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Diffstat (limited to 'libguile/strports.c')
-rw-r--r-- | libguile/strports.c | 285 |
1 files changed, 285 insertions, 0 deletions
diff --git a/libguile/strports.c b/libguile/strports.c new file mode 100644 index 000000000..1ba808a51 --- /dev/null +++ b/libguile/strports.c @@ -0,0 +1,285 @@ +/* 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 - string ports} + * + */ + +#ifdef __STDC__ +static int +prinstpt (SCM exp, SCM port, int writing) +#else +static int +prinstpt (exp, port, writing) + SCM exp; + SCM port; + int writing; +#endif +{ + scm_prinport (exp, port, "string"); + return !0; +} + +#ifdef __STDC__ +static int +stputc (int c, SCM p) +#else +static int +stputc (c, p) + int c; + SCM p; +#endif +{ + scm_sizet ind = SCM_INUM (SCM_CAR (p)); + SCM_DEFER_INTS; + if (ind >= SCM_LENGTH (SCM_CDR (p))) + scm_vector_set_length_x (SCM_CDR (p), SCM_MAKINUM (ind + (ind >> 1))); + SCM_ALLOW_INTS; + SCM_CHARS (SCM_CDR (p))[ind] = c; + SCM_CAR (p) = SCM_MAKINUM (ind + 1); + return c; +} + +#ifdef __STDC__ +static scm_sizet +stwrite (char *str, scm_sizet siz, scm_sizet num, SCM p) +#else +static scm_sizet +stwrite (str, siz, num, p) + char *str; + scm_sizet siz; + scm_sizet num; + SCM p; +#endif +{ + scm_sizet ind = SCM_INUM (SCM_CAR (p)); + scm_sizet len = siz * num; + char *dst; + SCM_DEFER_INTS; + if (ind + len >= SCM_LENGTH (SCM_CDR (p))) + scm_vector_set_length_x (SCM_CDR (p), SCM_MAKINUM (ind + len + ((ind + len) >> 1))); + SCM_ALLOW_INTS; + dst = &(SCM_CHARS (SCM_CDR (p))[ind]); + while (len--) + dst[len] = str[len]; + SCM_CAR (p) = SCM_MAKINUM (ind + siz * num); + return num; +} + +#ifdef __STDC__ +static int +stputs (char *s, SCM p) +#else +static int +stputs (s, p) + char *s; + SCM p; +#endif +{ + stwrite (s, 1, strlen (s), p); + return 0; +} + +#ifdef __STDC__ +static int +stgetc (SCM p) +#else +static int +stgetc (p) + SCM p; +#endif +{ + scm_sizet ind = SCM_INUM (SCM_CAR (p)); + if (ind >= SCM_ROLENGTH (SCM_CDR (p))) + return EOF; + SCM_CAR (p) = SCM_MAKINUM (ind + 1); + return SCM_ROUCHARS (SCM_CDR (p))[ind]; +} + +#ifdef __STDC__ +SCM +scm_mkstrport (SCM pos, SCM str, long modes, char * caller) +#else +SCM +scm_mkstrport (pos, str, modes, caller) + SCM pos; + SCM str; + long modes; + char * caller; +#endif +{ + SCM z; + SCM stream; + struct scm_port_table * pt; + + SCM_ASSERT(SCM_INUMP(pos) && SCM_INUM(pos) >= 0, pos, SCM_ARG1, caller); + SCM_ASSERT(SCM_NIMP(str) && SCM_ROSTRINGP(str), str, SCM_ARG1, caller); + stream = scm_cons(pos, str); + SCM_NEWCELL (z); + SCM_DEFER_INTS; + pt = scm_add_to_port_table (z); + SCM_CAR (z) = scm_tc16_strport | modes; + SCM_SETPTAB_ENTRY (z, pt); + SCM_SETSTREAM (z, stream); + SCM_ALLOW_INTS; + return z; +} + +SCM_PROC(s_call_with_output_string, "call-with-output-string", 1, 0, 0, scm_call_with_output_string); +#ifdef __STDC__ +SCM +scm_call_with_output_string (SCM proc) +#else +SCM +scm_call_with_output_string (proc) + SCM proc; +#endif +{ + SCM p; + p = scm_mkstrport(SCM_INUM0, scm_make_string(SCM_MAKINUM(30), SCM_UNDEFINED), + SCM_OPN | SCM_WRTNG, + s_call_with_output_string); + scm_apply (proc, p, scm_listofnull); + { + SCM answer; + SCM_DEFER_INTS; + answer = scm_makfromstr (SCM_CHARS (SCM_CDR (SCM_STREAM (p))), + SCM_INUM (SCM_CAR (SCM_STREAM (p))), + 0); + SCM_ALLOW_INTS; + return answer; + } +} + + + +/* Return a Scheme string obtained by printing a given object. + */ + +#ifdef __STDC__ +SCM +scm_strprint_obj (SCM obj) +#else +SCM +scm_strprint_obj (obj) + SCM obj; +#endif +{ + SCM str; + SCM port; + + str = scm_makstr (64, 0); + port = scm_mkstrport (SCM_MAKINUM (0), str, SCM_OPN | SCM_WRTNG, "scm_strprint_obj"); + scm_iprin1 (obj, port, 1); + { + SCM answer; + SCM_DEFER_INTS; + answer = scm_makfromstr (SCM_CHARS (SCM_CDR (SCM_STREAM (port))), + SCM_INUM (SCM_CAR (SCM_STREAM (port))), + 0); + SCM_ALLOW_INTS; + return answer; + } +} + + + + +SCM_PROC(s_call_with_input_string, "call-with-input-string", 2, 0, 0, scm_call_with_input_string); +#ifdef __STDC__ +SCM +scm_call_with_input_string (SCM str, SCM proc) +#else +SCM +scm_call_with_input_string (str, proc) + SCM str; + SCM proc; +#endif +{ + SCM p = scm_mkstrport(SCM_INUM0, str, SCM_OPN | SCM_RDNG, s_call_with_input_string); + return scm_apply (proc, p, scm_listofnull); +} + +#ifdef __STDC__ +static int +noop0 (FILE *stream) +#else +static int +noop0 (stream) + FILE *stream; +#endif +{ + return 0; +} + + +scm_ptobfuns scm_stptob = +{ + scm_markstream, + noop0, + prinstpt, + 0, + stputc, + stputs, + stwrite, + noop0, + stgetc, + 0 +}; + + +#ifdef __STDC__ +void +scm_init_strports (void) +#else +void +scm_init_strports () +#endif +{ +#include "strports.x" +} + |