Contignuous containers:

      lib/range.h          tuple {start,end,size} a pointer range with item size in bytes
      lib/strarray.h       an array of pointer to string, string always '\0' terminated, vector always NULL terminated
      lib/strlist.h        character separated list (\0 \n , ...) in a stralloc


  Linked list containers:

      lib/slist.h          single ended queue (head) singly linked (next) list container.
                           mutable traversal using node** x = &head
                           iteration with node* p = head

      lib/list.h           double ended queue (head,tail) using double linked lists (prev,next)
                           with list traversal macros list_foreach,*_safe,*_reverse

  Assiociative and hierarchical containers:

      lib/hmap.h           hash map container with ownership on property of built-in type or custom *ptr,struct_size
      lib/hashmap.h        associative map container using hashed bucket algorithms
      lib/cb.h             crit-bit trees
      lib/cbmap.h          an associative map container based on crit-bittrees
      lib/map.h



      lib/http.h           HTTP client model with requests, responses and headers, compression chains async reading via iopause
      lib/charbuf.h        an 1-byte character buffer


  Serialization / Data formats:

      lib/json.h           JSON callback and tree parsers, tree iteration, token output
      lib/xml.h            XML read with callback, set of functions for building element and attribute lists
      lib/playlist.h       Read/write Playlist generic playlist abstraction

   Word expand, exec and wait process

      lib/expand.h         shell word expansion of ${vars}, special params and backticks command into string list
      lib/process.h        exec and wait for processes
      lib/wait.h           wait/waitpid from djb
      lib/sig.h            sig action/block from djb


      lib/var.h            Lexically ordered NAME=VALUE pairs with attributes (exported, local, readonly, ...)
      lib/vartab.h         Table for variable lookup stacked for subshell context


  Dumb charset conversion UCS, UTF-8, Latin 1

      lib/ucs.h


  Periphery / Sensing

      lib/gpio.h           Memory map Raspberry Pi GPIO pins, provide tri-state digital i/o


  Base function from fefe libowfat:

        array    dns      open     taia
        buffer   examples scan     test
        byte     fmt      socket   textcode
        case     io       str      uint
        cdb      mmap     stralloc unix
        critbit  mult     tai


      lib/array.h          allocated byte vector item indexing with umult64
      lib/buffer.h         buffered standard input/output/error. op is pointer to a read/write(fd,buf,len) = num_bytes
      lib/byte.h           operations on fixed length byte ranges
      lib/case.h           case-insensitive versions of str comparision functions from fefe libowfat
      lib/dns.h            djbdns client api
      lib/fmt.h            formatted output into byte buffer functions
      lib/io.h             libfefe I/O muxing for unix and windows
      lib/alloc.h          alloc, alloc_re, alloc_free djb interface

      lib/iarray.h         array of integers container
      lib/fmt.h            formatted output into byte buffer functions
      lib/io.h             libfefe I/O muxing for unix and windows
      lib/dns.h            djbdns client api
      lib/errmsg.h         fefe libowfat





  Command line (CLI) utilities:

      pkgcfg.c             Drop-in pkg-config, prints compile and link flags for package
      impgen.c             Generate a .DEF file from a .DLL library

      ar-wrap.c            generic cross-compiler wrapper for the archiver (lib bundler)
      cc-wrap.c            generic cross-compiler wrapper for the front (preprocessor, compiler, assembler)
      compiler-wrapper.c   A compiler driver for Microchip PIC toolchains (picc,picc18,xc8,sdcc)
      cmake-run.c          find cross environment using dir and path functions and pass it to CMake

      genmakefile.c        Makefile / Ninja generator based on

                                *.c *.h          files
                                .                directories

                                CC, CFLAGS       compiler, flags

                                AR, ARFLAGS      librarian
                                LINK, LDFLAGS    linker, flags

                                -L and -l        add library
                                -I and -D        add include/definition


      ntldd.c              recurse dynamic bindings of .exe files like /usr/bin/ldd on Linux
      pelist.c             List .EXE and .DLL file sections, import tables and export directories
      omflist.c            List OMF object files symbols
      cofflist.c           List COFF object files symbols
      elflist.c            List Elf32 headers, sections, segments, symbols and dynamic section
      elf64list.c          List Elf64 headers, sections, segments, symbols and dynamic section
      macho32list.c        List Mach-O segments and symbol table


  Compression and integrity

      ccat.c               Compressed file cat with getopt() options and error reporting
      crc32.c              Calculate crc32 checksum, using zlib or diet version


  Network utilities

      dnsip.c              Resolve hostname into IP addresses (NS from resolv.conf or DNSCACHE environment variable)
      dnsname.c            Reverse lookup of IP address
      tcping.c             try to TCP connect and output time of each acknowledge or reset


  Binary file tools

      bsdiffcat.c          Translates a binary diff made with bsdiff into patch(buf, offset, ifval, thenval) calls
      hexedit.c            Memory map a file and process a set of patch data in the form: ADDRESS IF-BYTE SET-BYTE
      torrent-progress.c   memory map incomplete torrent data calculate percentage of pages which are all zero-bytes


  Media and streams

      mediathek-list.c     HTTP load and filter mediathek-filme.json of the MediathekView application
      mediathek-parser.c   Parse a mediathek-filme.json store and generate a Playlist from it

  Windows registry

      reg2cmd.c            Convert a windows registry .REG file into a .BAT with REG ADD commands
      regfilter.c          zombie copy reg2cmd, was intended a filtering version, like grepdiff


  Path helpers

      pathtool.c           dropin for realpath, with --relative-to DIR feature and windows/msys support cygpath compliant
      sln.c                for a /usr/lib/libX.so.major.minor file pass one or more link names: libX.so.major libX.so /lib/libX.so
      msys-shell.c         Registry & path search for msys/msys2 environments and launch mintty and bash inside

  Utilities reading/writing XML/JSON

      opensearch-dump.c    parse an OpenSearch XML file into an URL /search?query=%s to have them in Firefox/Chrome
      plsconv.c            Convert playlists between the formats .M3U .PLS .XSPF

      xmlpp.c              pretty-print XML/XHML
      jsonpp.c             Pretty-print JSON data
      xml2json.c           convert an element tree into json objects { tagName, ...attributes, children: [ ..innerElements
      xml2moon.c           convert XHTML content into lapis html generator syntax: element prop: val, prop2: ..

      eagle-gen-cmds.c     Read EAGLE XML schematics/layouts and generate commands to draw contour and x/y axis measures
      eagle-init-brd.c     Generate component arrangement congruent with Schematic and generate translate and rotate commands
      eagle-to-circuit.c   Read EAGLE XML packages and netlists, write .circuit file for striprouter


  Basic usage examples or boilerplates:

      binfmttest.c         Test binary format readers
      buffertest.c         Test I/O buffer system, chaining with zlib/bzip2/lzma filter
      dnstest.c            Test DNS resolver
      httptest.c           Test HTTP client
      jsontest.c           Test JSON parser
      strarraytest.c       Test array of char* pointer functions
      xmltest.c            Test XML reading with callbacks (diet version of SAX)
      xmltest2.c           Test XML reading as tree (diet version of DOM)
      xmltest3.c           Test XML traversal and selection (diet version of getElementBy* and XPath)
      xmltest4.c           Test XML query
      ziptest.c            Simple universal file compression of *.gz, *.bz2, *.xz based on file extension