errors.c

#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdbool.h>
#include "errors.h"
#include "globals.h"

const char *FUNC_AS_VAR             = "Attempting to use function %s as a variable.\n";
const char *UNDECLARED_INDENTIFIER  = "Undeclared identifier \"%s\".\n";
const char *BIN_OPERAND_TYPE        = "%s operand for %s has type %s, should be %s.\n";
const char *UNARY_OPERAND_TYPE      = "Unary operation %s expects type %s, found type %s.\n";
const char *ARRAY_INDEX_TYPE        = "Attempting to index array with %s, should be INT.\n";
const char *ARGS_TO_VOID            = "Attempting to supply arguments to a void function.\n";
const char *ARG_TYPE_MISMATCH       = "Argument %d to %s expected %s, found %s.\n";
const char *NUM_ARGS_DIFFER         = "%s expected %d arguments, found %d arguments.\n";
const char *VAR_AS_FUNCTION         = "Attempting to call variable %s as function.\n";
const char *CALL_UNDEF_FUNCTION     = "Attempting to call undefined function %s.\n";
const char *RETURN_FROM_VOID        = "Attempting to return %s from function declared as VOID.\n";
const char *RETURN_MISMATCH         = "Attempting to return %s from function declared to return %s.\n";
const char *VAR_TYPE_MISMATCH       = "Attempting to assign %s to variable of type %s.\n";
const char *ARRAY_AS_VAR            = "%s is an array, requires an index.\n";
const char *VAR_AS_ARRAY            = "%s is not an array, should not have an index.\n";
const char *ASSIGN_TO_FUNC          = "Attempting to assign to function.\n";
const char *INVALID_COND            = "Expected condition with type BOOL, found type %s.\n";
const char *NON_VOID_STMT_FUNC      = "Attempting to call non-void function of type %s in statement.\n";

/* SYMBOL TABLE ERRORS */
const char *REDECL_GLOBAL_VAR       = "Attempting to redeclare global variable %s.\n";
const char *VAR_ALREADY_DECLARED    = "The variable %s has already been declared.\n";
const char *REDEF_PROTOTYPE         = "Attempting to redefine prototype for function %s.\n";
const char *REDEF_FUNCTION          = "Attempting to redefine function %s.\n";
const char *REDEF_EXTERN            = "Attempting to define function %s originally declared as extern.\n";
const char *CHANGE_RET_TYPE         = "Attempting to change return type of %s from %s to %s.\n";
const char *ARG_TYPE_CHANGE         = "Attempting to change argument %d of %s to expect %s instead of %s.\n";
const char *ARG_NUM_CHANGE          = "Attempting to change %s to take %d arguments instaed of %d.\n";
const char *REDEF_WITH_ARGS         = "Attempting to change redeclare %s to take arguments.\n";
const char *REDEF_WITHOUT_ARGS      = "Attempting to change redeclare %s to take no arguments.\n";
const char *REDEF_VAR_AS_FUNC       = "Attempting to redefine variable %s as function.\n";


void error(const char *format, ...) {
    fprintf(stderr, "Error on line %d: ", mylineno);

    va_list args;
    va_start(args, format);
    vfprintf(stderr, format, args);
    va_end(args);

    foundError = true;
}