mirror of
https://git.savannah.gnu.org/git/guile.git
synced 2025-05-02 21:10:27 +02:00
304 lines
6.9 KiB
C
304 lines
6.9 KiB
C
/* 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"
|
||
#include "unif.h"
|
||
#include "eval.h"
|
||
#include "read.h"
|
||
|
||
#include "strports.h"
|
||
|
||
#ifdef HAVE_STRING_H
|
||
#include <string.h>
|
||
#endif
|
||
|
||
|
||
|
||
/* {Ports - string ports}
|
||
*
|
||
*/
|
||
|
||
|
||
static int prinstpt SCM_P ((SCM exp, SCM port, scm_print_state *pstate));
|
||
|
||
static int
|
||
prinstpt (exp, port, pstate)
|
||
SCM exp;
|
||
SCM port;
|
||
scm_print_state *pstate;
|
||
{
|
||
scm_prinport (exp, port, "string");
|
||
return !0;
|
||
}
|
||
|
||
|
||
static int stputc SCM_P ((int c, SCM p));
|
||
|
||
static int
|
||
stputc (c, p)
|
||
int c;
|
||
SCM p;
|
||
{
|
||
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_SETCAR (p, SCM_MAKINUM (ind + 1));
|
||
return c;
|
||
}
|
||
|
||
|
||
static scm_sizet stwrite SCM_P ((char *str, scm_sizet siz, scm_sizet num, SCM p));
|
||
|
||
static scm_sizet
|
||
stwrite (str, siz, num, p)
|
||
char *str;
|
||
scm_sizet siz;
|
||
scm_sizet num;
|
||
SCM p;
|
||
{
|
||
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_SETCAR (p, SCM_MAKINUM (ind + siz * num));
|
||
return num;
|
||
}
|
||
|
||
|
||
static int stputs SCM_P ((char *s, SCM p));
|
||
|
||
static int
|
||
stputs (s, p)
|
||
char *s;
|
||
SCM p;
|
||
{
|
||
stwrite (s, 1, strlen (s), p);
|
||
return 0;
|
||
}
|
||
|
||
|
||
static int stgetc SCM_P ((SCM p));
|
||
|
||
static int
|
||
stgetc (p)
|
||
SCM p;
|
||
{
|
||
scm_sizet ind = SCM_INUM (SCM_CAR (p));
|
||
if (ind >= SCM_ROLENGTH (SCM_CDR (p)))
|
||
return EOF;
|
||
SCM_SETCAR (p, SCM_MAKINUM (ind + 1));
|
||
return SCM_ROUCHARS (SCM_CDR (p))[ind];
|
||
}
|
||
|
||
|
||
SCM
|
||
scm_mkstrport (pos, str, modes, caller)
|
||
SCM pos;
|
||
SCM str;
|
||
long modes;
|
||
char * caller;
|
||
{
|
||
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_SETCAR (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);
|
||
|
||
SCM
|
||
scm_call_with_output_string (proc)
|
||
SCM proc;
|
||
{
|
||
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.
|
||
*/
|
||
|
||
|
||
SCM
|
||
scm_strprint_obj (obj)
|
||
SCM obj;
|
||
{
|
||
SCM str;
|
||
SCM port;
|
||
|
||
str = scm_makstr (64, 0);
|
||
port = scm_mkstrport (SCM_MAKINUM (0), str, SCM_OPN | SCM_WRTNG, "scm_strprint_obj");
|
||
scm_prin1 (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);
|
||
|
||
SCM
|
||
scm_call_with_input_string (str, proc)
|
||
SCM str;
|
||
SCM proc;
|
||
{
|
||
SCM p = scm_mkstrport(SCM_INUM0, str, SCM_OPN | SCM_RDNG, s_call_with_input_string);
|
||
return scm_apply (proc, p, scm_listofnull);
|
||
}
|
||
|
||
|
||
|
||
/* Given a null-terminated string EXPR containing a Scheme expression
|
||
read it, and return it as an SCM value. */
|
||
SCM
|
||
scm_read_0str (expr)
|
||
char *expr;
|
||
{
|
||
SCM port = scm_mkstrport (SCM_MAKINUM (0),
|
||
scm_makfrom0str (expr),
|
||
SCM_OPN | SCM_RDNG,
|
||
"scm_eval_0str");
|
||
SCM form;
|
||
|
||
/* Read expressions from that port; ignore the values. */
|
||
form = scm_read (port, SCM_BOOL_F, SCM_BOOL_F);
|
||
|
||
scm_close_port (port);
|
||
return form;
|
||
}
|
||
|
||
/* Given a null-terminated string EXPR containing Scheme program text,
|
||
evaluate it, and return the result of the last expression evaluated. */
|
||
SCM
|
||
scm_eval_0str (expr)
|
||
char *expr;
|
||
{
|
||
SCM port = scm_mkstrport (SCM_MAKINUM (0),
|
||
scm_makfrom0str (expr),
|
||
SCM_OPN | SCM_RDNG,
|
||
"scm_eval_0str");
|
||
SCM form;
|
||
SCM ans = SCM_EOL;
|
||
|
||
/* Read expressions from that port; ignore the values. */
|
||
while ((form = scm_read (port, SCM_BOOL_F, SCM_BOOL_F)) != SCM_EOF_VAL)
|
||
ans = scm_eval_x (form);
|
||
|
||
scm_close_port (port);
|
||
return ans;
|
||
}
|
||
|
||
|
||
static int noop0 SCM_P ((SCM stream));
|
||
|
||
static int
|
||
noop0 (stream)
|
||
SCM stream;
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
|
||
scm_ptobfuns scm_stptob =
|
||
{
|
||
scm_markstream,
|
||
noop0,
|
||
prinstpt,
|
||
0,
|
||
stputc,
|
||
stputs,
|
||
stwrite,
|
||
noop0,
|
||
stgetc,
|
||
0
|
||
};
|
||
|
||
|
||
|
||
void
|
||
scm_init_strports ()
|
||
{
|
||
#include "strports.x"
|
||
}
|
||
|