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
|
#include <alignment/utils/FileUtils.hpp>
bool FileExists(std::string &fileName)
{
FILE *fp = fopen(fileName.c_str(), "r");
if (fp) {
// exists
fclose(fp);
return true;
} else {
return false;
}
}
void CriticalOpenRead(std::string &fileName, std::ifstream &file, std::ios::openmode mode)
{
file.open(fileName.c_str(), mode | std::ios::in);
if (!file.good()) {
std::cerr << "Could not open file:" << fileName << std::endl;
std::exit(EXIT_FAILURE);
}
}
int OpenRead(std::string &fileName, std::ifstream &file, std::ios::openmode mode)
{
file.open(fileName.c_str(), mode | std::ios::in);
return file.good();
}
void CriticalOpenWrite(std::string &fileName, std::ofstream &file, std::ios::openmode mode)
{
file.open(fileName.c_str(), mode | std::ios::out);
if (!file.good()) {
std::cerr << "Could not open file: " << fileName << std::endl;
std::exit(EXIT_FAILURE);
}
}
int OpenWrite(std::string &fileName, std::ofstream &file, std::ios::openmode mode)
{
file.open(fileName.c_str(), mode | std::ios::out);
return file.good();
}
int CountLinesInFile(std::string fileName)
{
char *filePtr;
long fileSize;
int fileDes;
fileDes = open(fileName.c_str(), O_RDONLY);
fileSize = lseek(fileDes, 0, SEEK_END);
lseek(fileDes, 0, SEEK_SET);
filePtr = (char *)mmap(0, fileSize, PROT_READ, MAP_PRIVATE, fileDes, 0);
long pos;
int numLines = 0;
for (pos = 0; pos < fileSize; pos++, filePtr++) {
if (*filePtr == '\n') {
numLines++;
}
}
return numLines;
}
|
