// internal inplace reader for when it straddles the end of the buffer
static const char* mpack_read_bytes_inplace_big(mpack_reader_t* reader, size_t count) {
// we should only arrive here from inplace straddle; this should already be checked
mpack_assert(mpack_reader_error(reader) == mpack_ok, "already in error state? %s",
mpack_error_to_string(mpack_reader_error(reader)));
mpack_assert(reader->left < count, "already enough bytes in buffer: %i left, %i count", (int)reader->left, (int)count);
// we'll need a fill function to get more data. if there's no
// fill function, the buffer should contain an entire MessagePack
// object, so we raise mpack_error_invalid instead of mpack_error_io
// on truncated data.
if (reader->fill == NULL) {
mpack_reader_flag_error(reader, mpack_error_invalid);
return NULL;
}
// make sure the buffer is big enough to actually fit the data
if (count > reader->size) {
mpack_reader_flag_error(reader, mpack_error_too_big);
return NULL;
}
// re-fill as much as possible
mpack_partial_fill(reader);
if (reader->left < count) {
mpack_reader_flag_error(reader, mpack_error_io);
return NULL;
}
reader->pos += count;
reader->left -= count;
return reader->buffer;
}
char* mpack_read_bytes_alloc_impl(mpack_reader_t* reader, size_t count, bool null_terminated) {
// track the bytes first in case it jumps
mpack_reader_track_bytes(reader, count);
if (mpack_reader_error(reader) != mpack_ok)
return NULL;
// cannot allocate zero bytes. this is not an error.
if (count == 0 && null_terminated == false)
return NULL;
// allocate data
char* data = (char*)MPACK_MALLOC(count + (null_terminated ? 1 : 0)); // TODO: can this overflow?
if (data == NULL) {
mpack_reader_flag_error(reader, mpack_error_memory);
return NULL;
}
// read with error callback disabled so we don't leak our buffer
mpack_read_native_noerrorfn(reader, data, count);
// report flagged errors
if (mpack_reader_error(reader) != mpack_ok) {
MPACK_FREE(data);
if (reader->error_fn)
reader->error_fn(reader, mpack_reader_error(reader));
return NULL;
}
if (null_terminated)
data[count] = '\0';
return data;
}
size_t mpack_expect_bin_buf(mpack_reader_t* reader, char* buf, size_t bufsize) {
size_t binsize = mpack_expect_bin(reader);
if (mpack_reader_error(reader))
return 0;
if (binsize > bufsize) {
mpack_reader_flag_error(reader, mpack_error_too_big);
return 0;
}
mpack_read_bytes(reader, buf, binsize);
if (mpack_reader_error(reader))
return 0;
mpack_done_bin(reader);
return binsize;
}
void* mpack_expect_array_alloc_impl(mpack_reader_t* reader, size_t element_size, uint32_t max_count, uint32_t* out_count, bool allow_nil) {
*out_count = 0;
uint32_t count;
bool has_array = true;
if (allow_nil)
has_array = mpack_expect_array_max_or_nil(reader, max_count, &count);
else
count = mpack_expect_array_max(reader, max_count);
if (mpack_reader_error(reader))
return NULL;
// size 0 is not an error; we return NULL for no elements.
if (count == 0) {
// we call mpack_done_array() automatically ONLY if we are using
// the _or_nil variant. this is the only way to allow nil and empty
// to work the same way.
if (allow_nil && has_array)
mpack_done_array(reader);
return NULL;
}
void* p = MPACK_MALLOC(element_size * count);
if (p == NULL) {
mpack_reader_flag_error(reader, mpack_error_memory);
return NULL;
}
*out_count = count;
return p;
}
// Converts MessagePack bin/ext bytes to JSON base64 string
static bool base64(mpack_reader_t* reader, yajl_gen gen, options_t* options, uint32_t len, char* output, char* p, bool prefix) {
if (prefix) {
memcpy(p, b64_str, strlen(b64_str));
p += strlen(b64_str);
}
base64_encodestate state;
base64_init_encodestate(&state);
while (len > 0) {
char buf[4096];
uint32_t count = (len < sizeof(buf)) ? len : sizeof(buf);
len -= count;
mpack_read_bytes(reader, buf, count);
if (mpack_reader_error(reader) != mpack_ok) {
fprintf(stderr, "%s: error reading base64 bytes\n", options->command);
return false;
}
p += base64_encode_block(buf, (int)count, p, &state);
}
p += base64_encode_blockend(p, &state);
bool ret = yajl_gen_string(gen, (const unsigned char*)output, p - output) == yajl_gen_status_ok;
return ret;
}
void mpack_read_utf8(mpack_reader_t* reader, char* p, size_t byte_count) {
mpack_assert(p != NULL, "destination for read of %i bytes is NULL", (int)byte_count);
mpack_reader_track_str_bytes_all(reader, byte_count);
mpack_read_native(reader, p, byte_count);
if (mpack_reader_error(reader) == mpack_ok && !mpack_utf8_check(p, byte_count))
mpack_reader_flag_error(reader, mpack_error_type);
}
size_t mpack_expect_str_buf(mpack_reader_t* reader, char* buf, size_t bufsize) {
size_t length = mpack_expect_str(reader);
if (mpack_reader_error(reader))
return 0;
if (length > bufsize) {
mpack_reader_flag_error(reader, mpack_error_too_big);
return 0;
}
mpack_read_bytes(reader, buf, length);
if (mpack_reader_error(reader))
return 0;
mpack_done_str(reader);
return length;
}
void mpack_read_utf8_cstr(mpack_reader_t* reader, char* buf, size_t buffer_size, size_t byte_count) {
mpack_read_cstr_unchecked(reader, buf, buffer_size, byte_count);
// check encoding
if (mpack_reader_error(reader) == mpack_ok && !mpack_utf8_check_no_null(buf, byte_count)) {
buf[0] = 0;
mpack_reader_flag_error(reader, mpack_error_type);
}
}
const char* mpack_read_utf8_inplace(mpack_reader_t* reader, size_t count) {
mpack_reader_track_str_bytes_all(reader, count);
const char* str = mpack_read_bytes_inplace_notrack(reader, count);
if (mpack_reader_error(reader) == mpack_ok && !mpack_utf8_check(str, count)) {
mpack_reader_flag_error(reader, mpack_error_type);
return NULL;
}
return str;
}
void mpack_discard(mpack_reader_t* reader) {
mpack_tag_t var = mpack_read_tag(reader);
if (mpack_reader_error(reader))
return;
switch (var.type) {
case mpack_type_str:
mpack_skip_bytes(reader, var.v.l);
mpack_done_str(reader);
break;
case mpack_type_bin:
mpack_skip_bytes(reader, var.v.l);
mpack_done_bin(reader);
break;
case mpack_type_ext:
mpack_skip_bytes(reader, var.v.l);
mpack_done_ext(reader);
break;
case mpack_type_array: {
for (; var.v.n > 0; --var.v.n) {
mpack_discard(reader);
if (mpack_reader_error(reader))
break;
}
mpack_done_array(reader);
break;
}
case mpack_type_map: {
for (; var.v.n > 0; --var.v.n) {
mpack_discard(reader);
mpack_discard(reader);
if (mpack_reader_error(reader))
break;
}
mpack_done_map(reader);
break;
}
default:
break;
}
}
// read inplace without tracking (since there are different
// tracking modes for different inplace readers)
static const char* mpack_read_bytes_inplace_notrack(mpack_reader_t* reader, size_t count) {
if (mpack_reader_error(reader) != mpack_ok)
return NULL;
// if we have enough bytes already in the buffer, we can return it directly.
if (reader->left >= count) {
reader->pos += count;
reader->left -= count;
return reader->buffer + reader->pos - count;
}
return mpack_read_bytes_inplace_big(reader, count);
}
size_t mpack_reader_remaining(mpack_reader_t* reader, const char** data) {
if (mpack_reader_error(reader) != mpack_ok)
return 0;
#if MPACK_READ_TRACKING
if (mpack_reader_flag_if_error(reader, mpack_track_check_empty(&reader->track)) != mpack_ok)
return 0;
#endif
if (data)
*data = reader->buffer + reader->pos;
return reader->left;
}
mpack_error_t mpack_reader_destroy(mpack_reader_t* reader) {
// clean up tracking, asserting if we're not already in an error state
#if MPACK_READ_TRACKING
mpack_reader_flag_if_error(reader, mpack_track_destroy(&reader->track, mpack_reader_error(reader) != mpack_ok));
#endif
if (reader->teardown)
reader->teardown(reader);
reader->teardown = NULL;
return reader->error;
}
mpack_tag_t mpack_peek_tag(mpack_reader_t* reader) {
mpack_log("peeking tag\n");
// make sure we can peek a tag
if (mpack_reader_error(reader) != mpack_ok)
return mpack_tag_nil();
if (mpack_reader_track_peek_element(reader) != mpack_ok)
return mpack_tag_nil();
mpack_tag_t tag;
mpack_memset(&tag, 0, sizeof(tag));
if (mpack_parse_tag(reader, &tag) == 0)
return mpack_tag_nil();
return tag;
}
static size_t mpack_expect_cstr_unchecked(mpack_reader_t* reader, char* buf, size_t bufsize) {
// make sure buffer makes sense
mpack_assert(bufsize >= 1, "buffer size is zero; you must have room for at least a null-terminator");
// expect a str
size_t length = mpack_expect_str_buf(reader, buf, bufsize - 1);
if (mpack_reader_error(reader)) {
buf[0] = 0;
return 0;
}
buf[length] = 0;
return length;
}
// Reads MessagePack string bytes and outputs a JSON string
static bool string(mpack_reader_t* reader, yajl_gen gen, options_t* options, uint32_t len) {
char* str = (char*)malloc(len);
mpack_read_bytes(reader, str, len);
if (mpack_reader_error(reader) != mpack_ok) {
fprintf(stderr, "%s: error reading string bytes\n", options->command);
free(str);
return false;
}
mpack_done_str(reader);
yajl_gen_status status = yajl_gen_string(gen, (const unsigned char*)str, len);
free(str);
return status == yajl_gen_status_ok;
}
mpack_tag_t mpack_read_tag(mpack_reader_t* reader) {
mpack_log("reading tag\n");
// make sure we can read a tag
if (mpack_reader_error(reader) != mpack_ok)
return mpack_tag_nil();
if (mpack_reader_track_element(reader) != mpack_ok)
return mpack_tag_nil();
mpack_tag_t tag;
mpack_memset(&tag, 0, sizeof(tag));
size_t count = mpack_parse_tag(reader, &tag);
if (count == 0)
return mpack_tag_nil();
#if MPACK_READ_TRACKING
mpack_error_t track_error = mpack_ok;
switch (tag.type) {
case mpack_type_map:
case mpack_type_array:
track_error = mpack_track_push(&reader->track, tag.type, tag.v.l);
break;
case mpack_type_str:
case mpack_type_bin:
case mpack_type_ext:
track_error = mpack_track_push(&reader->track, tag.type, tag.v.n);
break;
default:
break;
}
if (track_error != mpack_ok) {
mpack_reader_flag_error(reader, track_error);
return mpack_tag_nil();
}
#endif
// the tag is guaranteed to have been read out of
// the buffer, so we advance past it
reader->pos += count;
reader->left -= count;
return tag;
}
void mpack_skip_bytes(mpack_reader_t* reader, size_t count) {
if (mpack_reader_error(reader) != mpack_ok)
return;
mpack_log("skip requested for %i bytes\n", (int)count);
mpack_reader_track_bytes(reader, count);
// check if we have enough in the buffer already
if (reader->left >= count) {
mpack_log("skipping %i bytes still in buffer\n", (int)count);
reader->left -= count;
reader->pos += count;
return;
}
// we'll need at least a fill function to skip more data. if there's
// no fill function, the buffer should contain an entire MessagePack
// object, so we raise mpack_error_invalid instead of mpack_error_io
// on truncated data. (see mpack_read_native_big())
if (reader->fill == NULL) {
mpack_log("reader has no fill function!\n");
mpack_reader_flag_error(reader, mpack_error_invalid);
return;
}
// discard whatever's left in the buffer
mpack_log("discarding %i bytes still in buffer\n", (int)reader->left);
count -= reader->left;
reader->pos += reader->left;
reader->left = 0;
#if !MPACK_OPTIMIZE_FOR_SIZE
// use the skip function if we've got one, and if we're trying
// to skip a lot of data. if we only need to skip some tiny
// fraction of the buffer size, it's probably better to just
// fill the buffer and skip from it instead of trying to seek.
if (reader->skip && count > reader->size / 16) {
mpack_log("calling skip function for %i bytes\n", (int)count);
reader->skip(reader, count);
return;
}
#endif
mpack_reader_skip_using_fill(reader, count);
}
static void mpack_read_cstr_unchecked(mpack_reader_t* reader, char* buf, size_t buffer_size, size_t byte_count) {
mpack_assert(buf != NULL, "destination for read of %i bytes is NULL", (int)byte_count);
mpack_assert(buffer_size >= 1, "buffer size is zero; you must have room for at least a null-terminator");
if (mpack_reader_error(reader)) {
buf[0] = 0;
return;
}
if (byte_count > buffer_size - 1) {
mpack_reader_flag_error(reader, mpack_error_too_big);
buf[0] = 0;
return;
}
mpack_reader_track_str_bytes_all(reader, byte_count);
mpack_read_native(reader, buf, byte_count);
buf[byte_count] = 0;
}
void mpack_expect_str_match(mpack_reader_t* reader, const char* str, size_t len) {
// expect a str the correct length
if (len > UINT32_MAX)
mpack_reader_flag_error(reader, mpack_error_type);
mpack_expect_str_length(reader, (uint32_t)len);
if (mpack_reader_error(reader))
return;
// check each byte
for (size_t i = 0; i < len; ++i) {
mpack_reader_track_bytes(reader, 1);
if (mpack_read_native_u8(reader) != *str++) {
mpack_reader_flag_error(reader, mpack_error_type);
return;
}
}
mpack_done_str(reader);
}
void mpack_print_file(const char* data, size_t len, FILE* file) {
mpack_assert(data != NULL, "data is NULL");
mpack_assert(file != NULL, "file is NULL");
mpack_reader_t reader;
mpack_reader_init_data(&reader, data, len);
int depth = 2;
for (int i = 0; i < depth; ++i)
fprintf(file, " ");
mpack_print_element(&reader, depth, file);
putc('\n', file);
size_t remaining = mpack_reader_remaining(&reader, NULL);
if (mpack_reader_destroy(&reader) != mpack_ok)
fprintf(file, "<mpack parsing error %s>\n", mpack_error_to_string(mpack_reader_error(&reader)));
else if (remaining > 0)
fprintf(file, "<%i extra bytes at end of mpack>\n", (int)remaining);
}
static void mpack_file_reader_skip(mpack_reader_t* reader, size_t count) {
if (mpack_reader_error(reader) != mpack_ok)
return;
FILE* file = (FILE*)reader->context;
// We call ftell() to test whether the stream is seekable
// without causing a file error.
if (ftell(file) >= 0) {
mpack_log("seeking forward %i bytes\n", (int)count);
if (fseek(file, (long int)count, SEEK_CUR) == 0)
return;
mpack_log("fseek() didn't return zero!\n");
if (ferror(file)) {
mpack_reader_flag_error(reader, mpack_error_io);
return;
}
}
// If the stream is not seekable, fall back to the fill function.
mpack_reader_skip_using_fill(reader, count);
}
void test_read_error_handler(mpack_reader_t* reader, mpack_error_t error) {
TEST_TRUE(test_read_error == mpack_ok, "error handler was called multiple times");
TEST_TRUE(error != mpack_ok, "error handler was called with mpack_ok");
TEST_TRUE(mpack_reader_error(reader) == error, "reader error does not match given error");
test_read_error = error;
}
void mpack_done_type(mpack_reader_t* reader, mpack_type_t type) {
if (mpack_reader_error(reader) == mpack_ok)
mpack_reader_flag_if_error(reader, mpack_track_pop(&reader->track, type));
}
static bool element(mpack_reader_t* reader, yajl_gen gen, options_t* options, int depth) {
const mpack_tag_t tag = mpack_read_tag(reader);
if (mpack_reader_error(reader) != mpack_ok)
return false;
if (!options->debug && depth == 0 && (tag.type != mpack_type_map && tag.type != mpack_type_array)) {
fprintf(stderr, "%s: Top-level object must be a map or array. Try debug viewing mode (-d)\n", options->command);
return false;
}
// TODO check not depth zero
switch (tag.type) {
case mpack_type_bool: return yajl_gen_bool(gen, tag.v.b) == yajl_gen_status_ok;
case mpack_type_nil: return yajl_gen_null(gen) == yajl_gen_status_ok;
case mpack_type_int: return yajl_gen_integer(gen, tag.v.i) == yajl_gen_status_ok;
case mpack_type_float: return yajl_gen_double(gen, tag.v.f) == yajl_gen_status_ok;
case mpack_type_double: return yajl_gen_double(gen, tag.v.d) == yajl_gen_status_ok;
case mpack_type_uint:
if (tag.v.u > (uint64_t)INT64_MAX) {
char buf[32];
snprintf(buf, sizeof(buf), "%" PRIu64, tag.v.u);
return yajl_gen_string(gen, (const unsigned char*)buf, strlen(buf)) == yajl_gen_status_ok;
}
return yajl_gen_integer(gen, (int64_t)tag.v.u) == yajl_gen_status_ok;
case mpack_type_str:
return string(reader, gen, options, tag.v.l);
case mpack_type_bin:
if (options->base64) {
return base64_bin(reader, gen, options, tag.v.l, options->base64_prefix);
} else if (options->debug) {
mpack_skip_bytes(reader, tag.v.l);
mpack_done_bin(reader);
// output nothing to allow us to print our debug string
skip_quotes = true;
if (yajl_gen_string(gen, (const unsigned char*)"", 0) != yajl_gen_status_ok)
return false;
skip_quotes = false;
char buf[64];
snprintf(buf, sizeof(buf), "<bin of size %u>", tag.v.l);
print(out_file, buf, strlen(buf));
return true;
} else {
fprintf(stderr, "%s: bin unencodable in JSON. Try debug viewing mode (-d)\n", options->command);
return false;
}
case mpack_type_ext:
if (options->base64) {
return base64_ext(reader, gen, options, tag.exttype, tag.v.l);
} else if (options->debug) {
mpack_skip_bytes(reader, tag.v.l);
mpack_done_ext(reader);
// output nothing to allow us to print our debug string
skip_quotes = true;
if (yajl_gen_string(gen, (const unsigned char*)"", 0) != yajl_gen_status_ok)
return false;
skip_quotes = false;
char buf[64];
snprintf(buf, sizeof(buf), "<ext of type %i size %u>", tag.exttype, tag.v.l);
print(out_file, buf, strlen(buf));
return true;
} else {
fprintf(stderr, "%s: ext type %i unencodable in JSON. Try debug viewing mode (-d)\n", options->command, tag.exttype);
return false;
}
case mpack_type_array:
if (yajl_gen_array_open(gen) != yajl_gen_status_ok)
return false;
for (size_t i = 0; i < tag.v.l; ++i)
if (!element(reader, gen, options, depth + 1))
return false;
mpack_done_array(reader);
return yajl_gen_array_close(gen) == yajl_gen_status_ok;
case mpack_type_map:
if (yajl_gen_map_open(gen) != yajl_gen_status_ok)
return false;
for (size_t i = 0; i < tag.v.l; ++i) {
if (options->debug) {
element(reader, gen, options, depth + 1);
} else {
uint32_t len = mpack_expect_str(reader);
if (mpack_reader_error(reader) != mpack_ok) {
fprintf(stderr, "%s: map key is not a string. Try debug viewing mode (-d)\n", options->command);
return false;
}
if (!string(reader, gen, options, len))
return false;
}
if (!element(reader, gen, options, depth + 1))
return false;
}
mpack_done_map(reader);
return yajl_gen_map_close(gen) == yajl_gen_status_ok;
}
return true;
}
static void mpack_print_element(mpack_reader_t* reader, size_t depth, FILE* file) {
mpack_tag_t val = mpack_read_tag(reader);
if (mpack_reader_error(reader) != mpack_ok)
return;
switch (val.type) {
case mpack_type_nil:
fprintf(file, "null");
break;
case mpack_type_bool:
fprintf(file, val.v.b ? "true" : "false");
break;
case mpack_type_float:
fprintf(file, "%f", val.v.f);
break;
case mpack_type_double:
fprintf(file, "%f", val.v.d);
break;
case mpack_type_int:
fprintf(file, "%" PRIi64, val.v.i);
break;
case mpack_type_uint:
fprintf(file, "%" PRIu64, val.v.u);
break;
case mpack_type_bin:
fprintf(file, "<binary data of length %u>", val.v.l);
mpack_skip_bytes(reader, val.v.l);
mpack_done_bin(reader);
break;
case mpack_type_ext:
fprintf(file, "<ext data of type %i and length %u>", val.exttype, val.v.l);
mpack_skip_bytes(reader, val.v.l);
mpack_done_ext(reader);
break;
case mpack_type_str:
putc('"', file);
for (size_t i = 0; i < val.v.l; ++i) {
char c;
mpack_read_bytes(reader, &c, 1);
if (mpack_reader_error(reader) != mpack_ok)
return;
switch (c) {
case '\n': fprintf(file, "\\n"); break;
case '\\': fprintf(file, "\\\\"); break;
case '"': fprintf(file, "\\\""); break;
default: putc(c, file); break;
}
}
putc('"', file);
mpack_done_str(reader);
break;
case mpack_type_array:
fprintf(file, "[\n");
for (size_t i = 0; i < val.v.n; ++i) {
for (size_t j = 0; j < depth + 1; ++j)
fprintf(file, " ");
mpack_print_element(reader, depth + 1, file);
if (mpack_reader_error(reader) != mpack_ok)
return;
if (i != val.v.n - 1)
putc(',', file);
putc('\n', file);
}
for (size_t i = 0; i < depth; ++i)
fprintf(file, " ");
putc(']', file);
mpack_done_array(reader);
break;
case mpack_type_map:
fprintf(file, "{\n");
for (size_t i = 0; i < val.v.n; ++i) {
for (size_t j = 0; j < depth + 1; ++j)
fprintf(file, " ");
mpack_print_element(reader, depth + 1, file);
if (mpack_reader_error(reader) != mpack_ok)
return;
fprintf(file, ": ");
mpack_print_element(reader, depth + 1, file);
if (mpack_reader_error(reader) != mpack_ok)
return;
if (i != val.v.n - 1)
putc(',', file);
putc('\n', file);
}
for (size_t i = 0; i < depth; ++i)
fprintf(file, " ");
putc('}', file);
mpack_done_map(reader);
break;
}
}
// Reads count bytes into p. Used when there are not enough bytes
// left in the buffer to satisfy a read.
void mpack_read_native_big(mpack_reader_t* reader, char* p, size_t count) {
mpack_assert(count == 0 || p != NULL, "data pointer for %i bytes is NULL", (int)count);
if (mpack_reader_error(reader) != mpack_ok) {
mpack_memset(p, 0, count);
return;
}
mpack_log("big read for %i bytes into %p, %i left in buffer, buffer size %i\n",
(int)count, p, (int)reader->left, (int)reader->size);
if (count <= reader->left) {
mpack_assert(0,
"big read requested for %i bytes, but there are %i bytes "
"left in buffer. call mpack_read_native() instead",
(int)count, (int)reader->left);
mpack_reader_flag_error(reader, mpack_error_bug);
mpack_memset(p, 0, count);
return;
}
// we'll need a fill function to get more data. if there's no
// fill function, the buffer should contain an entire MessagePack
// object, so we raise mpack_error_invalid instead of mpack_error_io
// on truncated data.
if (reader->fill == NULL) {
mpack_reader_flag_error(reader, mpack_error_invalid);
mpack_memset(p, 0, count);
return;
}
if (reader->size == 0) {
// somewhat debatable what error should be returned here. when
// initializing a reader with an in-memory buffer it's not
// necessarily a bug if the data is blank; it might just have
// been truncated to zero. for this reason we return the same
// error as if the data was truncated.
mpack_reader_flag_error(reader, mpack_error_io);
mpack_memset(p, 0, count);
return;
}
// flush what's left of the buffer
if (reader->left > 0) {
mpack_log("flushing %i bytes remaining in buffer\n", (int)reader->left);
mpack_memcpy(p, reader->buffer + reader->pos, reader->left);
count -= reader->left;
p += reader->left;
reader->pos += reader->left;
reader->left = 0;
}
// we read only in multiples of the buffer size. read the middle portion, if any
size_t middle = count - (count % reader->size);
if (middle > 0) {
mpack_log("reading %i bytes in middle\n", (int)middle);
if (mpack_fill(reader, p, middle) < middle) {
mpack_reader_flag_error(reader, mpack_error_io);
mpack_memset(p, 0, count);
return;
}
count -= middle;
p += middle;
if (count == 0)
return;
}
// fill the buffer
reader->pos = 0;
reader->left = mpack_fill(reader, reader->buffer, reader->size);
mpack_log("filled %i bytes into buffer\n", (int)reader->left);
if (reader->left < count) {
mpack_reader_flag_error(reader, mpack_error_io);
mpack_memset(p, 0, count);
return;
}
// serve the remainder
mpack_log("serving %i remaining bytes from %p to %p\n", (int)count, reader->buffer+reader->pos,p);
mpack_memcpy(p, reader->buffer + reader->pos, count);
reader->pos += count;
reader->left -= count;
}