wildling

x86-64 Linux NASM port of wildling. Every piece of wildling logic — string utilities, growable vectors/dictionaries, token expansion, hand-rolled (non-regex) pattern splitting, JSON template parsing, and the CLI itself — is written directly in NASM assembly. There is no C or C++ source for wildling logic; gcc is used only as the linker/CRT so the assembly can call into glibc (malloc, free, strlen, strcmp, printf, fprintf, fopen, fread, fclose, exit, atoi, strtod, …).

Docs: Website · Sandbox · Syntax · Source

Example

http://${'dev,stage,prod'}\-${'api,web'}#{0-2}.example.${'com,net,org'}/@.html

(The \- is a literal hyphen; bare - would mean “one letter or digit”. @ is one lowercase letter.)

That builds URL-shaped candidates: scheme http://, then environment × service × optional digits × TLD, then a one-letter path page. Three environments, two services, zero–two digits ('', 0–9, 00–99), three TLDs, and a–z → 51948 strings — the kind of list you generate for fuzzing links or probing staging hosts, not type out.

A few of them:

http://dev-api.example.com/a.html / http://stage-web.example.com/z.html
http://dev-api0.example.net/a.html / http://prod-web9.example.org/m.html
http://dev-api00.example.com/a.html / http://prod-web99.example.org/z.html

Named dictionaries (%{'hosts'}) work the same way when the word lists live in files.

Try it in the sandbox, or see pattern syntax for length ranges, dictionaries, and escapes.

Stack

NASM (elf64, System V AMD64 ABI)
gcc 14 (Docker gcc:14-bookworm) for linking against glibc's CRT only
glibc (malloc, printf, strtod, …) — no POSIX regex; pattern splitting is hand-rolled

Build

./build.sh

Produces dist/wildling and copies shared dist/help.txt. The build runs entirely inside Docker (gcc:14-bookworm): nasm is installed via apt, every .asm file under src/ is assembled with nasm -f elf64, and the resulting object files are linked with gcc -o dist/wildling src/*.o.

CLI

./bin/wildling "Year 19##"
./bin/wildling --help

From a release tag:

```bash
git clone --branch v2.0.0 --depth 1 https://github.com/dotmonk/wildling.git
cd wildling
./build.sh assembly


Shared CLI contracts: [../docs/cli.md](https://github.com/dotmonk/wildling/blob/main/docs/cli.md).

## Layout

assembly/ src/ macros.inc shared struct offsets / stack helpers util.asm strings, growable vectors, dictionaries, file I/O token.asm token expansion parse_pattern.asm hand-rolled (no regex) pattern split + tokenizers generator.asm single-pattern generator wildling.asm multi-pattern API json.asm template JSON parser cli.asm CLI entry point (main), argument parsing, --check bin/wildling launcher script build.sh Docker build (nasm + gcc, glibc link only) dist/ build output (gitignored) ```