diff options
| author | Martmists <mail@martmists.com> | 2020-04-26 23:03:59 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-04-26 23:03:59 +0200 |
| commit | e13067a7c4c852559fb2470796b4ac180ffeb0b5 (patch) | |
| tree | c3ea46b3c8172061b96be009abd27688120fae24 /arm9/src/string_util.c | |
| parent | f19fa5a0c71fa2b80b7b6755ce51c7080f769ffd (diff) | |
| parent | af797ab9c5df085597f773e4bcf91ef96f38e81d (diff) | |
Merge pull request #30 from red031000/os_lib
merge master (I can't believe I have to make a PR for this, this is stupid)
Diffstat (limited to 'arm9/src/string_util.c')
| -rw-r--r-- | arm9/src/string_util.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/arm9/src/string_util.c b/arm9/src/string_util.c new file mode 100644 index 00000000..8f9c96ff --- /dev/null +++ b/arm9/src/string_util.c @@ -0,0 +1,153 @@ +#include "global.h"
+
+u16 gDigitTable[] = {
+ 0xA2,
+ 0xA3,
+ 0xA4,
+ 0xA5,
+ 0xA6,
+ 0xA7,
+ 0xA8,
+ 0xA9,
+ 0xAA,
+ 0xAB,
+ 0xAC,
+ 0xAD,
+ 0xAE,
+ 0xAF,
+ 0xB0,
+ 0xB1
+};
+
+s32 gPowersOfTen[] = {
+ 1,
+ 10,
+ 100,
+ 1000,
+ 10000,
+ 100000,
+ 1000000,
+ 10000000,
+ 100000000,
+ 1000000000,
+};
+
+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 - 1]; 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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