825 lines
18 KiB
C
825 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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#include "value.h"
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#include "object.h"
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#include "state.h"
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#ifndef EOF
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# define EOF (-1)
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#endif
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bool
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pic_port_p(pic_state *pic, pic_value obj, const pic_port_type *type)
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{
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if (value_type(pic, obj) != PIC_TYPE_PORT) {
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return false;
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}
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return type == NULL || pic_port_ptr(pic, obj)->file.vtable == type;
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}
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pic_value
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pic_funopen(pic_state *pic, void *cookie, const pic_port_type *type)
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{
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struct port *port;
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port = (struct port *)pic_obj_alloc(pic, sizeof(struct port), PIC_TYPE_PORT);
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port->file.cnt = 0;
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port->file.base = NULL;
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port->file.flag = type->read ? FILE_READ : FILE_WRITE;
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port->file.cookie = cookie;
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port->file.vtable = type;
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return obj_value(port);
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}
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int
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pic_fclose(pic_state *pic, pic_value port)
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{
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struct file *fp = &pic_port_ptr(pic, port)->file;
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if (fp->flag == 0)
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return 0;
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pic_fflush(pic, port);
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fp->flag = 0;
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if (fp->base != fp->buf)
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pic_free(pic, fp->base);
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return fp->vtable->close(pic, fp->cookie);
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}
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void
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pic_clearerr(pic_state *PIC_UNUSED(pic), pic_value port)
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{
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struct file *fp = &pic_port_ptr(pic, port)->file;
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fp->flag &= ~(FILE_EOF | FILE_ERR);
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}
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int
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pic_feof(pic_state *PIC_UNUSED(pic), pic_value port)
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{
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struct file *fp = &pic_port_ptr(pic, port)->file;
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return (fp->flag & FILE_EOF) != 0;
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}
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int
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pic_ferror(pic_state *PIC_UNUSED(pic), pic_value port)
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{
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struct file *fp = &pic_port_ptr(pic, port)->file;
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return (fp->flag & FILE_ERR) != 0;
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}
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static int
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fillbuf(pic_state *pic, struct file *fp)
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{
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int bufsize;
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if ((fp->flag & (FILE_READ|FILE_EOF|FILE_ERR)) != FILE_READ)
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return EOF;
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if (fp->base == NULL) {
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if ((fp->flag & FILE_UNBUF) == 0) {
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/* no buffer yet */
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if ((fp->base = pic_malloc(pic, PIC_BUFSIZ)) == NULL) {
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/* can't get buffer, try unbuffered */
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fp->flag |= FILE_UNBUF;
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}
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}
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if (fp->flag & FILE_UNBUF) {
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fp->base = fp->buf;
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}
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}
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bufsize = (fp->flag & FILE_UNBUF) ? sizeof(fp->buf) : PIC_BUFSIZ;
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fp->ptr = fp->base;
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fp->cnt = fp->vtable->read(pic, fp->cookie, fp->ptr, bufsize);
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if (--fp->cnt < 0) {
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if (fp->cnt == -1)
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fp->flag |= FILE_EOF;
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else
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fp->flag |= FILE_ERR;
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fp->cnt = 0;
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return EOF;
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}
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return (unsigned char) *fp->ptr++;
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}
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static int
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flushbuf(pic_state *pic, int x, struct file *fp)
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{
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int num_written=0, bufsize=0;
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char c = x;
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if ((fp->flag & (FILE_WRITE|FILE_EOF|FILE_ERR)) != FILE_WRITE)
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return EOF;
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if (fp->base == NULL && ((fp->flag & FILE_UNBUF) == 0)) {
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/* no buffer yet */
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if ((fp->base = pic_malloc(pic, PIC_BUFSIZ)) == NULL) {
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/* couldn't allocate a buffer, so try unbuffered */
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fp->flag |= FILE_UNBUF;
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} else {
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fp->ptr = fp->base;
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fp->cnt = PIC_BUFSIZ - 1;
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}
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}
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if (fp->flag & FILE_UNBUF) {
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/* unbuffered write */
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fp->ptr = fp->base = NULL;
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fp->cnt = 0;
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if (x == EOF)
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return EOF;
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num_written = fp->vtable->write(pic, fp->cookie, (const char *) &c, 1);
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bufsize = 1;
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} else {
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/* buffered write */
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assert(fp->ptr);
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if (x != EOF) {
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*fp->ptr++ = (unsigned char) c;
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}
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bufsize = (int)(fp->ptr - fp->base);
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while(bufsize - num_written > 0) {
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int t;
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t = fp->vtable->write(pic, fp->cookie, fp->base + num_written, bufsize - num_written);
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if (t < 0)
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break;
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num_written += t;
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}
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fp->ptr = fp->base;
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fp->cnt = PIC_BUFSIZ - 1;
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}
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if (num_written == bufsize) {
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return x;
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} else {
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fp->flag |= FILE_ERR;
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return EOF;
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}
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}
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int
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pic_fflush(pic_state *pic, pic_value port)
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{
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struct file *fp = &pic_port_ptr(pic, port)->file;
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int retval;
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retval = 0;
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if ((fp->flag & FILE_WRITE) == 0)
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return -1;
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flushbuf(pic, EOF, fp);
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if (fp->flag & FILE_ERR)
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retval = -1;
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return retval;
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}
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#define getc_(pic, p) \
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((--(p)->cnt >= 0) \
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? (unsigned char) *(p)->ptr++ \
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: fillbuf((pic), p))
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#define putc_(pic, x, p) \
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((--(p)->cnt >= 0 && !(((p)->flag & FILE_LNBUF) && (x) == '\n')) \
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? *(p)->ptr++ = (x) \
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: flushbuf((pic), (x), (p)))
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int
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pic_fputc(pic_state *pic, int x, pic_value port)
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{
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struct file *fp = &pic_port_ptr(pic, port)->file;
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return putc_(pic, x, fp);
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}
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int
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pic_fgetc(pic_state *pic, pic_value port)
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{
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struct file *fp = &pic_port_ptr(pic, port)->file;
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return getc_(pic, fp);
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}
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int
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pic_fputs(pic_state *pic, const char *s, pic_value port)
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{
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struct file *fp = &pic_port_ptr(pic, port)->file;
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const char *ptr = s;
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while(*ptr != '\0') {
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if (putc_(pic, *ptr, fp) == EOF)
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return EOF;
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++ptr;
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}
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return (int)(ptr - s);
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}
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char *
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pic_fgets(pic_state *pic, char *s, int size, pic_value port)
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{
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struct file *fp = &pic_port_ptr(pic, port)->file;
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int c = 0;
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char *buf;
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pic_fflush(pic, port);
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if (size == 0) {
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return NULL;
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}
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buf = s;
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while (--size > 0 && (c = getc_(pic, fp)) != EOF) {
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if ((*buf++ = c) == '\n')
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break;
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}
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*buf = '\0';
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return (c == EOF && buf == s) ? NULL : s;
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}
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int
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pic_ungetc(pic_state *PIC_UNUSED(pic), int c, pic_value port)
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{
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struct file *fp = &pic_port_ptr(pic, port)->file;
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unsigned char uc = c;
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if (c == EOF || fp->base == fp->ptr) {
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return EOF;
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}
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fp->cnt++;
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return *--fp->ptr = uc;
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}
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size_t
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pic_fread(pic_state *pic, void *ptr, size_t size, size_t count, pic_value port)
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{
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struct file *fp = &pic_port_ptr(pic, port)->file;
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char *bptr = ptr;
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long nbytes;
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int c;
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nbytes = size * count;
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while (nbytes > fp->cnt) {
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memcpy(bptr, fp->ptr, fp->cnt);
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fp->ptr += fp->cnt;
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bptr += fp->cnt;
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nbytes -= fp->cnt;
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if ((c = fillbuf(pic, fp)) == EOF) {
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return (size * count - nbytes) / size;
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} else {
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pic_ungetc(pic, c, port);
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}
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}
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memcpy(bptr, fp->ptr, nbytes);
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fp->ptr += nbytes;
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fp->cnt -= nbytes;
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return count;
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}
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size_t
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pic_fwrite(pic_state *pic, const void *ptr, size_t size, size_t count, pic_value port)
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{
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struct file *fp = &pic_port_ptr(pic, port)->file;
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const char *bptr = ptr;
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long nbytes;
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nbytes = size * count;
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while (nbytes > fp->cnt) {
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memcpy(fp->ptr, bptr, fp->cnt);
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fp->ptr += fp->cnt;
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bptr += fp->cnt;
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nbytes -= fp->cnt;
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if (flushbuf(pic, EOF, fp) == EOF) {
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return (size * count - nbytes) / size;
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}
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}
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memcpy(fp->ptr, bptr, nbytes);
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fp->ptr += nbytes;
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fp->cnt -= nbytes;
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return count;
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}
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long
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pic_fseek(pic_state *pic, pic_value port, long offset, int whence)
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{
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struct file *fp = &pic_port_ptr(pic, port)->file;
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long s;
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pic_fflush(pic, port);
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fp->ptr = fp->base;
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fp->cnt = 0;
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if ((s = fp->vtable->seek(pic, fp->cookie, offset, whence)) != 0)
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return s;
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fp->flag &= ~FILE_EOF;
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return 0;
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}
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#if PIC_USE_STDIO
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static int
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file_read(pic_state *PIC_UNUSED(pic), void *cookie, char *ptr, int size) {
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FILE *file = cookie;
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int r;
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size = 1; /* override size */
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r = (int)fread(ptr, 1, (size_t)size, file);
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if (r < size && ferror(file)) {
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return -1;
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}
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if (r == 0 && feof(file)) {
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clearerr(file);
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}
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return r;
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}
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static int
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file_write(pic_state *PIC_UNUSED(pic), void *cookie, const char *ptr, int size) {
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FILE *file = cookie;
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int r;
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r = (int)fwrite(ptr, 1, (size_t)size, file);
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if (r < size) {
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return -1;
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}
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fflush(cookie);
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return r;
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}
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static long
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file_seek(pic_state *PIC_UNUSED(pic), void *cookie, long pos, int whence) {
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switch (whence) {
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case PIC_SEEK_CUR:
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whence = SEEK_CUR;
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break;
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case PIC_SEEK_SET:
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whence = SEEK_SET;
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break;
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case PIC_SEEK_END:
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whence = SEEK_END;
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break;
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}
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if (fseek(cookie, pos, whence) == 0) {
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return ftell(cookie);
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}
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return -1;
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}
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static int
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file_close(pic_state *PIC_UNUSED(pic), void *cookie) {
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return fclose(cookie);
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}
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static const pic_port_type file_rd = {
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file_read, 0, file_seek, file_close
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};
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static const pic_port_type file_wr = {
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0, file_write, file_seek, file_close
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};
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pic_value
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pic_fopen(pic_state *pic, FILE *fp, const char *mode) {
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if (*mode == 'r') {
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return pic_funopen(pic, fp, &file_rd);
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} else {
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return pic_funopen(pic, fp, &file_wr);
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}
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}
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#else
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static int
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null_read(pic_state *PIC_UNUSED(pic), void *PIC_UNUSED(cookie), char *PIC_UNUSED(ptr), int PIC_UNUSED(size)) {
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return 0;
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}
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static int
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null_write(pic_state *PIC_UNUSED(pic), void *PIC_UNUSED(cookie), const char *PIC_UNUSED(ptr), int size) {
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return size;
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}
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static long
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null_seek(pic_state *PIC_UNUSED(pic), void *PIC_UNUSED(cookie), long PIC_UNUSED(pos), int PIC_UNUSED(whence)) {
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return 0;
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}
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static int
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null_close(pic_state *PIC_UNUSED(pic), void *PIC_UNUSED(cookie)) {
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return 0;
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}
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static const pic_port_type null_rd = {
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null_read, 0, null_seek, null_close
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};
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static const pic_port_type null_wr = {
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0, null_write, null_seek, null_close
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};
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static pic_value
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pic_fopen_null(pic_state *PIC_UNUSED(pic), const char *mode)
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{
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switch (*mode) {
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case 'r':
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return pic_funopen(pic, 0, &null_rd);
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default:
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return pic_funopen(pic, 0, &null_wr);
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}
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}
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#endif
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typedef struct { char *buf; long pos, end, capa; } xbuf_t;
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static int
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string_read(pic_state *PIC_UNUSED(pic), void *cookie, char *ptr, int size)
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{
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xbuf_t *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(pic_state *pic, void *cookie, const char *ptr, int size)
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{
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xbuf_t *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(pic, m->buf, 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(pic_state *PIC_UNUSED(pic), void *cookie, long pos, int whence)
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{
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xbuf_t *m = cookie;
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switch (whence) {
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case PIC_SEEK_SET:
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m->pos = pos;
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break;
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case PIC_SEEK_CUR:
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m->pos += pos;
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break;
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case PIC_SEEK_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(pic_state *pic, void *cookie)
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{
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xbuf_t *m = cookie;
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pic_free(pic, m->buf);
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pic_free(pic, m);
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return 0;
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}
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static const pic_port_type string_rd = {
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string_read, 0, string_seek, string_close
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};
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static const pic_port_type string_wr = {
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0, string_write, string_seek, string_close
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};
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pic_value
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pic_fmemopen(pic_state *pic, const char *data, int size, const char *mode)
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{
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xbuf_t *m;
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m = pic_malloc(pic, sizeof(xbuf_t));
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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 (*mode == 'r') {
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memcpy(m->buf, data, size);
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return pic_funopen(pic, m, &string_rd);
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} else {
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return pic_funopen(pic, m, &string_wr);
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}
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}
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int
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pic_fgetbuf(pic_state *pic, pic_value port, const char **buf, int *len)
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{
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struct file *fp = &pic_port_ptr(pic, port)->file;
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xbuf_t *s;
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pic_fflush(pic, port);
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if (fp->vtable->write != string_write) {
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return -1;
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}
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s = fp->cookie;
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*len = s->end;
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*buf = s->buf;
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return 0;
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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(pic, v, NULL) && (pic_port_ptr(pic, v)->file.flag & FILE_READ) != 0) {
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return pic_true_value(pic);
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} else {
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return pic_false_value(pic);
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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(pic, v, NULL) && (pic_port_ptr(pic, v)->file.flag & FILE_WRITE) != 0) {
|
|
return pic_true_value(pic);
|
|
}
|
|
else {
|
|
return pic_false_value(pic);
|
|
}
|
|
}
|
|
|
|
static pic_value
|
|
pic_port_port_p(pic_state *pic)
|
|
{
|
|
pic_value v;
|
|
|
|
pic_get_args(pic, "o", &v);
|
|
|
|
return pic_bool_value(pic, pic_port_p(pic, v, NULL));
|
|
}
|
|
|
|
static pic_value
|
|
pic_port_eof_object_p(pic_state *pic)
|
|
{
|
|
pic_value v;
|
|
|
|
pic_get_args(pic, "o", &v);
|
|
|
|
return pic_bool_value(pic, pic_eof_p(pic, v));
|
|
}
|
|
|
|
static pic_value
|
|
pic_port_eof_object(pic_state *pic)
|
|
{
|
|
pic_get_args(pic, "");
|
|
|
|
return pic_eof_object(pic);
|
|
}
|
|
|
|
static pic_value
|
|
pic_port_port_open_p(pic_state *pic)
|
|
{
|
|
pic_value port;
|
|
|
|
pic_get_args(pic, "p", &port);
|
|
|
|
return pic_bool_value(pic, pic_port_ptr(pic, port)->file.flag != 0);
|
|
}
|
|
|
|
static pic_value
|
|
pic_port_close_port(pic_state *pic)
|
|
{
|
|
pic_value port;
|
|
|
|
pic_get_args(pic, "p", &port);
|
|
|
|
pic_fclose(pic, port);
|
|
|
|
return pic_undef_value(pic);
|
|
}
|
|
|
|
#define assert_port_profile(port, flags, caller) do { \
|
|
int flag = pic_port_ptr(pic, port)->file.flag; \
|
|
if ((flag & (flags)) != (flags)) { \
|
|
switch (flags) { \
|
|
case FILE_WRITE: \
|
|
pic_error(pic, caller ": output port required", 0); \
|
|
case FILE_READ: \
|
|
pic_error(pic, caller ": input port required", 0); \
|
|
} \
|
|
} \
|
|
if (flag == 0) { \
|
|
pic_error(pic, caller ": open port required", 0); \
|
|
} \
|
|
} while (0)
|
|
|
|
static pic_value
|
|
pic_port_open_input_bytevector(pic_state *pic)
|
|
{
|
|
unsigned char *buf;
|
|
int len;
|
|
|
|
pic_get_args(pic, "b", &buf, &len);
|
|
|
|
return pic_fmemopen(pic, (char *)buf, len, "r");
|
|
}
|
|
|
|
static pic_value
|
|
pic_port_open_output_bytevector(pic_state *pic)
|
|
{
|
|
pic_get_args(pic, "");
|
|
|
|
return pic_fmemopen(pic, NULL, 0, "w");
|
|
}
|
|
|
|
static pic_value
|
|
pic_port_get_output_bytevector(pic_state *pic)
|
|
{
|
|
pic_value port = pic_stdout(pic);
|
|
const char *buf;
|
|
int len;
|
|
|
|
pic_get_args(pic, "|p", &port);
|
|
|
|
assert_port_profile(port, FILE_WRITE, "get-output-bytevector");
|
|
|
|
if (pic_fgetbuf(pic, port, &buf, &len) < 0) {
|
|
pic_error(pic, "port was not created by open-output-bytevector", 0);
|
|
}
|
|
return pic_blob_value(pic, (unsigned char *)buf, len);
|
|
}
|
|
|
|
static pic_value
|
|
pic_port_read_u8(pic_state *pic)
|
|
{
|
|
pic_value port = pic_stdin(pic);
|
|
int c;
|
|
|
|
pic_get_args(pic, "|p", &port);
|
|
|
|
assert_port_profile(port, FILE_READ, "read-u8");
|
|
if ((c = pic_fgetc(pic, port)) == EOF) {
|
|
return pic_eof_object(pic);
|
|
}
|
|
|
|
return pic_int_value(pic, c);
|
|
}
|
|
|
|
static pic_value
|
|
pic_port_peek_u8(pic_state *pic)
|
|
{
|
|
int c;
|
|
pic_value port = pic_stdin(pic);
|
|
|
|
pic_get_args(pic, "|p", &port);
|
|
|
|
assert_port_profile(port, FILE_READ, "peek-u8");
|
|
|
|
c = pic_fgetc(pic, port);
|
|
if (c == EOF) {
|
|
return pic_eof_object(pic);
|
|
}
|
|
else {
|
|
pic_ungetc(pic, c, port);
|
|
return pic_int_value(pic, c);
|
|
}
|
|
}
|
|
|
|
static pic_value
|
|
pic_port_read_bytevector_ip(pic_state *pic)
|
|
{
|
|
pic_value port;
|
|
unsigned char *buf;
|
|
int n, start, end, i, len;
|
|
|
|
n = pic_get_args(pic, "b|pii", &buf, &len, &port, &start, &end);
|
|
|
|
switch (n) {
|
|
case 1:
|
|
port = pic_stdin(pic);
|
|
case 2:
|
|
start = 0;
|
|
case 3:
|
|
end = len;
|
|
}
|
|
|
|
VALID_RANGE(pic, len, start, end);
|
|
assert_port_profile(port, FILE_READ, "read-bytevector!");
|
|
|
|
i = pic_fread(pic, buf + start, 1, end - start, port);
|
|
if (i == 0) {
|
|
return pic_eof_object(pic);
|
|
}
|
|
return pic_int_value(pic, i);
|
|
}
|
|
|
|
static pic_value
|
|
pic_port_write_u8(pic_state *pic)
|
|
{
|
|
int i;
|
|
pic_value port = pic_stdout(pic);
|
|
|
|
pic_get_args(pic, "i|p", &i, &port);
|
|
|
|
assert_port_profile(port, FILE_WRITE, "write-u8");
|
|
|
|
pic_fputc(pic, i, port);
|
|
return pic_undef_value(pic);
|
|
}
|
|
|
|
static pic_value
|
|
pic_port_write_bytevector(pic_state *pic)
|
|
{
|
|
pic_value port;
|
|
unsigned char *buf;
|
|
int n, start, end, len, done;
|
|
|
|
n = pic_get_args(pic, "b|pii", &buf, &len, &port, &start, &end);
|
|
|
|
switch (n) {
|
|
case 1:
|
|
port = pic_stdout(pic);
|
|
case 2:
|
|
start = 0;
|
|
case 3:
|
|
end = len;
|
|
}
|
|
|
|
VALID_RANGE(pic, len, start, end);
|
|
assert_port_profile(port, FILE_WRITE, "write-bytevector");
|
|
|
|
done = 0;
|
|
while (done < end - start) {
|
|
done += pic_fwrite(pic, buf + start + done, 1, end - start - done, port);
|
|
/* FIXME: error check... */
|
|
}
|
|
return pic_undef_value(pic);
|
|
}
|
|
|
|
static pic_value
|
|
pic_port_flush(pic_state *pic)
|
|
{
|
|
pic_value port = pic_stdout(pic);
|
|
|
|
pic_get_args(pic, "|p", &port);
|
|
|
|
assert_port_profile(port, FILE_WRITE, "flush-output-port");
|
|
|
|
pic_fflush(pic, port);
|
|
return pic_undef_value(pic);
|
|
}
|
|
|
|
void
|
|
pic_init_port(pic_state *pic)
|
|
{
|
|
#if PIC_USE_STDIO
|
|
pic_defvar(pic, "current-input-port", pic_fopen(pic, stdin, "r"));
|
|
pic_defvar(pic, "current-output-port", pic_fopen(pic, stdout, "w"));
|
|
pic_defvar(pic, "current-error-port", pic_fopen(pic, stdout, "w"));
|
|
#else
|
|
pic_defvar(pic, "current-input-port", pic_fopen_null(pic, "r"));
|
|
pic_defvar(pic, "current-output-port", pic_fopen_null(pic, "w"));
|
|
pic_defvar(pic, "current-error-port", pic_fopen_null(pic, "w"));
|
|
#endif
|
|
|
|
pic_defun(pic, "port?", pic_port_port_p);
|
|
pic_defun(pic, "input-port?", pic_port_input_port_p);
|
|
pic_defun(pic, "output-port?", pic_port_output_port_p);
|
|
pic_defun(pic, "port-open?", pic_port_port_open_p);
|
|
pic_defun(pic, "close-port", pic_port_close_port);
|
|
|
|
pic_defun(pic, "eof-object?", pic_port_eof_object_p);
|
|
pic_defun(pic, "eof-object", pic_port_eof_object);
|
|
|
|
/* input */
|
|
pic_defun(pic, "read-u8", pic_port_read_u8);
|
|
pic_defun(pic, "peek-u8", pic_port_peek_u8);
|
|
pic_defun(pic, "read-bytevector!", pic_port_read_bytevector_ip);
|
|
|
|
/* output */
|
|
pic_defun(pic, "write-u8", pic_port_write_u8);
|
|
pic_defun(pic, "write-bytevector", pic_port_write_bytevector);
|
|
pic_defun(pic, "flush-output-port", pic_port_flush);
|
|
|
|
/* string I/O */
|
|
pic_defun(pic, "open-input-bytevector", pic_port_open_input_bytevector);
|
|
pic_defun(pic, "open-output-bytevector", pic_port_open_output_bytevector);
|
|
pic_defun(pic, "get-output-bytevector", pic_port_get_output_bytevector);
|
|
}
|