Commit Graph

362 Commits

Author SHA1 Message Date
Damien George 8d82b0edbd extmod: Add VfsPosix filesystem component.
This VFS component allows to mount a host POSIX filesystem within the uPy
VFS sub-system.  All traditional POSIX file access then goes through the
VFS, allowing to sandbox a uPy process to a certain sub-dir of the host
system, as well as mount other filesystem types alongside the host
filesystem.
2018-06-06 14:28:23 +10:00
Jan Klusacek b318ebf101 py/modbuiltins: Add support for rounding integers.
As per CPython semantics.  This feature is controlled by
MICROPY_PY_BUILTINS_ROUND_INT which is disabled by default.
2018-05-22 14:18:16 +10:00
Damien George 9630376dbc py/mpconfig.h: Be stricter when autodetecting machine endianness.
This patch changes 2 things in the endianness detection:

1. Don't assume that __BYTE_ORDER__ not being __ORDER_LITTLE_ENDIAN__ means
   that the machine is big endian, so add an explicit check that this macro
   is indeed __ORDER_BIG_ENDIAN__ (same with __BYTE_ORDER, __LITTLE_ENDIAN
   and __BIG_ENDIAN).  A machine could have PDP endianness.

2. Remove the checks which base their autodetection decision on whether any
   little or big endian macros are defined (eg __LITTLE_ENDIAN__ or
   __BIG_ENDIAN__).  Just because a system defines these does not mean it
   has that endianness.

See issue #3760.
2018-05-11 21:51:34 +10:00
Paul Sokolovsky 970eedce8f py/objdeque: Implement ucollections.deque type with fixed size.
So far, implements just append() and popleft() methods, required for
a normal queue. Constructor doesn't accept an arbitarry sequence to
initialize from (am empty deque is always created), so an empty tuple
must be passed as such. Only fixed-size deques are supported, so 2nd
argument (size) is required.

There's also an extension to CPython - if True is passed as 3rd argument,
append(), instead of silently overwriting the oldest item on queue
overflow, will throw IndexError. This behavior is desired in many
cases, where queues should store information reliably, instead of
silently losing some items.
2018-02-21 22:39:25 +11:00
Damien George 7e2a48858c py/modmicropython: Allow to have stack_use() func without mem_info().
The micropython.stack_use() function is useful to query the current C stack
usage, and it's inclusion in the micropython module doesn't need to be tied
to the inclusion of mem_info()/qstr_info() because it doesn't rely on any
of the code from these functions.  So this patch introduces the config
option MICROPY_PY_MICROPYTHON_STACK_USE which can be used to independently
control the inclusion of stack_use().  By default it is enabled if
MICROPY_PY_MICROPYTHON_MEM_INFO is enabled (thus not changing any of the
existing ports).
2018-02-20 18:30:22 +11:00
Damien George 209936880d py/builtinimport: Add compile-time option to disable external imports.
The new option is MICROPY_ENABLE_EXTERNAL_IMPORT and is enabled by default
so that the default behaviour is the same as before.  With it disabled
import is only supported for built-in modules, not for external files nor
frozen modules.  This allows to support targets that have no filesystem of
any kind and that only have access to pre-supplied built-in modules
implemented natively.
2018-02-20 18:00:44 +11:00
Damien George d77da83d55 py/objrange: Implement (in)equality comparison between range objects.
This feature is not often used so is guarded by the config option
MICROPY_PY_BUILTINS_RANGE_BINOP which is disabled by default.  With this
option disabled MicroPython will always return false when comparing two
range objects for equality (unless they are exactly the same object
instance).  This does not match CPython so if (in)equality between range
objects is needed then this option should be enabled.

Enabling this option costs between 100 and 200 bytes of code space
depending on the machine architecture.
2018-02-14 23:17:06 +11:00
Damien George 253f2bd7be py/compile: Combine compiler-opt of 2 and 3 tuple-to-tuple assignment.
This patch combines the compiler optimisation code for double and triple
tuple-to-tuple assignment, taking it from two separate if-blocks to one
combined if-block.  This can be done because the code for both of these
optimisations has a lot in common.  Combining them together reduces code
size for ports that have the triple-tuple optimisation enabled (and doesn't
change code size for ports that have it disabled).
2018-02-04 13:35:21 +11:00
Paul Sokolovsky 6364401666 py/objgenerator: Allow to pend an exception for next execution.
This implements .pend_throw(exc) method, which sets up an exception to be
triggered on the next call to generator's .__next__() or .send() method.
This is unlike .throw(), which immediately starts to execute the generator
to process the exception. This effectively adds Future-like capabilities
to generator protocol (exception will be raised in the future).

The need for such a method arised to implement uasyncio wait_for() function
efficiently (its behavior is clearly "Future" like, and normally would
require to introduce an expensive Future wrapper around all native
couroutines, like upstream asyncio does).

py/objgenerator: pend_throw: Return previous pended value.

This effectively allows to store an additional value (not necessary an
exception) in a coroutine while it's not being executed. uasyncio has
exactly this usecase: to mark a coro waiting in I/O queue (and thus
not executed in the normal scheduling queue), for the purpose of
implementing wait_for() function (cancellation of such waiting coro
by a timeout).
2017-12-15 20:20:36 +02:00
Damien George 2759bec858 py: Extend nan-boxing config to have 47-bit small integers.
The nan-boxing representation has an extra 16-bits of space to store
small-int values, and making use of it allows to create and manipulate full
32-bit positive integers (ie up to 0xffffffff) without using the heap.
2017-12-11 22:39:12 +11:00
Damien George 02d830c035 py: Introduce a Python stack for scoped allocation.
This patch introduces the MICROPY_ENABLE_PYSTACK option (disabled by
default) which enables a "Python stack" that allows to allocate and free
memory in a scoped, or Last-In-First-Out (LIFO) way, similar to alloca().

A new memory allocation API is introduced along with this Py-stack.  It
includes both "local" and "nonlocal" LIFO allocation.  Local allocation is
intended to be equivalent to using alloca(), whereby the same function must
free the memory.  Nonlocal allocation is where another function may free
the memory, so long as it's still LIFO.

Follow-up patches will convert all uses of alloca() and VLA to the new
scoped allocation API.  The old behaviour (using alloca()) will still be
available, but when MICROPY_ENABLE_PYSTACK is enabled then alloca() is no
longer required or used.

The benefits of enabling this option are (or will be once subsequent
patches are made to convert alloca()/VLA):
- Toolchains without alloca() can use this feature to obtain correct and
  efficient scoped memory allocation (compared to using the heap instead
  of alloca(), which is slower).
- Even if alloca() is available, enabling the Py-stack gives slightly more
  efficient use of stack space when calling nested Python functions, due to
  the way that compilers implement alloca().
- Enabling the Py-stack with the stackless mode allows for even more
  efficient stack usage, as well as retaining high performance (because the
  heap is no longer used to build and destroy stackless code states).
- With Py-stack and stackless enabled, Python-calling-Python is no longer
  recursive in the C mp_execute_bytecode function.

The micropython.pystack_use() function is included to measure usage of the
Python stack.
2017-12-11 13:49:09 +11:00
Paul Sokolovsky e7fc765880 unix/mpconfigport: Disable uio.resource_stream().
This function was implemented as an experiment, and was enabled only in
unix port. To remind, it allows to access arbitrary files frozen as
source modules (vs bytecode).

However, further experimentation showed that the same functionality can
be implemented with frozen bytecode. The process requires more steps, but
with suitable toolset it doesn't matter patch. This process is:

1. Convert binary files into "Python resource module" with
tools/mpy_bin2res.py.
2. Freeze as the bytecode.
3. Use micropython-lib's pkg_resources.resource_stream() to access it.

In other words, the extra step is using tools/mpy_bin2res.py (because
there would be wrapper for uio.resource_stream() anyway).

Going frozen bytecode route allows more flexibility, and same/additional
efficiency:

1. Frozen source support can be disabled altogether for additional code
savings.
2. Resources could be also accessed as a buffer, not just as a stream.

There're few caveats too:

1. It wasn't actually profiled the overhead of storing a resource in
"Python resource module" vs storing it directly, but it's assumed that
overhead is small.
2. The "efficiency" claim above applies to the case when resource
file is frozen as the bytecode. If it's not, it actually will take a
lot of RAM on loading. But in this case, the resource file should not
be used (i.e. generated) in the first place, and micropython-lib's
pkg_resources.resource_stream() implementation has the appropriate
fallback to read the raw files instead. This still poses some distribution
issues, e.g. to deployable to baremetal ports (which almost certainly
would require freezeing as the bytecode), a distribution package should
include the resource module. But for non-freezing deployment, presense
of resource module will lead to memory inefficiency.

All the discussion above reminds why uio.resource_stream() was implemented
in the first place - to address some of the issues above. However, since
then, frozen bytecode approach seems to prevail, so, while there're still
some issues to address with it, this change is being made.

This change saves 488 bytes for the unix x86_64 port.
2017-12-10 02:38:23 +02:00
Damien George da154fdaf9 py: Add config option to disable multiple inheritance.
This patch introduces a new compile-time config option to disable multiple
inheritance at the Python level: MICROPY_MULTIPLE_INHERITANCE.  It is
enabled by default.

Disabling multiple inheritance eliminates a lot of recursion in the call
graph (which is important for some embedded systems), and can be used to
reduce code size for ports that are really constrained (by around 200 bytes
for Thumb2 archs).

With multiple inheritance disabled all tests in the test-suite pass except
those that explicitly test for multiple inheritance.
2017-11-20 16:18:50 +11:00
stijn 79ed58f87b py/objnamedtuple: Add _asdict function if OrderedDict is supported 2017-11-12 14:16:54 +02:00
Paul Sokolovsky 1b146e9de9 py/mpconfig: Introduce reusable MP_HTOBE32(), etc. macros.
Macros to convert big-endian values to host byte order and vice-versa.
These were defined in adhoc way for some ports (e.g. esp8266), allow
reuse, provide default implementations, while allow ports to override.
2017-11-08 19:47:37 +02:00
Eric Poulsen 74ec52d857 extmod/modussl: Add finaliser support for ussl objects.
Per the comment found here
https://github.com/micropython/micropython-esp32/issues/209#issuecomment-339855157,
this patch adds finaliser code to prevent memory leaks from ussl objects,
which is especially useful when memory for a ussl context is allocated
outside the uPy heap.  This patch is in-line with the finaliser code found
in many modsocket implementations for various ports.

This feature is configured via MICROPY_PY_USSL_FINALISER and is disabled by
default because there may be issues using it when the ussl state *is*
allocated on the uPy heap, rather than externally.
2017-10-30 15:25:32 +11:00
Paul Sokolovsky 0e80f345f8 py/objtype: Introduce MICROPY_PY_ALL_INPLACE_SPECIAL_METHODS.
This allows to configure support for inplace special methods separately,
similar to "normal" and reverse special methods. This is useful, because
inplace methods are "the most optional" ones, for example, if inplace
methods aren't defined, the operation will be executed using normal
methods instead.

As a caveat, __iadd__ and __isub__ are implemented even if
MICROPY_PY_ALL_INPLACE_SPECIAL_METHODS isn't defined. This is similar
to the state of affairs before binary operations refactor, and allows
to run existing tests even if MICROPY_PY_ALL_INPLACE_SPECIAL_METHODS
isn't defined.
2017-10-27 22:29:15 +03:00
David Lechner 62849b7010 py: Add config option to print warnings/errors to stderr.
This adds a new configuration option to print runtime warnings and errors to
stderr. On Unix, CPython prints warnings and unhandled exceptions to stderr,
so the unix port here is configured to use this option.

The unix port already printed unhandled exceptions on the main thread to
stderr. This patch fixes unhandled exceptions on other threads and warnings
(issue #2838) not printing on stderr.

Additionally, a couple tests needed to be fixed to handle this new behavior.
This is done by also capturing stderr when running tests.
2017-09-26 11:59:11 +10:00
Damien George 44f0a4d1e7 py/mpconfig.h: Add note that using computed gotos in VM is not C99. 2017-09-18 23:53:33 +10:00
Paul Sokolovsky eb84a830df py/runtime: Implement dispatch for "reverse op" special methods.
If, for class X, X.__add__(Y) doesn't exist (or returns NotImplemented),
try Y.__radd__(X) instead.

This patch could be simpler, but requires undoing operand swap and
operation switch to get non-confusing error message in case __radd__
doesn't exist.
2017-09-10 17:05:57 +03:00
tll 68c28174d0 py/objstr: Add check for valid UTF-8 when making a str from bytes.
This patch adds a function utf8_check() to check for a valid UTF-8 encoded
string, and calls it when constructing a str from raw bytes.  The feature
is selectable at compile time via MICROPY_PY_BUILTINS_STR_UNICODE_CHECK and
is enabled if unicode is enabled.  It costs about 110 bytes on Thumb-2, 150
bytes on Xtensa and 170 bytes on x86-64.
2017-09-06 16:43:09 +10:00
Stefan Naumann ace9fb5405 py: Add verbose debug compile-time flag MICROPY_DEBUG_VERBOSE.
It enables all the DEBUG_printf outputs in the py/ source code.
2017-08-15 11:53:36 +10:00
Paul Sokolovsky bfc2092dc5 py/modsys: Initial implementation of sys.getsizeof().
Implemented as a new MP_UNARY_OP. This patch adds support lists, dicts and
instances.
2017-08-11 09:43:07 +03:00
Alexander Steffen 299bc62586 all: Unify header guard usage.
The code conventions suggest using header guards, but do not define how
those should look like and instead point to existing files. However, not
all existing files follow the same scheme, sometimes omitting header guards
altogether, sometimes using non-standard names, making it easy to
accidentally pick a "wrong" example.

This commit ensures that all header files of the MicroPython project (that
were not simply copied from somewhere else) follow the same pattern, that
was already present in the majority of files, especially in the py folder.

The rules are as follows.

Naming convention:
* start with the words MICROPY_INCLUDED
* contain the full path to the file
* replace special characters with _

In addition, there are no empty lines before #ifndef, between #ifndef and
one empty line before #endif. #endif is followed by a comment containing
the name of the guard macro.

py/grammar.h cannot use header guards by design, since it has to be
included multiple times in a single C file. Several other files also do not
need header guards as they are only used internally and guaranteed to be
included only once:
* MICROPY_MPHALPORT_H
* mpconfigboard.h
* mpconfigport.h
* mpthreadport.h
* pin_defs_*.h
* qstrdefs*.h
2017-07-18 11:57:39 +10:00
Damien George c408ed9fb1 py/mpconfig.h: Remove spaces in "Micro Python" and remove blank line. 2017-06-26 12:29:20 +10:00
Damien George bc76302eab py/modbuiltins: Add core-provided version of input() function.
The implementation is taken from stmhal/input.c, with code added to handle
ctrl-C.  This built-in is controlled by MICROPY_PY_BUILTINS_INPUT and is
disabled by default.  It uses readline() to capture input but this can be
overridden by defining the mp_hal_readline macro.
2017-06-01 16:02:49 +10:00
Ville Skyttä ca16c38210 various: Spelling fixes 2017-05-29 11:36:05 +03:00
Paul Sokolovsky d7da2dba07 py/modio: Implement uio.resource_stream(package, resource_path).
The with semantics of this function is close to
pkg_resources.resource_stream() function from setuptools, which
is the canonical way to access non-source files belonging to a package
(resources), regardless of what medium the package uses (e.g. individual
source files vs zip archive). In the case of MicroPython, this function
allows to access resources which are frozen into the executable, besides
accessing resources in the file system.

This is initial stage of the implementation, which actually doesn't
implement "package" part of the semantics, just accesses frozen resources
from "root", or filesystem resource - from current dir.
2017-05-03 01:47:08 +03:00
Damien George ae54fbf166 py/compile: Add COMP_RETURN_IF_EXPR option to enable return-if-else opt.
With this optimisation enabled the compiler optimises the if-else
expression within a return statement.  The optimisation reduces bytecode
size by 2 bytes for each use of such a return-if-else statement.  Since
such a statement is not often used, and costs bytes for the code, the
feature is disabled by default.

For example the following code:

    def f(x):
        return 1 if x else 2

compiles to this bytecode with the optimisation disabled (left column is
bytecode offset in bytes):

    00 LOAD_FAST 0
    01 POP_JUMP_IF_FALSE 8
    04 LOAD_CONST_SMALL_INT 1
    05 JUMP 9
    08 LOAD_CONST_SMALL_INT 2
    09 RETURN_VALUE

and to this bytecode with the optimisation enabled:

    00 LOAD_FAST 0
    01 POP_JUMP_IF_FALSE 6
    04 LOAD_CONST_SMALL_INT 1
    05 RETURN_VALUE
    06 LOAD_CONST_SMALL_INT 2
    07 RETURN_VALUE

So the JUMP to RETURN_VALUE is optimised and replaced by RETURN_VALUE,
saving 2 bytes and making the code a bit faster.
2017-04-22 14:58:01 +10:00
Damien George bbb4b9822f py/modmicropython: Add micropython.kbd_intr() function.
It controls the character that's used to (asynchronously) raise a
KeyboardInterrupt exception.  Passing "-1" allows to disable the
interception of the interrupt character (as long as a port allows such a
behaviour).
2017-04-18 17:24:30 +10:00
Damien George a73501b1d6 py/objfloat: Add implementation of high-quality float hashing.
Disabled by default.
2017-04-12 13:38:17 +10:00
Paul Sokolovsky 9a973977bb py/objstr: Use MICROPY_FULL_CHECKS for range checking when constructing bytes.
Split this setting from MICROPY_CPYTHON_COMPAT. The idea is to be able to
keep MICROPY_CPYTHON_COMPAT disabled, but still pass more of regression
testsuite. In particular, this fixes last failing test in basics/ for
Zephyr port.
2017-04-02 21:20:07 +03:00
Damien George 4c307bfba1 all: Move BYTES_PER_WORD definition from ports to py/mpconfig.h
It can still be overwritten by a port in mpconfigport.h but for almost
all cases one can use the provided default.
2017-04-01 11:39:38 +11:00
Damien George 6e74d24f30 py: Add micropython.schedule() function and associated runtime code. 2017-03-20 15:20:26 +11:00
Damien George f563406d2e py/moduerrno: Make uerrno.errorcode dict configurable.
It's configured by MICROPY_PY_UERRNO_ERRORCODE and enabled by default
(since that's the behaviour before this patch).

Without this dict the lookup of errno codes to strings must use the
uerrno module itself.
2017-02-22 12:58:11 +11:00
Damien George f6c22a0679 py/vm: Add MICROPY_PY_THREAD_GIL_VM_DIVISOR option.
This improves efficiency of GIL release within the VM, by only doing the
release after a fixed number of jump-opcodes have executed in the current
thread.
2017-02-15 11:28:15 +11:00
dmazzella 18e6569166 py/objtype: Implement __delattr__ and __setattr__.
This patch implements support for class methods __delattr__ and __setattr__
for customising attribute access.  It is controlled by the config option
MICROPY_PY_DELATTR_SETATTR and is disabled by default.
2017-02-09 12:40:15 +11:00
Damien George a19b5a01ce py/mpconfig.h: Move PY_BUILTINS_POW3 config option to diff part of file.
With so many config options it's good to (at least try to) keep them
grouped into logical sections.
2017-02-03 12:35:48 +11:00
Nicko van Someren df0117c8ae py: Added optimised support for 3-argument calls to builtin.pow()
Updated modbuiltin.c to add conditional support for 3-arg calls to
pow() using MICROPY_PY_BUILTINS_POW3 config parameter. Added support in
objint_mpz.c for for optimised implementation.
2017-02-02 22:23:10 +03:00
Damien George 1808b2e8d5 extmod: Remove MICROPY_FSUSERMOUNT and related files.
Replaced by MICROPY_VFS and the VFS sub-system.
2017-01-30 12:26:07 +11:00
Damien George 8beba7310f extmod/vfs_fat: Remove MICROPY_READER_FATFS component. 2017-01-30 12:26:07 +11:00
Damien George dcb9ea7215 extmod: Add generic VFS sub-system.
This provides mp_vfs_XXX functions (eg mount, open, listdir) which are
agnostic to the underlying filesystem type, and just require an object with
the relevant filesystem-like methods (eg .mount, .open, .listidr) which can
then be mounted.

These mp_vfs_XXX functions would typically be used by a port to implement
the "uos" module, and mp_vfs_open would be the builtin open function.

This feature is controlled by MICROPY_VFS, disabled by default.
2017-01-27 17:19:06 +11:00
Damien George f5172af1c4 py/builtinhelp: Implement help('modules') to list available modules.
This is how CPython does it, and it's very useful to help users discover
the available modules for a given port, especially built-in and frozen
modules.  The function does not list modules that are in the filesystem
because this would require a fair bit of work to do correctly, and is very
port specific (depending on the filesystem).
2017-01-22 12:12:54 +11:00
Damien George 9f04dfb568 py: Add builtin help function to core, with default help msg.
This builtin is configured using MICROPY_PY_BUILTINS_HELP, and is disabled
by default.
2017-01-22 11:56:16 +11:00
Damien George c305ae3243 py/lexer: Permanently disable the mp_lexer_show_token function.
The lexer is very mature and this debug function is no longer used.  If
it's really needed one can uncomment it and recompile.
2016-12-22 10:49:54 +11:00
Paul Sokolovsky d02f6a9956 extmod/modutimeq: Refactor into optimized class.
import utimeq, utime
    # Max queue size, the queue allocated statically on creation
    q = utimeq.utimeq(10)
    q.push(utime.ticks_ms(), data1, data2)
    res = [0, 0, 0]
    # Items in res are filled up with results
    q.pop(res)
2016-12-22 00:29:32 +03:00
Damien George 7f1da0a03b py: Add MICROPY_KBD_EXCEPTION config option to provide mp_kbd_exception.
Defining and initialising mp_kbd_exception is boiler-plate code and so the
core runtime can provide it, instead of each port needing to do it
themselves.

The exception object is placed in the VM state rather than on the heap.
2016-12-15 13:00:19 +11:00
Paul Sokolovsky 403c93053e py/mpconfig.h: Enable MICROPY_PY_SYS_EXIT by default.
sys.exit() is an important function to terminate a program. In particular,
the testsuite relies on it to skip tests (i.e. any other functionality may
be disabled, but sys.exit() is required to at least report that properly).
2016-12-14 21:22:05 +03:00
Damien George f76b1bfa9f py: Add inline Xtensa assembler.
This patch adds the MICROPY_EMIT_INLINE_XTENSA option, which, when
enabled, allows the @micropython.asm_xtensa decorator to be used.

The following opcodes are currently supported (ax is a register, a0-a15):

    ret_n()
    callx0(ax)
    j(label)
    jx(ax)

    beqz(ax, label)
    bnez(ax, label)
    mov(ax, ay)
    movi(ax, imm) # imm can be full 32-bit, uses l32r if needed

    and_(ax, ay, az)
    or_(ax, ay, az)
    xor(ax, ay, az)
    add(ax, ay, az)
    sub(ax, ay, az)
    mull(ax, ay, az)

    l8ui(ax, ay, imm)
    l16ui(ax, ay, imm)
    l32i(ax, ay, imm)
    s8i(ax, ay, imm)
    s16i(ax, ay, imm)
    s32i(ax, ay, imm)
    l16si(ax, ay, imm)
    addi(ax, ay, imm)

    ball(ax, ay, label)
    bany(ax, ay, label)
    bbc(ax, ay, label)
    bbs(ax, ay, label)
    beq(ax, ay, label)
    bge(ax, ay, label)
    bgeu(ax, ay, label)
    blt(ax, ay, label)
    bnall(ax, ay, label)
    bne(ax, ay, label)
    bnone(ax, ay, label)

Upon entry to the assembly function the registers a0, a12, a13, a14 are
pushed to the stack and the stack pointer (a1) decreased by 16.  Upon
exit, these registers and the stack pointer are restored, and ret.n is
executed to return to the caller (caller address is in a0).

Note that the ABI for the Xtensa emitters is non-windowing.
2016-12-09 17:07:38 +11:00
Damien George ad297a1950 py: Allow inline-assembler emitter to be generic.
This patch refactors some code so that it is easier to integrate new
inline assemblers for different architectures other than ARM Thumb.
2016-12-09 17:06:21 +11:00
Damien George 8e5aced1fd py: Integrate Xtensa assembler into native emitter.
The config option MICROPY_EMIT_XTENSA can now be enabled to target the
Xtensa architecture with @micropython.native and @micropython.viper
decorators.
2016-12-09 16:51:49 +11:00
Paul Sokolovsky 8f5bc3ffc0 stmhal/moduselect: Move to extmod/ for reuse by other ports. 2016-11-21 00:05:56 +03:00
Damien George 6b239c271c py: Factor out persistent-code reader into separate files.
Implementations of persistent-code reader are provided for POSIX systems
and systems using FatFS.  Macros to use these are MICROPY_READER_POSIX and
MICROPY_READER_FATFS respectively.  If an alternative implementation is
needed then a port can define the function mp_reader_new_file.
2016-11-16 18:13:50 +11:00
Damien George 561844f3ba py: Add MICROPY_FLOAT_CONST macro for defining float constants.
All float constants in the core should use this macro to prevent
unnecessary creation of double-precision floats, which makes code less
efficient.
2016-11-03 12:33:01 +11:00
Colin Hogben 828df54bfe py: Change config default so m_malloc0 uses memset if GC not enabled.
With MICROPY_ENABLE_GC set to false the alternate memory manager may not
clear all memory that is allocated, so it must be cleared in m_malloc0.
2016-11-03 10:16:31 +11:00
Paul Sokolovsky 76146b3d9a extmod/utime_mphal: Allow ticks functions period be configurable by a port.
Using MICROPY_PY_UTIME_TICKS_PERIOD config var.
2016-10-30 03:02:07 +03:00
Paul Sokolovsky a97284423e extmod/utime_mphal: Factor out implementations in terms of mp_hal_* for reuse.
As long as a port implement mp_hal_sleep_ms(), mp_hal_ticks_ms(), etc.
functions, it can just use standard implementations of utime.sleel_ms(),
utime.ticks_ms(), etc. Python-level functions.
2016-10-14 20:14:01 +03:00
Delio Brignoli e2ac8bb3f1 py: Add MICROPY_USE_INTERNAL_PRINTF option, defaults to enabled.
This new config option allows to control whether MicroPython uses its own
internal printf or not (if not, an external one should be linked in).
Accompanying this new option is the inclusion of lib/utils/printf.c in the
core list of source files, so that ports no longer need to include it
themselves.
2016-09-05 12:18:53 +10:00
Damien George 0823c1baf8 extmod: Add machine_spi with generic SPI C-protocol and helper methods.
The idea is that all ports can use these helper methods and only need to
provide initialisation of the SPI bus, as well as a single transfer
function.  The coding pattern follows the stream protocol and helper
methods.
2016-09-01 15:07:20 +10:00
Damien George 5ffe1d8dc0 py/gc: Add MICROPY_GC_CONSERVATIVE_CLEAR option to always zero memory.
There can be stray pointers in memory blocks that are not properly zero'd
after allocation.  This patch adds a new config option to always zero all
allocated memory (via gc_alloc and gc_realloc) and hence help to eliminate
stray pointers.

See issue #2195.
2016-08-26 15:35:26 +10:00
Paul Sokolovsky c428367543 extmod/modubinascii: Make crc32() support configurable.
Disable by default, enable in unix port.
2016-08-24 18:28:43 +03:00
Paul Sokolovsky 1bc2911174 py/mpconfig.h: Define MP_ALWAYSINLINE for reuse.
Similar to existing MP_NOINLINE.
2016-08-07 22:36:05 +03:00
Paul Sokolovsky 56eb25f049 py/objstr: Make .partition()/.rpartition() methods configurable.
Default is disabled, enabled for unix port. Saves 600 bytes on x86.
2016-08-07 06:46:55 +03:00
Paul Sokolovsky 61e77a4e88 py/mpconfig.h: Add MICROPY_STREAMS_POSIX_API setting.
To filter out even prototypes of mp_stream_posix_*() functions, which
require POSIX types like ssize_t & off_t, which may be not available in
some ports.
2016-07-30 20:05:56 +03:00
Paul Sokolovsky a1b442bc07 py/mpconfig.h: Fix description for MICROPY_PY_STR_BYTES_CMP_WARN. 2016-07-22 00:46:24 +03:00
Paul Sokolovsky 707cae7494 py/obj: Issue a warning when str and bytes objects are compared.
Something like:

if foo == "bar":

will be always false if foo is b"bar". In CPython, warning is issued if
interpreter is started as "python3 -b". In MicroPython,
MICROPY_PY_STR_BYTES_CMP_WARN setting controls it.
2016-07-22 00:34:34 +03:00
Paul Sokolovsky 93e353e384 py/gc: Implement GC running by allocation threshold.
Currently, MicroPython runs GC when it could not allocate a block of memory,
which happens when heap is exhausted. However, that policy can't work well
with "inifinity" heaps, e.g. backed by a virtual memory - there will be a
lot of swap thrashing long before VM will be exhausted. Instead, in such
cases "allocation threshold" policy is used: a GC is run after some number of
allocations have been made. Details vary, for example, number or total amount
of allocations can be used, threshold may be self-adjusting based on GC
outcome, etc.

This change implements a simple variant of such policy for MicroPython. Amount
of allocated memory so far is used for threshold, to make it useful to typical
finite-size, and small, heaps as used with MicroPython ports. And such GC policy
is indeed useful for such types of heaps too, as it allows to better control
fragmentation. For example, if a threshold is set to half size of heap, then
for an application which usually makes big number of small allocations, that
will (try to) keep half of heap memory in a nice defragmented state for an
occasional large allocation.

For an application which doesn't exhibit such behavior, there won't be any
visible effects, except for GC running more frequently, which however may
affect performance. To address this, the GC threshold is configurable, and
by default is off so far. It's configured with gc.threshold(amount_in_bytes)
call (can be queries without an argument).
2016-07-21 00:37:30 +03:00
Paul Sokolovsky 737bd9c314 py/mpconfig.h: Mention MICROPY_PY_BTREE config option.
However, as it requires linking with external libraries, it actually
should be ste on Makefile level.
2016-07-02 14:57:42 +03:00
Damien George 4cec63a9db py: Implement a simple global interpreter lock.
This makes the VM/runtime thread safe, at the cost of not being able to
run code in parallel.
2016-06-28 11:28:50 +01:00
Damien George 27cc07721b py: Add basic _thread module, with ability to start a new thread. 2016-06-28 11:28:48 +01:00
Paul Sokolovsky 0f5bf1aafe py/mpconfig.h: MP_NOINLINE is universally useful, move from unix port. 2016-06-15 23:52:00 +03:00
Damien George 33168081f4 extmod/machine: Add MICROPY_PY_MACHINE_PULSE config for time_pulse_us.
Since not all ports that enable the machine module have the pin HAL
functions.
2016-05-31 14:25:19 +01:00
Paul Sokolovsky 1b5abfcaae py/objstr: Implement str.center().
Disabled by default, enabled in unix port. Need for this method easily
pops up when working with text UI/reporting, and coding workalike
manually again and again counter-productive.
2016-05-22 00:13:44 +03:00
Damien George 596a3feb8f py: Add uerrno module, with errno constants and dict. 2016-05-10 23:30:39 +01:00
Damien George 3f56fd64b8 py: Add mperrno.h file with uPy defined errno constants. 2016-05-10 23:30:39 +01:00
Damien George 0a2e9650f5 py: Add ability to have frozen persistent bytecode from .mpy files.
The config variable MICROPY_MODULE_FROZEN is now made of two separate
parts: MICROPY_MODULE_FROZEN_STR and MICROPY_MODULE_FROZEN_MPY.  This
allows to have none, either or both of frozen strings and frozen mpy
files (aka frozen bytecode).
2016-04-13 16:07:47 +01:00
pohmelie 81ebba7e02 py: add async/await/async for/async with syntax
They are sugar for marking function as generator, "yield from"
and pep492 python "semantically equivalents" respectively.

@dpgeorge was the original author of this patch, but @pohmelie made
changes to implement `async for` and `async with`.
2016-04-13 15:26:38 +01:00
Damien George d083712224 extmod: Add generic machine.I2C class, with bit-bang I2C.
Should work on any machine that provides the correct pin functions.
2016-04-12 14:06:54 +01:00
Damien George 53ad681ed1 extmod: Add initial framebuf module. 2016-04-12 14:06:53 +01:00
Paul Sokolovsky 5d93dfbc2c py/modio: Initial implementation of io.BufferedWriter class.
Just .write() method implemented currently.
2016-03-25 01:10:49 +02:00
Paul Sokolovsky 24342dd65e extmod/modwebsocket: Start module for WebSocket helper functions.
Currently, only write support is implemented (of limited buffer size).
2016-03-24 19:16:00 +02:00
Damien George ea23520403 py: Add MICROPY_DYNAMIC_COMPILER option to config compiler at runtime.
This new compile-time option allows to make the bytecode compiler
configurable at runtime by setting the fields in the mp_dynamic_compiler
structure.  By using this feature, the compiler can generate bytecode
that targets any MicroPython runtime/VM, regardless of the host and
target compile-time settings.

Options so far that fall under this dynamic setting are:
- maximum number of bits that a small int can hold;
- whether caching of lookups is used in the bytecode;
- whether to use unicode strings or not (lexer behaviour differs, and
  therefore generated string constants differ).
2016-02-25 10:05:46 +00:00
Damien George 40d8430ee3 py/vm: Add macros to hook into various points in the VM.
These can be used to insert arbitrary checks, polling, etc into the VM.
They are left general because the VM is a highly tuned loop and it should
be up to a given port how that port wants to modify the VM internals.

One common use would be to insert a polling check, but only done after
a certain number of opcodes were executed, so as not to slow down the VM
too much.  For example:

 #define MICROPY_VM_HOOK_COUNT (30)
 #define MICROPY_VM_HOOK_INIT static uint vm_hook_divisor = MICROPY_VM_HOOK_COUNT
 #define MICROPY_VM_HOOK_POLL if (--vm_hook_divisor == 0) { \
     vm_hook_divisor = MICROPY_VM_HOOK_COUNT;
     extern void vm_hook_function(void);
     vm_hook_function();
 }
 #define MICROPY_VM_HOOK_LOOP MICROPY_VM_HOOK_POLL
 #define MICROPY_VM_HOOK_RETURN MICROPY_VM_HOOK_POLL
2016-02-17 09:02:19 +00:00
Doug Currie 2e2e15cec2 py/mpz: Complete implementation of mpz_{and,or,xor} for negative args.
For these 3 bitwise operations there are now fast functions for
positive-only arguments, and general functions for arbitrary sign
arguments (the fast functions are the existing implementation).

By default the fast functions are not used (to save space) and instead
the general functions are used for all operations.

Enable MICROPY_OPT_MPZ_BITWISE to use the fast functions for positive
arguments.
2016-02-03 22:13:39 +00:00
Damien George a53af6c875 extmod/modurandom: Add some extra random functions.
Functions added are:
- randint
- randrange
- choice
- random
- uniform

They are enabled with configuration variable
MICROPY_PY_URANDOM_EXTRA_FUNCS, which is disabled by default.  It is
enabled for unix coverage build and stmhal.
2016-01-26 15:27:00 +00:00
Paul Sokolovsky a58a91eb04 extmod/modurandom: Add "urandom" module.
Seedable and reproducible pseudo-random number generator. Implemented
functions are getrandbits(n) (n <= 32) and seed().

The algorithm used is Yasmarang by Ilya Levin:
http://www.literatecode.com/yasmarang
2016-01-17 12:13:01 +02:00
Paul Sokolovsky 00ee84e1e1 py: Clean up instantiation of dupterm object.
To comply with already established scheme for extmod's.
2016-01-01 14:22:57 +02:00
Paul Sokolovsky 9bbfd5efd4 py/mpconfig: Make configuration of dupterm object reusable. 2016-01-01 13:16:18 +02:00
Paul Sokolovsky 1c9210bc2b unix/unix_mphal: Raise KeyboardInterrupt straight from signal handler.
POSIX doesn't guarantee something like that to work, but it works on any
system with careful signal implementation. Roughly, the requirement is
that signal handler is executed in the context of the process, its main
thread, etc. This is true for Linux. Also tested to work without issues
on MacOSX.
2015-12-23 00:07:00 +02:00
stijn 0a4eb4dbf2 py/mpprint: Fix printing of 64bit integers for 64bit windows builds
This makes all tests pass again for 64bit windows builds which would
previously fail for anything printing ranges (builtin_range/unpack1)
because they were printed as range( ld, ld ).

This is done by reusing the mp_vprintf implementation for MICROPY_OBJ_REPR_D
for 64bit windows builds (both msvc and mingw-w64) since the format specifier
used for 64bit integers is also %lld, or %llu for the unsigned version.

Note these specifiers used to be fetched from inttypes.h, which is the
C99 way of working with printf/scanf in a portable way, but mingw-w64
wants to be backwards compatible with older MS C runtimes and uses
the non-portable %I64i instead of %lld in inttypes.h, so remove the use
of said header again in mpconfig.h and define the specifiers manually.
2015-12-19 01:15:58 +00:00
Damien George dd5353a405 py: Add MICROPY_ENABLE_COMPILER and MICROPY_PY_BUILTINS_EVAL_EXEC opts.
MICROPY_ENABLE_COMPILER can be used to enable/disable the entire compiler,
which is useful when only loading of pre-compiled bytecode is supported.
It is enabled by default.

MICROPY_PY_BUILTINS_EVAL_EXEC controls support of eval and exec builtin
functions.  By default they are only included if MICROPY_ENABLE_COMPILER
is enabled.

Disabling both options saves about 40k of code size on 32-bit x86.
2015-12-18 12:35:44 +00:00
pohmelie 354e688d8e py: Add MICROPY_PY_BUILTINS_MIN_MAX, disable for minimal ports. 2015-12-07 18:56:25 +02:00
Paul Sokolovsky 1a1d11fa32 py/modsys: Implement sys.modules.
This for example will allow people to reload modules which didn't load
successfully (e.g. due to syntax error).
2015-12-05 00:13:29 +02:00
Paul Sokolovsky b4eccfd02d py/mpconfig: Actually allow to override MICROPY_BYTES_PER_GC_BLOCK. 2015-12-03 01:58:25 +02:00
Paul Sokolovsky 75feece208 py/gc: Make GC block size be configurable. 2015-12-03 01:40:52 +02:00
Damien George b8cfb0d7b2 py: Add support for 64-bit NaN-boxing object model, on 32-bit machine.
To use, put the following in mpconfigport.h:

    #define MICROPY_OBJ_REPR (MICROPY_OBJ_REPR_D)
    #define MICROPY_FLOAT_IMPL (MICROPY_FLOAT_IMPL_DOUBLE)
    typedef int64_t mp_int_t;
    typedef uint64_t mp_uint_t;
    #define UINT_FMT "%llu"
    #define INT_FMT "%lld"

Currently does not work with native emitter enabled.
2015-11-29 14:25:36 +00:00
Paul Sokolovsky f32020ef3d py/mpconfig.h: Allow to build without alloca() for ANSI C compliance.
Define MICROPY_NO_ALLOCA=1 and memory will be allocated from heap instead
and freed by garbage collection.
2015-11-25 23:24:51 +02:00
Paul Sokolovsky f0fbab7ca7 extmod/fsusermount: Make configurable with MICROPY_FSUSERMOUNT. 2015-11-25 13:19:36 +02:00
stijn 3baf6b5319 windows/py: Support 64bit mingw-w64 builds
- add mp_int_t/mp_uint_t typedefs in mpconfigport.h
- fix integer suffixes/formatting in mpconfig.h and mpz.h
- use MICROPY_NLR_SETJMP=1 in Makefile since the current nlrx64.S
  implementation causes segfaults in gc_free()
- update README
2015-11-24 17:34:14 +02:00
Damien George d8c834c95d py: Add MICROPY_PERSISTENT_CODE_LOAD/SAVE to load/save bytecode.
MICROPY_PERSISTENT_CODE must be enabled, and then enabling
MICROPY_PERSISTENT_CODE_LOAD/SAVE (either or both) will allow loading
and/or saving of code (at the moment just bytecode) from/to a .mpy file.
2015-11-13 12:49:18 +00:00
Damien George c8e9c0d89a py: Add MICROPY_PERSISTENT_CODE so code can persist beyond the runtime.
Main changes when MICROPY_PERSISTENT_CODE is enabled are:

- qstrs are encoded as 2-byte fixed width in the bytecode
- all pointers are removed from bytecode and put in const_table (this
  includes const objects and raw code pointers)

Ultimately this option will enable persistence for not just bytecode but
also native code.
2015-11-13 12:49:18 +00:00
Damien George 8b8d189bc0 py: Adjust object repr C (30-bit stuffed float) to reduce code size.
This patch adds/subtracts a constant from the 30-bit float representation
so that str/qstr representations are favoured: they now have all the high
bits set to zero.  This makes encoding/decoding qstr strings more
efficient (and they are used more often than floats, which are now
slightly less efficient to encode/decode).

Saves about 300 bytes of code space on Thumb 2 arch.
2015-11-06 23:25:10 +00:00
Damien George 183edefddd py: Add object repr "C", where 30-bit floats are stuffed in obj word.
This new object representation puts floats into the object word instead
of on the heap, at the expense of reducing their precision to 30 bits.
It only makes sense when the word size is 32-bits.
2015-10-20 12:38:54 +01:00
Damien George e813541e3f py: Add option for inline assembler to support ARMv7-M instructions.
Cortex-M0, M0+ and M1 only have ARMv6-M Thumb/Thumb2 instructions.  M3,
M4 and M7 have a superset of these, named ARMv7-M.  This patch adds a
config option to enable support of the superset of instructions.
2015-10-16 22:08:57 +01:00
Damien George 4300c7dba2 py: Remove dependency on printf/fwrite in mp_plat_print.
See issue #1500.
2015-10-15 00:05:55 +01:00
Damien George 3c9c3687d6 py: Add support to call __init__ from a builtin module on first import. 2015-10-12 13:46:01 +01:00
Damien George 64f2b213bb py: Move constant folding from compiler to parser.
It makes much more sense to do constant folding in the parser while the
parse tree is being built.  This eliminates the need to create parse
nodes that will just be folded away.  The code is slightly simpler and a
bit smaller as well.

Constant folding now has a configuration option,
MICROPY_COMP_CONST_FOLDING, which is enabled by default.
2015-10-12 12:58:45 +01:00
Paul Sokolovsky aaa8867d4a modussl: SSL socket wrapper module based on axTLS. 2015-10-06 18:10:39 +03:00
Damien George 58e0f4ac50 py: Allocate parse nodes in chunks to reduce fragmentation and RAM use.
With this patch parse nodes are allocated sequentially in chunks.  This
reduces fragmentation of the heap and prevents waste at the end of
individually allocated parse nodes.

Saves roughly 20% of RAM during parse stage.
2015-10-02 00:11:11 +01:00
Tom Soulanille aeb62f9ae3 py/objslice: Make slice attributes (start/stop/step) readable.
Configurable with MICROPY_PY_BUILTINS_SLICE_ATTRS.  Disabled by default.
2015-09-15 21:59:20 +01:00
Damien George 0af73014cc lib/mp-readline: Add auto-indent support.
4 spaces are added at start of line to match previous indent, and if
previous line ended in colon.

Backspace deletes 4 space if only spaces begin a line.

Configurable via MICROPY_REPL_AUTO_INDENT.  Disabled by default.
2015-09-12 22:07:23 +01:00
Paul Sokolovsky 22ff397fb1 py: Add MICROPY_PY_BUILTINS_FILTER, disable for minimal ports.
Saves 320 bytes on x86.
2015-08-20 01:05:11 +03:00
Damien George 65dc960e3b unix-cpy: Remove unix-cpy. It's no longer needed.
unix-cpy was originally written to get semantic equivalent with CPython
without writing functional tests.  When writing the initial
implementation of uPy it was a long way between lexer and functional
tests, so the half-way test was to make sure that the bytecode was
correct.  The idea was that if the uPy bytecode matched CPython 1-1 then
uPy would be proper Python if the bytecodes acted correctly.  And having
matching bytecode meant that it was less likely to miss some deep
subtlety in the Python semantics that would require an architectural
change later on.

But that is all history and it no longer makes sense to retain the
ability to output CPython bytecode, because:

1. It outputs CPython 3.3 compatible bytecode.  CPython's bytecode
changes from version to version, and seems to have changed quite a bit
in 3.5.  There's no point in changing the bytecode output to match
CPython anymore.

2. uPy and CPy do different optimisations to the bytecode which makes it
harder to match.

3. The bytecode tests are not run.  They were never part of Travis and
are not run locally anymore.

4. The EMIT_CPYTHON option needs a lot of extra source code which adds
heaps of noise, especially in compile.c.

5. Now that there is an extensive test suite (which tests functionality)
there is no need to match the bytecode.  Some very subtle behaviour is
tested with the test suite and passing these tests is a much better
way to stay Python-language compliant, rather than trying to match
CPy bytecode.
2015-08-17 12:51:26 +01:00
Damien George d8a7f8bff2 py: Disable REPL EMACS key bindings by default. 2015-07-26 15:49:13 +01:00
Tom Soulanille 7d588b0c7c lib/mp-readline: Add emacs-style control characters for cursor movement.
Disabled by default.  Adds 108 bytes to Thumb2 arch when enabled.
2015-07-26 15:22:13 +01:00
Damien George c3bd9415cc py: Make qstr hash size configurable, defaults to 2 bytes.
This patch makes configurable, via MICROPY_QSTR_BYTES_IN_HASH, the
number of bytes used for a qstr hash.  It was originally fixed at 2
bytes, and now defaults to 2 bytes.  Setting it to 1 byte will save
ROM and RAM at a small expense of hash collisions.
2015-07-20 11:03:13 +00:00
Damien George ade9a05236 py: Improve allocation policy of qstr data.
Previous to this patch all interned strings lived in their own malloc'd
chunk.  On average this wastes N/2 bytes per interned string, where N is
the number-of-bytes for a quanta of the memory allocator (16 bytes on 32
bit archs).

With this patch interned strings are concatenated into the same malloc'd
chunk when possible.  Such chunks are enlarged inplace when possible,
and shrunk to fit when a new chunk is needed.

RAM savings with this patch are highly varied, but should always show an
improvement (unless only 3 or 4 strings are interned).  New version
typically uses about 70% of previous memory for the qstr data, and can
lead to savings of around 10% of total memory footprint of a running
script.

Costs about 120 bytes code size on Thumb2 archs (depends on how many
calls to gc_realloc are made).
2015-07-14 22:56:32 +01:00
Daniel Campora 077812b2ab py: Add TimeoutError exception subclassed from OSError.
The TimeoutError is useful for some modules, specially the the
socket module. TimeoutError can then be alised to socket.timeout
and then Python code can differentiate between socket.error and
socket.timeout.
2015-07-02 11:53:08 +02:00
Damien George 06593fb0f2 py: Use a wrapper to explicitly check self argument of builtin methods.
Previous to this patch a call such as list.append(1, 2) would lead to a
seg fault.  This is because list.append is a builtin method and the first
argument to such methods is always assumed to have the correct type.

Now, when a builtin method is extracted like this it is wrapped in a
checker object which checks the the type of the first argument before
calling the builtin function.

This feature is contrelled by MICROPY_BUILTIN_METHOD_CHECK_SELF_ARG and
is enabled by default.

See issue #1216.
2015-06-20 16:39:39 +01:00
Damien George 4e4772bb5b py: Add further autodetection of endianess in mpconfig.h.
This patch was needed for gcc 4.4.
2015-05-30 23:12:30 +01:00
Damien George 3c4b5d4281 stmhal: Implement sys.std{in,out,err}.buffer, for raw byte mode.
It's configurable and only enabled for stmhal port.
2015-05-24 14:31:33 +01:00
Paul Sokolovsky 5ab5ac5448 modbuiltins: Add NotImplemented builtin constant.
From https://docs.python.org/3/library/constants.html#NotImplemented :
"Special value which should be returned by the binary special methods
(e.g. __eq__(), __lt__(), __add__(), __rsub__(), etc.) to indicate
that the operation is not implemented with respect to the other type;
may be returned by the in-place binary special methods (e.g. __imul__(),
__iand__(), etc.) for the same purpose. Its truth value is true."

Some people however appear to abuse it to mean "no value" when None is
a legitimate value (don't do that).
2015-05-04 19:45:53 +03:00
Paul Sokolovsky 0116218fa8 modmachine: Add new module to access hardware, starting with physical memory.
Refactored from "stm" module, provides mem8, mem16, mem32 objects with
array subscript syntax.
2015-05-04 13:05:12 +03:00
Paul Sokolovsky 8b85d14b92 modsys: Add basic sys.exc_info() implementation.
The implementation is very basic and non-compliant and provided solely for
CPython compatibility. The function itself is bad Python2 heritage, its
usage is discouraged.
2015-04-25 03:49:23 +03:00
Damien George 5aa311d330 py: Add attrtuple object, for space-efficient tuples with attr access.
If you need the functionality of a namedtuple but will only make 1 or a
few instances, then use an attrtuple instead.
2015-04-21 14:14:24 +00:00
= 5008972fef py/inlinethumb: Support for core floating point instructions.
Adds support for the following Thumb2 VFP instructions, via the option
MICROPY_EMIT_INLINE_THUMB_FLOAT:

vcmp
vsqrt
vneg
vcvt_f32_to_s32
vcvt_s32_to_f32
vmrs
vmov
vldr
vstr
vadd
vsub
vmul
vdiv
2015-04-19 15:47:05 +01:00
Damien George 7f9d1d6ab9 py: Overhaul and simplify printf/pfenv mechanism.
Previous to this patch the printing mechanism was a bit of a tangled
mess.  This patch attempts to consolidate printing into one interface.

All (non-debug) printing now uses the mp_print* family of functions,
mainly mp_printf.  All these functions take an mp_print_t structure as
their first argument, and this structure defines the printing backend
through the "print_strn" function of said structure.

Printing from the uPy core can reach the platform-defined print code via
two paths: either through mp_sys_stdout_obj (defined pert port) in
conjunction with mp_stream_write; or through the mp_plat_print structure
which uses the MP_PLAT_PRINT_STRN macro to define how string are printed
on the platform.  The former is only used when MICROPY_PY_IO is defined.

With this new scheme printing is generally more efficient (less layers
to go through, less arguments to pass), and, given an mp_print_t*
structure, one can call mp_print_str for efficiency instead of
mp_printf("%s", ...).  Code size is also reduced by around 200 bytes on
Thumb2 archs.
2015-04-16 14:30:16 +00:00
Damien George 4dea922610 py: Adjust some spaces in code style/format, purely for consistency. 2015-04-09 15:29:54 +00:00
Paul Sokolovsky 282ca09f8e py: Add MICROPY_PY_BUILTINS_REVERSED, disable for minimal ports. 2015-04-07 00:17:11 +03:00
Paul Sokolovsky e2d44e30c7 py: Add MICROPY_PY_BUILTINS_ENUMERATE, disable for minimal ports. 2015-04-06 23:51:29 +03:00
Paul Sokolovsky ac2f7a7f6a objstr: Add .splitlines() method.
splitlines() occurs ~179 times in CPython3 standard library, so was
deemed worthy to implement. The method has subtle semantic differences
from just .split("\n"). It is also defined as working for any end-of-line
combination, but this is currently not implemented - it works only with
LF line-endings (which should be OK for text strings on any platforms,
but not OK for bytes).
2015-04-04 00:09:48 +03:00
Damien George 567184e21e py: Allow configurable object representation, with 2 different options. 2015-04-03 14:11:13 +01:00
Paul Sokolovsky 7f1c98177b vm: Support strict stackless mode, with proper exception reporting.
I.e. in this mode, C stack will never be used to call a Python function,
but if there's no free heap for a call, it will be reported as
RuntimeError (as expected), not MemoryError.
2015-04-03 00:26:47 +03:00
Paul Sokolovsky 2039757b85 vm: Initial support for calling bytecode functions w/o C stack ("stackless"). 2015-04-03 00:03:07 +03:00
stijn 28fa84b445 py: Add optional support for descriptors' __get__ and __set__ methods.
Disabled by default.  Enabled on unix and windows ports.
2015-03-26 23:55:14 +00:00
stijn 3cc17c69ff py: Allow retrieving a function's __name__.
Disabled by default.  Enabled on unix and stmhal ports.
2015-03-20 23:13:32 +00:00
Paul Sokolovsky 0ef01d0a75 py: Implement core of OrderedDict type.
Given that there's already support for "fixed table" maps, which are
essentially ordered maps, the implementation of OrderedDict just extends
"fixed table" maps by adding an "is ordered" flag and add/remove
operations, and reuses 95% of objdict code, just making methods tolerant
to both dict and OrderedDict.

Some things are missing so far, like CPython-compatible repr and comparison.

OrderedDict is Disabled by default; enabled on unix and stmhal ports.
2015-03-20 17:26:10 +00:00
Damien George 42e0c59308 py: Add MICROPY_COMP_{DOUBLE,TRIPLE}_TUPLE_ASSIGN config options.
These allow to fine-tune the compiler to select whether it optimises
tuple assignments of the form a, b = c, d and a, b, c = d, e, f.
Sensible defaults are provided.
2015-03-14 13:11:35 +00:00
Peter D. Gray b2a237d337 py: Add support for start/stop/step attributes of builtin range object. 2015-03-11 20:02:06 +00:00
Damien George d891452a73 py: Add MICROPY_MALLOC_USES_ALLOCATED_SIZE to allow simpler malloc API. 2015-03-03 21:23:13 +00:00
Paul Sokolovsky cefcbb22b2 objarray: Implement array slice assignment.
This is rarely used feature which takes enough code to implement, so is
controlled by MICROPY_PY_ARRAY_SLICE_ASSIGN config setting, default off.
But otherwise it may be useful, as allows to update arbitrary-sized data
buffers in-place.

Slice is yet to implement, and actually, slice assignment implemented in
such a way that RHS of assignment should be array of the exact same item
typecode as LHS. CPython has it more relaxed, where RHS can be any sequence
of compatible types (e.g. it's possible to assign list of int's to a
bytearray slice).

Overall, when all "slice write" features are implemented, it may cost ~1KB
of code.
2015-02-27 22:17:15 +02:00
nhtshot 5d323defe4 py: Update parse.c&mpconfig.h to reflect rename of mp_lexer_show_token.
This function is only used when DEBUG_PRINTERS and USE_RULE_NAME are
enabled.
2015-02-23 21:36:05 +00:00
Damien George 5cbeacebdb py: Make math special functions configurable and disabled by default.
The implementation of these functions is very large (order 4k) and they
are rarely used, so we don't enable them by default.

They are however enabled in stmhal and unix, since we have the room.
2015-02-22 14:48:18 +00:00
Damien George 28631537bd py: Add MICROPY_OBJ_BASE_ALIGNMENT to help with 16-bit ports. 2015-02-08 13:42:00 +00:00
Paul Sokolovsky 98c4bc3fac py: Add MICROPY_PY_ALL_SPECIAL_METHODS and __iadd__ special method under it. 2015-01-31 00:35:56 +02:00
Paul Sokolovsky 640e0b221e py: Implement very simple frozen modules support.
Only modules (not packages) supported now. Source modules can be converted
to frozen module structures using tools/make-frozen.py script.
2015-01-20 11:52:12 +02:00
Paul Sokolovsky 87bc8e2b3d pyexec: Add event-driven variant pyexec_friendly_repl().
pyexec_friendly_repl_process_char() and friends, useful for ports which
integrate into existing cooperative multitasking system.

Unlike readline() refactor before, this was implemented in less formal,
trial&error process, minor functionality regressions are still known
(like soft&hard reset support). So, original loop-based pyexec_friendly_repl()
is left intact, specific implementation selectable by config setting.
2015-01-16 01:30:42 +02:00
Damien George 2127e9a844 py, unix: Trace root pointers with native emitter under unix port.
Native code has GC-heap pointers in it so it must be scanned.  But on
unix port memory for native functions is mmap'd, and so it must have
explicit code to scan it for root pointers.
2015-01-14 00:11:09 +00:00
Damien George 95836f8439 py: Add MICROPY_QSTR_BYTES_IN_LEN config option, defaulting to 1.
This new config option sets how many fixed-number-of-bytes to use to
store the length of each qstr.  Previously this was hard coded to 2,
but, as per issue #1056, this is considered overkill since no-one
needs identifiers longer than 255 bytes.

With this patch the number of bytes for the length is configurable, and
defaults to 1 byte.  The configuration option filters through to the
makeqstrdata.py script.

Code size savings going from 2 to 1 byte:
- unix x64 down by 592 bytes
- stmhal down by 1148 bytes
- bare-arm down by 284 bytes

Also has RAM savings, and will be slightly more efficient in execution.
2015-01-11 22:27:30 +00:00
Damien George ddd1e18801 py: Add config option MICROPY_COMP_MODULE_CONST for module consts.
Compiler optimises lookup of module.CONST when enabled (an existing
feature).  Disabled by default; enabled for unix, windows, stmhal.
Costs about 100 bytes ROM on stmhal.
2015-01-10 14:07:24 +00:00