We recently modified scm_c_read so that it temporarily swaps the
caller's buffer with the port's normal read buffer, in order to
improve performance in the case where the port is unbuffered (which
actually means having a single-byte buffer) - but we implemented the
swap in the buffered case too. The latter turns out to be a bad idea
- because it means that the C code of a custom port implementation
cannot rely on a port's buffer always being the same as when it was
first set up - and so this commit reverts that. The buffer swapping
trick now applies to unbuffered ports only.
* libguile/ports.c (scm_c_read): Only do swapping of port and caller
buffer for unbuffered ports.
* NEWS: Update.
* libguile/threads.c (scm_i_init_thread_for_guile): When the thread is
already guilified, update `t->base' so that it corresponds to the new
stack base. Bug report and patch by Linas Vepstas <linasvepstas@gmail.com>.
* test-suite/standalone/Makefile.am (test_scm_with_guile_CFLAGS,
test_scm_with_guile_LDADD): New.
(check_PROGRAMS, TESTS): Add `test-scm-with-guile'.
* doc/guile.1: Remove reference to the version and date. Mention R5RS,
instead of R4RS. Explicitly say that the full documentation is in
Texinfo (as other GNU packages do).
* libguile/Makefile.am (stack-limit-calibration.scm): Use $(srcdir), to
support building in a different directory.
(MOSTLYCLEANFILES): Add stack-limit-calibration.scm.
For explanation, see comments and text in the new file
libguile/measure-hwm.scm.
* .gitignore: Add libguile/stack-limit-calibration.scm.
* check-guile.in: Load libguile/stack-limit-calibration.scm.
* configure.in: Add AC_CONFIG_FILES to generate test-use-srfi from
test-use-srfi.in.
* libguile/Makefile.am (TESTS, TESTS_ENVIRONMENT,
stack-limit-calibration.scm): New targets, so that `make check'
calibrates the stack limit before running the Guile test suite.
* libguile/measure-hwm.scm: New file, calibrates stack limit for `make
check'.
* libguile/stackchk.c (scm_sys_get_stack_size): New primitive.
* libguile/stackchk.h (scm_sys_get_stack_size): New primitive
(declaration).
* test-suite/standalone/test-use-srfi: Renamed test-use-srfi.in, so
that ./configure can fill in variables in it.
* test-suite/standalone/test-use-srfi.in: Load
libguile/stack-limit-calibration.scm.
* libguile/threads.c (scm_threads_mark_stacks): Cast `&t->regs' to
`(void *)' rather than `(SCM_STACKITEM *)' to avoid "warning:
dereferencing type-punned pointer will break strict-aliasing rules"
with GCC 4.2.1 on `i386-unknown-freebsd7.0'.
* ice-9/regex.scm (fold-matches): If FLAGS is non-null, use
`(car flags)', not `flags'.
* test-suite/tests/regexp.test ("fold-matches"): New test prefix.
* NEWS: Update.
* libguile/read.c (scm_read_string): Use `scm_i_make_read_only_string ()' to
return a read-only string, as mandated by R5RS. Reported by Bill
Schottstaedt <bil@ccrma.Stanford.EDU>.
* libguile/strings.c (scm_i_make_read_only_string): New function.
(scm_i_shared_substring_read_only): Special-case the empty string
so that the read-only and read-write empty strings are `eq?'. This
optimization is relied on by the `substring/shared' `empty string'
test case in `srfi-13.test'.
* libguile/strings.h (scm_i_make_read_only_string): New declaration.
* test-suite/tests/strings.test ("string-set!")["literal string"]: New test.
* NEWS: Update.
* libguile/strings.c (scm_i_symbol_substring): Return a read-only string
since R5RS requires `symbol->string' to return a read-only string.
Reported by Bill Schottstaedt <bil@ccrma.Stanford.EDU>.
* test-suite/tests/symbols.test: Add `define-module' clause.
(exception:immutable-string): Adjust to current exception.
("symbol->string")["result is an immutable string"]: Use
`pass-if-exception' instead of `expect-fail-exception'.
* NEWS: Update.
(reported by Bill Schottstaedt)
* libguile/numbers.c (scm_gcd): When only one arg given, use scm_abs
to ensure that result is non-negative.
* test-suite/tests/numbers.test ("gcd"): New test, (gcd -2).
Idea and original patch were by Ludovic Courts, this is Neil Jerram's
reworking of it.
* libguile/srfi-4.c (scm_uniform_vector_read_x): Use scm_c_read,
instead of equivalent code here.
* libguile/ports.c (scm_fill_input): Add assertion that read
buffer is empty when called.
(port_and_swap_buffer, swap_buffer): New, for...
(scm_c_read): Use caller's buffer for reading, to avoid making N
1-byte low-level read calls, in the case where the port is
unbuffered (or has a very small buffer).
* test-suite/standalone/Makefile.am (test_cflags): Add `-I$(top_builddir)' so
that <config.h> can be found.
(snarfcppopts): Likewise.
* test-suite/standalone/*.c: Include <config.h>.
When you use GDS to evaluate Scheme code from Emacs, you can now use
`C-u' to indicate that you want to single step through that code. See
`Evaluating Scheme Code' in the manual for more details.
* scheme-using.texi (Evaluating Scheme Code): Document use of
`C-u' prefix with evaluation commands.
* gds-scheme.el (gds-eval-region, gds-eval-expression)
(gds-eval-defun, gds-eval-last-sexp): Support `C-u' prefix,
meaning that user wants to single step through the code.
* gds-client.scm (handle-nondebug-protocol): Add support for
setting a trap on code that is about to be evaluated.
