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Path Utility (path)

Filesystem path manipulation utilities: classify absolute/relative paths, extract basename, dirname, and file extension.

API​

int is_absolute_path(const char * path);
int is_relative_path(const char * path);
char * path_basename(char * path);
char * path_dirname(char * path);
const char * path_fileext(const char * filename);
  • is_absolute_path — Return 1 if path is absolute ("/"-prefixed or Windows drive-letter path like "C:\"), 0 otherwise
  • is_relative_path — Return 1 if path is relative (not absolute), 0 otherwise
  • path_basename — Return pointer to the basename component within path (after the last '/')
  • path_dirname — Return pointer to the dirname component within path (modifies path in place by inserting '\0' after dirname)
  • path_fileext — Return pointer to the file extension within filename (after the last '.'), or empty string if no extension

Example​

is_absolute_path("/usr/bin");     /* 1 */
is_absolute_path("C:\\Windows");  /* 1 */
is_relative_path("src/main.c");   /* 1 */

char buf1[] = "/usr/bin/gcc";
char * base = path_basename(buf1);  /* "gcc" */

char buf2[] = "/usr/bin/gcc";
char * dir = path_dirname(buf2);    /* "/usr/bin" */

const char * ext = path_fileext("main.c");  /* "c" */