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ruby--ruby/ext/readline/readline.c

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/* readline.c -- GNU Readline module
Copyright (C) 1997-1998 Shugo Maeda */
#include <stdio.h>
#include <readline/readline.h>
#include <readline/history.h>
#include "ruby.h"
#include "rubysig.h"
static VALUE mReadline;
#define TOLOWER(c) (isupper(c) ? tolower(c) : c)
#define COMPLETION_PROC "completion_proc"
#define COMPLETION_CASE_FOLD "completion_case_fold"
static int
readline_event()
{
CHECK_INTS;
#ifdef USE_THREAD
rb_thread_schedule();
#endif
}
static VALUE
readline_readline(int argc, VALUE *argv, VALUE self)
{
VALUE tmp, add_hist, result;
char *prompt = NULL;
char *buff;
if (rb_scan_args(argc, argv, "02", &tmp, &add_hist) > 0) {
prompt = STR2CSTR(tmp);
}
buff = readline(prompt);
if (RTEST(add_hist) && buff) {
add_history(buff);
}
if (buff)
result = rb_str_new2(buff);
else
result = Qnil;
if (buff) free(buff);
return result;
}
static VALUE
readline_s_set_completion_proc(VALUE self, VALUE proc)
{
if (!rb_respond_to(proc, rb_intern("call")))
rb_raise(rb_eArgError, "argument have to respond to `call'");
return rb_iv_set(mReadline, COMPLETION_PROC, proc);
}
static VALUE
readline_s_get_completion_proc(VALUE self)
{
return rb_iv_get(mReadline, COMPLETION_PROC);
}
static VALUE
readline_s_set_completion_case_fold(VALUE self, VALUE val)
{
return rb_iv_set(mReadline, COMPLETION_CASE_FOLD, val);
}
static VALUE
readline_s_get_completion_case_fold(VALUE self)
{
return rb_iv_get(mReadline, COMPLETION_CASE_FOLD);
}
static char **
readline_attempted_completion_function(char *text, int start, int end)
{
VALUE proc, ary, temp;
char **result;
int case_fold;
int i, matches;
proc = rb_iv_get(mReadline, COMPLETION_PROC);
rl_attempted_completion_over = 1;
case_fold = RTEST(rb_iv_get(mReadline, COMPLETION_CASE_FOLD));
ary = rb_funcall(proc, rb_intern("call"), 1, rb_str_new2(text));
if (TYPE(ary) != T_ARRAY)
ary = rb_Array(ary);
matches = RARRAY(ary)->len;
if (matches == 0)
return NULL;
result = ALLOC_N(char *, matches + 2);
for (i = 0; i < matches; i++) {
temp = rb_obj_as_string(RARRAY(ary)->ptr[i]);
result[i + 1] = ALLOC_N(char, RSTRING(temp)->len + 1);
strcpy(result[i + 1], RSTRING(temp)->ptr);
}
result[matches + 1] = NULL;
if (matches == 1) {
result[0] = result[1];
result[1] = NULL;
} 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)
{
rl_vi_editing_mode();
return Qnil;
}
static VALUE
readline_s_emacs_editing_mode(VALUE self)
{
rl_emacs_editing_mode();
return Qnil;
}
static VALUE
hist_to_s(VALUE self)
{
return rb_str_new2("HISTORY");
}
static VALUE
hist_get(VALUE self, VALUE index)
{
HISTORY_STATE *state;
int i;
state = history_get_history_state();
i = NUM2INT(index);
if (i < 0 || i > state->length - 1) {
rb_raise(rb_eIndexError, "Invalid index");
}
return rb_str_new2(state->entries[i]->line);
}
static VALUE
hist_set(VALUE self, VALUE index, VALUE str)
{
HISTORY_STATE *state;
int i;
state = history_get_history_state();
i = NUM2INT(index);
if (i < 0 || i > state->length - 1) {
rb_raise(rb_eIndexError, "Invalid index");
}
replace_history_entry(i, STR2CSTR(str), NULL);
return str;
}
static VALUE
hist_push(VALUE self, VALUE str)
{
add_history(STR2CSTR(str));
return self;
}
static VALUE
hist_push_method(int argc, VALUE *argv,
VALUE self)
{
VALUE str;
while (argc--) {
str = *argv++;
add_history(STR2CSTR(str));
}
return self;
}
static VALUE
hist_pop(VALUE self)
{
HISTORY_STATE *state;
HIST_ENTRY *entry;
state = history_get_history_state();
if (state->length > 0) {
entry = remove_history(state->length - 1);
return rb_str_new2(entry->line);
} else {
return Qnil;
}
}
static VALUE
hist_shift(VALUE self)
{
HISTORY_STATE *state;
HIST_ENTRY *entry;
state = history_get_history_state();
if (state->length > 0) {
entry = remove_history(0);
return rb_str_new2(entry->line);
} else {
return Qnil;
}
}
static VALUE
hist_each(VALUE self)
{
HISTORY_STATE *state;
int i;
state = history_get_history_state();
for (i = 0; i < state->length; i++) {
rb_yield(rb_str_new2(state->entries[i]->line));
}
return Qnil;
}
static VALUE
hist_length(VALUE self)
{
HISTORY_STATE *state;
state = history_get_history_state();
return INT2NUM(state->length);
}
static VALUE
hist_empty_p(VALUE self)
{
HISTORY_STATE *state;
state = history_get_history_state();
if (state->length == 0)
return Qtrue;
else
return Qfalse;
}
static VALUE
hist_delete_at(VALUE self, VALUE index)
{
HISTORY_STATE *state;
HIST_ENTRY *entry;
int i;
state = history_get_history_state();
i = NUM2INT(index);
if (i < 0 || i > state->length - 1) {
rb_raise(rb_eIndexError, "Invalid index");
}
entry = remove_history(NUM2INT(index));
return rb_str_new2(entry->line);
}
static VALUE
filename_completion_proc_call(VALUE self, VALUE str)
{
VALUE result;
char **matches;
int i;
matches = completion_matches(STR2CSTR(str),
filename_completion_function);
if (matches) {
result = rb_ary_new();
for (i = 0; matches[i]; i++) {
rb_ary_push(result, rb_str_new2(matches[i]));
free(matches[i]);
}
free(matches);
if (RARRAY(result)->len >= 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 = completion_matches(STR2CSTR(str),
username_completion_function);
if (matches) {
result = rb_ary_new();
for (i = 0; matches[i]; i++) {
rb_ary_push(result, rb_str_new2(matches[i]));
free(matches[i]);
}
free(matches);
if (RARRAY(result)->len >= 2)
rb_ary_shift(result);
}
else {
result = Qnil;
}
return result;
}
void
Init_readline(void)
{
VALUE histary, fcomp, ucomp;
using_history();
mReadline = rb_define_module("Readline");
rb_define_module_function(mReadline, "readline",
readline_readline, -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);
histary = rb_obj_alloc(rb_cObject);
rb_extend_object(histary, rb_mEnumerable);
rb_define_singleton_method(histary,"to_s", hist_to_s, 0);
rb_define_singleton_method(histary,"[]", hist_get, 1);
rb_define_singleton_method(histary,"[]=", hist_set, 2);
rb_define_singleton_method(histary,"<<", hist_push, 1);
rb_define_singleton_method(histary,"push", hist_push_method, -1);
rb_define_singleton_method(histary,"pop", hist_pop, 0);
rb_define_singleton_method(histary,"shift", hist_shift, 0);
rb_define_singleton_method(histary,"each", hist_each, 0);
rb_define_singleton_method(histary,"length", hist_length, 0);
rb_define_singleton_method(histary,"empty?", hist_empty_p, 0);
rb_define_singleton_method(histary,"delete_at", hist_delete_at, 1);
rb_define_const(mReadline, "HISTORY", histary);
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);
rl_attempted_completion_function
= (CPPFunction *) readline_attempted_completion_function;
rl_event_hook = readline_event;
rl_clear_signals();
}
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