int main(int argc, char *argv[]) {
// Declare a pointer to the input file
FILE *inFile;
// Declare a pointer to the root file name
char *rootName;
// Declare pointers to the head and tail of the symbol table
DEF_NODE *head, *tail;
// Set head and tail to NULL
head = tail = NULL;
// Initialize the errorIndex to 0
errorIndex = 0;
// Find the root file name and set it
rootName = (char *)findRootFileName(argv[IN_FILE]);
// Try to open the input file for reading
if((inFile = fopen(argv[IN_FILE], "r")) == NULL) {
// Print error message if file could not be opened
fprintf(stderr, "Could not open file: %s\n", argv[IN_FILE]);
// Fatal error, exit program
exit(1);
}
// Initialize all the opcodes
initOpcodes();
// Do the first pass and build the symbol table
passOne(inFile, &head, &tail);
// Rewind the input file so it is ready for the second pass
rewind(inFile);
// Do the second pass and check for errors
passTwo(inFile, &head, &tail);
// If there were errors in the input file...
if(errorIndex > 0) {
// Make an error file
writeErrFile(inFile, rootName);
}
// There were no errors in the input file
else {
// Write the symbol table file
printST(head, rootName);
// Write the object code file
writeObjFile(rootName);
}
// Try to close the input file
if(fclose(inFile) == EOF) {
// If file could not be closed, print error
fprintf(stderr, "Could not close file: %s\n", argv[IN_FILE]);
// Fatal error, exit program
exit(1);
}
// Program finished without errors, return 0
return 0;
}
int main (int argc, char *argv[]) {
if((argc > 2) || (argc <= 1)) {
printf("Syntax: ssasm <inputFileName>\n");
return 0;
}
writeOpcodeSheet();
printf("\n**********************************************************************************\n");
printf("\t\tSIC machine assembler by Suhas H and Sumukha TV\n\n");
passOne(argv[1]);
checkError(argv[1]); // check if there are any errors in the source code
length = LOCCTR - startAddr;
if(flag == 0) // perform pass two only if no errors are found
passTwo(argv[1]);
else
printf("\nAssembler Terminated!\n");
printf("\n**********************************************************************************\n\n");
return 0;
}
