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main.c
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main.c
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#include "Project.h"
int main(int argc, char *argv[]) {
FILE *fp; /* Will point to the given file */
FILE *amFp; /* Will point to a new file that will contain the program after placing macros*/
FILE *extFp; /* Will point to a new file that will contain the externals output*/
FILE *obfile; /* Will point to a new file that will contain the object output*/
FILE *entFp; /* Will point to a new file that will contain the entry output*/
int fileIndex = START; /* Will be used for the index of the current file*/
char originalFileName[MAX_LINE_SIZE]; /* Will contain the file name without .as*/
char FileNameWithAm[MAX_LINE_SIZE]; /* Will contain the file name without .as with .am*/
char FileNameWithExt[MAX_LINE_SIZE]; /* Will contain the file name without .as with .ext*/
char FileNameWithObj[MAX_LINE_SIZE]; /* Will contain the file name without .as with .obj*/
char FileNameWithEnt[MAX_LINE_SIZE]; /* Will contain the file name without .as with .ent*/
char openingFileName[MAX_LINE_SIZE]; /* Will contain the file name with .as*/
int RAM[RAM_SIZE] = {ZERO}; /* The RAM memory */
int labelCount = ZERO; /* Will be used to count how many labels encountered */
label *labels; /*Will be used as a pointer to dynamically allocated array*/
int ICF = ZERO; /*Will be used to signal were the RAM memory use was ended*/
int firstPassStatus = ZERO; /*Will contain an int representing the status of the first pass*/
label *externs; /*Will be used as a pointer to dynamically allocated array*/
int externsCount = ZERO; /* W ill be used to count how many extern labels encountered */
int DCF = ZERO; /*Will hold the value of the final DC (DCF) from FirstPass */
int extFlag = ZERO; /*Will be used as an extern flag*/
int entryFlag = ZERO; /*Will be used as an entry flag*/
command commands[] = /* An array of structs representing an action and its numerical data */
{
{"mov", 0, 0},
{"cmp", 1, 0},
{"add", 2, 10},
{"sub", 2, 11},
{"lea", 4, 0},
{"clr", 5, 10},
{"not", 5, 11},
{"inc", 5, 12},
{"dec", 5, 13},
{"jmp", 9, 10},
{"bne", 9, 11},
{"jsr", 9, 12},
{"red", 12, 0},
{"prn", 13, 0},
{"rts", 14, 0},
{"stop", 15, 0}
};
/*
* An array of registers names
*/
char registerTable[MAX_LINE_SIZE][MAX_LINE_SIZE] =
{
"r0",
"r1",
"r2",
"r3",
"r4",
"r5",
"r6",
"r7",
"r8",
"r9",
"r10",
"r11",
"r12",
"r13",
"r14",
"r15",
};
if (argc < MIN_ARGUMENTS) /* If not enough arguments were given, will print an error and exit the program*/
{
puts("not enough arguments were given");
return EXIT;
}
/*
1. Opens a file
2. Gets his Macros
3. Copies the content to a new file and changes the macro contents
*/
for (fileIndex = LOOP_START; fileIndex < argc; fileIndex++) { /* Starts the loop */
externsCount = ZERO;/*Will reset externs count*/
labelCount = ZERO;/*Will reset label count*/
strcpy(originalFileName, argv[fileIndex]); /* Will copy the name of the current file */
strcpy(openingFileName, originalFileName); /* Will copy the name of the current file */
strcpy(FileNameWithAm, originalFileName); /* Will copy the name of the current file */
strcpy(FileNameWithExt, originalFileName); /* Will copy the name of the current file */
strcpy(FileNameWithObj, originalFileName); /* Will copy the name of the current file */
strcpy(FileNameWithEnt, originalFileName); /* Will copy the name of the current file */
strcat(openingFileName, ".as");
fp = fopen(openingFileName, "r+"); /* Opens the file */
amFp = fopen(strcat(FileNameWithAm, ".am"),
"w+"); /* Creates and opens a new file with the name of the old file + new */
if (fp == NULL) { /* If it wasn't able to open the file */
puts("wasn't able to open the current file, continue to the next file");
continue;
}
/*
The file opens successfully
*/
else {
if ((macrosDeploy(fp, amFp)) == FALSE) /* Will deploy all macros to newfp*/
{
exit(EXIT); /* Program should exit, wasn't able to deploy macros*/
}
fclose(fp); /* Closes the original file */
/*
* Macros have been deployed to the new file newfp!!!!
*/
firstPassStatus = firstPass(amFp, RAM, &labels, &labelCount, commands, registerTable, &DCF, &extFlag,&entryFlag);
/* Finished first pass over the code*/
if (firstPassStatus == FALSE) {
printf("Error was found in the first reading of the code, therefor will not continue to the second pass \n");
continue; /* Will continue to the next file*/
}
ICF = firstPassStatus; /* Will save the index where the RAM usage was ended*/
if (secondPass(amFp, RAM, &labels, labelCount, commands, registerTable, &externs, &externsCount) == MINUS_ONE)/*will do the second pass*/
{
continue;/* Will continue to the next file*/
}
/*second pass completed*/
if (extFlag == TRUE) {
extFp = fopen(strcat(FileNameWithExt, ".ext"),"w+"); /* Creates and opens a new file for the output extern file */
createExternFile(extFp, externs, externsCount); /* Creating the externals output file*/
}
obfile = fopen(strcat(FileNameWithObj, ".ob"),"w+"); /* Creates and opens a new file for the output object file */
createObjectFile(obfile, DCF, ICF, RAM);
if (entryFlag == TRUE) {
entFp = fopen(strcat(FileNameWithEnt, ".ent"),"w+"); /* Creates and opens a new file for the output entry file */
createEntryFile(entFp, &labels, labelCount); /*creating the externals output file */
} /* Creating the object output file */
}
free(labels);
free(externs);
fclose(amFp); /* Closes the second file */
fclose(extFp); /* Closes the extern file */
fclose(obfile); /* Closes the object file */
fclose(entFp); /* Closes the entry file */
}
return ZERO;
}