#include <cassert>
#include <cstdio>
#include <cstring>
#include <functional>
#include <string>
Go to the source code of this file.
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void | chomp_string (char *str) |
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void | SkipNewline (FILE *file) |
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template<typename T > |
void | Swap (T *p1, T *p2) |
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int | RoundUp (int n, int block_size) |
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template<typename T > |
T | ClipToRange (const T &x, const T &lower_bound, const T &upper_bound) |
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template<typename T1 , typename T2 > |
void | UpdateRange (const T1 &x, T2 *lower_bound, T2 *upper_bound) |
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template<typename T1 , typename T2 > |
void | UpdateRange (const T1 &x_lo, const T1 &x_hi, T2 *lower_bound, T2 *upper_bound) |
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template<typename T > |
void | IntersectRange (const T &lower1, const T &upper1, T *lower2, T *upper2) |
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int | Modulo (int a, int b) |
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int | DivRounded (int a, int b) |
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int | IntCastRounded (double x) |
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int | IntCastRounded (float x) |
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void | ReverseN (void *ptr, int num_bytes) |
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void | Reverse16 (void *ptr) |
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void | Reverse32 (void *ptr) |
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void | Reverse64 (void *ptr) |
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◆ chomp_string()
void chomp_string |
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char * |
str | ) |
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Definition at line 77 of file helpers.h.
77 {
78 int last_index = static_cast<int>(strlen(str)) - 1;
79 while (last_index >= 0 &&
80 (str[last_index] == '\n' || str[last_index] == '\r')) {
81 str[last_index--] = '\0';
82 }
83}
◆ ClipToRange()
template<typename T >
T ClipToRange |
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const T & |
x, |
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const T & |
lower_bound, |
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const T & |
upper_bound |
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Definition at line 108 of file helpers.h.
108 {
109 if (x < lower_bound) {
110 return lower_bound;
111 }
112 if (x > upper_bound) {
113 return upper_bound;
114 }
115 return x;
116}
◆ DivRounded()
int DivRounded |
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int |
a, |
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int |
b |
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Definition at line 167 of file helpers.h.
167 {
168 if (b < 0) {
170 }
171 return a >= 0 ? (a + b / 2) / b : (a - b / 2) / b;
172}
int DivRounded(int a, int b)
◆ IntCastRounded() [1/2]
int IntCastRounded |
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double |
x | ) |
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inline |
Definition at line 175 of file helpers.h.
175 {
176 return x >= 0.0 ? static_cast<int>(x + 0.5) : -static_cast<int>(-x + 0.5);
177}
◆ IntCastRounded() [2/2]
int IntCastRounded |
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float |
x | ) |
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inline |
Definition at line 180 of file helpers.h.
180 {
181 return x >= 0.0F ? static_cast<int>(x + 0.5F) : -static_cast<int>(-x + 0.5F);
182}
◆ IntersectRange()
template<typename T >
void IntersectRange |
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const T & |
lower1, |
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const T & |
upper1, |
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T * |
lower2, |
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T * |
upper2 |
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Definition at line 145 of file helpers.h.
146 {
147 if (lower1 > *lower2) {
148 *lower2 = lower1;
149 }
150 if (upper1 < *upper2) {
151 *upper2 = upper1;
152 }
153}
◆ Modulo()
int Modulo |
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int |
a, |
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int |
b |
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Definition at line 158 of file helpers.h.
158 {
159 return (a % b + b) % b;
160}
◆ Reverse16()
void Reverse16 |
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void * |
ptr | ) |
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inline |
Definition at line 197 of file helpers.h.
197 {
199}
void ReverseN(void *ptr, int num_bytes)
◆ Reverse32()
void Reverse32 |
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void * |
ptr | ) |
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◆ Reverse64()
void Reverse64 |
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void * |
ptr | ) |
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◆ ReverseN()
void ReverseN |
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void * |
ptr, |
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int |
num_bytes |
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inline |
Definition at line 185 of file helpers.h.
185 {
186 assert(num_bytes == 1 || num_bytes == 2 || num_bytes == 4 || num_bytes == 8);
187 char* cptr = static_cast<char*>(ptr);
188 int halfsize = num_bytes / 2;
189 for (int i = 0; i < halfsize; ++i) {
190 char tmp = cptr[i];
191 cptr[i] = cptr[num_bytes - 1 - i];
192 cptr[num_bytes - 1 - i] = tmp;
193 }
194}
◆ RoundUp()
int RoundUp |
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int |
n, |
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int |
block_size |
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inline |
Definition at line 102 of file helpers.h.
102 {
103 return block_size * ((n + block_size - 1) / block_size);
104}
◆ SkipNewline()
void SkipNewline |
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FILE * |
file | ) |
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inline |
Definition at line 86 of file helpers.h.
86 {
87 if (fgetc(file) != '\n') {
88 fseek(file, -1, SEEK_CUR);
89 }
90}
◆ Swap()
template<typename T >
void Swap |
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T * |
p1, |
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T * |
p2 |
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inline |
Definition at line 95 of file helpers.h.
95 {
96 T tmp(*p2);
97 *p2 = *p1;
98 *p1 = tmp;
99}
◆ UpdateRange() [1/2]
template<typename T1 , typename T2 >
void UpdateRange |
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const T1 & |
x, |
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T2 * |
lower_bound, |
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T2 * |
upper_bound |
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inline |
Definition at line 120 of file helpers.h.
120 {
121 if (x < *lower_bound) {
122 *lower_bound = x;
123 }
124 if (x > *upper_bound) {
125 *upper_bound = x;
126 }
127}
◆ UpdateRange() [2/2]
template<typename T1 , typename T2 >
void UpdateRange |
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const T1 & |
x_lo, |
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const T1 & |
x_hi, |
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T2 * |
lower_bound, |
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T2 * |
upper_bound |
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inline |
Definition at line 131 of file helpers.h.
132 {
133 if (x_lo < *lower_bound) {
134 *lower_bound = x_lo;
135 }
136 if (x_hi > *upper_bound) {
137 *upper_bound = x_hi;
138 }
139}