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#include "page.cpp"
struct Buffer {
const char *name;
Page *storage;
Buffer(const char *name) : name(name), storage(new Page()) {}
void read_file(const char *pathname) {
int file = open(pathname, O_RDONLY);
Page *iter = storage;
int bytes_read = read(file, iter->elements, PAGE_SIZE);
iter->gap_start = bytes_read;
iter->element_count = bytes_read;
while (bytes_read == PAGE_SIZE) {
iter->next = new Page();
iter = iter->next;
bytes_read = read(file, iter->elements, PAGE_SIZE);
iter->gap_start = bytes_read;
iter->element_count = bytes_read;
}
close(file);
}
void write_file(const char *pathname) {
int file = open(pathname, O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
Page *iter = storage;
while (iter) {
write(file, iter->elements, iter->gap_start);
write(file, iter->elements + iter->gap_end, PAGE_SIZE - iter->gap_end);
iter = iter->next;
}
close(file);
}
};
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