picrin/load.c

80 lines
1.4 KiB
C

/**
* See Copyright Notice in picrin.h
*/
#include "picrin.h"
#include "picrin/pair.h"
#include "picrin/port.h"
#include "picrin/error.h"
static void
pic_load_port(pic_state *pic, struct pic_port *port)
{
pic_value form;
pic_try {
size_t ai = pic_gc_arena_preserve(pic);
while (! pic_eof_p(form = pic_read(pic, port))) {
pic_eval(pic, form, pic->lib);
pic_gc_arena_restore(pic, ai);
}
}
pic_catch {
pic_errorf(pic, "load error: %s", pic_errmsg(pic));
}
}
void
pic_load_cstr(pic_state *pic, const char *src)
{
struct pic_port *port = pic_open_input_string(pic, src);
pic_load_port(pic, port);
pic_close_port(pic, port);
}
void
pic_load(pic_state *pic, const char *filename)
{
struct pic_port *port;
xFILE *file;
file = xfopen(filename, "r");
if (file == NULL) {
pic_errorf(pic, "could not open file: %s", filename);
}
port = (struct pic_port *)pic_obj_alloc(pic, sizeof(struct pic_port), PIC_TT_PORT);
port->file = file;
port->flags = PIC_PORT_IN | PIC_PORT_TEXT;
port->status = PIC_PORT_OPEN;
pic_load_port(pic, port);
pic_close_port(pic, port);
}
static pic_value
pic_load_load(pic_state *pic)
{
pic_value envid;
char *fn;
pic_get_args(pic, "z|o", &fn, &envid);
pic_load(pic, fn);
return pic_none_value();
}
void
pic_init_load(pic_state *pic)
{
pic_deflibrary (pic, "(scheme load)") {
pic_defun(pic, "load", pic_load_load);
}
}