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refactor string.c

This commit is contained in:
Yuichi Nishiwaki 2014-09-09 01:23:58 +09:00
parent ce1d5c0653
commit 5331d6f23c
1 changed files with 19 additions and 46 deletions
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65
string.c
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@ -38,19 +38,14 @@ pic_str *
pic_str_new_fill(pic_state *pic, size_t len, char fill)
{
size_t i;
char *cstr;
pic_str *str;
char buf[len + 1];
cstr = (char *)pic_alloc(pic, len + 1);
cstr[len] = '\0';
for (i = 0; i < len; ++i) {
cstr[i] = fill;
buf[i] = fill;
}
buf[i] = '\0';
str = pic_str_new(pic, cstr, len);
pic_free(pic, cstr);
return str;
return pic_str_new(pic, buf, len);
}
size_t
@ -71,45 +66,24 @@ pic_str_ref(pic_state *pic, pic_str *str, size_t i)
return (char)c;
}
static xrope *
xr_put(xrope *rope, size_t i, char c)
{
xrope *x, *y, *z;
char buf[2];
if (xr_len(rope) <= i) {
return NULL;
}
buf[0] = c;
buf[1] = '\0';
x = xr_sub(rope, 0, i);
y = xr_new_copy(buf, 1);
z = xr_cat(x, y);
XROPE_DECREF(x);
XROPE_DECREF(y);
x = z;
y = xr_sub(rope, i + 1, xr_len(rope));
z = xr_cat(z, y);
XROPE_DECREF(x);
XROPE_DECREF(y);
return z;
}
void
pic_str_set(pic_state *pic, pic_str *str, size_t i, char c)
{
xrope *x;
pic_str *x, *y, *z, *tmp;
x = xr_put(str->rope, i, c);
if (x == NULL) {
if (pic_strlen(str) <= i) {
pic_errorf(pic, "index out of range %d", i);
}
x = pic_substr(pic, str, 0, i);
y = pic_str_new_fill(pic, 1, c);
z = pic_substr(pic, str, i + 1, pic_strlen(str));
tmp = pic_strcat(pic, x, pic_strcat(pic, y, z));
XROPE_INCREF(tmp->rope);
XROPE_DECREF(str->rope);
str->rope = x;
str->rope = tmp->rope;
}
pic_str *
@ -443,15 +417,14 @@ pic_init_str(pic_state *pic)
pic_defun(pic, "string-length", pic_str_string_length);
pic_defun(pic, "string-ref", pic_str_string_ref);
pic_defun(pic, "string-set!", pic_str_string_set);
pic_defun(pic, "string-copy", pic_str_string_copy);
pic_defun(pic, "string-copy!", pic_str_string_copy_ip);
pic_defun(pic, "string-append", pic_str_string_append);
pic_defun(pic, "string-fill!", pic_str_string_fill_ip);
pic_defun(pic, "string=?", pic_str_string_eq);
pic_defun(pic, "string<?", pic_str_string_lt);
pic_defun(pic, "string>?", pic_str_string_gt);
pic_defun(pic, "string<=?", pic_str_string_le);
pic_defun(pic, "string>=?", pic_str_string_ge);
pic_defun(pic, "string-copy", pic_str_string_copy);
pic_defun(pic, "string-copy!", pic_str_string_copy_ip);
pic_defun(pic, "string-append", pic_str_string_append);
pic_defun(pic, "string-fill!", pic_str_string_fill_ip);
}