timeparse-masm

Tiny MASM x64 example that parses a time string like "12:30" or "1:30" and returns a packed 16-bit value:

• AH = hour
• AL = minute

The goal is intentionally small: one MASM function + a C harness.

What this repo contains

• src/convert_time.asm - ConvertStrTimeToInt(const char* s) (MASM, x86-64)
• src/main.c - small test harness
• scripts/build.ps1 - local build + smoke test
• .github/workflows/release.yml - CI build (PRs / main pushes) + release on tags
• docs/WHY.md - "why this setup" with pointers to official docs

Build locally (Windows)

Prereq: Visual Studio (or "Build Tools for Visual Studio") with the Desktop development with C++ workload (so you have cl, link, and ml64).

1. Open x64 Native Tools Command Prompt (or run the equivalent vcvars64.bat).
2. From repo root:

scripts\build.cmd

Output:

• build\timeparse.exe

CI / Releases

• Every PR and push to main builds and runs the smoke test.
• Pushing a tag like v0.1.0 additionally creates a GitHub Release and attaches:
  • timeparse.exe
  • timeparse.exe.sha256

See docs/WHY.md for the official doc links.