Eremey Valetov
d8e8375366
GW-BASIC reimplementation in C11, using Microsoft's open-sourced 8088 assembly as the authoritative reference. Tokenizer (CRUNCH/LIST), expression evaluator with operator precedence, all math functions (SIN, COS, TAN, ATN, SQR, LOG, EXP, RND, etc.), string functions (LEFT$, RIGHT$, MID$, CHR$, ASC, VAL, STR$, etc.), PRINT statement with comma/semicolon zones, TAB(), SPC(). Handles integer/single/double types with correct promotion, D exponent for double-precision literals, type suffixes (%, !, #), &H hex/&O octal literals, MBF conversion routines, and GW-BASIC-compatible number formatting. Platform-independent via HAL vtable; POSIX backend included.
35 lines
764 B
C
35 lines
764 B
C
#ifndef GW_HAL_H
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#define GW_HAL_H
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#include <stdint.h>
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#include <stdbool.h>
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/* Hardware Abstraction Layer vtable */
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typedef struct hal_ops {
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/* Terminal I/O */
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void (*putch)(int ch);
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void (*puts)(const char *s);
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int (*getch)(void); /* blocking read */
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bool (*kbhit)(void); /* key available? */
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void (*locate)(int row, int col);
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int (*get_cursor_row)(void);
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int (*get_cursor_col)(void);
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void (*cls)(void);
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void (*set_width)(int cols);
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/* Terminal properties */
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int screen_width;
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int screen_height;
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/* Lifecycle */
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void (*init)(void);
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void (*shutdown)(void);
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} hal_ops_t;
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extern hal_ops_t *gw_hal;
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/* Platform implementations */
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hal_ops_t *hal_posix_create(void);
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#endif
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