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ruby/ext/readline/readline.c

855 строки
21 KiB
C
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/* readline.c -- GNU Readline module
Copyright (C) 1997-2001 Shugo Maeda */
#ifdef RUBY_EXTCONF_H
#include RUBY_EXTCONF_H
#endif
#include "ruby/config.h"
#include <errno.h>
#include <stdio.h>
#include <string.h>
#ifdef HAVE_READLINE_READLINE_H
#include <readline/readline.h>
#endif
#ifdef HAVE_READLINE_HISTORY_H
#include <readline/history.h>
#endif
#ifdef HAVE_EDITLINE_READLINE_H
#include <editline/readline.h>
#endif
#include "ruby/ruby.h"
#include "ruby/io.h"
#include "ruby/signal.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
static VALUE mReadline;
#define EDIT_LINE_LIBRARY_VERSION "EditLine wrapper"
#define COMPLETION_PROC "completion_proc"
#define COMPLETION_CASE_FOLD "completion_case_fold"
static ID completion_proc, completion_case_fold;
#ifndef HAVE_RL_FILENAME_COMPLETION_FUNCTION
# define rl_filename_completion_function filename_completion_function
#endif
#ifndef HAVE_RL_USERNAME_COMPLETION_FUNCTION
# define rl_username_completion_function username_completion_function
#endif
#ifndef HAVE_RL_COMPLETION_MATCHES
# define rl_completion_matches completion_matches
#endif
static int (*history_get_offset_func)(int);
static char **readline_attempted_completion_function(const char *text,
int start, int end);
#ifdef HAVE_RL_EVENT_HOOK
#define BUSY_WAIT 0
static int readline_event(void);
static int
readline_event(void)
{
#if BUSY_WAIT
rb_thread_schedule();
#else
fd_set rset;
FD_ZERO(&rset);
FD_SET(fileno(rl_instream), &rset);
rb_thread_select(fileno(rl_instream) + 1, &rset, NULL, NULL, NULL);
return 0;
#endif
}
#endif
static VALUE
readline_readline(int argc, VALUE *argv, VALUE self)
{
VALUE tmp, add_hist, result;
char *prompt = NULL;
char *buff;
int status;
rb_secure(4);
if (rb_scan_args(argc, argv, "02", &tmp, &add_hist) > 0) {
SafeStringValue(tmp);
prompt = RSTRING_PTR(tmp);
}
if (!isatty(0) && errno == EBADF) rb_raise(rb_eIOError, "stdin closed");
buff = (char*)rb_protect((VALUE(*)_((VALUE)))readline, (VALUE)prompt,
&status);
if (status) {
#if defined HAVE_RL_CLEANUP_AFTER_SIGNAL
/* restore terminal mode and signal handler*/
rl_cleanup_after_signal();
#elif defined HAVE_RL_DEPREP_TERM_FUNCTION
/* restore terminal mode */
if (rl_deprep_term_function != NULL) /* NULL in libedit. [ruby-dev:29116] */
(*rl_deprep_term_function)();
else
#else
rl_deprep_terminal();
#endif
rb_jump_tag(status);
}
if (RTEST(add_hist) && buff) {
add_history(buff);
}
if (buff) {
result = rb_tainted_str_new2(buff);
rb_enc_associate(result, rb_locale_encoding());
}
else
result = Qnil;
if (buff) free(buff);
return result;
}
static VALUE
readline_s_set_input(VALUE self, VALUE input)
{
rb_io_t *ifp;
rb_secure(4);
Check_Type(input, T_FILE);
GetOpenFile(input, ifp);
rl_instream = rb_io_stdio_file(ifp);
return input;
}
static VALUE
readline_s_set_output(VALUE self, VALUE output)
{
rb_io_t *ofp;
rb_secure(4);
Check_Type(output, T_FILE);
GetOpenFile(output, ofp);
rl_outstream = rb_io_stdio_file(ofp);
return output;
}
static VALUE
readline_s_set_completion_proc(VALUE self, VALUE proc)
{
rb_secure(4);
if (!rb_respond_to(proc, rb_intern("call")))
rb_raise(rb_eArgError, "argument must respond to `call'");
return rb_ivar_set(mReadline, completion_proc, proc);
}
static VALUE
readline_s_get_completion_proc(VALUE self)
{
rb_secure(4);
return rb_attr_get(mReadline, completion_proc);
}
static VALUE
readline_s_set_completion_case_fold(VALUE self, VALUE val)
{
rb_secure(4);
return rb_ivar_set(mReadline, completion_case_fold, val);
}
static VALUE
readline_s_get_completion_case_fold(VALUE self)
{
rb_secure(4);
return rb_attr_get(mReadline, completion_case_fold);
}
static char **
readline_attempted_completion_function(const char *text, int start, int end)
{
VALUE proc, ary, temp;
char **result;
int case_fold;
int i, matches;
proc = rb_attr_get(mReadline, completion_proc);
if (NIL_P(proc))
return NULL;
#ifdef HAVE_RL_ATTEMPTED_COMPLETION_OVER
rl_attempted_completion_over = 1;
#endif
case_fold = RTEST(rb_attr_get(mReadline, completion_case_fold));
ary = rb_funcall(proc, rb_intern("call"), 1, rb_tainted_str_new2(text));
if (TYPE(ary) != T_ARRAY)
ary = rb_Array(ary);
matches = RARRAY_LEN(ary);
if (matches == 0)
return NULL;
result = ALLOC_N(char *, matches + 2);
for (i = 0; i < matches; i++) {
temp = rb_obj_as_string(RARRAY_PTR(ary)[i]);
result[i + 1] = ALLOC_N(char, RSTRING_LEN(temp) + 1);
strcpy(result[i + 1], RSTRING_PTR(temp));
}
result[matches + 1] = NULL;
if (matches == 1) {
result[0] = strdup(result[1]);
}
else {
register int i = 1;
int low = 100000;
while (i < matches) {
register int c1, c2, si;
if (case_fold) {
for (si = 0;
(c1 = TOLOWER(result[i][si])) &&
(c2 = TOLOWER(result[i + 1][si]));
si++)
if (c1 != c2) break;
} else {
for (si = 0;
(c1 = result[i][si]) &&
(c2 = result[i + 1][si]);
si++)
if (c1 != c2) break;
}
if (low > si) low = si;
i++;
}
result[0] = ALLOC_N(char, low + 1);
strncpy(result[0], result[1], low);
result[0][low] = '\0';
}
return result;
}
static VALUE
readline_s_vi_editing_mode(VALUE self)
{
#ifdef HAVE_RL_VI_EDITING_MODE
rb_secure(4);
rl_vi_editing_mode(1,0);
return Qnil;
#else
rb_notimplement();
return Qnil; /* not reached */
#endif /* HAVE_RL_VI_EDITING_MODE */
}
static VALUE
readline_s_emacs_editing_mode(VALUE self)
{
#ifdef HAVE_RL_EMACS_EDITING_MODE
rb_secure(4);
rl_emacs_editing_mode(1,0);
return Qnil;
#else
rb_notimplement();
return Qnil; /* not reached */
#endif /* HAVE_RL_EMACS_EDITING_MODE */
}
static VALUE
readline_s_set_completion_append_character(VALUE self, VALUE str)
{
#ifdef HAVE_RL_COMPLETION_APPEND_CHARACTER
rb_secure(4);
if (NIL_P(str)) {
rl_completion_append_character = '\0';
}
else {
SafeStringValue(str);
if (RSTRING_LEN(str) == 0) {
rl_completion_append_character = '\0';
} else {
rl_completion_append_character = RSTRING_PTR(str)[0];
}
}
return self;
#else
rb_notimplement();
return Qnil; /* not reached */
#endif /* HAVE_RL_COMPLETION_APPEND_CHARACTER */
}
static VALUE
readline_s_get_completion_append_character(VALUE self)
{
#ifdef HAVE_RL_COMPLETION_APPEND_CHARACTER
VALUE str;
rb_secure(4);
if (rl_completion_append_character == '\0')
return Qnil;
str = rb_str_new("", 1);
RSTRING_PTR(str)[0] = rl_completion_append_character;
return str;
#else
rb_notimplement();
return Qnil; /* not reached */
#endif /* HAVE_RL_COMPLETION_APPEND_CHARACTER */
}
static VALUE
readline_s_set_basic_word_break_characters(VALUE self, VALUE str)
{
#ifdef HAVE_RL_BASIC_WORD_BREAK_CHARACTERS
static char *basic_word_break_characters = NULL;
rb_secure(4);
SafeStringValue(str);
if (basic_word_break_characters == NULL) {
basic_word_break_characters =
ALLOC_N(char, RSTRING_LEN(str) + 1);
}
else {
REALLOC_N(basic_word_break_characters, char, RSTRING_LEN(str) + 1);
}
strncpy(basic_word_break_characters,
RSTRING_PTR(str), RSTRING_LEN(str));
basic_word_break_characters[RSTRING_LEN(str)] = '\0';
rl_basic_word_break_characters = basic_word_break_characters;
return self;
#else
rb_notimplement();
return Qnil; /* not reached */
#endif /* HAVE_RL_BASIC_WORD_BREAK_CHARACTERS */
}
static VALUE
readline_s_get_basic_word_break_characters(VALUE self, VALUE str)
{
#ifdef HAVE_RL_BASIC_WORD_BREAK_CHARACTERS
rb_secure(4);
if (rl_basic_word_break_characters == NULL)
return Qnil;
return rb_tainted_str_new2(rl_basic_word_break_characters);
#else
rb_notimplement();
return Qnil; /* not reached */
#endif /* HAVE_RL_BASIC_WORD_BREAK_CHARACTERS */
}
static VALUE
readline_s_set_completer_word_break_characters(VALUE self, VALUE str)
{
#ifdef HAVE_RL_COMPLETER_WORD_BREAK_CHARACTERS
static char *completer_word_break_characters = NULL;
rb_secure(4);
SafeStringValue(str);
if (completer_word_break_characters == NULL) {
completer_word_break_characters =
ALLOC_N(char, RSTRING_LEN(str) + 1);
}
else {
REALLOC_N(completer_word_break_characters, char, RSTRING_LEN(str) + 1);
}
strncpy(completer_word_break_characters,
RSTRING_PTR(str), RSTRING_LEN(str));
completer_word_break_characters[RSTRING_LEN(str)] = '\0';
rl_completer_word_break_characters = completer_word_break_characters;
return self;
#else
rb_notimplement();
return Qnil; /* not reached */
#endif /* HAVE_RL_COMPLETER_WORD_BREAK_CHARACTERS */
}
static VALUE
readline_s_get_completer_word_break_characters(VALUE self, VALUE str)
{
#ifdef HAVE_RL_COMPLETER_WORD_BREAK_CHARACTERS
rb_secure(4);
if (rl_completer_word_break_characters == NULL)
return Qnil;
return rb_tainted_str_new2(rl_completer_word_break_characters);
#else
rb_notimplement();
return Qnil; /* not reached */
#endif /* HAVE_RL_COMPLETER_WORD_BREAK_CHARACTERS */
}
static VALUE
readline_s_set_basic_quote_characters(VALUE self, VALUE str)
{
#ifdef HAVE_RL_BASIC_QUOTE_CHARACTERS
static char *basic_quote_characters = NULL;
rb_secure(4);
SafeStringValue(str);
if (basic_quote_characters == NULL) {
basic_quote_characters =
ALLOC_N(char, RSTRING_LEN(str) + 1);
}
else {
REALLOC_N(basic_quote_characters, char, RSTRING_LEN(str) + 1);
}
strncpy(basic_quote_characters,
RSTRING_PTR(str), RSTRING_LEN(str));
basic_quote_characters[RSTRING_LEN(str)] = '\0';
rl_basic_quote_characters = basic_quote_characters;
return self;
#else
rb_notimplement();
return Qnil; /* not reached */
#endif /* HAVE_RL_BASIC_QUOTE_CHARACTERS */
}
static VALUE
readline_s_get_basic_quote_characters(VALUE self, VALUE str)
{
#ifdef HAVE_RL_BASIC_QUOTE_CHARACTERS
rb_secure(4);
if (rl_basic_quote_characters == NULL)
return Qnil;
return rb_tainted_str_new2(rl_basic_quote_characters);
#else
rb_notimplement();
return Qnil; /* not reached */
#endif /* HAVE_RL_BASIC_QUOTE_CHARACTERS */
}
static VALUE
readline_s_set_completer_quote_characters(VALUE self, VALUE str)
{
#ifdef HAVE_RL_COMPLETER_QUOTE_CHARACTERS
static char *completer_quote_characters = NULL;
rb_secure(4);
SafeStringValue(str);
if (completer_quote_characters == NULL) {
completer_quote_characters =
ALLOC_N(char, RSTRING_LEN(str) + 1);
}
else {
REALLOC_N(completer_quote_characters, char, RSTRING_LEN(str) + 1);
}
strncpy(completer_quote_characters, RSTRING_PTR(str), RSTRING_LEN(str));
completer_quote_characters[RSTRING_LEN(str)] = '\0';
rl_completer_quote_characters = completer_quote_characters;
return self;
#else
rb_notimplement();
return Qnil; /* not reached */
#endif /* HAVE_RL_COMPLETER_QUOTE_CHARACTERS */
}
static VALUE
readline_s_get_completer_quote_characters(VALUE self, VALUE str)
{
#ifdef HAVE_RL_COMPLETER_QUOTE_CHARACTERS
rb_secure(4);
if (rl_completer_quote_characters == NULL)
return Qnil;
return rb_tainted_str_new2(rl_completer_quote_characters);
#else
rb_notimplement();
return Qnil; /* not reached */
#endif /* HAVE_RL_COMPLETER_QUOTE_CHARACTERS */
}
static VALUE
readline_s_set_filename_quote_characters(VALUE self, VALUE str)
{
#ifdef HAVE_RL_FILENAME_QUOTE_CHARACTERS
static char *filename_quote_characters = NULL;
rb_secure(4);
SafeStringValue(str);
if (filename_quote_characters == NULL) {
filename_quote_characters =
ALLOC_N(char, RSTRING_LEN(str) + 1);
}
else {
REALLOC_N(filename_quote_characters, char, RSTRING_LEN(str) + 1);
}
strncpy(filename_quote_characters, RSTRING_PTR(str), RSTRING_LEN(str));
filename_quote_characters[RSTRING_LEN(str)] = '\0';
rl_filename_quote_characters = filename_quote_characters;
return self;
#else
rb_notimplement();
return Qnil; /* not reached */
#endif /* HAVE_RL_FILENAME_QUOTE_CHARACTERS */
}
static VALUE
readline_s_get_filename_quote_characters(VALUE self, VALUE str)
{
#ifdef HAVE_RL_FILENAME_QUOTE_CHARACTERS
rb_secure(4);
if (rl_filename_quote_characters == NULL)
return Qnil;
return rb_tainted_str_new2(rl_filename_quote_characters);
#else
rb_notimplement();
return Qnil; /* not reached */
#endif /* HAVE_RL_FILENAME_QUOTE_CHARACTERS */
}
static VALUE
hist_to_s(VALUE self)
{
return rb_str_new2("HISTORY");
}
static int
history_get_offset_history_base(int offset)
{
return history_base + offset;
}
static int
history_get_offset_0(int offset)
{
return offset;
}
static VALUE
hist_get(VALUE self, VALUE index)
{
HIST_ENTRY *entry = NULL;
int i;
rb_secure(4);
i = NUM2INT(index);
if (i < 0) {
i += history_length;
}
if (i >= 0) {
entry = history_get(history_get_offset_func(i));
}
if (entry == NULL) {
rb_raise(rb_eIndexError, "invalid index");
}
return rb_tainted_str_new2(entry->line);
}
static VALUE
hist_set(VALUE self, VALUE index, VALUE str)
{
#ifdef HAVE_REPLACE_HISTORY_ENTRY
HIST_ENTRY *entry = NULL;
int i;
rb_secure(4);
i = NUM2INT(index);
SafeStringValue(str);
if (i < 0) {
i += history_length;
}
if (i >= 0) {
entry = replace_history_entry(i, RSTRING_PTR(str), NULL);
}
if (entry == NULL) {
rb_raise(rb_eIndexError, "invalid index");
}
return str;
#else
rb_notimplement();
return Qnil; /* not reached */
#endif
}
static VALUE
hist_push(VALUE self, VALUE str)
{
rb_secure(4);
SafeStringValue(str);
add_history(RSTRING_PTR(str));
return self;
}
static VALUE
hist_push_method(int argc, VALUE *argv, VALUE self)
{
VALUE str;
rb_secure(4);
while (argc--) {
str = *argv++;
SafeStringValue(str);
add_history(RSTRING_PTR(str));
}
return self;
}
static VALUE
rb_remove_history(int index)
{
#ifdef HAVE_REMOVE_HISTORY
HIST_ENTRY *entry;
VALUE val;
rb_secure(4);
entry = remove_history(index);
if (entry) {
val = rb_tainted_str_new2(entry->line);
free((void *) entry->line);
free(entry);
return val;
}
return Qnil;
#else
rb_notimplement();
return Qnil; /* not reached */
#endif
}
static VALUE
hist_pop(VALUE self)
{
rb_secure(4);
if (history_length > 0) {
return rb_remove_history(history_length - 1);
} else {
return Qnil;
}
}
static VALUE
hist_shift(VALUE self)
{
rb_secure(4);
if (history_length > 0) {
return rb_remove_history(0);
} else {
return Qnil;
}
}
static VALUE
hist_each(VALUE self)
{
HIST_ENTRY *entry;
int i;
RETURN_ENUMERATOR(self, 0, 0);
rb_secure(4);
for (i = 0; i < history_length; i++) {
entry = history_get(history_get_offset_func(i));
if (entry == NULL)
break;
rb_yield(rb_tainted_str_new2(entry->line));
}
return self;
}
static VALUE
hist_length(VALUE self)
{
rb_secure(4);
return INT2NUM(history_length);
}
static VALUE
hist_empty_p(VALUE self)
{
rb_secure(4);
return history_length == 0 ? Qtrue : Qfalse;
}
static VALUE
hist_delete_at(VALUE self, VALUE index)
{
int i;
rb_secure(4);
i = NUM2INT(index);
if (i < 0)
i += history_length;
if (i < 0 || i > history_length - 1) {
rb_raise(rb_eIndexError, "invalid index");
}
return rb_remove_history(i);
}
static VALUE
hist_clear(VALUE self)
{
#ifdef HAVE_CLEAR_HISTORY
rb_secure(4);
clear_history();
return self;
#else
rb_notimplement();
return Qnil; /* not reached */
#endif
}
static VALUE
filename_completion_proc_call(VALUE self, VALUE str)
{
VALUE result;
char **matches;
int i;
matches = rl_completion_matches(StringValuePtr(str),
rl_filename_completion_function);
if (matches) {
result = rb_ary_new();
for (i = 0; matches[i]; i++) {
rb_ary_push(result, rb_tainted_str_new2(matches[i]));
free(matches[i]);
}
free(matches);
if (RARRAY_LEN(result) >= 2)
rb_ary_shift(result);
}
else {
result = Qnil;
}
return result;
}
static VALUE
username_completion_proc_call(VALUE self, VALUE str)
{
VALUE result;
char **matches;
int i;
matches = rl_completion_matches(StringValuePtr(str),
rl_username_completion_function);
if (matches) {
result = rb_ary_new();
for (i = 0; matches[i]; i++) {
rb_ary_push(result, rb_tainted_str_new2(matches[i]));
free(matches[i]);
}
free(matches);
if (RARRAY_LEN(result) >= 2)
rb_ary_shift(result);
}
else {
result = Qnil;
}
return result;
}
void
Init_readline()
{
VALUE history, fcomp, ucomp;
/* Allow conditional parsing of the ~/.inputrc file. */
rl_readline_name = "Ruby";
using_history();
completion_proc = rb_intern(COMPLETION_PROC);
completion_case_fold = rb_intern(COMPLETION_CASE_FOLD);
mReadline = rb_define_module("Readline");
rb_define_module_function(mReadline, "readline",
readline_readline, -1);
rb_define_singleton_method(mReadline, "input=",
readline_s_set_input, 1);
rb_define_singleton_method(mReadline, "output=",
readline_s_set_output, 1);
rb_define_singleton_method(mReadline, "completion_proc=",
readline_s_set_completion_proc, 1);
rb_define_singleton_method(mReadline, "completion_proc",
readline_s_get_completion_proc, 0);
rb_define_singleton_method(mReadline, "completion_case_fold=",
readline_s_set_completion_case_fold, 1);
rb_define_singleton_method(mReadline, "completion_case_fold",
readline_s_get_completion_case_fold, 0);
rb_define_singleton_method(mReadline, "vi_editing_mode",
readline_s_vi_editing_mode, 0);
rb_define_singleton_method(mReadline, "emacs_editing_mode",
readline_s_emacs_editing_mode, 0);
rb_define_singleton_method(mReadline, "completion_append_character=",
readline_s_set_completion_append_character, 1);
rb_define_singleton_method(mReadline, "completion_append_character",
readline_s_get_completion_append_character, 0);
rb_define_singleton_method(mReadline, "basic_word_break_characters=",
readline_s_set_basic_word_break_characters, 1);
rb_define_singleton_method(mReadline, "basic_word_break_characters",
readline_s_get_basic_word_break_characters, 0);
rb_define_singleton_method(mReadline, "completer_word_break_characters=",
readline_s_set_completer_word_break_characters, 1);
rb_define_singleton_method(mReadline, "completer_word_break_characters",
readline_s_get_completer_word_break_characters, 0);
rb_define_singleton_method(mReadline, "basic_quote_characters=",
readline_s_set_basic_quote_characters, 1);
rb_define_singleton_method(mReadline, "basic_quote_characters",
readline_s_get_basic_quote_characters, 0);
rb_define_singleton_method(mReadline, "completer_quote_characters=",
readline_s_set_completer_quote_characters, 1);
rb_define_singleton_method(mReadline, "completer_quote_characters",
readline_s_get_completer_quote_characters, 0);
rb_define_singleton_method(mReadline, "filename_quote_characters=",
readline_s_set_filename_quote_characters, 1);
rb_define_singleton_method(mReadline, "filename_quote_characters",
readline_s_get_filename_quote_characters, 0);
history = rb_obj_alloc(rb_cObject);
rb_extend_object(history, rb_mEnumerable);
rb_define_singleton_method(history,"to_s", hist_to_s, 0);
rb_define_singleton_method(history,"[]", hist_get, 1);
rb_define_singleton_method(history,"[]=", hist_set, 2);
rb_define_singleton_method(history,"<<", hist_push, 1);
rb_define_singleton_method(history,"push", hist_push_method, -1);
rb_define_singleton_method(history,"pop", hist_pop, 0);
rb_define_singleton_method(history,"shift", hist_shift, 0);
rb_define_singleton_method(history,"each", hist_each, 0);
rb_define_singleton_method(history,"length", hist_length, 0);
rb_define_singleton_method(history,"size", hist_length, 0);
rb_define_singleton_method(history,"empty?", hist_empty_p, 0);
rb_define_singleton_method(history,"delete_at", hist_delete_at, 1);
rb_define_singleton_method(history,"clear", hist_clear, 0);
rb_define_const(mReadline, "HISTORY", history);
fcomp = rb_obj_alloc(rb_cObject);
rb_define_singleton_method(fcomp, "call",
filename_completion_proc_call, 1);
rb_define_const(mReadline, "FILENAME_COMPLETION_PROC", fcomp);
ucomp = rb_obj_alloc(rb_cObject);
rb_define_singleton_method(ucomp, "call",
username_completion_proc_call, 1);
rb_define_const(mReadline, "USERNAME_COMPLETION_PROC", ucomp);
history_get_offset_func = history_get_offset_history_base;
#if defined HAVE_RL_LIBRARY_VERSION
rb_define_const(mReadline, "VERSION", rb_str_new2(rl_library_version));
#if defined HAVE_CLEAR_HISTORY
if (strncmp(rl_library_version, EDIT_LINE_LIBRARY_VERSION,
strlen(EDIT_LINE_LIBRARY_VERSION)) == 0) {
add_history("1");
if (history_get(history_get_offset_func(0)) == NULL) {
history_get_offset_func = history_get_offset_0;
}
clear_history();
}
#endif
#else
rb_define_const(mReadline, "VERSION", rb_str_new2("2.0 or prior version"));
#endif
rl_attempted_completion_function = readline_attempted_completion_function;
#ifdef HAVE_RL_EVENT_HOOK
rl_event_hook = readline_event;
#endif
#ifdef HAVE_RL_CLEAR_SIGNALS
rl_clear_signals();
#endif
}
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