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package t_bimap;
use strict;
use vars qw(@ISA);
require t_template;
require t_array;
@ISA=qw(t_template);
my @parms = qw(NAME LEFT RIGHT LEFTCMP RIGHTCMP LEFTPRINT RIGHTPRINT);
my %defaults = ();
my $headertemplate = "/*
* bidirectional mapping table, add-only
*
* Parameters:
* NAME
* LEFT, RIGHT - types
* LEFTCMP, RIGHTCMP - comparison functions
*
* Methods:
* int init() - nonzero is error code, if any possible
* long size()
* void foreach(int (*)(LEFT, RIGHT, void*), void*)
* int add(LEFT, RIGHT) - 0 = success, -1 = allocation failure
* const <RIGHT> *findleft(<LEFT>) - null iff not found
* const <LEFT> *findright(<RIGHT>)
* void destroy() - destroys container, doesn't delete elements
*
* initial implementation: flat array of (left,right) pairs
*/
struct <NAME>__pair {
<LEFT> l;
<RIGHT> r;
};
";
my $bodytemplate = join "", <DATA>;
sub new { # no args
my $self = {};
bless $self;
$self->init(\@parms, \%defaults, []);
return $self;
}
sub output {
my ($self, $fh) = @_;
my $a = new t_array;
$a->setparm("NAME", $self->{values}{"NAME"} . "__pairarray");
$a->setparm("TYPE", "struct " . $self->{values}{"NAME"} . "__pair");
print $fh "/* start of ", ref($self), " header template */\n";
print $fh $self->substitute($headertemplate);
print $fh "/* end of ", ref($self), " header template */\n";
$a->output($fh);
print $fh "/* start of ", ref($self), " body template */\n";
print $fh $self->substitute($bodytemplate);
print $fh "/* end of ", ref($self), " body template */\n";
}
1;
__DATA__
/* for use in cases where text substitutions may not work, like putting
"const" before a type that turns out to be "char *" */
typedef <LEFT> <NAME>__left_t;
typedef <RIGHT> <NAME>__right_t;
typedef struct {
<NAME>__pairarray a;
long nextidx;
} <NAME>;
static inline int
<NAME>_init (<NAME> *m)
{
m->nextidx = 0;
return <NAME>__pairarray_init (&m->a);
}
static inline long
<NAME>_size (<NAME> *m)
{
return <NAME>__pairarray_size (&m->a);
}
static inline void
<NAME>_foreach (<NAME> *m, int (*fn)(<LEFT>, <RIGHT>, void *), void *p)
{
long i, sz;
sz = m->nextidx;
for (i = 0; i < sz; i++) {
struct <NAME>__pair *pair;
pair = <NAME>__pairarray_getaddr (&m->a, i);
if ((*fn)(pair->l, pair->r, p) != 0)
break;
}
}
static inline int
<NAME>_add (<NAME> *m, <LEFT> l, <RIGHT> r)
{
long i, sz;
struct <NAME>__pair newpair;
int err;
sz = m->nextidx;
/* Make sure we're not duplicating. */
for (i = 0; i < sz; i++) {
struct <NAME>__pair *pair;
pair = <NAME>__pairarray_getaddr (&m->a, i);
assert ((*<LEFTCMP>)(l, pair->l) != 0);
if ((*<LEFTCMP>)(l, pair->l) == 0)
abort();
assert ((*<RIGHTCMP>)(r, pair->r) != 0);
if ((*<RIGHTCMP>)(r, pair->r) == 0)
abort();
}
newpair.l = l;
newpair.r = r;
if (sz >= LONG_MAX - 1)
return ENOMEM;
err = <NAME>__pairarray_grow (&m->a, sz+1);
if (err)
return err;
<NAME>__pairarray_set (&m->a, sz, newpair);
m->nextidx++;
return 0;
}
static inline const <NAME>__right_t *
<NAME>_findleft (<NAME> *m, <LEFT> l)
{
long i, sz;
sz = <NAME>_size (m);
for (i = 0; i < sz; i++) {
struct <NAME>__pair *pair;
pair = <NAME>__pairarray_getaddr (&m->a, i);
if ((*<LEFTCMP>)(l, pair->l) == 0)
return &pair->r;
}
return 0;
}
static inline const <NAME>__left_t *
<NAME>_findright (<NAME> *m, <RIGHT> r)
{
long i, sz;
sz = <NAME>_size (m);
for (i = 0; i < sz; i++) {
struct <NAME>__pair *pair;
pair = <NAME>__pairarray_getaddr (&m->a, i);
if ((*<RIGHTCMP>)(r, pair->r) == 0)
return &pair->l;
}
return 0;
}
struct <NAME>__printstat {
FILE *f;
int comma;
};
static inline int
<NAME>__printone (<LEFT> l, <RIGHT> r, void *p)
{
struct <NAME>__printstat *ps = p;
fprintf(ps->f, ps->comma ? ", (" : "(");
ps->comma = 1;
(*<LEFTPRINT>)(l, ps->f);
fprintf(ps->f, ",");
(*<RIGHTPRINT>)(r, ps->f);
fprintf(ps->f, ")");
return 0;
}
static inline void
<NAME>_printmap (<NAME> *m, FILE *f)
{
struct <NAME>__printstat ps;
ps.comma = 0;
ps.f = f;
fprintf(f, "(");
<NAME>_foreach (m, <NAME>__printone, &ps);
fprintf(f, ")");
}
static inline void
<NAME>_destroy (<NAME> *m)
{
<NAME>__pairarray_destroy (&m->a);
}
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