gw-basic-2026

44 Commits 1 Branch 1 Tag

3 Commits

Include renames

Author	SHA1	Message	Date
Eremey Valetov	e535250f6c	Fix compiler QA round 2: nested FOR/NEXT, remove unused code, clean warnings - FOR/NEXT: use a FOR stack to match NEXT variables to their corresponding FOR labels, fixing nested loops (e.g., FOR I...FOR J...NEXT J...NEXT I) - Remove unused emit_int_expr function - Build now zero warnings across all targets - Compiler passes 15 of 72 test programs (Phase 1 target: ~30)	2026-03-29 10:03:46 -04:00
Eremey Valetov	4dc255118a	Fix compiler QA: misleading indentation, DATA escaping, NEXT safety, bounds - codegen.c: refactor one-liner function cases to proper multi-line blocks, eliminating all -Wmisleading-indentation warnings - codegen.c: escape quotes and backslashes in DATA pool string literals - codegen.c: guard NEXT against for_label_counter=0 (NEXT without FOR) - codegen.c: remove unused functions (emit_expr, read_sng, read_dbl) - analysis.c: add bounds check on data_line_map writes - Build now produces zero warnings across all three targets	2026-03-29 09:38:15 -04:00
Eremey Valetov	d3b57d9f3b	Implement ahead-of-time compiler (Phase 1): BASIC to C via token stream New tool gwbasic-compile translates tokenized .bas programs to C source, which gcc compiles into native executables linked against libgwrt.a (the interpreter's runtime modules minus the execution loop). Pipeline: .bas → gw_crunch() → analysis pass (line table, variable census, GOTO targets, DATA collection) → C codegen → gcc → native executable. Phase 1 supports: PRINT, LET, IF/THEN/ELSE, GOTO, GOSUB/RETURN, FOR/NEXT, END/STOP/SYSTEM, REM, DATA/READ/RESTORE, CLS, arithmetic/relational/logical operators, core math functions (SIN, COS, SQR, ABS, etc.), string functions (LEFT$, RIGHT$, MID$, CHR$, ASC, VAL, STR$, LEN, etc.), string concatenation. All control flow uses goto/labels (no C for/while) so GOTO into loops works. GOSUB uses a return-label stack with switch dispatch.	2026-03-29 06:59:42 -04:00

Author

SHA1

Message

Date

Eremey Valetov

e535250f6c

Fix compiler QA round 2: nested FOR/NEXT, remove unused code, clean warnings

- FOR/NEXT: use a FOR stack to match NEXT variables to their corresponding
  FOR labels, fixing nested loops (e.g., FOR I...FOR J...NEXT J...NEXT I)
- Remove unused emit_int_expr function
- Build now zero warnings across all targets
- Compiler passes 15 of 72 test programs (Phase 1 target: ~30)

2026-03-29 10:03:46 -04:00

Eremey Valetov

4dc255118a

Fix compiler QA: misleading indentation, DATA escaping, NEXT safety, bounds

- codegen.c: refactor one-liner function cases to proper multi-line blocks,
  eliminating all -Wmisleading-indentation warnings
- codegen.c: escape quotes and backslashes in DATA pool string literals
- codegen.c: guard NEXT against for_label_counter=0 (NEXT without FOR)
- codegen.c: remove unused functions (emit_expr, read_sng, read_dbl)
- analysis.c: add bounds check on data_line_map writes
- Build now produces zero warnings across all three targets

2026-03-29 09:38:15 -04:00

Eremey Valetov

d3b57d9f3b

Implement ahead-of-time compiler (Phase 1): BASIC to C via token stream

New tool gwbasic-compile translates tokenized .bas programs to C source,
which gcc compiles into native executables linked against libgwrt.a (the
interpreter's runtime modules minus the execution loop).

Pipeline: .bas → gw_crunch() → analysis pass (line table, variable census,
GOTO targets, DATA collection) → C codegen → gcc → native executable.

Phase 1 supports: PRINT, LET, IF/THEN/ELSE, GOTO, GOSUB/RETURN, FOR/NEXT,
END/STOP/SYSTEM, REM, DATA/READ/RESTORE, CLS, arithmetic/relational/logical
operators, core math functions (SIN, COS, SQR, ABS, etc.), string functions
(LEFT$, RIGHT$, MID$, CHR$, ASC, VAL, STR$, LEN, etc.), string concatenation.

All control flow uses goto/labels (no C for/while) so GOTO into loops works.
GOSUB uses a return-label stack with switch dispatch.

2026-03-29 06:59:42 -04:00