From 65599524f5b41ffb6d8d55664611612c0b57ad47 Mon Sep 17 00:00:00 2001 From: _ov4 Date: Tue, 20 Oct 2026 11:01:01 +0000 Subject: feat(library): add experimental string MID function Co-Authored-By: Claude Opus 5.5 --- pseudocode-lib/README.md | 2 ++ pseudocode-lib/_exp_string.cc | 8 ++++++++ pseudocode-lib/_exp_string.cps | 6 ++++++ 3 files changed, 16 insertions(+) (limited to 'pseudocode-lib') diff --git a/pseudocode-lib/README.md b/pseudocode-lib/README.md index 6a4c23c..55367d0 100644 --- a/pseudocode-lib/README.md +++ b/pseudocode-lib/README.md @@ -22,3 +22,5 @@ The library provides `&`, `_EXP_STRING_NUM_TO_STR` (INTEGER/REAL), `_EXP_STRING_ `_EXP_STRING_LEFT(S : _EXP_STRING, Count : INTEGER)` returns a new `_EXP_STRING` containing up to Count bytes from the beginning. Nonpositive counts return an empty string; counts exceeding the length return the whole string. Embedded NUL bytes are preserved. `_EXP_STRING_RIGHT(S : _EXP_STRING, Count : INTEGER)` returns a new `_EXP_STRING` containing up to Count bytes from the end. Nonpositive counts return an empty string; counts exceeding the length return the whole string. Embedded NUL bytes are preserved. + +`_EXP_STRING_MID(S : _EXP_STRING, Start : INTEGER, Count : INTEGER)` returns a new `_EXP_STRING` containing up to Count bytes from the one-based Start position. Starts below 1 clamp to 1; starts beyond the end and nonpositive counts return an empty string. Counts clamp to the remaining bytes. Embedded NUL bytes are preserved. diff --git a/pseudocode-lib/_exp_string.cc b/pseudocode-lib/_exp_string.cc index d881187..d406274 100644 --- a/pseudocode-lib/_exp_string.cc +++ b/pseudocode-lib/_exp_string.cc @@ -80,6 +80,14 @@ void _exp_string_impl_right(void *Target, void *Handle, long long Count) { text(Target) = Source.substr(Source.size() - Length, Length); }); } +void _exp_string_impl_mid(void *Target, void *Handle, long long Start, long long Count) { + checked([&] { + const auto &Source = text(Handle); + auto Position = Start <= 1 ? 0 : std::min(static_cast(Start - 1), Source.size()); + auto Length = Count <= 0 ? 0 : std::min(static_cast(Count), Source.size() - Position); + text(Target) = Source.substr(Position, Length); + }); +} void _exp_string_impl_output(void *Handle) { checked([&] { const auto &Text = text(Handle); diff --git a/pseudocode-lib/_exp_string.cps b/pseudocode-lib/_exp_string.cps index 31e3b43..30eef71 100644 --- a/pseudocode-lib/_exp_string.cps +++ b/pseudocode-lib/_exp_string.cps @@ -16,6 +16,7 @@ EXTERN "C" EXTERN_FUNCTION _exp_string_impl_to_real(_EXP_STRING_HANDLE) RETURNS EXTERN "C" EXTERN_FUNCTION _exp_string_impl_length(_EXP_STRING_HANDLE) RETURNS _EXP_STRING_C_INTEGER EXTERN "C" EXTERN_PROCEDURE _exp_string_impl_left(_EXP_STRING_HANDLE, _EXP_STRING_HANDLE, _EXP_STRING_C_INTEGER) EXTERN "C" EXTERN_PROCEDURE _exp_string_impl_right(_EXP_STRING_HANDLE, _EXP_STRING_HANDLE, _EXP_STRING_C_INTEGER) +EXTERN "C" EXTERN_PROCEDURE _exp_string_impl_mid(_EXP_STRING_HANDLE, _EXP_STRING_HANDLE, _EXP_STRING_C_INTEGER, _EXP_STRING_C_INTEGER) EXTERN "C" EXTERN_PROCEDURE _exp_string_impl_output(_EXP_STRING_HANDLE) CLASS _EXP_STRING @@ -77,3 +78,8 @@ FUNCTION _EXP_STRING_RIGHT(S : _EXP_STRING, Count : INTEGER) RETURNS _EXP_STRING CALL _exp_string_impl_right(Result._HANDLE, S._HANDLE, (_EXP_STRING_C_INTEGER)Count) RETURN Result ENDFUNCTION +FUNCTION _EXP_STRING_MID(S : _EXP_STRING, Start : INTEGER, Count : INTEGER) RETURNS _EXP_STRING + DECLARE Result : _EXP_STRING + CALL _exp_string_impl_mid(Result._HANDLE, S._HANDLE, (_EXP_STRING_C_INTEGER)Start, (_EXP_STRING_C_INTEGER)Count) + RETURN Result +ENDFUNCTION -- cgit v1.3.1-4-g156e