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#include <assert.h>
#include <stdarg.h>
#include <stddef.h>
#include <string.h>
#include "marshal.h"
#include "misc.h"
void BinarySink_put_data(BinarySink *bs, const void *data, size_t len)
{
bs->write(bs, data, len);
}
void BinarySink_put_datapl(BinarySink *bs, ptrlen pl)
{
BinarySink_put_data(bs, pl.ptr, pl.len);
}
void BinarySink_put_padding(BinarySink *bs, size_t len, unsigned char padbyte)
{
char buf[16];
memset(buf, padbyte, sizeof(buf));
while (len > 0) {
size_t thislen = len < sizeof(buf) ? len : sizeof(buf);
bs->write(bs, buf, thislen);
len -= thislen;
}
}
void BinarySink_put_byte(BinarySink *bs, unsigned char val)
{
bs->write(bs, &val, 1);
}
void BinarySink_put_bool(BinarySink *bs, bool val)
{
unsigned char cval = val ? 1 : 0;
bs->write(bs, &cval, 1);
}
void BinarySink_put_uint16(BinarySink *bs, unsigned long val)
{
unsigned char data[2];
PUT_16BIT_MSB_FIRST(data, val);
bs->write(bs, data, sizeof(data));
}
void BinarySink_put_uint32(BinarySink *bs, unsigned long val)
{
unsigned char data[4];
PUT_32BIT_MSB_FIRST(data, val);
bs->write(bs, data, sizeof(data));
}
void BinarySink_put_uint64(BinarySink *bs, uint64_t val)
{
unsigned char data[8];
PUT_64BIT_MSB_FIRST(data, val);
bs->write(bs, data, sizeof(data));
}
void BinarySink_put_string(BinarySink *bs, const void *data, size_t len)
{
/* Check that the string length fits in a uint32, without doing a
* potentially implementation-defined shift of more than 31 bits */
assert((len >> 31) < 2);
BinarySink_put_uint32(bs, len);
bs->write(bs, data, len);
}
void BinarySink_put_stringpl(BinarySink *bs, ptrlen pl)
{
BinarySink_put_string(bs, pl.ptr, pl.len);
}
void BinarySink_put_stringz(BinarySink *bs, const char *str)
{
BinarySink_put_string(bs, str, strlen(str));
}
void BinarySink_put_stringsb(BinarySink *bs, strbuf *buf)
{
BinarySink_put_string(bs, buf->s, buf->len);
strbuf_free(buf);
}
void BinarySink_put_asciz(BinarySink *bs, const char *str)
{
bs->write(bs, str, strlen(str) + 1);
}
bool BinarySink_put_pstring(BinarySink *bs, const char *str)
{
size_t len = strlen(str);
if (len > 255)
return false; /* can't write a Pascal-style string this long */
BinarySink_put_byte(bs, len);
bs->write(bs, str, len);
return true;
}
void BinarySink_put_fmtv(BinarySink *bs, const char *fmt, va_list ap)
{
if (bs->writefmtv) {
bs->writefmtv(bs, fmt, ap);
} else {
char *str = dupvprintf(fmt, ap);
bs->write(bs, str, strlen(str));
burnstr(str);
}
}
void BinarySink_put_fmt(BinarySink *bs, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
BinarySink_put_fmtv(bs, fmt, ap);
va_end(ap);
}
/* ---------------------------------------------------------------------- */
static bool BinarySource_data_avail(BinarySource *src, size_t wanted)
{
if (src->err)
return false;
if (wanted <= src->len - src->pos)
return true;
src->err = BSE_OUT_OF_DATA;
return false;
}
#define avail(wanted) BinarySource_data_avail(src, wanted)
#define advance(dist) (src->pos += dist)
#define here ((const void *)((const unsigned char *)src->data + src->pos))
#define consume(dist) \
((const void *)((const unsigned char *)src->data + \
((src->pos += dist) - dist)))
ptrlen BinarySource_get_data(BinarySource *src, size_t wanted)
{
if (!avail(wanted))
return make_ptrlen("", 0);
return make_ptrlen(consume(wanted), wanted);
}
unsigned char BinarySource_get_byte(BinarySource *src)
{
const unsigned char *ucp;
if (!avail(1))
return 0;
ucp = consume(1);
return *ucp;
}
bool BinarySource_get_bool(BinarySource *src)
{
const unsigned char *ucp;
if (!avail(1))
return false;
ucp = consume(1);
return *ucp != 0;
}
unsigned BinarySource_get_uint16(BinarySource *src)
{
const unsigned char *ucp;
if (!avail(2))
return 0;
ucp = consume(2);
return GET_16BIT_MSB_FIRST(ucp);
}
unsigned long BinarySource_get_uint32(BinarySource *src)
{
const unsigned char *ucp;
if (!avail(4))
return 0;
ucp = consume(4);
return GET_32BIT_MSB_FIRST(ucp);
}
uint64_t BinarySource_get_uint64(BinarySource *src)
{
const unsigned char *ucp;
if (!avail(8))
return 0;
ucp = consume(8);
return GET_64BIT_MSB_FIRST(ucp);
}
ptrlen BinarySource_get_string(BinarySource *src)
{
const unsigned char *ucp;
size_t len;
if (!avail(4))
return make_ptrlen("", 0);
ucp = consume(4);
len = GET_32BIT_MSB_FIRST(ucp);
if (!avail(len))
return make_ptrlen("", 0);
return make_ptrlen(consume(len), len);
}
const char *BinarySource_get_asciz(BinarySource *src)
{
const char *start, *end;
if (src->err)
return "";
start = here;
end = memchr(start, '\0', src->len - src->pos);
if (!end) {
src->err = BSE_OUT_OF_DATA;
return "";
}
advance(end + 1 - start);
return start;
}
static ptrlen BinarySource_get_chars_internal(
BinarySource *src, const char *set, bool include)
{
const char *start = here;
while (avail(1)) {
bool present = NULL != strchr(set, *(const char *)consume(0));
if (present != include)
break;
(void) consume(1);
}
const char *end = here;
return make_ptrlen(start, end - start);
}
ptrlen BinarySource_get_chars(BinarySource *src, const char *include_set)
{
return BinarySource_get_chars_internal(src, include_set, true);
}
ptrlen BinarySource_get_nonchars(BinarySource *src, const char *exclude_set)
{
return BinarySource_get_chars_internal(src, exclude_set, false);
}
ptrlen BinarySource_get_chomped_line(BinarySource *src)
{
const char *start, *end;
if (src->err)
return make_ptrlen(here, 0);
start = here;
end = memchr(start, '\n', src->len - src->pos);
if (end)
advance(end + 1 - start);
else
advance(src->len - src->pos);
end = here;
if (end > start && end[-1] == '\n')
end--;
if (end > start && end[-1] == '\r')
end--;
return make_ptrlen(start, end - start);
}
ptrlen BinarySource_get_pstring(BinarySource *src)
{
const unsigned char *ucp;
size_t len;
if (!avail(1))
return make_ptrlen("", 0);
ucp = consume(1);
len = *ucp;
if (!avail(len))
return make_ptrlen("", 0);
return make_ptrlen(consume(len), len);
}
void BinarySource_REWIND_TO__(BinarySource *src, size_t pos)
{
if (pos <= src->len) {
src->pos = pos;
src->err = BSE_NO_ERROR; /* clear any existing error */
} else {
src->pos = src->len;
src->err = BSE_OUT_OF_DATA; /* new error if we rewind out of range */
}
}
static void stdio_sink_write(BinarySink *bs, const void *data, size_t len)
{
stdio_sink *sink = BinarySink_DOWNCAST(bs, stdio_sink);
fwrite(data, 1, len, sink->fp);
}
void stdio_sink_init(stdio_sink *sink, FILE *fp)
{
sink->fp = fp;
BinarySink_INIT(sink, stdio_sink_write);
}
static void bufchain_sink_write(BinarySink *bs, const void *data, size_t len)
{
bufchain_sink *sink = BinarySink_DOWNCAST(bs, bufchain_sink);
bufchain_add(sink->ch, data, len);
}
void bufchain_sink_init(bufchain_sink *sink, bufchain *ch)
{
sink->ch = ch;
BinarySink_INIT(sink, bufchain_sink_write);
}
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