DPTLib

version 0.5.0

© David Thomas, 2013-2026

Overview

DPTLib is my platform independent C library. It contains a wide variety of functions, formed of various portable C code that I've written for PrivateEye, MotionMasks and other projects. Please consider it a permanent work in progress.

Modules

Base

• base/debug.h — debugging and logging macros
• base/result.h — generic function return values
• base/types.h — fixed-width integer types
• base/utils.h — various utilities

Databases

• databases/digest-db.h — digest database
• databases/filename-db.h — filename database
• databases/tag-db.h — tag database {docs}
• databases/pickle.h — (de-)serialising associative arrays {docs}
  • databases/pickle-reader-hash.h — glue methods to let pickle read from hashes
  • databases/pickle-writer-hash.h — glue methods to let pickle write to hashes

Data Structures

• datastruct/atom.h — indexed data block storage
• datastruct/bitarr.h — arrays of bits
• datastruct/bitfifo.h — fifo which stores bits
• datastruct/bitvec.h — flexible arrays of bits
• datastruct/cache.h — generic single-block cache {docs}
• datastruct/hash.h — associative arrays
• datastruct/hlist.h — "Hanson" linked list library - from the book C Interfaces and Implementations
• datastruct/list.h — linked lists
• datastruct/ntree.h — n-ary trees
• datastruct/vector.h — flexible arrays

Frame Buffer

• framebuf/bitmap.h — bitmap image type
  • framebuf/bitmap-set.h — a set of bitmap images
• framebuf/bmfont.h — a proportional bitmap font engine {docs}
• framebuf/colour.h — colour definition and conversion
• framebuf/composite.h — Porter-Duff image compositing {docs}
• framebuf/curve.h — Bezier curve calculations
• framebuf/palettes.h — standard colour palettes
• framebuf/pixelfmt.h — pixel formats
• framebuf/screen.h — screen type
• framebuf/span.h — interface of plotting methods
  • framebuf/span-registry.h — registry of plotting methods by pixel format
  • framebuf/span-bgrx8888.h — plotting methods for BGRx8888
  • framebuf/span-rgba8888.h — plotting methods for RGBA8888
  • framebuf/span-rgbx8888.h — plotting methods for RGBx8888
  • framebuf/span-xbgr8888.h — plotting methods for XBGR8888

Geometry

• geom/box.h — box type
• geom/packer.h — box packing for layout {docs}
• geom/layout.h — laying out elements using the packer
• geom/line.h — line type and clipping
• geom/point.h — point type

I/O

• io/path.h — filename path handling
• io/stream.h — stream system {docs}
  • io/stream-stdio.h — C standard IO stream implementation
  • io/stream-mem.h — memory block IO stream implementation
  • io/stream-packbits.h — PackBits compression - from TIFF
  • io/stream-mtfcomp.h — "move to front" adaptive compression stream - from the book Small Memory Software, Chapter 4

Test

• test/txtscr.h — text format 'screen'

Utilities

• utils/array.h — array utilities
• utils/barith.h — binary arithmetic
• utils/bsearch.h — binary searching arrays
• utils/bytesex.h — reversing bytesex
• utils/fxp.h — fixed point helpers
• utils/maths.h — maths utils
• utils/pack.h — structure packing and unpacking helpers
• utils/primes.h — cache of prime numbers

Wuss

• wuss/wuss.h — minimal window manager {docs}
  • wuss/window.h — window creation, positioning, sizing and client delegation

Building

Use CMake, e.g.:

mkdir build
cd build
cmake ..
make -j4

Testing

Enable BUILD_TESTS, e.g. using ccmake and build. Then invoke DPTLibTest like:

./DPTLibTest -resources <path to DPTLib>

It'll spew a load of test output. If successful you'll see:

++ Tests completed in 0.9909s: 20 of 20 tests passed.