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adding i/o port primitives

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Alex Shinn 2009-03-11 18:33:49 +09:00
parent 13a161e797
commit 865e7667f4
1 changed files with 19 additions and 0 deletions
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19
eval.c
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@ -1073,6 +1073,21 @@ sexp vm(bytecode bc, env e, sexp* stack, unsigned int top) {
return stack[top-1];
}
/************************ library procedures **************************/
sexp sexp_open_input_file (sexp path) {
return sexp_make_input_port(fopen(sexp_string_data(path), "r"));
}
sexp sexp_open_output_file (sexp path) {
return sexp_make_input_port(fopen(sexp_string_data(path), "w"));
}
sexp sexp_close_port (sexp port) {
fclose(sexp_port_stream(port));
return SEXP_UNDEF;
}
/*********************** standard environment *************************/
static const struct core_form core_forms[] = {
@ -1138,6 +1153,10 @@ _OP(OPC_GENERIC, OP_ERROR, 1, SEXP_STRING, 0, 0, 0, "error"),
{SEXP_OPCODE, OPC_IO, OP_READ_CHAR, 0, 1, 0, SEXP_IPORT, 0, "read-char", (sexp)&cur_input_port, NULL},
_FN1(SEXP_PAIR, "reverse", sexp_reverse),
_FN1(SEXP_PAIR, "list->vector", sexp_list_to_vector),
_FN1(SEXP_STRING, "open-input-file", sexp_open_input_file),
_FN1(SEXP_STRING, "open-output-file", sexp_open_output_file),
_FN1(SEXP_IPORT, "close-input-port", sexp_close_port),
_FN1(SEXP_OPORT, "close-output-port", sexp_close_port),
_FN2(0, SEXP_PAIR, "memq", sexp_memq),
_FN2(0, SEXP_PAIR, "assq", sexp_assq),
_FN2(SEXP_PAIR, SEXP_PAIR, "diffq", sexp_lset_diff),