From 7f9d1d6ab923096582622b700bedb6a571518eac Mon Sep 17 00:00:00 2001 From: Damien George Date: Thu, 9 Apr 2015 23:56:15 +0100 Subject: 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. --- py/misc.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'py/misc.h') diff --git a/py/misc.h b/py/misc.h index f920d52a1..2c00b6880 100644 --- a/py/misc.h +++ b/py/misc.h @@ -147,6 +147,8 @@ typedef struct _vstr_t { void vstr_init(vstr_t *vstr, size_t alloc); void vstr_init_len(vstr_t *vstr, size_t len); void vstr_init_fixed_buf(vstr_t *vstr, size_t alloc, char *buf); +struct _mp_print_t; +void vstr_init_print(vstr_t *vstr, size_t alloc, struct _mp_print_t *print); void vstr_clear(vstr_t *vstr); vstr_t *vstr_new(void); vstr_t *vstr_new_size(size_t alloc); -- cgit v1.2.3