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mruby-io/io.c: implement IO#seek in C

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This commit is contained in:
Yukihiro "Matz" Matsumoto
2022-12-29 18:00:05 +09:00
parent 14a374c6bc
commit d905746218
2 changed files with 10 additions and 7 deletions
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mrbgems/mruby-io/mrblib/io.rb
-7
View File
@@ -116,13 +116,6 @@ class IO
seek(0, SEEK_SET)
end
def seek(i, whence = SEEK_SET)
raise IOError if closed?
sysseek(i, whence)
@buf = ''
0
end
def ungetc(substr)
raise TypeError.new "expect String, got #{substr.class}" unless substr.is_a?(String)
if @buf.empty?
mrbgems/mruby-io/src/io.c
+10
View File
@@ -998,6 +998,15 @@ io_sysseek(mrb_state *mrb, mrb_value io)
return mrb_int_value(mrb, (mrb_int)pos);
}
static mrb_value
io_seek(mrb_state *mrb, mrb_value io)
{
mrb_value pos = io_sysseek(mrb, io);
mrb_value buf = mrb_iv_get(mrb, io, MRB_IVSYM(buf));
mrb_str_resize(mrb, buf, 0);
return pos;
}
static mrb_value
io_syswrite_common(mrb_state *mrb,
fssize_t (*writefunc)(int, const void*, fsize_t, off_t),
@@ -1621,6 +1630,7 @@ mrb_init_io(mrb_state *mrb)
mrb_define_method(mrb, io, "sysread", io_sysread, MRB_ARGS_ARG(1,1));
mrb_define_method(mrb, io, "sysseek", io_sysseek, MRB_ARGS_ARG(1,1));
mrb_define_method(mrb, io, "syswrite", io_syswrite, MRB_ARGS_REQ(1));
mrb_define_method(mrb, io, "seek", io_seek, MRB_ARGS_ARG(1,1));
mrb_define_method(mrb, io, "close", io_close, MRB_ARGS_NONE()); /* 15.2.20.5.1 */
mrb_define_method(mrb, io, "close_write", io_close_write, MRB_ARGS_NONE());
mrb_define_method(mrb, io, "close_on_exec=", io_set_close_on_exec, MRB_ARGS_REQ(1));