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py: Reduce size of mp_printf by eliminating unnecessary code.

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Saves around 120 bytes on Thumb2 archs.
This commit is contained in:
Damien George 2015-05-28 13:54:56 +00:00
parent 78744c4f7a
commit 2cae0f6290
2 changed files with 12 additions and 3 deletions
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14
py/mpprint.c
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@ -120,9 +120,13 @@ int mp_print_strn(const mp_print_t *print, const char *str, mp_uint_t len, int f
// We can use 16 characters for 32-bit and 32 characters for 64-bit
#define INT_BUF_SIZE (sizeof(mp_int_t) * 4)
// This function is used by stmhal port to implement printf.
// Our mp_vprintf function below does not support the '#' format modifier to
// print the prefix of a non-base-10 number, so we don't need code for this.
#define SUPPORT_INT_BASE_PREFIX (0)
// This function is used exclusively by mp_vprintf to format ints.
// It needs to be a separate function to mp_print_mp_int, since converting to a mp_int looses the MSB.
int mp_print_int(const mp_print_t *print, mp_uint_t x, int sgn, int base, int base_char, int flags, char fill, int width) {
STATIC int mp_print_int(const mp_print_t *print, mp_uint_t x, int sgn, int base, int base_char, int flags, char fill, int width) {
char sign = 0;
if (sgn) {
if ((mp_int_t)x < 0) {
@ -153,6 +157,7 @@ int mp_print_int(const mp_print_t *print, mp_uint_t x, int sgn, int base, int ba
} while (b > buf && x != 0);
}
#if SUPPORT_INT_BASE_PREFIX
char prefix_char = '\0';
if (flags & PF_FLAG_SHOW_PREFIX) {
@ -164,6 +169,7 @@ int mp_print_int(const mp_print_t *print, mp_uint_t x, int sgn, int base, int ba
prefix_char = base_char + 'x' - 'a';
}
}
#endif
int len = 0;
if (flags & PF_FLAG_PAD_AFTER_SIGN) {
@ -171,16 +177,20 @@ int mp_print_int(const mp_print_t *print, mp_uint_t x, int sgn, int base, int ba
len += mp_print_strn(print, &sign, 1, flags, fill, 1);
width--;
}
#if SUPPORT_INT_BASE_PREFIX
if (prefix_char) {
len += mp_print_strn(print, "0", 1, flags, fill, 1);
len += mp_print_strn(print, &prefix_char, 1, flags, fill, 1);
width -= 2;
}
#endif
} else {
#if SUPPORT_INT_BASE_PREFIX
if (prefix_char && b > &buf[1]) {
*(--b) = prefix_char;
*(--b) = '0';
}
#endif
if (sign && b > buf) {
*(--b) = sign;
}

1
py/mpprint.h
View File

@ -57,7 +57,6 @@ extern const mp_print_t mp_sys_stdout_print;
int mp_print_str(const mp_print_t *print, const char *str);
int mp_print_strn(const mp_print_t *print, const char *str, mp_uint_t len, int flags, char fill, int width);
int mp_print_int(const mp_print_t *print, mp_uint_t x, int sgn, int base, int base_char, int flags, char fill, int width);
#if MICROPY_PY_BUILTINS_FLOAT
int mp_print_float(const mp_print_t *print, mp_float_t f, char fmt, int flags, char fill, int width, int prec);
#endif