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Docs: reflect net48; convert tools projects to net48

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Documentation now describes the .NET Framework 4.8 stack (was .NET 8):
- README build prerequisites + framework-dependent/no-runtime-install note,
  test count 136 -> 241.
- PLAN.md architecture diagram, stack decision (with PolySharp/shims note),
  suite total 136 -> 241.
- deploy/README-DEPLOY.txt: app is net48 framework-dependent (4.8 is in-box on
  Win10/11), and build prerequisites.

Also migrate the three tools (RioJoySmokeTest, RioSerialMonitor, XcfRegionExtract)
to net48 so they keep building against the now-net48 RioJoy.Core (a net8 project
cannot reference a net48 one). Added PolySharp + System.Memory/System.Text.Json
shims and replaced net-core-only APIs (string.Contains/IndexOf with comparison,
Array.Fill, generic Enum.IsDefined, int.TryParse(span)). All three build clean.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Cyd
2026-06-30 13:11:25 -05:00
co-authored by Claude Opus 4.8
parent fe87c79f55
commit 270abfc5ad
9 changed files with 51 additions and 16 deletions
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tools/XcfRegionExtract/Program.cs
+1 -1
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@@ -30,7 +30,7 @@ ulong U64() { ulong v = 0; for (int i = 0; i < 8; i++) v = (v << 8) | d[pos++];
string magic = Encoding.ASCII.GetString(d, 0, 9); // "gimp xcf "
string ver = Encoding.ASCII.GetString(d, 9, 4); // "file" (=v0) or "vNNN"
if (magic != "gimp xcf ") { Console.Error.WriteLine($"Not an XCF file: '{magic}'"); return 1; }
bool ptr64 = ver[0] == 'v' && int.TryParse(ver.AsSpan(1, 3), out int vn) && vn >= 11;
bool ptr64 = ver[0] == 'v' && int.TryParse(ver.Substring(1, 3), out int vn) && vn >= 11;
long Ptr() => ptr64 ? (long)U64() : U32();
pos = 14;