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[Guile-commits] GNU Guile branch, stable-2.0, updated. v2.0.6-54-g9331ff
From: |
Mark H Weaver |
Subject: |
[Guile-commits] GNU Guile branch, stable-2.0, updated. v2.0.6-54-g9331ffd |
Date: |
Fri, 26 Oct 2012 21:11:18 +0000 |
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http://git.savannah.gnu.org/cgit/guile.git/commit/?id=9331ffd891d03bc736f98bf92628b4b2fa714e68
The branch, stable-2.0 has been updated
via 9331ffd891d03bc736f98bf92628b4b2fa714e68 (commit)
via ea8c97615590ec60f2df0f7f356b04aa0a174eef (commit)
from 851c3cd16e6b9caee069581aa34e198d1df14c71 (commit)
Those revisions listed above that are new to this repository have
not appeared on any other notification email; so we list those
revisions in full, below.
- Log -----------------------------------------------------------------
commit 9331ffd891d03bc736f98bf92628b4b2fa714e68
Author: Mark H Weaver <address@hidden>
Date: Wed Oct 24 14:37:36 2012 -0400
Implement #!fold-case and #!no-fold-case reader directives.
* libguile/read.c (set_port_case_insensitive_p): New function.
(scm_read_shebang): Handle #!fold-case and #!no-fold-case.
* doc/ref/api-evaluation.texi (Case Sensitivity, Scheme Read): Document
the #!fold-case and #!no-fold-case reader directives.
* test-suite/tests/reader.test ("per-port-read-options"): Add tests.
commit ea8c97615590ec60f2df0f7f356b04aa0a174eef
Author: Mark H Weaver <address@hidden>
Date: Tue Oct 23 17:28:43 2012 -0400
Implement per-port read options.
* libguile/read.c (scm_t_read_opts): Update comment to mention the
per-port read options.
(sym_port_read_options): New variable.
(set_port_read_option): New function.
(init_read_options): Add new 'port' parameter, and consult the
per-port read option overrides when initializing the 'scm_t_read_opts'
struct. Move to bottom of file.
(scm_read): Pass 'port' parameter to init_read_options.
-----------------------------------------------------------------------
Summary of changes:
doc/ref/api-evaluation.texi | 22 ++++--
libguile/read.c | 177 +++++++++++++++++++++++++++++++++---------
test-suite/tests/reader.test | 13 +++
3 files changed, 167 insertions(+), 45 deletions(-)
diff --git a/doc/ref/api-evaluation.texi b/doc/ref/api-evaluation.texi
index 6112832..c7bf97a 100644
--- a/doc/ref/api-evaluation.texi
+++ b/doc/ref/api-evaluation.texi
@@ -254,6 +254,8 @@ Encoding of Source Files}.
@node Case Sensitivity
@subsubsection Case Sensitivity
address@hidden fold-case
address@hidden no-fold-case
@c FIXME::martin: Review me!
@@ -275,9 +277,9 @@ options, @xref{Scheme Read}.
(read-enable 'case-insensitive)
@end lisp
-Note that this is seldom a problem, because Scheme programmers tend not
-to use uppercase letters in their identifiers anyway.
-
+It is also possible to disable (or enable) case sensitivity within a
+single file by placing the reader directives @code{#!fold-case} (or
address@hidden) within the file itself.
@node Keyword Syntax
@subsubsection Keyword Syntax
@@ -315,10 +317,10 @@ its read options.
@cindex options - read
@cindex read options
@deffn {Scheme Procedure} read-options [setting]
-Display the current settings of the read options. If @var{setting} is
-omitted, only a short form of the current read options is printed.
-Otherwise if @var{setting} is the symbol @code{help}, a complete options
-description is displayed.
+Display the current settings of the global read options. If
address@hidden is omitted, only a short form of the current read options
+is printed. Otherwise if @var{setting} is the symbol @code{help}, a
+complete options description is displayed.
@end deffn
The set of available options, and their default values, may be had by
@@ -338,6 +340,12 @@ hungry-eol-escapes no In strings, consume leading
whitespace after an
escaped end-of-line.
@end smalllisp
+Note that Guile also includes a preliminary mechanism for setting read
+options on a per-port basis. For instance, the @code{case-insensitive}
+read option is set (or unset) on the port when the reader encounters the
address@hidden or @code{#!no-fold-case} reader directives. There is
+currently no other way to access or set the per-port read options.
+
The boolean options may be toggled with @code{read-enable} and
@code{read-disable}. The non-boolean @code{keywords} option must be set
using @code{read-set!}.
diff --git a/libguile/read.c b/libguile/read.c
index 6c91613..ec1d394 100644
--- a/libguile/read.c
+++ b/libguile/read.c
@@ -82,15 +82,18 @@ scm_t_option scm_read_opts[] = {
};
/* Internal read options structure. This is initialized by 'scm_read'
- from the global read options, and a pointer is passed down to all
- helper functions. */
-enum t_keyword_style {
- KEYWORD_STYLE_HASH_PREFIX,
- KEYWORD_STYLE_PREFIX,
- KEYWORD_STYLE_POSTFIX
-};
+ from the global and per-port read options, and a pointer is passed
+ down to all helper functions. */
+
+enum t_keyword_style
+ {
+ KEYWORD_STYLE_HASH_PREFIX,
+ KEYWORD_STYLE_PREFIX,
+ KEYWORD_STYLE_POSTFIX
+ };
-struct t_read_opts {
+struct t_read_opts
+{
enum t_keyword_style keyword_style;
unsigned int copy_source_p : 1;
unsigned int record_positions_p : 1;
@@ -102,35 +105,6 @@ struct t_read_opts {
typedef struct t_read_opts scm_t_read_opts;
-/* Initialize OPTS from the global read options. */
-static void
-init_read_options (scm_t_read_opts *opts)
-{
- SCM val;
- int x;
-
- val = SCM_PACK (SCM_KEYWORD_STYLE);
- if (scm_is_eq (val, scm_keyword_prefix))
- x = KEYWORD_STYLE_PREFIX;
- else if (scm_is_eq (val, scm_keyword_postfix))
- x = KEYWORD_STYLE_POSTFIX;
- else
- x = KEYWORD_STYLE_HASH_PREFIX;
- opts->keyword_style = x;
-
-#define RESOLVE_BOOLEAN_OPTION(NAME, name) \
- (opts->name = !!SCM_ ## NAME)
-
- RESOLVE_BOOLEAN_OPTION (COPY_SOURCE_P, copy_source_p);
- RESOLVE_BOOLEAN_OPTION (RECORD_POSITIONS_P, record_positions_p);
- RESOLVE_BOOLEAN_OPTION (CASE_INSENSITIVE_P, case_insensitive_p);
- RESOLVE_BOOLEAN_OPTION (R6RS_ESCAPES_P, r6rs_escapes_p);
- RESOLVE_BOOLEAN_OPTION (SQUARE_BRACKETS_P, square_brackets_p);
- RESOLVE_BOOLEAN_OPTION (HUNGRY_EOL_ESCAPES_P, hungry_eol_escapes_p);
-
-#undef RESOLVE_BOOLEAN_OPTION
-}
-
/*
Give meaningful error messages for errors
@@ -1305,6 +1279,9 @@ scm_read_scsh_block_comment (scm_t_wchar chr, SCM port)
return SCM_UNSPECIFIED;
}
+static void set_port_case_insensitive_p (SCM port, scm_t_read_opts *opts,
+ int value);
+
static SCM
scm_read_shebang (scm_t_wchar chr, SCM port, scm_t_read_opts *opts)
{
@@ -1326,6 +1303,10 @@ scm_read_shebang (scm_t_wchar chr, SCM port,
scm_t_read_opts *opts)
name[i] = '\0';
if (0 == strcmp ("r6rs", name))
; /* Silently ignore */
+ else if (0 == strcmp ("fold-case", name))
+ set_port_case_insensitive_p (port, opts, 1);
+ else if (0 == strcmp ("no-fold-case", name))
+ set_port_case_insensitive_p (port, opts, 0);
else
break;
@@ -1692,6 +1673,8 @@ scm_read_expression (SCM port, scm_t_read_opts *opts)
/* Actual reader. */
+static void init_read_options (SCM port, scm_t_read_opts *opts);
+
SCM_DEFINE (scm_read, "read", 0, 1, 0,
(SCM port),
"Read an s-expression from the input port @var{port}, or from\n"
@@ -1706,7 +1689,7 @@ SCM_DEFINE (scm_read, "read", 0, 1, 0,
port = scm_current_input_port ();
SCM_VALIDATE_OPINPORT (1, port);
- init_read_options (&opts);
+ init_read_options (port, &opts);
c = flush_ws (port, &opts, (char *) NULL);
if (EOF == c)
@@ -1970,6 +1953,124 @@ SCM_DEFINE (scm_file_encoding, "file-encoding", 1, 0, 0,
}
#undef FUNC_NAME
+
+/* Per-port read options.
+
+ We store per-port read options in the 'port-read-options' key of the
+ port's alist, which is stored in 'scm_i_port_weak_hash'. The value
+ stored in the alist is a single integer that contains a two-bit field
+ for each read option.
+
+ If a bit field contains READ_OPTION_INHERIT (3), that indicates that
+ the applicable value should be inherited from the corresponding
+ global read option. Otherwise, the bit field contains the value of
+ the read option. For boolean read options that have been set
+ per-port, the possible values are 0 or 1. If the 'keyword_style'
+ read option has been set per-port, its possible values are those in
+ 'enum t_keyword_style'. */
+
+/* Key to read options in per-port alists. */
+SCM_SYMBOL (sym_port_read_options, "port-read-options");
+
+/* Offsets of bit fields for each per-port override */
+#define READ_OPTION_COPY_SOURCE_P 0
+#define READ_OPTION_RECORD_POSITIONS_P 2
+#define READ_OPTION_CASE_INSENSITIVE_P 4
+#define READ_OPTION_KEYWORD_STYLE 6
+#define READ_OPTION_R6RS_ESCAPES_P 8
+#define READ_OPTION_SQUARE_BRACKETS_P 10
+#define READ_OPTION_HUNGRY_EOL_ESCAPES_P 12
+
+#define READ_OPTIONS_NUM_BITS 14
+
+#define READ_OPTIONS_INHERIT_ALL ((1UL << READ_OPTIONS_NUM_BITS) - 1)
+#define READ_OPTIONS_MAX_VALUE READ_OPTIONS_INHERIT_ALL
+
+#define READ_OPTION_MASK 3
+#define READ_OPTION_INHERIT 3
+
+static void
+set_port_read_option (SCM port, int option, int new_value)
+{
+ SCM alist, scm_read_options;
+ unsigned int read_options;
+
+ new_value &= READ_OPTION_MASK;
+ scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex);
+ alist = scm_hashq_ref (scm_i_port_weak_hash, port, SCM_BOOL_F);
+ scm_read_options = scm_assq_ref (alist, sym_port_read_options);
+ if (scm_is_unsigned_integer (scm_read_options, 0, READ_OPTIONS_MAX_VALUE))
+ read_options = scm_to_uint (scm_read_options);
+ else
+ read_options = READ_OPTIONS_INHERIT_ALL;
+ read_options &= ~(READ_OPTION_MASK << option);
+ read_options |= new_value << option;
+ scm_read_options = scm_from_uint (read_options);
+ alist = scm_assq_set_x (alist, sym_port_read_options, scm_read_options);
+ scm_hashq_set_x (scm_i_port_weak_hash, port, alist);
+ scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex);
+}
+
+/* Set OPTS and PORT's case-insensitivity according to VALUE. */
+static void
+set_port_case_insensitive_p (SCM port, scm_t_read_opts *opts, int value)
+{
+ value = !!value;
+ opts->case_insensitive_p = value;
+ set_port_read_option (port, READ_OPTION_CASE_INSENSITIVE_P, value);
+}
+
+/* Initialize OPTS based on PORT's read options and the global read
+ options. */
+static void
+init_read_options (SCM port, scm_t_read_opts *opts)
+{
+ SCM alist, val, scm_read_options;
+ unsigned int read_options, x;
+
+ scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex);
+ alist = scm_hashq_ref (scm_i_port_weak_hash, port, SCM_BOOL_F);
+ scm_read_options = scm_assq_ref (alist, sym_port_read_options);
+ scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex);
+
+ if (scm_is_unsigned_integer (scm_read_options, 0, READ_OPTIONS_MAX_VALUE))
+ read_options = scm_to_uint (scm_read_options);
+ else
+ read_options = READ_OPTIONS_INHERIT_ALL;
+
+ x = READ_OPTION_MASK & (read_options >> READ_OPTION_KEYWORD_STYLE);
+ if (x == READ_OPTION_INHERIT)
+ {
+ val = SCM_PACK (SCM_KEYWORD_STYLE);
+ if (scm_is_eq (val, scm_keyword_prefix))
+ x = KEYWORD_STYLE_PREFIX;
+ else if (scm_is_eq (val, scm_keyword_postfix))
+ x = KEYWORD_STYLE_POSTFIX;
+ else
+ x = KEYWORD_STYLE_HASH_PREFIX;
+ }
+ opts->keyword_style = x;
+
+#define RESOLVE_BOOLEAN_OPTION(NAME, name) \
+ do \
+ { \
+ x = READ_OPTION_MASK & (read_options >> READ_OPTION_ ## NAME); \
+ if (x == READ_OPTION_INHERIT) \
+ x = !!SCM_ ## NAME; \
+ opts->name = x; \
+ } \
+ while (0)
+
+ RESOLVE_BOOLEAN_OPTION (COPY_SOURCE_P, copy_source_p);
+ RESOLVE_BOOLEAN_OPTION (RECORD_POSITIONS_P, record_positions_p);
+ RESOLVE_BOOLEAN_OPTION (CASE_INSENSITIVE_P, case_insensitive_p);
+ RESOLVE_BOOLEAN_OPTION (R6RS_ESCAPES_P, r6rs_escapes_p);
+ RESOLVE_BOOLEAN_OPTION (SQUARE_BRACKETS_P, square_brackets_p);
+ RESOLVE_BOOLEAN_OPTION (HUNGRY_EOL_ESCAPES_P, hungry_eol_escapes_p);
+
+#undef RESOLVE_BOOLEAN_OPTION
+}
+
void
scm_init_read ()
{
diff --git a/test-suite/tests/reader.test b/test-suite/tests/reader.test
index 60c853c..6e02255 100644
--- a/test-suite/tests/reader.test
+++ b/test-suite/tests/reader.test
@@ -401,6 +401,19 @@
(lambda ()
(read-disable 'hungry-eol-escapes))))))
+(with-test-prefix "per-port-read-options"
+ (pass-if "case-sensitive"
+ (equal? '(guile GuiLe gUIle)
+ (with-read-options '(case-insensitive)
+ (lambda ()
+ (with-input-from-string "GUIle #!no-fold-case GuiLe gUIle"
+ (lambda ()
+ (list (read) (read) (read))))))))
+ (pass-if "case-insensitive"
+ (equal? '(GUIle guile guile)
+ (with-input-from-string "GUIle #!fold-case GuiLe gUIle"
+ (lambda ()
+ (list (read) (read) (read)))))))
(with-test-prefix "#;"
(for-each
hooks/post-receive
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