809 lines
18 KiB
C
809 lines
18 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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pic_value
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pic_eof_object()
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{
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pic_value v;
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pic_init_value(v, PIC_VTYPE_EOF);
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return v;
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}
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static pic_value
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pic_assert_port(pic_state *pic)
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{
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struct pic_port *port;
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pic_get_args(pic, "p", &port);
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return pic_obj_value(port);
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}
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/* current-(input|output|error)-port */
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static void
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pic_define_standard_port(pic_state *pic, const char *name, xFILE *file, int dir)
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{
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struct pic_port *port;
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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 = dir | PIC_PORT_TEXT | PIC_PORT_OPEN;
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pic_defvar(pic, name, pic_obj_value(port), pic_make_proc(pic, pic_assert_port, "pic_assert_port"));
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}
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#define DEFINE_STANDARD_PORT_ACCESSOR(name, var) \
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struct pic_port * \
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name(pic_state *pic) \
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{ \
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pic_value obj; \
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\
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obj = pic_funcall0(pic, pic->PICRIN_BASE, var); \
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\
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return pic_port_ptr(obj); \
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}
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DEFINE_STANDARD_PORT_ACCESSOR(pic_stdin, "current-input-port")
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DEFINE_STANDARD_PORT_ACCESSOR(pic_stdout, "current-output-port")
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DEFINE_STANDARD_PORT_ACCESSOR(pic_stderr, "current-error-port")
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struct strfile {
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pic_state *pic;
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char *buf;
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long pos, end, capa;
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};
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static int
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string_read(void *cookie, char *ptr, int size)
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{
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struct strfile *m = cookie;
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if (size > (int)(m->end - m->pos))
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size = (int)(m->end - m->pos);
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memcpy(ptr, m->buf + m->pos, size);
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m->pos += size;
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return size;
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}
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static int
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string_write(void *cookie, const char *ptr, int size)
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{
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struct strfile *m = cookie;
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if (m->pos + size >= m->capa) {
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m->capa = (m->pos + size) * 2;
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m->buf = pic_realloc(m->pic, m->buf, (size_t)m->capa);
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}
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memcpy(m->buf + m->pos, ptr, size);
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m->pos += size;
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if (m->end < m->pos)
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m->end = m->pos;
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return size;
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}
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static long
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string_seek(void *cookie, long pos, int whence)
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{
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struct strfile *m = cookie;
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switch (whence) {
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case XSEEK_SET:
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m->pos = pos;
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break;
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case XSEEK_CUR:
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m->pos += pos;
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break;
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case XSEEK_END:
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m->pos = m->end + pos;
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break;
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}
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return m->pos;
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}
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static int
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string_close(void *cookie)
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{
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struct strfile *m = cookie;
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pic_free(m->pic, m->buf);
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pic_free(m->pic, m);
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return 0;
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}
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static xFILE *
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string_open(pic_state *pic, const char *data, size_t size)
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{
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struct strfile *m;
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xFILE *file;
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m = pic_malloc(pic, sizeof(struct strfile));
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m->pic = pic;
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m->buf = pic_malloc(pic, size);
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m->pos = 0;
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m->end = size;
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m->capa = size;
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if (data != NULL) {
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memcpy(m->buf, data, size);
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file = xfunopen(m, string_read, NULL, string_seek, string_close);
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} else {
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file = xfunopen(m, NULL, string_write, string_seek, string_close);
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}
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if (file == NULL) {
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string_close(m);
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pic_error(pic, "could not open new output string/bytevector port", pic_nil_value());
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}
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return file;
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}
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struct pic_port *
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pic_open_input_string(pic_state *pic, const char *str)
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{
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struct pic_port *port;
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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 = string_open(pic, str, strlen(str));
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port->flags = PIC_PORT_IN | PIC_PORT_TEXT | PIC_PORT_OPEN;
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return port;
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}
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struct pic_port *
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pic_open_output_string(pic_state *pic)
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{
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struct pic_port *port;
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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 = string_open(pic, NULL, 0);
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port->flags = PIC_PORT_OUT | PIC_PORT_TEXT | PIC_PORT_OPEN;
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return port;
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}
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struct pic_string *
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pic_get_output_string(pic_state *pic, struct pic_port *port)
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{
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struct strfile *s;
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if (port->file->vtable.write != string_write) {
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pic_errorf(pic, "get-output-string: port is not made by open-output-string");
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}
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xfflush(port->file);
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s = port->file->vtable.cookie;
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return pic_make_str(pic, s->buf, s->end);
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}
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void
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pic_close_port(pic_state *pic, struct pic_port *port)
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{
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if (xfclose(port->file) == EOF) {
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pic_errorf(pic, "close-port: failure");
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}
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port->flags &= ~PIC_PORT_OPEN;
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}
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static pic_value
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pic_port_call_with_port(pic_state *pic)
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{
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struct pic_port *port;
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struct pic_proc *proc;
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pic_value value;
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pic_get_args(pic, "pl", &port, &proc);
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value = pic_apply1(pic, proc, pic_obj_value(port));
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pic_close_port(pic, port);
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return value;
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}
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static pic_value
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pic_port_input_port_p(pic_state *pic)
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{
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pic_value v;
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pic_get_args(pic, "o", &v);
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if (pic_port_p(v) && (pic_port_ptr(v)->flags & PIC_PORT_IN) != 0) {
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return pic_true_value();
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}
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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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static pic_value
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pic_port_output_port_p(pic_state *pic)
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{
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pic_value v;
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pic_get_args(pic, "o", &v);
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if (pic_port_p(v) && (pic_port_ptr(v)->flags & PIC_PORT_OUT) != 0) {
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return pic_true_value();
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}
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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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static pic_value
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pic_port_textual_port_p(pic_state *pic)
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{
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pic_value v;
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pic_get_args(pic, "o", &v);
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if (pic_port_p(v) && (pic_port_ptr(v)->flags & PIC_PORT_TEXT) != 0) {
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return pic_true_value();
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}
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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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static pic_value
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pic_port_binary_port_p(pic_state *pic)
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{
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pic_value v;
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pic_get_args(pic, "o", &v);
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if (pic_port_p(v) && (pic_port_ptr(v)->flags & PIC_PORT_BINARY) != 0) {
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return pic_true_value();
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}
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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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static pic_value
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pic_port_port_p(pic_state *pic)
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{
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pic_value v;
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pic_get_args(pic, "o", &v);
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return pic_bool_value(pic_port_p(v));
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}
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static pic_value
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pic_port_eof_object_p(pic_state *pic)
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{
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pic_value v;
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pic_get_args(pic, "o", &v);
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if (pic_vtype(v) == PIC_VTYPE_EOF) {
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return pic_true_value();
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}
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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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static pic_value
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pic_port_eof_object(pic_state *pic)
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{
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pic_get_args(pic, "");
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return pic_eof_object();
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}
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static pic_value
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pic_port_port_open_p(pic_state *pic)
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{
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struct pic_port *port;
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pic_get_args(pic, "p", &port);
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return pic_bool_value(port->flags & PIC_PORT_OPEN);
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}
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static pic_value
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pic_port_close_port(pic_state *pic)
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{
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struct pic_port *port;
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pic_get_args(pic, "p", &port);
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pic_close_port(pic, port);
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return pic_undef_value();
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}
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#define assert_port_profile(port, flgs, caller) do { \
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if ((port->flags & (flgs)) != (flgs)) { \
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switch (flgs) { \
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case PIC_PORT_IN: \
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pic_errorf(pic, caller ": expected output port"); \
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case PIC_PORT_OUT: \
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pic_errorf(pic, caller ": expected input port"); \
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case PIC_PORT_IN | PIC_PORT_TEXT: \
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pic_errorf(pic, caller ": expected input/textual port"); \
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case PIC_PORT_IN | PIC_PORT_BINARY: \
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pic_errorf(pic, caller ": expected input/binary port"); \
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case PIC_PORT_OUT | PIC_PORT_TEXT: \
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pic_errorf(pic, caller ": expected output/textual port"); \
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case PIC_PORT_OUT | PIC_PORT_BINARY: \
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pic_errorf(pic, caller ": expected output/binary port"); \
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} \
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} \
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if ((port->flags & PIC_PORT_OPEN) == 0) { \
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pic_errorf(pic, caller ": expected open port"); \
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} \
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} while (0)
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static pic_value
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pic_port_open_input_string(pic_state *pic)
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{
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struct pic_port *port;
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char *str;
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pic_get_args(pic, "z", &str);
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port = pic_open_input_string(pic, str);
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return pic_obj_value(port);
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}
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static pic_value
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pic_port_open_output_string(pic_state *pic)
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{
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struct pic_port *port;
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pic_get_args(pic, "");
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port = pic_open_output_string(pic);
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return pic_obj_value(port);
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}
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static pic_value
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pic_port_get_output_string(pic_state *pic)
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{
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struct pic_port *port = pic_stdout(pic);
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pic_get_args(pic, "|p", &port);
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assert_port_profile(port, PIC_PORT_OUT | PIC_PORT_TEXT, "get-output-string");
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return pic_obj_value(pic_get_output_string(pic, port));
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}
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static pic_value
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pic_port_open_input_blob(pic_state *pic)
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{
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struct pic_port *port;
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struct pic_blob *blob;
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pic_get_args(pic, "b", &blob);
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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 = string_open(pic, (const char *)blob->data, blob->len);
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port->flags = PIC_PORT_IN | PIC_PORT_BINARY | PIC_PORT_OPEN;
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return pic_obj_value(port);
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}
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static pic_value
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pic_port_open_output_bytevector(pic_state *pic)
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{
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struct pic_port *port;
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pic_get_args(pic, "");
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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 = string_open(pic, NULL, 0);
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port->flags = PIC_PORT_OUT | PIC_PORT_BINARY | PIC_PORT_OPEN;
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return pic_obj_value(port);
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}
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static pic_value
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pic_port_get_output_bytevector(pic_state *pic)
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{
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struct pic_port *port = pic_stdout(pic);
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pic_blob *blob;
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struct strfile *s;
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pic_get_args(pic, "|p", &port);
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assert_port_profile(port, PIC_PORT_OUT | PIC_PORT_BINARY, "get-output-bytevector");
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if (port->file->vtable.write != string_write) {
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pic_errorf(pic, "get-output-bytevector: port is not made by open-output-bytevector");
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}
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xfflush(port->file);
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s = port->file->vtable.cookie;
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blob = pic_make_blob(pic, s->end);
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memcpy(blob->data, s->buf, s->end);
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return pic_obj_value(blob);
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}
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static pic_value
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pic_port_read_char(pic_state *pic)
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{
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int c;
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struct pic_port *port = pic_stdin(pic);
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pic_get_args(pic, "|p", &port);
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assert_port_profile(port, PIC_PORT_IN | PIC_PORT_TEXT, "read-char");
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if ((c = xfgetc(port->file)) == EOF) {
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return pic_eof_object();
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}
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else {
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return pic_char_value((char)c);
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}
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}
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static pic_value
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pic_port_peek_char(pic_state *pic)
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{
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int c;
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struct pic_port *port = pic_stdin(pic);
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pic_get_args(pic, "|p", &port);
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assert_port_profile(port, PIC_PORT_IN | PIC_PORT_TEXT, "peek-char");
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if ((c = xfgetc(port->file)) == EOF) {
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return pic_eof_object();
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}
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else {
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xungetc(c, port->file);
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return pic_char_value((char)c);
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}
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}
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static pic_value
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pic_port_read_line(pic_state *pic)
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{
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int c;
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struct pic_port *port = pic_stdin(pic), *buf;
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struct pic_string *str;
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pic_get_args(pic, "|p", &port);
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assert_port_profile(port, PIC_PORT_IN | PIC_PORT_TEXT, "read-line");
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buf = pic_open_output_string(pic);
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while ((c = xfgetc(port->file)) != EOF && c != '\n') {
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xfputc(c, buf->file);
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}
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str = pic_get_output_string(pic, buf);
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if (pic_str_len(str) == 0 && c == EOF) {
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return pic_eof_object();
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}
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else {
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return pic_obj_value(str);
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}
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}
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static pic_value
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pic_port_char_ready_p(pic_state *pic)
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{
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struct pic_port *port = pic_stdin(pic);
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assert_port_profile(port, PIC_PORT_IN | PIC_PORT_TEXT, "char-ready?");
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pic_get_args(pic, "|p", &port);
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return pic_true_value(); /* FIXME: always returns #t */
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}
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static pic_value
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pic_port_read_string(pic_state *pic){
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struct pic_port *port = pic_stdin(pic), *buf;
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pic_str *str;
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int k, i;
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int c;
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pic_get_args(pic, "i|p", &k, &port);
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assert_port_profile(port, PIC_PORT_IN | PIC_PORT_TEXT, "read-stritg");
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c = EOF;
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buf = pic_open_output_string(pic);
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for(i = 0; i < k; ++i) {
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if((c = xfgetc(port->file)) == EOF){
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break;
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}
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xfputc(c, buf->file);
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}
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str = pic_get_output_string(pic, buf);
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if (pic_str_len(str) == 0 && c == EOF) {
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return pic_eof_object();
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}
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else {
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return pic_obj_value(str);
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}
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}
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static pic_value
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pic_port_read_byte(pic_state *pic){
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struct pic_port *port = pic_stdin(pic);
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int c;
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pic_get_args(pic, "|p", &port);
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assert_port_profile(port, PIC_PORT_IN | PIC_PORT_BINARY, "read-u8");
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if ((c = xfgetc(port->file)) == EOF) {
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return pic_eof_object();
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}
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return pic_int_value(c);
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}
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static pic_value
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pic_port_peek_byte(pic_state *pic)
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{
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int c;
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struct pic_port *port = pic_stdin(pic);
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|
|
|
pic_get_args(pic, "|p", &port);
|
|
|
|
assert_port_profile(port, PIC_PORT_IN | PIC_PORT_BINARY, "peek-u8");
|
|
|
|
c = xfgetc(port->file);
|
|
if (c == EOF) {
|
|
return pic_eof_object();
|
|
}
|
|
else {
|
|
xungetc(c, port->file);
|
|
return pic_int_value(c);
|
|
}
|
|
}
|
|
|
|
static pic_value
|
|
pic_port_byte_ready_p(pic_state *pic)
|
|
{
|
|
struct pic_port *port = pic_stdin(pic);
|
|
|
|
pic_get_args(pic, "|p", &port);
|
|
|
|
assert_port_profile(port, PIC_PORT_IN | PIC_PORT_BINARY, "u8-ready?");
|
|
|
|
return pic_true_value(); /* FIXME: always returns #t */
|
|
}
|
|
|
|
|
|
static pic_value
|
|
pic_port_read_blob(pic_state *pic)
|
|
{
|
|
struct pic_port *port = pic_stdin(pic);
|
|
pic_blob *blob;
|
|
size_t k, i;
|
|
|
|
pic_get_args(pic, "k|p", &k, &port);
|
|
|
|
assert_port_profile(port, PIC_PORT_IN | PIC_PORT_BINARY, "read-bytevector");
|
|
|
|
blob = pic_make_blob(pic, k);
|
|
|
|
i = xfread(blob->data, sizeof(char), k, port->file);
|
|
if (i == 0) {
|
|
return pic_eof_object();
|
|
}
|
|
else {
|
|
pic_realloc(pic, blob->data, i);
|
|
blob->len = i;
|
|
return pic_obj_value(blob);
|
|
}
|
|
}
|
|
|
|
static pic_value
|
|
pic_port_read_blob_ip(pic_state *pic)
|
|
{
|
|
struct pic_port *port;
|
|
struct pic_blob *bv;
|
|
int n;
|
|
char *buf;
|
|
size_t start, end, i, len;
|
|
|
|
n = pic_get_args(pic, "b|pkk", &bv, &port, &start, &end);
|
|
switch (n) {
|
|
case 1:
|
|
port = pic_stdin(pic);
|
|
case 2:
|
|
start = 0;
|
|
case 3:
|
|
end = bv->len;
|
|
}
|
|
|
|
assert_port_profile(port, PIC_PORT_IN | PIC_PORT_BINARY, "read-bytevector!");
|
|
|
|
if (end < start) {
|
|
pic_errorf(pic, "read-bytevector!: end index must be greater than or equal to start index");
|
|
}
|
|
|
|
len = end - start;
|
|
|
|
buf = pic_calloc(pic, len, sizeof(char));
|
|
i = xfread(buf, sizeof(char), len, port->file);
|
|
memcpy(bv->data + start, buf, i);
|
|
pic_free(pic, buf);
|
|
|
|
if (i == 0) {
|
|
return pic_eof_object();
|
|
}
|
|
else {
|
|
return pic_size_value(i);
|
|
}
|
|
}
|
|
|
|
static pic_value
|
|
pic_port_newline(pic_state *pic)
|
|
{
|
|
struct pic_port *port = pic_stdout(pic);
|
|
|
|
pic_get_args(pic, "|p", &port);
|
|
|
|
assert_port_profile(port, PIC_PORT_OUT | PIC_PORT_TEXT, "newline");
|
|
|
|
xfputs("\n", port->file);
|
|
return pic_undef_value();
|
|
}
|
|
|
|
static pic_value
|
|
pic_port_write_char(pic_state *pic)
|
|
{
|
|
char c;
|
|
struct pic_port *port = pic_stdout(pic);
|
|
|
|
pic_get_args(pic, "c|p", &c, &port);
|
|
|
|
assert_port_profile(port, PIC_PORT_OUT | PIC_PORT_TEXT, "write-char");
|
|
|
|
xfputc(c, port->file);
|
|
return pic_undef_value();
|
|
}
|
|
|
|
static pic_value
|
|
pic_port_write_string(pic_state *pic)
|
|
{
|
|
char *str;
|
|
struct pic_port *port;
|
|
int start, end, n, i;
|
|
|
|
n = pic_get_args(pic, "z|pii", &str, &port, &start, &end);
|
|
switch (n) {
|
|
case 1:
|
|
port = pic_stdout(pic);
|
|
case 2:
|
|
start = 0;
|
|
case 3:
|
|
end = INT_MAX;
|
|
}
|
|
|
|
assert_port_profile(port, PIC_PORT_OUT | PIC_PORT_TEXT, "write-string");
|
|
|
|
for (i = start; i < end && str[i] != '\0'; ++i) {
|
|
xfputc(str[i], port->file);
|
|
}
|
|
return pic_undef_value();
|
|
}
|
|
|
|
static pic_value
|
|
pic_port_write_byte(pic_state *pic)
|
|
{
|
|
int i;
|
|
struct pic_port *port = pic_stdout(pic);
|
|
|
|
pic_get_args(pic, "i|p", &i, &port);
|
|
|
|
assert_port_profile(port, PIC_PORT_OUT | PIC_PORT_BINARY, "write-u8");
|
|
|
|
xfputc(i, port->file);
|
|
return pic_undef_value();
|
|
}
|
|
|
|
static pic_value
|
|
pic_port_write_blob(pic_state *pic)
|
|
{
|
|
struct pic_blob *blob;
|
|
struct pic_port *port;
|
|
int n;
|
|
size_t start, end, i;
|
|
|
|
n = pic_get_args(pic, "b|pkk", &blob, &port, &start, &end);
|
|
switch (n) {
|
|
case 1:
|
|
port = pic_stdout(pic);
|
|
case 2:
|
|
start = 0;
|
|
case 3:
|
|
end = blob->len;
|
|
}
|
|
|
|
assert_port_profile(port, PIC_PORT_OUT | PIC_PORT_BINARY, "write-bytevector");
|
|
|
|
for (i = start; i < end; ++i) {
|
|
xfputc(blob->data[i], port->file);
|
|
}
|
|
return pic_undef_value();
|
|
}
|
|
|
|
static pic_value
|
|
pic_port_flush(pic_state *pic)
|
|
{
|
|
struct pic_port *port = pic_stdout(pic);
|
|
|
|
pic_get_args(pic, "|p", &port);
|
|
|
|
assert_port_profile(port, PIC_PORT_OUT, "flush-output-port");
|
|
|
|
xfflush(port->file);
|
|
return pic_undef_value();
|
|
}
|
|
|
|
void
|
|
pic_init_port(pic_state *pic)
|
|
{
|
|
pic_define_standard_port(pic, "current-input-port", xstdin, PIC_PORT_IN);
|
|
pic_define_standard_port(pic, "current-output-port", xstdout, PIC_PORT_OUT);
|
|
pic_define_standard_port(pic, "current-error-port", xstderr, PIC_PORT_OUT);
|
|
|
|
pic_defun(pic, "call-with-port", pic_port_call_with_port);
|
|
|
|
pic_defun(pic, "input-port?", pic_port_input_port_p);
|
|
pic_defun(pic, "output-port?", pic_port_output_port_p);
|
|
pic_defun(pic, "textual-port?", pic_port_textual_port_p);
|
|
pic_defun(pic, "binary-port?", pic_port_binary_port_p);
|
|
pic_defun(pic, "port?", pic_port_port_p);
|
|
|
|
pic_defun(pic, "port-open?", pic_port_port_open_p);
|
|
pic_defun(pic, "close-port", pic_port_close_port);
|
|
|
|
/* string I/O */
|
|
pic_defun(pic, "open-input-string", pic_port_open_input_string);
|
|
pic_defun(pic, "open-output-string", pic_port_open_output_string);
|
|
pic_defun(pic, "get-output-string", pic_port_get_output_string);
|
|
pic_defun(pic, "open-input-bytevector", pic_port_open_input_blob);
|
|
pic_defun(pic, "open-output-bytevector", pic_port_open_output_bytevector);
|
|
pic_defun(pic, "get-output-bytevector", pic_port_get_output_bytevector);
|
|
|
|
/* input */
|
|
pic_defun(pic, "read-char", pic_port_read_char);
|
|
pic_defun(pic, "peek-char", pic_port_peek_char);
|
|
pic_defun(pic, "read-line", pic_port_read_line);
|
|
pic_defun(pic, "eof-object?", pic_port_eof_object_p);
|
|
pic_defun(pic, "eof-object", pic_port_eof_object);
|
|
pic_defun(pic, "char-ready?", pic_port_char_ready_p);
|
|
pic_defun(pic, "read-string", pic_port_read_string);
|
|
pic_defun(pic, "read-u8", pic_port_read_byte);
|
|
pic_defun(pic, "peek-u8", pic_port_peek_byte);
|
|
pic_defun(pic, "u8-ready?", pic_port_byte_ready_p);
|
|
pic_defun(pic, "read-bytevector", pic_port_read_blob);
|
|
pic_defun(pic, "read-bytevector!", pic_port_read_blob_ip);
|
|
|
|
/* output */
|
|
pic_defun(pic, "newline", pic_port_newline);
|
|
pic_defun(pic, "write-char", pic_port_write_char);
|
|
pic_defun(pic, "write-string", pic_port_write_string);
|
|
pic_defun(pic, "write-u8", pic_port_write_byte);
|
|
pic_defun(pic, "write-bytevector", pic_port_write_blob);
|
|
pic_defun(pic, "flush-output-port", pic_port_flush);
|
|
}
|