Tesseract  3.02
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helpers.h File Reference
#include <stdio.h>
#include <string.h>

Go to the source code of this file.

Functions

void chomp_string (char *str)
void SkipNewline (FILE *file)
int sort_floats (const void *arg1, const void *arg2)
int RoundUp (int n, int block_size)
template<typename T >
ClipToRange (const T &x, const T &lower_bound, const T &upper_bound)
template<typename T1 , typename T2 >
void UpdateRange (const T1 &x, T2 *lower_bound, T2 *upper_bound)
template<typename T1 , typename T2 >
void UpdateRange (const T1 &x_lo, const T1 &x_hi, T2 *lower_bound, T2 *upper_bound)
template<typename T >
void IntersectRange (const T &lower1, const T &upper1, T *lower2, T *upper2)
int Modulo (int a, int b)
int DivRounded (int a, int b)
int IntCastRounded (double x)
void ReverseN (void *ptr, int num_bytes)
void Reverse16 (void *ptr)
void Reverse32 (void *ptr)
void Reverse64 (void *ptr)

Function Documentation

void chomp_string ( char *  str)
inline

Definition at line 32 of file helpers.h.

{
int last_index = strlen(str) - 1;
while (last_index >= 0 &&
(str[last_index] == '\n' || str[last_index] == '\r')) {
str[last_index--] = '\0';
}
}
template<typename T >
T ClipToRange ( const T &  x,
const T &  lower_bound,
const T &  upper_bound 
)
inline

Definition at line 64 of file helpers.h.

{
if (x < lower_bound)
return lower_bound;
if (x > upper_bound)
return upper_bound;
return x;
}
int DivRounded ( int  a,
int  b 
)
inline

Definition at line 115 of file helpers.h.

{
if (b < 0) return -DivRounded(a, -b);
return a >= 0 ? (a + b / 2) / b : (a - b / 2) / b;
}
int IntCastRounded ( double  x)
inline

Definition at line 121 of file helpers.h.

{
return x >= 0.0 ? static_cast<int>(x + 0.5) : -static_cast<int>(-x + 0.5);
}
template<typename T >
void IntersectRange ( const T &  lower1,
const T &  upper1,
T *  lower2,
T *  upper2 
)
inline

Definition at line 95 of file helpers.h.

{
if (lower1 > *lower2)
*lower2 = lower1;
if (upper1 < *upper2)
*upper2 = upper1;
}
int Modulo ( int  a,
int  b 
)
inline

Definition at line 106 of file helpers.h.

{
return (a % b + b) % b;
}
void Reverse16 ( void *  ptr)
inline

Definition at line 137 of file helpers.h.

{
ReverseN(ptr, 2);
}
void Reverse32 ( void *  ptr)
inline

Definition at line 142 of file helpers.h.

{
ReverseN(ptr, 4);
}
void Reverse64 ( void *  ptr)
inline

Definition at line 147 of file helpers.h.

{
ReverseN(ptr, 8);
}
void ReverseN ( void *  ptr,
int  num_bytes 
)
inline

Definition at line 126 of file helpers.h.

{
char *cptr = reinterpret_cast<char *>(ptr);
int halfsize = num_bytes / 2;
for (int i = 0; i < halfsize; ++i) {
char tmp = cptr[i];
cptr[i] = cptr[num_bytes - 1 - i];
cptr[num_bytes - 1 - i] = tmp;
}
}
int RoundUp ( int  n,
int  block_size 
)
inline

Definition at line 58 of file helpers.h.

{
return block_size * ((n + block_size - 1) / block_size);
}
void SkipNewline ( FILE *  file)
inline

Definition at line 41 of file helpers.h.

{
if (fgetc(file) != '\n') fseek(file, -1, SEEK_CUR);
}
int sort_floats ( const void *  arg1,
const void *  arg2 
)
inline

Definition at line 46 of file helpers.h.

{
float diff = *((float *) arg1) - *((float *) arg2);
if (diff > 0) {
return 1;
} else if (diff < 0) {
return -1;
} else {
return 0;
}
}
template<typename T1 , typename T2 >
void UpdateRange ( const T1 &  x,
T2 *  lower_bound,
T2 *  upper_bound 
)
inline

Definition at line 74 of file helpers.h.

{
if (x < *lower_bound)
*lower_bound = x;
if (x > *upper_bound)
*upper_bound = x;
}
template<typename T1 , typename T2 >
void UpdateRange ( const T1 &  x_lo,
const T1 &  x_hi,
T2 *  lower_bound,
T2 *  upper_bound 
)
inline

Definition at line 83 of file helpers.h.

{
if (x_lo < *lower_bound)
*lower_bound = x_lo;
if (x_hi > *upper_bound)
*upper_bound = x_hi;
}