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#pragma once
namespace nall {
auto string::read(rstring filename) -> string {
#if !defined(_WIN32)
FILE* fp = fopen(filename, "rb");
#else
FILE* fp = _wfopen(utf16_t(filename), L"rb");
#endif
string result;
if(!fp) return result;
fseek(fp, 0, SEEK_END);
int filesize = ftell(fp);
if(filesize < 0) return fclose(fp), result;
rewind(fp);
result.resize(filesize);
auto unused = fread(result.get(), 1, filesize, fp);
return fclose(fp), result;
}
auto string::repeat(rstring pattern, uint times) -> string {
string result;
while(times--) result.append(pattern.data());
return result;
}
auto string::fill(char fill) -> string& {
memory::fill(get(), size(), fill);
return *this;
}
auto string::hash() const -> unsigned {
const char* p = data();
uint length = size();
uint result = 5381;
while(length--) result = (result << 5) + result + *p++;
return result;
}
auto string::remove(uint offset, uint length) -> string& {
char* p = get();
length = min(length, size());
memory::move(p + offset, p + offset + length, size() - length);
return resize(size() - length);
}
auto string::reverse() -> string& {
char* p = get();
uint length = size();
uint pivot = length >> 1;
for(int x = 0, y = length - 1; x < pivot && y >= 0; x++, y--) std::swap(p[x], p[y]);
return *this;
}
//+length => insert/delete from start (right justify)
//-length => insert/delete from end (left justify)
auto string::size(int length, char fill) -> string& {
uint size = this->size();
if(size == length) return *this;
bool right = length >= 0;
length = abs(length);
if(size < length) { //expand
resize(length);
char* p = get();
uint displacement = length - size;
if(right) memory::move(p + displacement, p, size);
else p += size;
while(displacement--) *p++ = fill;
} else { //shrink
char* p = get();
uint displacement = size - length;
if(right) memory::move(p, p + displacement, length);
resize(length);
}
return *this;
}
auto slice(rstring self, int offset, int length) -> string {
string result;
if(offset < self.size()) {
if(length < 0) length = self.size() - offset;
result.resize(length);
memory::copy(result.get(), self.data() + offset, length);
}
return result;
}
auto integer(char* result, intmax value) -> char* {
bool negative = value < 0;
if(negative) value = -value;
char buffer[64];
uint size = 0;
do {
uint n = value % 10;
buffer[size++] = '0' + n;
value /= 10;
} while(value);
if(negative) buffer[size++] = '-';
for(int x = size - 1, y = 0; x >= 0 && y < size; x--, y++) result[x] = buffer[y];
result[size] = 0;
return result;
}
auto natural(char* result, uintmax value) -> char* {
char buffer[64];
uint size = 0;
do {
uint n = value % 10;
buffer[size++] = '0' + n;
value /= 10;
} while(value);
for(int x = size - 1, y = 0; x >= 0 && y < size; x--, y++) result[x] = buffer[y];
result[size] = 0;
return result;
}
//using sprintf is certainly not the most ideal method to convert
//a double to a string ... but attempting to parse a double by
//hand, digit-by-digit, results in subtle rounding errors.
auto real(char* result, long double value) -> uint {
char buffer[256];
#ifdef _WIN32
//Windows C-runtime does not support long double via sprintf()
sprintf(buffer, "%f", (double)value);
#else
sprintf(buffer, "%Lf", value);
#endif
//remove excess 0's in fraction (2.500000 -> 2.5)
for(char* p = buffer; *p; p++) {
if(*p == '.') {
char* p = buffer + strlen(buffer) - 1;
while(*p == '0') {
if(*(p - 1) != '.') *p = 0; //... but not for eg 1.0 -> 1.
p--;
}
break;
}
}
uint length = strlen(buffer);
if(result) strcpy(result, buffer);
return length + 1;
}
}
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