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msvcrt: Reimplement %a printf format handling. 

Signed-off-by: Piotr Caban <piotr@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Piotr Caban 2020-06-08 17:20:51 +02:00 committed by Alexandre Julliard
parent c638730b6d
commit 111e4221ac
1 changed files with 116 additions and 0 deletions
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116
dlls/msvcrt/printf.h
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@ -405,6 +405,120 @@ static inline int FUNC_NAME(pf_output_special_fp)(FUNC_NAME(puts_clbk) pf_puts,
return len;
}
static inline int FUNC_NAME(pf_output_hex_fp)(FUNC_NAME(puts_clbk) pf_puts, void *puts_ctx,
double v, FUNC_NAME(pf_flags) *flags, MSVCRT__locale_t locale)
{
#define EXP_BITS 11
#define MANT_BITS 53
const APICHAR digits[2][16] = {
{ '0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f' },
{ '0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F' }
};
APICHAR pfx[16], sfx[8], *p;
ULONGLONG mant;
int len = 0, sfx_len = 0, r, exp;
mant = (*(ULONGLONG*)&v) << 1;
exp = (mant >> MANT_BITS);
exp -= (1 << (EXP_BITS - 1)) - 1;
mant = (mant << EXP_BITS) >> (EXP_BITS+1);
p = pfx;
if(flags->PadZero) {
if(flags->Sign) *p++ = flags->Sign;
*p++ = '0';
*p++ = (flags->Format=='a' ? 'x' : 'X');
r = pf_puts(puts_ctx, p-pfx, pfx);
if(r < 0) return r;
len += r;
flags->FieldLength -= p-pfx;
flags->Sign = 0;
p = pfx;
}else {
*p++ = '0';
*p++ = (flags->Format=='a' ? 'x' : 'X');
}
if(exp == -(1 << (EXP_BITS-1))+1) {
if(!mant) exp = 0;
else exp++;
*p++ = '0';
}else {
*p++ = '1';
}
*p++ = *(locale ? locale->locinfo : get_locinfo())->lconv->decimal_point;
for(r=MANT_BITS/4-1; r>=0; r--) {
p[r] = digits[flags->Format == 'A'][mant & 15];
mant >>= 4;
}
if(!flags->Precision) {
if(p[0] > '8') p[-2]++;
if(!flags->Alternate) p--;
}else if(flags->Precision>0 && flags->Precision<MANT_BITS/4) {
BOOL round_up = (p[flags->Precision] > '8');
for(r=flags->Precision-1; r>=0 && round_up; r--) {
round_up = FALSE;
if(p[r]=='f' || p[r]=='F') {
p[r] = '0';
round_up = TRUE;
}else if(p[r] == '9') {
p[r] = (flags->Format == 'a' ? 'a' : 'A');
}else {
p[r]++;
}
}
if(round_up) p[-2]++;
p += flags->Precision;
}else {
p += MANT_BITS/4;
if(flags->Precision > MANT_BITS/4) sfx_len += flags->Precision - MANT_BITS/4;
}
*p = 0;
p = sfx;
*p++ = (flags->Format == 'a' ? 'p' : 'P');
if(exp < 0) {
*p++ = '-';
exp = -exp;
}else {
*p++ = '+';
}
for(r=3; r>=0; r--) {
p[r] = exp%10 + '0';
exp /= 10;
if(!exp) break;
}
for(exp=0; exp<4-r; exp++)
p[exp] = p[exp+r];
p += exp;
*p = 0;
sfx_len += p - sfx;
flags->FieldLength -= sfx_len;
flags->Precision = -1;
#ifdef PRINTF_WIDE
r = FUNC_NAME(pf_output_format_wstr)(pf_puts, puts_ctx, pfx, -1, flags, locale);
#else
r = FUNC_NAME(pf_output_format_str)(pf_puts, puts_ctx, pfx, -1, flags, locale);
#endif
if(r < 0) return r;
len += r;
flags->FieldLength = sfx_len;
flags->PadZero = '0';
flags->Sign = 0;
#ifdef PRINTF_WIDE
r = FUNC_NAME(pf_output_format_wstr)(pf_puts, puts_ctx, sfx, -1, flags, locale);
#else
r = FUNC_NAME(pf_output_format_str)(pf_puts, puts_ctx, sfx, -1, flags, locale);
#endif
if(r < 0) return r;
len += r;
return len;
}
static inline void FUNC_NAME(pf_rebuild_format_string)(char *p, FUNC_NAME(pf_flags) *flags)
{
*p++ = '%';
@ -749,6 +863,8 @@ int FUNC_NAME(pf_printf)(FUNC_NAME(puts_clbk) pf_puts, void *puts_ctx, const API
if(isinf(val) || isnan(val))
i = FUNC_NAME(pf_output_special_fp)(pf_puts, puts_ctx, val, &flags,
locale, legacy_msvcrt_compat, three_digit_exp);
else if(flags.Format=='a' || flags.Format=='A')
i = FUNC_NAME(pf_output_hex_fp)(pf_puts, puts_ctx, val, &flags, locale);
else {
if(flags.Format=='f' || flags.Format=='F') {
if(val<10.0)