libHX is a C and C++ library with utility functions for maps, deques, linked lists, string formatting and autoresizing, command-line option parsing, config file parsing, type checking casts and more.

Resources

Latest release: 5.2 (2025-10-19)
Many Linux distributions already ship packages — just use their package system! See the Distro Availability Matrix [repology.org].
Source code release archive
Git source code repository – https://codeberg.org/jengelh/libhx
Git source code repository – https://git.inai.de/libhx (clone only; no webview)

Components (by all means not all)

socket auxiliary functions for daemons switching to unprivileged mode
rb-tree based map/set, hash-based unordered_map/unordered_set (HXmap_*)
doubly-linked lists with independent or inline information nodes (HXdeque_*, code>HXlist_*, HXclist_*)
multiplatform directory handling (HXdir_*), open-read, mkdir -p, rm -Rf
string formatter with string and function placeholders (HXformat_*)
memory containers, auto-sizing string type (HXmc_*)
option parsing (HXoption_*), table-based with optional callbacks, long options available.
socket utility function for trivial listening and connecting
shellconfig parser (HXshconfig_*), a parser for /etc/sysconfig.
string operation library: e.g. basename, chomp, dirname, getl(ine), split, strlower/-upper, str*trim, strsep, strsep2, etc.