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SDL_vsnprintf: implement precision for the integral value printers.

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This commit is contained in:
Ozkan Sezer 2018-09-27 00:32:15 +03:00
parent 55b24b93b4
commit d2131ac165
1 changed files with 27 additions and 0 deletions
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27
src/stdlib/SDL_string.c
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@ -1413,12 +1413,36 @@ SDL_PrintString(char *text, size_t maxlen, SDL_FormatInfo *info, const char *str
return length;
}
static void
SDL_IntPrecisionAdjust(char *num, size_t maxlen, SDL_FormatInfo *info)
{/* left-pad num with zeroes, if needed. */
size_t sz, pad, i;
if (!info || info->precision < 0)
return;
if (*num == '-')
++num;
sz = SDL_strlen(num);
if (sz < (size_t)info->precision) {
pad = (size_t)info->precision - sz;
if (pad + sz + 1 <= maxlen) { /* otherwise ignore the precision */
SDL_memmove(num + pad, num, sz + 1);
for(i = 0; i < pad; ++i) {
num[i] = '0';
}
}
}
info->precision = -1;/* so that SDL_PrintString() doesn't make a mess. */
}
static size_t
SDL_PrintLong(char *text, size_t maxlen, SDL_FormatInfo *info, long value)
{
char num[130];
SDL_ltoa(value, num, info ? info->radix : 10);
SDL_IntPrecisionAdjust(num, maxlen, info);
return SDL_PrintString(text, maxlen, info, num);
}
@ -1428,6 +1452,7 @@ SDL_PrintUnsignedLong(char *text, size_t maxlen, SDL_FormatInfo *info, unsigned
char num[130];
SDL_ultoa(value, num, info ? info->radix : 10);
SDL_IntPrecisionAdjust(num, maxlen, info);
return SDL_PrintString(text, maxlen, info, num);
}
@ -1437,6 +1462,7 @@ SDL_PrintLongLong(char *text, size_t maxlen, SDL_FormatInfo *info, Sint64 value)
char num[130];
SDL_lltoa(value, num, info ? info->radix : 10);
SDL_IntPrecisionAdjust(num, maxlen, info);
return SDL_PrintString(text, maxlen, info, num);
}
@ -1446,6 +1472,7 @@ SDL_PrintUnsignedLongLong(char *text, size_t maxlen, SDL_FormatInfo *info, Uint6
char num[130];
SDL_ulltoa(value, num, info ? info->radix : 10);
SDL_IntPrecisionAdjust(num, maxlen, info);
return SDL_PrintString(text, maxlen, info, num);
}