本文整理汇总了C++中FILE::gcount方法的典型用法代码示例。如果您正苦于以下问题：C++ FILE::gcount方法的具体用法？C++ FILE::gcount怎么用？C++ FILE::gcount使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类FILE的用法示例。
在下文中一共展示了FILE::gcount方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: fin
int
do_import(std::string file, int sorted, uint_t limit,
int &rnadded, int &rnlines) {
#if defined USE_CXX_IO
std::ifstream fin(file.c_str());
#else
FILE *fin = fopen(file.c_str(), "r");
#endif
int fd = open(file.c_str(), O_RDONLY);
// Potential race condition + not checking for return value
if_length = file_size(file.c_str());
DCERR("handle_import::file:"<<file<<endl);
if (!fin || !fd) {
return -IMPORT_FILE_NOT_FOUND;
}
else {
building = true;
int nlines = 0;
int foffset = 0;
if (if_mmap_addr) {
munmap(if_mmap_addr, if_length);
}
// mmap() the input file in
if_mmap_addr = (char*)mmap(NULL, if_length, PROT_READ, MAP_SHARED, fd, 0);
if (!if_mmap_addr) {
fclose(fin);
close(fd);
return -IMPORT_FILE_NOT_FOUND;
}
pm.repr.clear();
char buff[INPUT_LINE_SIZE];
while (
#if defined USE_CXX_IO
fin
#else
!feof(fin)
#endif
&& limit--) {
buff[0] = '\0';
#if defined USE_CXX_IO
fin.getline(buff, INPUT_LINE_SIZE);
const int llen = fin.gcount();
buff[INPUT_LINE_SIZE - 1] = '\0';
#else
char *got = fgets(buff, INPUT_LINE_SIZE, fin);
if (!got) {
break;
}
const int llen = strlen(buff);
if (llen && buff[llen-1] == '\n') {
buff[llen-1] = '\0';
}
#endif
++nlines;
int weight = 0;
std::string phrase;
StringProxy snippet;
InputLineParser(if_mmap_addr, foffset, buff, &weight, &phrase, &snippet).start_parsing();
foffset += llen;
if (!phrase.empty()) {
str_lowercase(phrase);
DCERR("Adding: "<<weight<<", "<<phrase<<", "<<std::string(snippet)<<endl);
pm.insert(weight, phrase, snippet);
}
}
fclose(fin);
pm.finalize(sorted);
vui_t weights;
for (size_t i = 0; i < pm.repr.size(); ++i) {
weights.push_back(pm.repr[i].weight);
}
st.initialize(weights);
rnadded = weights.size();
rnlines = nlines;
building = false;
}
return 0;
}