68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
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/*
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* Tiny BASIC
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* Error Handling Header
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*
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* Copyright (C) Damian Gareth Walker 2019
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* Created: 15-Aug-2019
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*/
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#ifndef __ERRORS_H__
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#define __ERRORS_H__
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/*
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* Data Definitions
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*/
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/* error codes */
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typedef enum {
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E_NONE, /* no error; everything is fine */
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E_INVALID_LINE_NUMBER, /* line number is invalid */
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E_UNRECOGNISED_COMMAND, /* command was not recognised */
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E_INVALID_VARIABLE, /* variable expected but something else encountered */
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E_INVALID_ASSIGNMENT, /* = expected but something else encountered */
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E_INVALID_EXPRESSION, /* an invalid expression was encountered */
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E_MISSING_RIGHT_PARENTHESIS, /* Encountered "(" without corresponding ")" */
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E_INVALID_PRINT_OUTPUT, /* failed to parse print output */
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E_BAD_COMMAND_LINE, /* error on invocation */
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E_FILE_NOT_FOUND, /* cannot open source file */
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E_INVALID_OPERATOR, /* unrecognised operator */
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E_THEN_EXPECTED, /* didn't find the expected THEN after an IF */
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E_UNEXPECTED_PARAMETER, /* more parameters encountered than expected */
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E_RETURN_WITHOUT_GOSUB, /* return encountered without a GOSUB */
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E_DIVIDE_BY_ZERO, /* an attempt to divide by zero */
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E_OVERFLOW, /* integer is out of range */
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E_MEMORY, /* out of memory */
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E_TOO_MANY_GOSUBS, /* recursive GOSUBs exceeded the stack size */
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E_LAST /* placeholder */
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} ErrorCode;
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/* error handler structure */
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typedef struct error_handler ErrorHandler;
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typedef struct error_handler {
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void *data; /* private data */
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void (*set_code) (ErrorHandler *, ErrorCode, int, int);
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ErrorCode (*get_code) (ErrorHandler *);
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int (*get_line) (ErrorHandler *);
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int (*get_label) (ErrorHandler *);
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char *(*get_text) (ErrorHandler *);
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void (*destroy) (ErrorHandler *);
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} ErrorHandler;
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/*
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* Constructors
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*/
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/*
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* Principal constructor
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* returns:
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* ErrorHandler* the new error handler object
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*/
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ErrorHandler *new_ErrorHandler (void);
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#endif
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