Garbage summative assignment.

piller.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

char* file_to_string(FILE *fp);
int count_delim(char *str);
void tokenize(int *indices, char *str);
void isort(int* arr, int len);

#define F(x) void func_##x() {printf("In function %d\n",x);}
F(0);
F(1);
F(2);
F(3);
F(4);
F(5);
F(6);
F(7);
F(8);
F(9);

int main(int argc, char **argv) {
	
	FILE *fp = fopen("file.txt", "r");
	if(fp == NULL) {
		fprintf(stderr, "Null file pointer");
		exit(-1);
	}

	char *file_content = file_to_string(fp);
	if(file_content == NULL) {
		fprintf(stderr, "Null file contents\n");
		exit(-1);
	}
	fclose(fp);

	int len = count_delim(file_content);
	int indices[len];
	tokenize(indices, file_content);
	free(file_content);

	void (*fptr[10])(void);
	fptr[0] = &func_0;
	fptr[1] = &func_1;
	fptr[2] = &func_2;
	fptr[3] = &func_3;
	fptr[4] = &func_4;
	fptr[5] = &func_5;
	fptr[6] = &func_6;
	fptr[7] = &func_7;
	fptr[8] = &func_8;
	fptr[9] = &func_9;

	for(int i = 0; i < len; i++) {
		fptr[indices[i]]();
	}

	return 0;
}

int count_delim(char *str) {
	int i;
	int count = 0;
	int size = strlen(str);

	for(i = 0; i < size; i++) {
		if(str[i] == ',') {
			count++;
		}
	}
	return count;
}

char* file_to_string(FILE *fp) {
	char *buffer = NULL;

	if (fseek(fp, 0L, SEEK_END) == 0) {
		long buf_size = ftell(fp);
		if (buf_size == -1) {/*error*/}

		buffer = (char *) malloc(sizeof(char) * (buf_size + 1));
		if(buffer == NULL) {/*error*/}

		if (fseek(fp, 0L, SEEK_SET) == 0) {/*error */}

		size_t new_len = fread(buffer, sizeof(char), buf_size, fp);
		if (new_len == 0) {
			//error
		} else {
			buffer[new_len + 1] = '\0'; /* Just to be safe. */
		}
	}

	return buffer;
}

void tokenize(int *indices, char *str) {
	char *token;
	int i = 0;
	
	token = strtok(str, ",");
	while(token != NULL) {
		indices[i] = atoi(token);
		i++;

		token = strtok(NULL, ",");
	}
}