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py: Overhaul and simplify printf/pfenv mechanism.

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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.
This commit is contained in:
Damien George
2015-04-09 23:56:15 +01:00
parent 56beb01724
commit 7f9d1d6ab9
91 changed files with 671 additions and 716 deletions
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33
py/objstrunicode.c
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@@ -33,7 +33,6 @@
#include "py/objlist.h"
#include "py/runtime0.h"
#include "py/runtime.h"
#include "py/pfenv.h"
#if MICROPY_PY_BUILTINS_STR_UNICODE
@@ -42,7 +41,7 @@ STATIC mp_obj_t mp_obj_new_str_iterator(mp_obj_t str);
/******************************************************************************/
/* str */
STATIC void uni_print_quoted(void (*print)(void *env, const char *fmt, ...), void *env, const byte *str_data, uint str_len) {
STATIC void uni_print_quoted(const mp_print_t *print, const byte *str_data, uint str_len) {
// this escapes characters, but it will be very slow to print (calling print many times)
bool has_single_quote = false;
bool has_double_quote = false;
@@ -57,47 +56,47 @@ STATIC void uni_print_quoted(void (*print)(void *env, const char *fmt, ...), voi
if (has_single_quote && !has_double_quote) {
quote_char = '"';
}
print(env, "%c", quote_char);
mp_printf(print, "%c", quote_char);
const byte *s = str_data, *top = str_data + str_len;
while (s < top) {
unichar ch;
ch = utf8_get_char(s);
s = utf8_next_char(s);
if (ch == quote_char) {
print(env, "\\%c", quote_char);
mp_printf(print, "\\%c", quote_char);
} else if (ch == '\\') {
print(env, "\\\\");
mp_print_str(print, "\\\\");
} else if (32 <= ch && ch <= 126) {
print(env, "%c", ch);
mp_printf(print, "%c", ch);
} else if (ch == '\n') {
print(env, "\\n");
mp_print_str(print, "\\n");
} else if (ch == '\r') {
print(env, "\\r");
mp_print_str(print, "\\r");
} else if (ch == '\t') {
print(env, "\\t");
mp_print_str(print, "\\t");
} else if (ch < 0x100) {
print(env, "\\x%02x", ch);
mp_printf(print, "\\x%02x", ch);
} else if (ch < 0x10000) {
print(env, "\\u%04x", ch);
mp_printf(print, "\\u%04x", ch);
} else {
print(env, "\\U%08x", ch);
mp_printf(print, "\\U%08x", ch);
}
}
print(env, "%c", quote_char);
mp_printf(print, "%c", quote_char);
}
STATIC void uni_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
STATIC void uni_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
GET_STR_DATA_LEN(self_in, str_data, str_len);
#if MICROPY_PY_UJSON
if (kind == PRINT_JSON) {
mp_str_print_json(print, env, str_data, str_len);
mp_str_print_json(print, str_data, str_len);
return;
}
#endif
if (kind == PRINT_STR) {
print(env, "%.*s", str_len, str_data);
mp_printf(print, "%.*s", str_len, str_data);
} else {
uni_print_quoted(print, env, str_data, str_len);
uni_print_quoted(print, str_data, str_len);
}
}