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py/modstruct: Support repetition counters for all types, not just string.

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This makes format specifiers ~ fully compatible with CPython.

Adds 24 bytes for stmhal port (because previosuly we had to catch and report
it's unsupported to user).
This commit is contained in:
Paul Sokolovsky 2015-10-31 18:42:35 +03:00
parent f705cb5f7a
commit 2b080cf599
1 changed files with 37 additions and 37 deletions
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74
py/modstruct.c
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@ -85,10 +85,15 @@ STATIC mp_uint_t get_fmt_num(const char **p) {
STATIC uint calcsize_items(const char *fmt) {
uint cnt = 0;
while (*fmt) {
// TODO supports size spec only for "s"
if (!unichar_isdigit(*fmt++)) {
cnt++;
int num = 1;
if (unichar_isdigit(*fmt)) {
num = get_fmt_num(&fmt);
if (*fmt == 's') {
num = 1;
}
}
cnt += num;
fmt++;
}
return cnt;
}
@ -103,24 +108,25 @@ STATIC mp_obj_t struct_calcsize(mp_obj_t fmt_in) {
if (unichar_isdigit(*fmt)) {
cnt = get_fmt_num(&fmt);
}
if (cnt > 1) {
// TODO: count spec support only for string len
if (*fmt != 's') {
mp_not_implemented("count>1");
}
}
mp_uint_t sz;
mp_uint_t sz = 0;
if (*fmt == 's') {
sz = cnt;
} else {
sz = (mp_uint_t)mp_binary_get_size(fmt_type, *fmt, &align);
cnt = 1;
}
while (cnt--) {
// If we already have size for 's' case, don't set it again
if (sz == 0) {
sz = (mp_uint_t)mp_binary_get_size(fmt_type, *fmt, &align);
}
// TODO
assert(sz != (mp_uint_t)-1);
// Apply alignment
size = (size + align - 1) & ~(align - 1);
size += sz;
sz = 0;
}
// TODO
assert(sz != (mp_uint_t)-1);
// Apply alignment
size = (size + align - 1) & ~(align - 1);
size += sz;
}
return MP_OBJ_NEW_SMALL_INT(size);
}
@ -136,26 +142,24 @@ STATIC mp_obj_t struct_unpack(mp_obj_t fmt_in, mp_obj_t data_in) {
mp_get_buffer_raise(data_in, &bufinfo, MP_BUFFER_READ);
byte *p = bufinfo.buf;
for (uint i = 0; i < size; i++) {
for (uint i = 0; i < size;) {
mp_uint_t sz = 1;
if (unichar_isdigit(*fmt)) {
sz = get_fmt_num(&fmt);
}
if (sz > 1) {
// TODO: size spec support only for string len
if (*fmt != 's') {
mp_not_implemented("count>1");
}
}
mp_obj_t item;
if (*fmt == 's') {
item = mp_obj_new_bytes(p, sz);
p += sz;
fmt++;
res->items[i++] = item;
} else {
item = mp_binary_get_val(fmt_type, *fmt++, &p);
while (sz--) {
item = mp_binary_get_val(fmt_type, *fmt, &p);
res->items[i++] = item;
}
}
res->items[i] = item;
fmt++;
}
return res;
}
@ -171,21 +175,15 @@ STATIC mp_obj_t struct_pack(mp_uint_t n_args, const mp_obj_t *args) {
byte *p = (byte*)vstr.buf;
memset(p, 0, size);
for (mp_uint_t i = 1; i < n_args; i++) {
for (mp_uint_t i = 1; i < n_args;) {
mp_uint_t sz = 1;
if (unichar_isdigit(*fmt)) {
sz = get_fmt_num(&fmt);
}
if (sz > 1) {
// TODO: size spec support only for string len
if (*fmt != 's') {
mp_not_implemented("count>1");
}
}
if (*fmt == 's') {
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(args[i], &bufinfo, MP_BUFFER_READ);
mp_get_buffer_raise(args[i++], &bufinfo, MP_BUFFER_READ);
mp_uint_t to_copy = sz;
if (bufinfo.len < to_copy) {
to_copy = bufinfo.len;
@ -193,10 +191,12 @@ STATIC mp_obj_t struct_pack(mp_uint_t n_args, const mp_obj_t *args) {
memcpy(p, bufinfo.buf, to_copy);
memset(p + to_copy, 0, sz - to_copy);
p += sz;
fmt++;
} else {
mp_binary_set_val(fmt_type, *fmt++, args[i], &p);
while (sz--) {
mp_binary_set_val(fmt_type, *fmt, args[i++], &p);
}
}
fmt++;
}
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);