/**
* "readInput(FILE *fp, char src[])"
* read each individual character into array passed from main
* input file will be then store for use by other functions
*
*/
void readInput(FILE *fp, char src[]){
int i = 0;
int c;
int rc = 0;
if (fp == NULL || src == NULL) {
//if the file pointer or the char array is null, return error
return;
}
// declare char array to store file input
// return to the begining of file reader pointer
rc = fseek(fp, 0L, SEEK_SET);
if (rc != 0) {
// error ocurred
fileReadError(FNS[input_txt], input_txt);
// this is a fatal error
printError(err27, FNS[input_txt]);
exit(EXIT_FAILURE);
}
// store each character into -array passed- from main
while ( (c = fgetc(fp)) != EOF ){
src[i++] = c;
}
return;
}
extern char* fileReadToBuffer(char* filePath) {
FILE* file = fileOpen(filePath);
int fileLength = fileGetLength(file);
char* fileBuffer = (char*) malloc(sizeof(char) * (fileLength + 1));
fileBuffer[fileLength] = '\0';
int bytesRead = fread(fileBuffer, 1, fileLength, file);
if (bytesRead == -1) {
fileReadError(filePath);
}
fclose(file);
return fileBuffer;
}
/*
* "createFilePointers()"
* create all the file pointers and initialize them
* file pointers are stored in an array for global use
* handle null pointer exeptions immediatly
*/
void createFilePointers(){
char *mode = "r";
int i = 0;
for (i = 0; i < MAX_FILES; i++) {
// initialize the file pointer array index
m_FPS[i] = NULL;
if (i) {
mode = "w";
}
// if file pointer fails to open filename
// then a null is stored into array
FILE *fp = NULL;
fp = fopen(FNS[i], mode);
if (fp == NULL) {
fileReadError(FNS[i], i);
}
m_FPS[i] = fp;
}
}
// -----------------Initial call to program -----------------
int main(int argc, char *argv[]) {
// if a file name for input is passed
// use that name instead of the default in
// FNS[0] = input.txt
int i = 0;
if(argc > 1) {
FNS[input_txt] = argv[1];
}
// create file pointers for input output
// createFilePointers handles null pointer exception
createFilePointers();
// copy input file pointer
FILE *ifp = m_FPS[input_txt];
// copy clean input file pointer
FILE *cifp = m_FPS[cleaninput_txt];
// how many characters in file
int count = charCount(ifp);
if (count < 0) {
fileReadError(FNS[input_txt], input_txt);
// this is fatal error
exit(EXIT_FAILURE);
}
char code[count];
// cleanCode will have input without comments
char cleanCode[count];
// initialize code arrays
for (i = 0; i < count; i++) {
code[i] = ' ';
cleanCode[i] = ' ';
}
// read input file into array code[]
readInput(ifp, code);
// close the input file
fclose(ifp);
// remove comments from input
//cleanCode[] will contain -comments free- input
cleanInput(cifp, code, count, cleanCode);
// close the -clean input- file
fclose(cifp);
// there will be at most m_nCleanCount separate string tokens
char *caCleanInputTokens[m_nCleanCount];
// separate cleanCode into tokens, allocate space as needed with calloc
// need to free each caCleanInputTokens[] array index that calloc was done to
// if caCleanInputTokens[] is not null, free it before exiting program
// or after printing it to file
splitInputTokens(cleanCode, caCleanInputTokens);
// there will be at most m_nCleanCount separate namerecord_t tokens
namerecord_t namerecord_table[m_nCleanCount];
initializeNamerecord_table(namerecord_table);
// identify what kind of lexeme each token is
IdentifyInputToken(caCleanInputTokens, namerecord_table);
// print each record to both lexemelist.txt and lexemetable.txt
printNamerecord_table(namerecord_table);
// call freeInputTokenCalloc after finishing the use of the array
freeInputTokenCalloc(caCleanInputTokens);
// program finished, if no error were found, it will reach this point
printf("\nYou can find the input/ output files: \n");
for (i = 0; i < MAX_FILES; i++) {
// print the file names that were used and created
printf("%s \n", FNS[i]);
}
printf("in the same folder where scanner.c is located \n\n");
return 0;
}