ROUTINE:
rimpl (added "[...]")
rtempl (values include templateID and boolean)
rtarg (added for C++)
rarginfo, rrec, riselem (added for f90)
rret (name changed from "rreturn", added for C++)

GROUP:
gtempl (values include templateID and boolean)
gtarg (added for C++)
gsarg (added for C++)
gfunc (corrected so that location is displayed)
gmem gmkind (added "templ" value)
if (gmkind == templ):
  gmtempl (added for C++)

TYPE:
if (ykind == enum):
  yenum (changed format to hex without leading 0s)
if (ykind == func|ffunc):
  yargt (added "-" in case an argument name is not given)
  yarginfo, yrec, yiselem (deleted for f90)
if (ykind == array);
  ynelem (value is "-2" for template dependent size array)

TEMPLATE:
tkind (added value "ttparam" for template template parameters)
tparam, tproto, ttype (added for C++)

************************************

Change date: March 23, 2001, klindlan

ROUTINE:
rkind (added tproto for C++)
rtempl (deleted boolean)
rtarg (deleted)

GROUP:
gkind (added tproto for C++)
gtempl (deleted boolean)
gtarg (deleted)
gsparam (renamed from gsarg)

TEMPLATE:
tparam (defaults are now optional IDs or values)

************************************

Change date: May 16, 2001, klindlan

Integrated PDT with EDG v. 2.45

ROUTINE:
rcatch (added)
rpos (accommodates EDG changes in handling of templates/instantiations
  and exceptions)

GROUP:
gtempl (reports definition template, if possible)
gsparam (modified ntype value)
gpos (reports location of definition template, when appropriate)

TYPE:
if (ykind == array):
  ystat (added for C99)

TEMPLATE:
tdecl (added)
tdef (added)
tsparam (added)
tpos (not complete)

************************************

Change date: June 6, 2001, klindlan

TEMPLATE:
tloc (modified)
tpos (completed implementation, added notes)

************************************

Change date: July 6, 2001, klindlan

ROUTINE:
rcatch (deleted)

GROUP:
gmem (extraneous template entries are no longer reported)

TYPE:
yqual (fixed so that qualifiers are reported for functions)

************************************

Change date: September 25, 2001, klindlan

Deleted out-of-date notes, caveats, issues. 

************************************

Issues List:

* CHECK attribute names -- for F90-related changes (class -> group, etc.)

* "use" hierarchy is not reported explicitly.

* With modules, routines can be represented by two PDB entries, one for an
  internal routine, the other for a module procedure.  The only connection
  between the two is "rloc" entries having the same location.

* Items from a module accessed via "USE" are not listed under the corresponding
  group entry.  The IL does not list members of such a module.

* (Kathie, 2/16/01)  Could not find use of "tpck_template_ref" with test cases 
  pdtoolkit-IRIX64/test/template/t*.cc.  Will have to check for these when
  testing with POOMA, etc.  (Look for "a_template_arg" in il_def.h.)

* (KL, 3/21/01) Check output for yenum on all architectures.
  INTEGER_VALUE_REPR_IS_A_HOST_INTEGER is 1 on all architectures  (?)
  LINUX at least does not work properly: it reports
  "Internal error: check_target_config: an_integer_value is too small"
  If value is set to 0, then output for yenum is, e.g., "0x0x00000000000a."

* (KL, 4/19/01) Added another filter to disp_class_type_scope() so that template
  instantiations are not reported as class members.
    if ((type_ptr->kind == tk_array
	 || type_ptr->kind == tk_class
	 || type_ptr->kind == tk_union)
	&& type_ptr->variant.class_struct_union.is_template_class)
      continue;
  Make sure this is right.

************************************************************

(Bernd, 1/29/01 and 1/30/01)

For the following:

subroutine bar()
  print *, "bar"
end subroutine bar 

program xx   
  interface foo
    subroutine bar()
    end subroutine bar 
  end interface     

  call foo()
end program xx   

As I understand it rimpl/ralias comes as a pair. If ro#1
has ralias#2 then ro#2 has rimpl#1. It actually works for your intv*.f90
test cases. But in my xx.f90 test case I sent you, only "rimpl" shows up,
but not "ralias". One difference I noted is that in the intv.f90 test case
the interfaces are within a module, in my test case it is not.

kal -- I investigated -- and couldn't see the connection in the IL -- except at
a routine call.  Looks like something is wrong with the IL.

*************
