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#include "nitro.h"
extern u32 gPowersOfTen[]; // at 0x20ECB24
extern u16 gDigitTable[]; // at 0x20ECB08
static const u16 EOS = 0xFFFF;
void StringCopy(u16 *dest, const u16 *src)
{
u16 c = *src;
while (c != EOS) {
src++;
*dest = c;
c = *src;
dest++;
}
*dest = EOS;
}
u16 *StringCopyN(u16 *dest, const u16 *src, u32 num)
{
u32 copied = 0;
if (num > copied) {
u16 *p = dest;
do {
u16 c = *src;
copied++;
src++;
*p = c;
p++;
} while (num > copied);
}
return dest + num;
}
u32 StringLength(const u16 *s)
{
u16 c = *s;
u32 len = 0;
while (c != EOS) {
s++;
c = *s;
len++;
}
return len;
}
BOOL StringNotEqual(const u16 *s1, const u16 *s2)
{
for (; *s1 == *s2; s1++, s2++) {
if (*s1 == EOS)
return FALSE;
}
return TRUE;
}
BOOL StringNotEqualN(const u16 *s1, const u16 *s2, u32 num)
{
u16 c1, c2;
c2 = *s2;
c1 = *s1;
while (c1 == c2) {
if (num == 0) {
return FALSE;
}
if (*s1 == EOS && *s2 == EOS) {
return FALSE;
}
s1++;
s2++;
c2 = *s2;
c1 = *s1;
num--;
}
return TRUE;
}
u16 *StringFill(u16 *dest, u16 value, u32 num)
{
u32 copied = 0;
if (num > copied) {
u16 *p = dest;
do {
copied++;
*p = value;
p++;
} while (copied < num);
}
return dest + copied;
}
u16 *StringFillEOS(u16 *dest, u32 num)
{
return StringFill(dest, EOS, num);
}
enum PrintingMode {
NORMAL,
PAD_SPACE,
PAD_ZEROES
};
const u16 NON_DIGIT = 0xE2;
u16 *ConvertUIntToDecimalString(u16 *dest, u32 value, enum PrintingMode mode, u32 n)
{
for (u32 x = gPowersOfTen[n]; x != 0; x = x / 10) {
u16 res = value / x;
value = value - x * res;
if (mode == PAD_ZEROES) {
*dest = res >= 10 ? NON_DIGIT : gDigitTable[res];
dest++;
} else if (res != 0 || x == 1) {
mode = PAD_ZEROES;
*dest = res >= 10 ? NON_DIGIT : gDigitTable[res];
dest++;
} else if (mode == PAD_SPACE) {
*dest = 1;
dest++;
}
}
*dest = EOS;
return dest;
}
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