1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
#pragma once
namespace nall {
auto string::read(string_view 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(string_view 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 -> uint {
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(string_view 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;
}
template<typename T> auto fromInteger(char* result, T value) -> char* {
bool negative = value < 0;
if(!negative) value = -value; //negate positive integers to support eg INT_MIN
char buffer[1 + sizeof(T) * 3];
uint size = 0;
do {
int n = value % 10; //-0 to -9
buffer[size++] = '0' - n; //'0' to '9'
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;
}
template<typename T> auto fromNatural(char* result, T value) -> char* {
char buffer[1 + sizeof(T) * 3];
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.
template<typename T> auto fromReal(char* result, T 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", (long double)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;
}
}
|
