diff options
Diffstat (limited to 'libguile/vports.c')
-rw-r--r-- | libguile/vports.c | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/libguile/vports.c b/libguile/vports.c new file mode 100644 index 000000000..dbb67cbfe --- /dev/null +++ b/libguile/vports.c @@ -0,0 +1,241 @@ +/* Copyright (C) 1995,1996 Free Software Foundation, Inc. + * + * This program 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 2, or (at your option) + * any later version. + * + * This program 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. + * + * You should have received a copy of the GNU General Public License + * along with this software; see the file COPYING. If not, write to + * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + * + * As a special exception, the Free Software Foundation gives permission + * for additional uses of the text contained in its release of GUILE. + * + * The exception is that, if you link the GUILE library with other files + * to produce an executable, this does not by itself cause the + * resulting executable to be covered by the GNU General Public License. + * Your use of that executable is in no way restricted on account of + * linking the GUILE library code into it. + * + * This exception does not however invalidate any other reasons why + * the executable file might be covered by the GNU General Public License. + * + * This exception applies only to the code released by the + * Free Software Foundation under the name GUILE. If you copy + * code from other Free Software Foundation releases into a copy of + * GUILE, as the General Public License permits, the exception does + * not apply to the code that you add in this way. To avoid misleading + * anyone as to the status of such modified files, you must delete + * this exception notice from them. + * + * If you write modifications of your own for GUILE, it is your choice + * whether to permit this exception to apply to your modifications. + * If you do not wish that, delete this exception notice. + */ + + +#include <stdio.h> +#include "_scm.h" + + + +/* {Ports - soft ports} + * + */ + + +#ifdef __STDC__ +static int +prinsfpt (SCM exp, SCM port, int writing) +#else +static int +prinsfpt (exp, port, writing) + SCM exp; + SCM port; + int writing; +#endif +{ + scm_prinport (exp, port, "soft"); + return !0; +} + +/* sfputc sfwrite sfputs sfclose + * are called within a SCM_SYSCALL. + * + * So we need to set errno to 0 before returning. sfflush + * may be called within a SCM_SYSCALL. So we need to set errno to 0 + * before returning. + */ + +#ifdef __STDC__ +static int +sfputc (int c, SCM p) +#else +static int +sfputc (c, p) + int c; + SCM p; +#endif +{ + scm_apply (SCM_VELTS (p)[0], SCM_MAKICHR (c), scm_listofnull); + errno = 0; + return c; +} + +#ifdef __STDC__ +static scm_sizet +sfwrite (char *str, scm_sizet siz, scm_sizet num, SCM p) +#else +static scm_sizet +sfwrite (str, siz, num, p) + char *str; + scm_sizet siz; + scm_sizet num; + SCM p; +#endif +{ + SCM sstr; + sstr = scm_makfromstr (str, siz * num, 0); + scm_apply (SCM_VELTS (p)[1], sstr, scm_listofnull); + errno = 0; + return num; +} + +#ifdef __STDC__ +static int +sfputs (char *s, SCM p) +#else +static int +sfputs (s, p) + char *s; + SCM p; +#endif +{ + sfwrite (s, 1, strlen (s), p); + return 0; +} + +#ifdef __STDC__ +static int +sfflush (SCM stream) +#else +static int +sfflush (stream) + SCM stream; +#endif +{ + SCM f = SCM_VELTS (stream)[2]; + if (SCM_BOOL_F == f) + return 0; + f = scm_apply (f, SCM_EOL, SCM_EOL); + errno = 0; + return SCM_BOOL_F == f ? EOF : 0; +} + +#ifdef __STDC__ +static int +sfgetc (SCM p) +#else +static int +sfgetc (p) + SCM p; +#endif +{ + SCM ans; + ans = scm_apply (SCM_VELTS (p)[3], SCM_EOL, SCM_EOL); + errno = 0; + if (SCM_FALSEP (ans) || SCM_EOF_VAL == ans) + return EOF; + SCM_ASSERT (SCM_ICHRP (ans), ans, SCM_ARG1, "getc"); + return SCM_ICHR (ans); +} + +#ifdef __STDC__ +static int +sfclose (SCM p) +#else +static int +sfclose (p) + SCM p; +#endif +{ + SCM f = SCM_VELTS (p)[4]; + if (SCM_BOOL_F == f) + return 0; + f = scm_apply (f, SCM_EOL, SCM_EOL); + errno = 0; + return SCM_BOOL_F == f ? EOF : 0; +} + + + +SCM_PROC(s_make_soft_port, "make-soft-port", 2, 0, 0, scm_make_soft_port); +#ifdef __STDC__ +SCM +scm_make_soft_port (SCM pv, SCM modes) +#else +SCM +scm_make_soft_port (pv, modes) + SCM pv; + SCM modes; +#endif +{ + struct scm_port_table * pt; + SCM z; + SCM_ASSERT (SCM_NIMP (pv) && SCM_VECTORP (pv) && 5 == SCM_LENGTH (pv), pv, SCM_ARG1, s_make_soft_port); + SCM_ASSERT (SCM_NIMP (modes) && SCM_STRINGP (modes), modes, SCM_ARG2, s_make_soft_port); + SCM_NEWCELL (z); + SCM_DEFER_INTS; + pt = scm_add_to_port_table (z); + SCM_CAR (z) = scm_tc16_sfport | scm_mode_bits (SCM_CHARS (modes)); + SCM_SETPTAB_ENTRY (z, pt); + SCM_SETSTREAM (z, pv); + SCM_ALLOW_INTS; + return z; +} + +#ifdef __STDC__ +static int +noop0 (FILE *stream) +#else +static int +noop0 (stream) + FILE *stream; +#endif +{ + return 0; +} + + +scm_ptobfuns scm_sfptob = +{ + scm_markstream, + noop0, + prinsfpt, + 0, + sfputc, + sfputs, + sfwrite, + sfflush, + sfgetc, + sfclose +}; + + +#ifdef __STDC__ +void +scm_init_vports (void) +#else +void +scm_init_vports () +#endif +{ +#include "vports.x" +} + |