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optimize Memory::IsValidNullTerminatedString

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This commit is contained in:
Katharine Chui 2024-05-03 19:42:50 +08:00
parent 0506adb65c
commit 47c7fab928
1 changed files with 26 additions and 24 deletions
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50
Core/MemMap.h
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@ -310,35 +310,37 @@ inline bool IsValidAddress(const u32 address) {
}
}
inline bool IsValidNullTerminatedString(const u32 address) {
int i = 0;
while (true) {
u32 char_at = address + i;
if (!IsValidAddress(char_at)) {
return false;
}
const char *c = GetCharPointerUnchecked(char_at);
if (*c == '\0') {
return true;
}
i++;
inline u32 MaxSizeAtAddress(const u32 address){
if ((address & 0x3E000000) == 0x08000000) {
return 0x08000000 + g_MemorySize - (address & 0x3FFFFFFF);
} else if ((address & 0x3F800000) == 0x04000000) {
return 0x04800000 - (address & 0x3FFFFFFF);
} else if ((address & 0xBFFFC000) == 0x00010000) {
return 0x00014000 - (address & 0x3FFFFFFF);
} else if ((address & 0x3F000000) >= 0x08000000 && (address & 0x3F000000) < 0x08000000 + g_MemorySize) {
return 0x08000000 + g_MemorySize - (address & 0x3FFFFFFF);
} else {
return 0;
}
}
inline u32 ValidSize(const u32 address, const u32 requested_size) {
u32 max_size;
if ((address & 0x3E000000) == 0x08000000) {
max_size = 0x08000000 + g_MemorySize - (address & 0x3FFFFFFF);
} else if ((address & 0x3F800000) == 0x04000000) {
max_size = 0x04800000 - (address & 0x3FFFFFFF);
} else if ((address & 0xBFFFC000) == 0x00010000) {
max_size = 0x00014000 - (address & 0x3FFFFFFF);
} else if ((address & 0x3F000000) >= 0x08000000 && (address & 0x3F000000) < 0x08000000 + g_MemorySize) {
max_size = 0x08000000 + g_MemorySize - (address & 0x3FFFFFFF);
} else {
max_size = 0;
inline bool IsValidNullTerminatedString(const u32 address) {
u32 max_size = MaxSizeAtAddress(address);
if (max_size == 0) {
return false;
}
const char *c = GetCharPointerUnchecked(address);
for (u32 i = 0; i < max_size; i++) {
if (c[i] == '\0') {
return true;
}
}
return false;
}
inline u32 ValidSize(const u32 address, const u32 requested_size) {
u32 max_size = MaxSizeAtAddress(address);
if (requested_size > max_size) {
return max_size;
}