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authorGary Houston <ghouston@arglist.com>2001-04-29 13:03:14 +0000
committerGary Houston <ghouston@arglist.com>2001-04-29 13:03:14 +0000
commitb0e5fd8c3d8c09b4b11224e9f8d4cbf6a20a07a8 (patch)
treec06482e6e33986ea1c8f10a41ba3979fdd1ddd2f /libguile/ioext.c
parent370bababdadc9bc93ef4fef1125dcdeaa1842a87 (diff)
downloadguile-b0e5fd8c3d8c09b4b11224e9f8d4cbf6a20a07a8.tar.gz
* rw.c: new file, implementing C part of module (ice-9 rw).
(scm_read_string_x_partial): moved from ioext.c (scm_init_rw): new proc. * rw.h: new file. init.c: include rw.h and call scm_init_rw. Makefile.am: include rw.c and rw.h.
Diffstat (limited to 'libguile/ioext.c')
-rw-r--r--libguile/ioext.c103
1 files changed, 0 insertions, 103 deletions
diff --git a/libguile/ioext.c b/libguile/ioext.c
index 3923ed95c..2c1ed4a46 100644
--- a/libguile/ioext.c
+++ b/libguile/ioext.c
@@ -51,119 +51,16 @@
#include "libguile/fports.h"
#include "libguile/feature.h"
#include "libguile/ports.h"
-#include "libguile/root.h"
#include "libguile/strings.h"
#include "libguile/validate.h"
#include <fcntl.h>
-#ifdef HAVE_STRING_H
-#include <string.h>
-#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
-#if defined (EAGAIN)
-#define SCM_MAYBE_EAGAIN || errno == EAGAIN
-#else
-#define SCM_MAYBE_EAGAIN
-#endif
-
-#if defined (EWOULDBLOCK)
-#define SCM_MAYBE_EWOULDBLOCK || errno == EWOULDBLOCK
-#else
-#define SCM_MAYBE_EWOULDBLOCK
-#endif
-
-/* MAYBE there is EAGAIN way of defining this macro but now I EWOULDBLOCK. */
-#define SCM_EBLOCK(errno) \
- (0 SCM_MAYBE_EAGAIN SCM_MAYBE_EWOULDBLOCK)
-
-SCM_DEFINE (scm_read_string_x_partial, "read-string!/partial", 1, 3, 0,
- (SCM str, SCM port_or_fdes, SCM start, SCM end),
- "Read characters from an fport or file descriptor into a\n"
- "string @var{str}. This procedure is scsh-compatible\n"
- "and can efficiently read large strings. It will:\n\n"
- "@itemize\n"
- "@item\n"
- "attempt to fill the entire string, unless the @var{start}\n"
- "and/or @var{end} arguments are supplied. i.e., @var{start}\n"
- "defaults to 0 and @var{end} defaults to\n"
- "@code{(string-length str)}\n"
- "@item\n"
- "use the current input port if @var{port_or_fdes} is not\n"
- "supplied.\n"
- "@item\n"
- "read any characters that are currently available,\n"
- "without waiting for the rest (short reads are possible).\n\n"
- "@item\n"
- "wait for as long as it needs to for the first character to\n"
- "become available, unless the port is in non-blocking mode\n"
- "@item\n"
- "return @code{#f} if end-of-file is encountered before reading\n"
- "any characters, otherwise return the number of characters\n"
- "read.\n"
- "@item\n"
- "return 0 if the port is in non-blocking mode and no characters\n"
- "are immediately available.\n"
- "@item\n"
- "return 0 if the request is for 0 bytes, with no\n"
- "end-of-file check\n"
- "@end itemize")
-#define FUNC_NAME s_scm_read_string_x_partial
-{
- char *dest;
- long read_len;
- long chars_read = 0;
- int fdes;
-
- {
- long offset;
- long last;
-
- SCM_VALIDATE_SUBSTRING_SPEC_COPY (1, str, dest, 3, start, offset,
- 4, end, last);
- dest += offset;
- read_len = last - offset;
- }
-
- if (SCM_INUMP (port_or_fdes))
- fdes = SCM_INUM (port_or_fdes);
- else
- {
- SCM port = SCM_UNBNDP (port_or_fdes) ? scm_cur_inp : port_or_fdes;
-
- SCM_VALIDATE_OPFPORT (2, port);
- SCM_VALIDATE_INPUT_PORT (2, port);
-
- /* if there's anything in the port buffers, use it, but then
- don't touch the file descriptor. otherwise the
- "return immediately if something is available" rule may
- be violated. */
- chars_read = scm_take_from_input_buffers (port, dest, read_len);
- fdes = SCM_FPORT_FDES (port);
- }
-
- if (chars_read == 0 && read_len > 0) /* don't confuse read_len == 0 with
- EOF. */
- {
- SCM_SYSCALL (chars_read = read (fdes, dest, read_len));
- if (chars_read == -1)
- {
- if (SCM_EBLOCK (errno))
- chars_read = 0;
- else
- SCM_SYSERROR;
- }
- else if (chars_read == 0)
- return SCM_BOOL_F;
- }
- return scm_long2num (chars_read);
-}
-#undef FUNC_NAME
-
SCM_DEFINE (scm_ftell, "ftell", 1, 0, 0,
(SCM fd_port),
"Return an integer representing the current position of\n"