118 lines
2.4 KiB
C
118 lines
2.4 KiB
C
/**
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* See Copyright Notice in picrin.h
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*/
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#include "picrin.h"
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#include "picrin/port.h"
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#include "picrin/error.h"
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static noreturn void
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file_error(pic_state *pic, const char *msg)
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{
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pic_throw(pic, pic->sFILE, msg, pic_nil_value());
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}
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static pic_value
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generic_open_file(pic_state *pic, const char *fname, char *mode, short flags)
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{
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struct pic_port *port;
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xFILE *file;
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file = xfopen(fname, mode);
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if (! file) {
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file_error(pic, "could not open file");
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}
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port = (struct pic_port *)pic_obj_alloc(pic, sizeof(struct pic_port), PIC_TT_PORT);
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port->file = file;
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port->flags = flags;
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port->status = PIC_PORT_OPEN;
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return pic_obj_value(port);
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}
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pic_value
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pic_file_open_input_file(pic_state *pic)
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{
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static const short flags = PIC_PORT_IN | PIC_PORT_TEXT;
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char *fname;
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pic_get_args(pic, "z", &fname);
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return generic_open_file(pic, fname, "r", flags);
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}
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pic_value
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pic_file_open_binary_input_file(pic_state *pic)
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{
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static const short flags = PIC_PORT_IN | PIC_PORT_BINARY;
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char *fname;
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pic_get_args(pic, "z", &fname);
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return generic_open_file(pic, fname, "rb", flags);
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}
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pic_value
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pic_file_open_output_file(pic_state *pic)
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{
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static const short flags = PIC_PORT_OUT | PIC_PORT_TEXT;
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char *fname;
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pic_get_args(pic, "z", &fname);
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return generic_open_file(pic, fname, "w", flags);
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}
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pic_value
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pic_file_open_binary_output_file(pic_state *pic)
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{
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static const short flags = PIC_PORT_OUT | PIC_PORT_BINARY;
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char *fname;
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pic_get_args(pic, "z", &fname);
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return generic_open_file(pic, fname, "wb", flags);
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}
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pic_value
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pic_file_exists_p(pic_state *pic)
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{
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char *fname;
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FILE *fp;
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pic_get_args(pic, "z", &fname);
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fp = fopen(fname, "r");
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if (fp) {
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fclose(fp);
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return pic_true_value();
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} else {
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return pic_false_value();
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}
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}
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pic_value
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pic_file_delete(pic_state *pic)
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{
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char *fname;
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pic_get_args(pic, "z", &fname);
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if (remove(fname) != 0) {
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file_error(pic, "file cannot be deleted");
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}
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return pic_none_value();
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}
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void
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pic_init_file(pic_state *pic)
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{
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pic_defun(pic, "open-input-file", pic_file_open_input_file);
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pic_defun(pic, "open-binary-input-file", pic_file_open_binary_input_file);
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pic_defun(pic, "open-output-file", pic_file_open_output_file);
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pic_defun(pic, "open-binary-output-file", pic_file_open_binary_output_file);
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pic_defun(pic, "file-exists?", pic_file_exists_p);
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pic_defun(pic, "delete-file", pic_file_delete);
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}
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