Commit Graph

14 Commits

Author SHA1 Message Date
Damien George 354d15a964 Implement fixed buffer vstrs; use them for import path. 2014-02-06 21:11:19 +00:00
Damien George e09ffa1400 Search paths properly on import and execute __init__.py if it exists. 2014-02-05 23:57:48 +00:00
Paul Sokolovsky e11b17c25f Implement support for sys.path when loading modules.
sys.path is not initialized by rt_init(), that's left for platform-specific
startup code. (For example, bare metal port may have some hardcoded defaults,
and let user change sys.path directly; while port for OS with environment
feature can take path from environment). If it's not explicitly initialized,
modules will be imported only from a current directory.
2014-02-05 01:40:41 +02:00
Paul Sokolovsky 1d938c9503 Expose __import__() function. 2014-02-04 00:47:06 +02:00
Damien George b829b5caec Implement mp_parse_node_free; print properly repr(string). 2014-01-25 13:51:19 +00:00
Damien George 5fa93b6755 Second stage of qstr revamp: uPy str object can be qstr or not. 2014-01-22 14:35:10 +00:00
Damien George 55baff4c9b Revamp qstrs: they now include length and hash.
Can now have null bytes in strings.  Can define ROM qstrs per port using
qstrdefsport.h
2014-01-21 21:40:13 +00:00
Paul Sokolovsky d720ab5236 Implement modules as singletons Python semantics.
In Python, importing module several times returns same underlying module
object. This also fixes import statement handling for builtin modules.

There're still issues:
1. CPython exposes set of loaded modules as sys.modules, we may want to
do that either.
2. Builtin modules are implicitly imported, which is not really correct.
We should separate registering a (builtin) module and importing a module.
CPython keeps builtin module names in sys.builtin_module_names .
2014-01-20 00:38:39 +02:00
Damien George 08335004cf Add source file name and line number to error messages.
Byte code has a map from byte-code offset to source-code line number,
used to give better error messages.
2014-01-18 23:24:36 +00:00
Damien George 9528cd66d7 Convert parse errors to exceptions.
Parser no longer prints an error, but instead returns an exception ID
and message.
2014-01-15 21:23:31 +00:00
Damien George 2300537c79 Cleanup built-ins, and fix some compiler warnings/errors. 2014-01-13 19:39:01 +00:00
Damien George eb7bfcb286 Split qstr into pools, and put initial pool in ROM.
Qstr's are now split into a linked-list of qstr pools.  This has 2
benefits: the first pool can be in ROM (huge benefit, since we no longer
use RAM for the core qstrs), and subsequent pools use m_new for the next
pool instead of m_renew (thus avoiding a huge single table for all the
qstrs).

Still would be better to use a hash table, but this scheme takes us part
of the way (eventually convert the pools to hash tables).

Also fixed bug with import.

Also improved the way the module code is referenced (not magic number 1
anymore).
2014-01-04 15:57:35 +00:00
Damien George 1fb031744f Change mp_compile so that it returns a function object for the module. 2014-01-03 14:22:03 +00:00
Damien George 66028ab6dc Basic implementation of import.
import works for simple cases.  Still work to do on finding the right
script, and setting globals/locals correctly when running an imported
function.
2014-01-03 14:03:48 +00:00