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stdlib: SDL_snprintf now adds decimal places for ("%f", 0.0).

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This patch was from @Markvy (thanks!).

Fixes #4795.
This commit is contained in:
Ryan C. Gordon 2021-11-07 12:26:39 -05:00 committed by Sam Lantinga
parent 2008f2a8a6
commit 3acb172531
1 changed files with 28 additions and 41 deletions
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69
src/stdlib/SDL_string.c
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@ -1636,51 +1636,38 @@ SDL_PrintFloat(char *text, size_t maxlen, SDL_FormatInfo *info, double arg)
{
size_t length = 0;
if (arg) {
/* This isn't especially accurate, but hey, it's easy. :) */
unsigned long value;
/* This isn't especially accurate, but hey, it's easy. :) */
unsigned long value;
if (arg < 0) {
if (length < maxlen) {
text[length] = '-';
}
++length;
arg = -arg;
} else if (info->force_sign) {
if (length < maxlen) {
text[length] = '+';
}
++length;
}
value = (unsigned long) arg;
length += SDL_PrintUnsignedLong(TEXT_AND_LEN_ARGS, NULL, value);
arg -= value;
if (info->precision < 0) {
info->precision = 6;
}
if (info->force_type || info->precision > 0) {
int mult = 10;
if (length < maxlen) {
text[length] = '.';
}
++length;
while (info->precision-- > 0) {
value = (unsigned long) (arg * mult);
length += SDL_PrintUnsignedLong(TEXT_AND_LEN_ARGS, NULL, value);
arg -= (double) value / mult;
mult *= 10;
}
}
} else {
if (arg < 0) {
if (length < maxlen) {
text[length] = '0';
text[length] = '-';
}
++length;
if (info->force_type) {
if (length < maxlen) {
text[length] = '.';
}
++length;
arg = -arg;
} else if (info->force_sign) {
if (length < maxlen) {
text[length] = '+';
}
++length;
}
value = (unsigned long) arg;
length += SDL_PrintUnsignedLong(TEXT_AND_LEN_ARGS, NULL, value);
arg -= value;
if (info->precision < 0) {
info->precision = 6;
}
if (info->force_type || info->precision > 0) {
int mult = 10;
if (length < maxlen) {
text[length] = '.';
}
++length;
while (info->precision-- > 0) {
value = (unsigned long) (arg * mult);
length += SDL_PrintUnsignedLong(TEXT_AND_LEN_ARGS, NULL, value);
arg -= (double) value / mult;
mult *= 10;
}
}