Luna/libluna/src/CPath.cpp

#include <luna/CPath.h>
#include <luna/CString.h>

static char dot[] = ".";

char* basename(char* path)
{
    // If path is NULL, or the string's length is 0, return .
    if (!path) return dot;
    usize len = strlen(path);
    if (!len) return dot;

    // Strip trailing slashes.
    char* it = path + len - 1;
    while (*it == '/' && it != path) { it--; }
    *(it + 1) = 0;
    if (it == path) return path;

    // Return path from the first character if there are no more slashes, or from the first character after the last
    // slash.
    char* beg = strrchr(path, '/');
    if (!beg) return path;
    return beg + 1;
}

char* dirname(char* path)
{
    // If path is NULL, or the string's length is 0, return .
    if (!path) return dot;
    usize len = strlen(path);
    if (!len) return dot;

    // Strip trailing slashes.
    char* it = path + len - 1;
    while (*it == '/' && it != path) { it--; }
    *(char*)(it + 1) = 0;
    if (it == path) return path;

    // Search for the last slash. If there is none, return .
    // Otherwise, we end the string there and return.
    char* end = strrchr(path, '/');
    if (!end) return dot;
    if (end != path) *end = 0;
    else
        *(end + 1) = 0;
    return path;
}