ABNF with APG

ABNF-with-APG.session

$ git clone git://github.com/ldthomas/apg-6.3.git
$ cd apg-6.3
$ ./configure
$ make
$ cat <<EOF >>ref.abnf
> ref = component *("/" component)
> component = alphanum *(separator alphanum)
> alphanum = 1*(ALPHA / DIGIT)
> separator = "--" / "-" / "." / "_" / ":" / "@" / "+"
> ALPHA = %x41-5A / %x61-7A
> DIGIT = %x30-39
> EOF
$ ./apg /in:ref.abnf /C:ref
…
*** C parser generated
    ref.h
    ref.c
$ cat main.c
$ cat <<EOF >>main.c
> #include <stdio.h>
> #include "Apg.h"
> #include "ref.h"
>
> int main(void) {
>         apg_achar s[100];
>         fgets(s, 100, stdin);
>         void *parser = vpParserCtor(vpParserInit_ref, NULL);
>         vTraceCtor(parser);
>         apg_uint rc = uiParserSyntaxAnalysis(parser, RULE_REF_REF, s, strnlen(s, 100), NULL);
>         vTraceDtor(parser);
>         vParserDtor(parser);
>         if (rc) {
>                 printf("success\n");
>         } else {
>                 printf("failure\n");
>         }
>         return !rc;
> }
> EOF
$ cc -D_APG_CFG_TRACE -o ref main.c ref.c ApgLib/*.c -I ApgLib
$ echo -n foo/bar--baz | ./ref | grep ':M:.*component\|success\|failure'
   76:    3:  2:M:--RNM(component):3:foo
  210:   81:  2:M:--RNM(component):8:bar--baz
success
$ echo -n ~foo | ./ref | grep ':M:.*component\|success\|failure'
failure