From: Richard W.M. Jones Date: Thu, 21 Oct 2010 12:59:36 +0000 (+0100) Subject: generator: Refactor code for Perl bindings. X-Git-Tag: 1.5.23~14 X-Git-Url: http://git.annexia.org/?a=commitdiff_plain;h=ea6209198026080a9d9e588283e83aa9c4e2f177;p=libguestfs.git generator: Refactor code for Perl bindings. This simplifies the code that generates the Perl bindings by removing repeated sections. --- diff --git a/generator/generator_perl.ml b/generator/generator_perl.ml index 3ff060b..020f1b2 100644 --- a/generator/generator_perl.ml +++ b/generator/generator_perl.ml @@ -242,134 +242,137 @@ clear_progress_callback (g) | Int64 n -> pr " int64_t %s;\n" n ) (snd style); - let do_cleanups () = - List.iter ( - function - | Pathname _ | Device _ | Dev_or_Path _ | String _ | OptString _ - | Bool _ | Int _ | Int64 _ - | FileIn _ | FileOut _ - | BufferIn _ | Key _ -> () - | StringList n | DeviceList n -> pr " free (%s);\n" n - ) (snd style) - in - - (* Code. *) + (* PREINIT section (local variable declarations). *) + pr "PREINIT:\n"; (match fst style with | RErr -> - pr "PREINIT:\n"; pr " int r;\n"; + | RInt _ + | RBool _ -> + pr " int r;\n"; + | RInt64 _ -> + pr " int64_t r;\n"; + | RConstString _ -> + pr " const char *r;\n"; + | RConstOptString _ -> + pr " const char *r;\n"; + | RString _ -> + pr " char *r;\n"; + | RStringList _ | RHashtable _ -> + pr " char **r;\n"; + pr " size_t i, n;\n"; + | RStruct (_, typ) -> + pr " struct guestfs_%s *r;\n" typ; + | RStructList (_, typ) -> + pr " struct guestfs_%s_list *r;\n" typ; + pr " size_t i;\n"; + pr " HV *hv;\n"; + | RBufferOut _ -> + pr " char *r;\n"; + pr " size_t size;\n"; + ); + + (* CODE or PPCODE section. PPCODE is used where we are + * returning void, or where we push the return value on the stack + * ourselves. Using CODE means we will manipulate RETVAL. + *) + (match fst style with + | RErr -> + pr " PPCODE:\n"; + | RInt n + | RBool n -> + pr " CODE:\n"; + | RInt64 n -> + pr " CODE:\n"; + | RConstString n -> + pr " CODE:\n"; + | RConstOptString n -> + pr " CODE:\n"; + | RString n -> + pr " CODE:\n"; + | RStringList n | RHashtable n -> + pr " PPCODE:\n"; + | RBufferOut n -> + pr " CODE:\n"; + | RStruct _ + | RStructList _ -> pr " PPCODE:\n"; - pr " r = guestfs_%s " name; - generate_c_call_args ~handle:"g" style; - pr ";\n"; - do_cleanups (); + ); + + (* The call to the C function. *) + pr " r = guestfs_%s " name; + generate_c_call_args ~handle:"g" style; + pr ";\n"; + + (* Cleanup any arguments. *) + List.iter ( + function + | Pathname _ | Device _ | Dev_or_Path _ | String _ | OptString _ + | Bool _ | Int _ | Int64 _ + | FileIn _ | FileOut _ + | BufferIn _ | Key _ -> () + | StringList n | DeviceList n -> pr " free (%s);\n" n + ) (snd style); + + (* Check return value for errors and return it if necessary. *) + (match fst style with + | RErr -> pr " if (r == -1)\n"; pr " croak (\"%%s\", guestfs_last_error (g));\n"; | RInt n | RBool n -> - pr "PREINIT:\n"; - pr " int %s;\n" n; - pr " CODE:\n"; - pr " %s = guestfs_%s " n name; - generate_c_call_args ~handle:"g" style; - pr ";\n"; - do_cleanups (); - pr " if (%s == -1)\n" n; + pr " if (r == -1)\n"; pr " croak (\"%%s\", guestfs_last_error (g));\n"; - pr " RETVAL = newSViv (%s);\n" n; + pr " RETVAL = newSViv (r);\n"; pr " OUTPUT:\n"; pr " RETVAL\n" | RInt64 n -> - pr "PREINIT:\n"; - pr " int64_t %s;\n" n; - pr " CODE:\n"; - pr " %s = guestfs_%s " n name; - generate_c_call_args ~handle:"g" style; - pr ";\n"; - do_cleanups (); - pr " if (%s == -1)\n" n; + pr " if (r == -1)\n"; pr " croak (\"%%s\", guestfs_last_error (g));\n"; - pr " RETVAL = my_newSVll (%s);\n" n; + pr " RETVAL = my_newSVll (r);\n"; pr " OUTPUT:\n"; pr " RETVAL\n" | RConstString n -> - pr "PREINIT:\n"; - pr " const char *%s;\n" n; - pr " CODE:\n"; - pr " %s = guestfs_%s " n name; - generate_c_call_args ~handle:"g" style; - pr ";\n"; - do_cleanups (); - pr " if (%s == NULL)\n" n; + pr " if (r == NULL)\n"; pr " croak (\"%%s\", guestfs_last_error (g));\n"; - pr " RETVAL = newSVpv (%s, 0);\n" n; + pr " RETVAL = newSVpv (r, 0);\n"; pr " OUTPUT:\n"; pr " RETVAL\n" | RConstOptString n -> - pr "PREINIT:\n"; - pr " const char *%s;\n" n; - pr " CODE:\n"; - pr " %s = guestfs_%s " n name; - generate_c_call_args ~handle:"g" style; - pr ";\n"; - do_cleanups (); - pr " if (%s == NULL)\n" n; + pr " if (r == NULL)\n"; pr " RETVAL = &PL_sv_undef;\n"; pr " else\n"; - pr " RETVAL = newSVpv (%s, 0);\n" n; + pr " RETVAL = newSVpv (r, 0);\n"; pr " OUTPUT:\n"; pr " RETVAL\n" | RString n -> - pr "PREINIT:\n"; - pr " char *%s;\n" n; - pr " CODE:\n"; - pr " %s = guestfs_%s " n name; - generate_c_call_args ~handle:"g" style; - pr ";\n"; - do_cleanups (); - pr " if (%s == NULL)\n" n; + pr " if (r == NULL)\n"; pr " croak (\"%%s\", guestfs_last_error (g));\n"; - pr " RETVAL = newSVpv (%s, 0);\n" n; - pr " free (%s);\n" n; + pr " RETVAL = newSVpv (r, 0);\n"; + pr " free (r);\n"; pr " OUTPUT:\n"; pr " RETVAL\n" | RStringList n | RHashtable n -> - pr "PREINIT:\n"; - pr " char **%s;\n" n; - pr " size_t i, n;\n"; - pr " PPCODE:\n"; - pr " %s = guestfs_%s " n name; - generate_c_call_args ~handle:"g" style; - pr ";\n"; - do_cleanups (); - pr " if (%s == NULL)\n" n; + pr " if (r == NULL)\n"; pr " croak (\"%%s\", guestfs_last_error (g));\n"; - pr " for (n = 0; %s[n] != NULL; ++n) /**/;\n" n; + pr " for (n = 0; r[n] != NULL; ++n) /**/;\n"; pr " EXTEND (SP, n);\n"; pr " for (i = 0; i < n; ++i) {\n"; - pr " PUSHs (sv_2mortal (newSVpv (%s[i], 0)));\n" n; - pr " free (%s[i]);\n" n; + pr " PUSHs (sv_2mortal (newSVpv (r[i], 0)));\n"; + pr " free (r[i]);\n"; pr " }\n"; - pr " free (%s);\n" n; + pr " free (r);\n"; | RStruct (n, typ) -> let cols = cols_of_struct typ in - generate_perl_struct_code typ cols name style n do_cleanups + generate_perl_struct_code typ cols name style n | RStructList (n, typ) -> let cols = cols_of_struct typ in - generate_perl_struct_list_code typ cols name style n do_cleanups + generate_perl_struct_list_code typ cols name style n | RBufferOut n -> - pr "PREINIT:\n"; - pr " char *%s;\n" n; - pr " size_t size;\n"; - pr " CODE:\n"; - pr " %s = guestfs_%s " n name; - generate_c_call_args ~handle:"g" style; - pr ";\n"; - do_cleanups (); - pr " if (%s == NULL)\n" n; + pr " if (r == NULL)\n"; pr " croak (\"%%s\", guestfs_last_error (g));\n"; - pr " RETVAL = newSVpvn (%s, size);\n" n; - pr " free (%s);\n" n; + pr " RETVAL = newSVpvn (r, size);\n"; + pr " free (r);\n"; pr " OUTPUT:\n"; pr " RETVAL\n" ); @@ -377,61 +380,45 @@ clear_progress_callback (g) pr "\n" ) all_functions -and generate_perl_struct_list_code typ cols name style n do_cleanups = - pr "PREINIT:\n"; - pr " struct guestfs_%s_list *%s;\n" typ n; - pr " size_t i;\n"; - pr " HV *hv;\n"; - pr " PPCODE:\n"; - pr " %s = guestfs_%s " n name; - generate_c_call_args ~handle:"g" style; - pr ";\n"; - do_cleanups (); - pr " if (%s == NULL)\n" n; +and generate_perl_struct_list_code typ cols name style n = + pr " if (r == NULL)\n"; pr " croak (\"%%s\", guestfs_last_error (g));\n"; - pr " EXTEND (SP, %s->len);\n" n; - pr " for (i = 0; i < %s->len; ++i) {\n" n; + pr " EXTEND (SP, r->len);\n"; + pr " for (i = 0; i < r->len; ++i) {\n"; pr " hv = newHV ();\n"; List.iter ( function | name, FString -> - pr " (void) hv_store (hv, \"%s\", %d, newSVpv (%s->val[i].%s, 0), 0);\n" - name (String.length name) n name + pr " (void) hv_store (hv, \"%s\", %d, newSVpv (r->val[i].%s, 0), 0);\n" + name (String.length name) name | name, FUUID -> - pr " (void) hv_store (hv, \"%s\", %d, newSVpv (%s->val[i].%s, 32), 0);\n" - name (String.length name) n name + pr " (void) hv_store (hv, \"%s\", %d, newSVpv (r->val[i].%s, 32), 0);\n" + name (String.length name) name | name, FBuffer -> - pr " (void) hv_store (hv, \"%s\", %d, newSVpvn (%s->val[i].%s, %s->val[i].%s_len), 0);\n" - name (String.length name) n name n name + pr " (void) hv_store (hv, \"%s\", %d, newSVpvn (r->val[i].%s, r->val[i].%s_len), 0);\n" + name (String.length name) name name | name, (FBytes|FUInt64) -> - pr " (void) hv_store (hv, \"%s\", %d, my_newSVull (%s->val[i].%s), 0);\n" - name (String.length name) n name + pr " (void) hv_store (hv, \"%s\", %d, my_newSVull (r->val[i].%s), 0);\n" + name (String.length name) name | name, FInt64 -> - pr " (void) hv_store (hv, \"%s\", %d, my_newSVll (%s->val[i].%s), 0);\n" - name (String.length name) n name + pr " (void) hv_store (hv, \"%s\", %d, my_newSVll (r->val[i].%s), 0);\n" + name (String.length name) name | name, (FInt32|FUInt32) -> - pr " (void) hv_store (hv, \"%s\", %d, newSVnv (%s->val[i].%s), 0);\n" - name (String.length name) n name + pr " (void) hv_store (hv, \"%s\", %d, newSVnv (r->val[i].%s), 0);\n" + name (String.length name) name | name, FChar -> - pr " (void) hv_store (hv, \"%s\", %d, newSVpv (&%s->val[i].%s, 1), 0);\n" - name (String.length name) n name + pr " (void) hv_store (hv, \"%s\", %d, newSVpv (&r->val[i].%s, 1), 0);\n" + name (String.length name) name | name, FOptPercent -> - pr " (void) hv_store (hv, \"%s\", %d, newSVnv (%s->val[i].%s), 0);\n" - name (String.length name) n name + pr " (void) hv_store (hv, \"%s\", %d, newSVnv (r->val[i].%s), 0);\n" + name (String.length name) name ) cols; pr " PUSHs (sv_2mortal (newRV ((SV *) hv)));\n"; pr " }\n"; - pr " guestfs_free_%s_list (%s);\n" typ n - -and generate_perl_struct_code typ cols name style n do_cleanups = - pr "PREINIT:\n"; - pr " struct guestfs_%s *%s;\n" typ n; - pr " PPCODE:\n"; - pr " %s = guestfs_%s " n name; - generate_c_call_args ~handle:"g" style; - pr ";\n"; - do_cleanups (); - pr " if (%s == NULL)\n" n; + pr " guestfs_free_%s_list (r);\n" typ + +and generate_perl_struct_code typ cols name style n = + pr " if (r == NULL)\n"; pr " croak (\"%%s\", guestfs_last_error (g));\n"; pr " EXTEND (SP, 2 * %d);\n" (List.length cols); List.iter ( @@ -440,31 +427,31 @@ and generate_perl_struct_code typ cols name style n do_cleanups = match col with | name, FString -> - pr " PUSHs (sv_2mortal (newSVpv (%s->%s, 0)));\n" - n name + pr " PUSHs (sv_2mortal (newSVpv (r->%s, 0)));\n" + name | name, FBuffer -> - pr " PUSHs (sv_2mortal (newSVpvn (%s->%s, %s->%s_len)));\n" - n name n name + pr " PUSHs (sv_2mortal (newSVpvn (r->%s, r->%s_len)));\n" + name name | name, FUUID -> - pr " PUSHs (sv_2mortal (newSVpv (%s->%s, 32)));\n" - n name + pr " PUSHs (sv_2mortal (newSVpv (r->%s, 32)));\n" + name | name, (FBytes|FUInt64) -> - pr " PUSHs (sv_2mortal (my_newSVull (%s->%s)));\n" - n name + pr " PUSHs (sv_2mortal (my_newSVull (r->%s)));\n" + name | name, FInt64 -> - pr " PUSHs (sv_2mortal (my_newSVll (%s->%s)));\n" - n name + pr " PUSHs (sv_2mortal (my_newSVll (r->%s)));\n" + name | name, (FInt32|FUInt32) -> - pr " PUSHs (sv_2mortal (newSVnv (%s->%s)));\n" - n name + pr " PUSHs (sv_2mortal (newSVnv (r->%s)));\n" + name | name, FChar -> - pr " PUSHs (sv_2mortal (newSVpv (&%s->%s, 1)));\n" - n name + pr " PUSHs (sv_2mortal (newSVpv (&r->%s, 1)));\n" + name | name, FOptPercent -> - pr " PUSHs (sv_2mortal (newSVnv (%s->%s)));\n" - n name + pr " PUSHs (sv_2mortal (newSVnv (r->%s)));\n" + name ) cols; - pr " free (%s);\n" n + pr " free (r);\n" (* Generate Sys/Guestfs.pm. *) and generate_perl_pm () =