diff options
| author | _ov4 <ov4@ov4.org> | 2026-10-20 11:00:16 +0000 |
|---|---|---|
| committer | _ov4 <ov4@ov4.org> | 2026-10-20 11:00:16 +0000 |
| commit | 0c4db4fea1960571318444bd39593533b04b3716 (patch) | |
| tree | c0370d23f10225a6ee3dfe73590f38ca05877606 /pseudocode-lib | |
| parent | cf9af14fe749c52473fdf5a327c3e935e45bf0e7 (diff) | |
feat(library): add experimental string RIGHT function
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Diffstat (limited to 'pseudocode-lib')
| -rw-r--r-- | pseudocode-lib/README.md | 2 | ||||
| -rw-r--r-- | pseudocode-lib/_exp_string.cc | 7 | ||||
| -rw-r--r-- | pseudocode-lib/_exp_string.cps | 6 |
3 files changed, 15 insertions, 0 deletions
diff --git a/pseudocode-lib/README.md b/pseudocode-lib/README.md index b776d16..6a4c23c 100644 --- a/pseudocode-lib/README.md +++ b/pseudocode-lib/README.md @@ -20,3 +20,5 @@ INCLUDE paths are relative to the program. Adjust them when the program is elsew The library provides `&`, `_EXP_STRING_NUM_TO_STR` (INTEGER/REAL), `_EXP_STRING_STR_TO_NUM` (REAL), `_EXP_STRING_LENGTH` (byte length) and `_EXP_STRING_OUTPUT` (text plus newline). Numeric formatting uses `std::to_string`; parsing uses `std::stod` and requires full consumption. C++ standard exceptions print the user call line and are catchable with TRY/CATCH. The built-in STRING remains available with its existing lifetime and NUL limitations. Owning class values inside whole-record or BYVAL-array copies still have bitwise-copy limitations. `_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. diff --git a/pseudocode-lib/_exp_string.cc b/pseudocode-lib/_exp_string.cc index ada7c8c..d881187 100644 --- a/pseudocode-lib/_exp_string.cc +++ b/pseudocode-lib/_exp_string.cc @@ -73,6 +73,13 @@ void _exp_string_impl_left(void *Target, void *Handle, long long Count) { text(Target) = Source.substr(0, Length); }); } +void _exp_string_impl_right(void *Target, void *Handle, long long Count) { + checked([&] { + const auto &Source = text(Handle); + auto Length = Count <= 0 ? 0 : std::min(static_cast<std::size_t>(Count), Source.size()); + text(Target) = Source.substr(Source.size() - Length, 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 34b1302..31e3b43 100644 --- a/pseudocode-lib/_exp_string.cps +++ b/pseudocode-lib/_exp_string.cps @@ -15,6 +15,7 @@ EXTERN "C" EXTERN_PROCEDURE _exp_string_impl_from_real(_EXP_STRING_HANDLE, C_DOU EXTERN "C" EXTERN_FUNCTION _exp_string_impl_to_real(_EXP_STRING_HANDLE) RETURNS C_DOUBLE 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_output(_EXP_STRING_HANDLE) CLASS _EXP_STRING @@ -71,3 +72,8 @@ FUNCTION _EXP_STRING_LEFT(S : _EXP_STRING, Count : INTEGER) RETURNS _EXP_STRING CALL _exp_string_impl_left(Result._HANDLE, S._HANDLE, (_EXP_STRING_C_INTEGER)Count) RETURN Result ENDFUNCTION +FUNCTION _EXP_STRING_RIGHT(S : _EXP_STRING, Count : INTEGER) RETURNS _EXP_STRING + DECLARE Result : _EXP_STRING + CALL _exp_string_impl_right(Result._HANDLE, S._HANDLE, (_EXP_STRING_C_INTEGER)Count) + RETURN Result +ENDFUNCTION |