Files
gcc/libga68/ga68.h
Jose E. Marchesi e22f1657bc a68: standard Algol 68 preludes in Algol 68
This big commit:

* Adds support to the FFI mechanism to map Algol 68 procedures
  returning strings to an equivalent C interface.

* Adds a new command-line option -fbuilding-libga68.

* Adds support for having modules in libga68 implicitly invoked in
  user-written programs and modules.

* Using the infrastructure agove, removes the compiler-generated glue
  to call the standard POSIX prelude shipped in libga68 to, instead, use
  the formal holes mechanism for FFI.

* Adds posix.a68 to libga68.

* Adds standard.a68 to libga68.

Signed-off-by: Jose E. Marchesi <jemarch@gnu.org>

gcc/algol68/ChangeLog

	* a68-moids-misc.cc (a68_is_c_mode): Allow C formal holes for
	routines yielding strings.
	* a68-low-holes.cc (a68_wrap_formal_proc_hole): Support wrappers
	that yield strings.
	* a68.h: Remove a68_posix_* and a68_lower_posix* prototypes.
	* a68-low-posix.cc: Remove.
	* a68-imports.cc (a68_open_packet): Get argument filename.
	* Make-lang.in (ALGOL68_OBJS): Remove algol68/a68-low-posix.o.
	* a68-low-runtime.def: Remove POSIX_*.
	* lang.opt (-fcheck): Add new undocumented option -fbuilding-libga68.
	* a68-parser-prelude.cc (stand_transput): New function.
	(posix_prelude): Remove hardcoded additions to the top-level
	environment and use a68_extract_revelations instead.
	* a68-parser-extract.cc (a68_extract_revelation): Renamed from
	extract_revelation and made accessible externally.
	* a68-low.cc (a68_make_formal_hole_decl): Remove unneeded check.
	(lower_lude_decl): New function.
	(lower_module_text): Add calls to preludes and postludes of
	standard modules if not building libga68.
	(a68_lower_particular_program): Likewise.
	* a68-low-prelude.cc (a68_lower_posixargc): Remove.
	(a68_lower_posixargv): Likewise.
	(a68_lower_posixgetenv): Likewise.
	(a68_lower_posixputchar): Likewise.
	(a68_lower_posixputs): Likewise.
	(a68_lower_posixfconnect): Likewise.
	(a68_lower_posixfopen): Likewise.
	(a68_lower_posixfcreate): Likewise.
	(a68_lower_posixfclose): Likewise.
	(a68_lower_posixfsize): Likewise.
	(a68_lower_posixlseek): Likewise.
	(a68_lower_posixseekcur): Likewise.
	(a68_lower_posixseekend): Likewise.
	(a68_lower_posixseekset): Likewise.
	(a68_lower_posixstdinfiledes): Likewise.
	(a68_lower_posixstdoutfiledes): Likewise.
	(a68_lower_posixstderrfiledes): Likewise.
	(a68_lower_posixfileodefault): Likewise.
	(a68_lower_posixfileordwr): Likewise.
	(a68_lower_posixfileordonly): Likewise.
	(a68_lower_posixfileowronly): Likewise.
	(a68_lower_posixfileotrunc): Likewise.
	(a68_lower_posixerrno): Likewise.
	(a68_lower_posixexit): Likewise.
	(a68_lower_posixperror): Likewise.
	(a68_lower_posixstrerror): Likewise.
	(a68_lower_posixfputc): Likewise.
	(a68_lower_posixfputs): Likewise.
	(a68_lower_posixgetchar): Likewise.
	(a68_lower_posixfgetc): Likewise.
	(a68_lower_posixgets): Likewise.
	(a68_lower_posixfgets): Likewise.

gcc/testsuite/ChangeLog

	* lib/algol68.exp (algol68_init): Add -I options to
	ALGOL68_UNDER_TEST so exports in libga68.{a,so} are found.
	* algol68/compile/warning-hidding-6.a68: Likewise.
	* algol68/compile/warning-hidding-5.a68: Use maxint instead of
	getchar to trigger the warning.
	* algol68/compile/error-nest-4.a68: Procedures yielding strings
	are now on in C formal holes.

libga68/ChangeLog

	* posix.a68: New file.
	* standard.a68.in: Likewise.
	* ga68-posix.c (_libga68_stdin): Define.
	(_libga68_stdout): Likewise.
	(_libga68_stderr): Likewise.
	(_libga68_file_o_default): Likewise.
	(_libga68_file_o_rdonly): Likewise.
	(_libga68_file_o_rdwr): Likewise.
	(_libga68_file_o_trunc): Likewise.
	(_libga68_seek_cur): Likewise.
	(_libga68_seek_end): Likewise.
	(_libga68_seek_set): Likewise.
	(_libga68_posixstrerror): Update interface to new way of returning
	Algol 68 strings.
	(_libga68_posixargv): Likewise.
	(_libga68_posixfgets): Likewise.
	(_libga68_posixgets): Likewise.
	(_libga68_posixfopen): Use _libga68_file_o_default rather than FILE_O_DEFAULT.
	(_libga68_posixfopen): Ditto for other FILE_O_* values.
	* ga68.h: Update prototypes.
	* Makefile.am (libga68_la_LIBADD): Add standard.lo.
	(libga68_la_DEPENDENCIES): Likeise.
	(.a68.o): Pass -fbuilding-libga68.
	(.a68.lo): Likewise.
	(standard.a68): New rule.
	* Makefile.in: Regenerate.
	* transput.a68.in: Add Emacs -*- mode: a68 -*- comment.
2026-02-21 20:07:23 +01:00

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C

/* Definitions for libga68.
Copyright (C) 2025 Jose E. Marchesi.
GCC is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
details.
Under Section 7 of GPL version 3, you are granted additional permissions
described in the GCC Runtime Library Exception, version 3.1, as published by
the Free Software Foundation.
You should have received a copy of the GNU General Public License and a copy
of the GCC Runtime Library Exception along with this program; see the files
COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef GA68_H
#define GA68_H
#include "config.h"
#include <stddef.h> /* For size_t. */
#include <stdint.h>
#include <stdarg.h>
#ifdef __has_include
# if __has_include (<sys/types.h>)
# include <sys/types.h> /* For ssize_t. */
# endif
#endif
#ifdef HAVE_ATTRIBUTE_VISIBILITY
# define GA68_HIDDEN __attribute__ ((__visibility__ ("hidden")))
#else
# define GA68_HIDDEN
#endif
/* ga68-error.c */
void _libga68_abort (const char *fmt, ...)
GA68_HIDDEN
__attribute__ ((__format__ (__printf__, 1, 2), __nonnull__ (1),
__noreturn__));
void _libga68_assert (const char *filename, unsigned int lineno);
void _libga68_derefnil (const char *filename, unsigned int lineno);
void _libga68_invalidcharerror (const char *filename, unsigned int lineno,
int c);
void _libga68_bitsboundserror (const char *filename, unsigned int lineno,
ssize_t pos);
void _libga68_unreachable (const char *filename, unsigned int lineno);
void _libga68_lower_bound (const char *filename, unsigned int lineno,
ssize_t index, ssize_t lower_bound);
void _libga68_upper_bound (const char *filename, unsigned int lineno,
ssize_t index, ssize_t upper_bound);
void _libga68_bounds (const char *filename, unsigned int lineno,
ssize_t index, ssize_t lower_bound, ssize_t upper_bound);
void _libga68_dim (const char *filename, unsigned int lineno,
size_t dim, size_t index);
void _libga68_bounds_mismatch (const char *filename, unsigned int lineno,
size_t dim, ssize_t lb1, ssize_t ub1,
ssize_t lb2, ssize_t ub2);
/* ga68-alloc.c */
void _libga68_init_heap (void) GA68_HIDDEN;
void *_libga68_malloc (size_t size);
void *_libga68_malloc_leaf (size_t size);
void *_libga68_malloc_internal (size_t size) GA68_HIDDEN;
void *_libga68_realloc (void *ptr, size_t size) GA68_HIDDEN;
void *_libga68_realloc_internal (void *ptr, size_t size) GA68_HIDDEN;
void *_libga68_realloc_unchecked (void *ptr, size_t size) GA68_HIDDEN;
void _libga68_free_internal (void *ptr) GA68_HIDDEN;
/* ga68-standenv.c */
float _libga68_random (void);
double _libga68_longrandom (void);
long double _libga68_longlongrandom (void);
/* ga68-posix.c */
int _libga68_posixerrno (void);
void _libga68_posixexit (int) __attribute__ ((__noreturn__));
void _libga68_posixperror (uint32_t *s, size_t len, size_t stride);
void _libga68_posixstrerror (int errnum, uint32_t **r, size_t *rlen);
long long int _libga68_posixfsize (int fd);
int _libga68_posixfopen (const uint32_t *pathname, size_t len, size_t stride,
unsigned int flags);
int _libga68_posixcreat (uint32_t *pathname, size_t len, size_t stride, uint32_t mode);
int _libga68_posixclose (int fd);
int _libga68_posixargc (void);
void _libga68_posixargv (int n, uint32_t **r, size_t *rlen);
void _libga68_posixgetenv (uint32_t *s, size_t len, size_t stride,
uint32_t **r, size_t *rlen);
void _libga68_posixputs (uint32_t *s, size_t len, size_t stride);
uint32_t _libga68_posixputchar (uint32_t c);
uint32_t _libga68_posixfputc (int fd, uint32_t c);
int _libga68_posixfputs (int fd, uint32_t *s, size_t len, size_t stride);
uint32_t _libga68_posixgetchar (void);
uint32_t _libga68_posixfgetc (int fd);
void _libga68_posixfgets (int fd, int nchars, uint32_t **r, size_t *rlen);
void _libga68_posixgets (int nchars, uint32_t **r, size_t *rlen);
int _libga68_posixfconnect (uint32_t *str, size_t len, size_t stride,
int port);
long long int _libga68_posixlseek (int fd, long long int offset, int whence);
/* ga68-unistr.c */
int _libga68_u32_cmp2 (const uint32_t *s1, size_t n1, size_t stride1,
const uint32_t *s2, size_t n2, size_t stride2);
int _libga68_u8_uctomb (uint8_t *s, uint32_t uc, ptrdiff_t n) GA68_HIDDEN;
int _libga68_u8_mbtouc (uint32_t *puc, const uint8_t *s, size_t n) GA68_HIDDEN;
char *_libga68_u32_to_u8 (const uint32_t *s, size_t n, size_t stride,
size_t *lengthp) GA68_HIDDEN;
uint32_t *_libga68_u8_to_u32 (const uint8_t *s, size_t n,
uint32_t *resultbuf, size_t *lengthp);
/* libga68.c */
extern int _libga68_argc;
extern char **_libga68_argv;
#endif /* ! GA68_H */