108 lines
2.7 KiB
C
108 lines
2.7 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include <getopt.h>
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#include <stdint.h>
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#include "cachelab.h"
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#define mprintf(...) if (VERBOSE) printf(__VA_ARGS__)
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void print_usage();
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size_t parse_int_arg(char *arg, char opt);
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/**
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If VERBOSE is non-zero, mprintf will not print. Otherwise, it will.
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Set in main().
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*/
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int8_t VERBOSE = 0;
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/* USURE. As defined in conference. */
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struct line_s {
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int8_t validity;
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int tag;
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};
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typedef struct line_s line;
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int main(int argc, char* argv[])
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{
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size_t set_index_bits = 0, lines = 0, block_bits = 0; // Useful variables.
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char *filename = NULL;
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int opt = 0, argflags = 0;
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while ((opt=getopt(argc, argv, "hvs:E:b:t:")) != -1) {
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switch (opt) {
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/* TODO: maybe add checking for optarg swallowing actual arguments. */
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case 'v':
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VERBOSE = 1;
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break;
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case 's': // 2^s = number of sets
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index_bits = parse_int_arg(optarg, 's');
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break;
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case 'E': // associativity - lines per set
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lines = parse_int_arg(optarg, 'E');
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break;
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case 'b': // 2^b = block size
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block_bits = parse_int_arg(optarg, 'b');
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break;
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case 't':
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filename = optarg;
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break;
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case 'h':
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print_usage();
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return 0;
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default:
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printf("Usage: ./csim [-hv] -s <number> -E <number> -b <number> -t <file>\n");
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return 1;
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}
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}
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/* If any required arguments were not provided. (argflags != 0b1111) */
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if (!index_bits || !lines || !block_bits || !filename) {
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printf("Usage: ./csim [-hv] -s <number> -E <number> -b <number> -t <file>\n");
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return 1;
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}
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/* End of argument parsing. */
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printf("Arguments: %zd, %zd, %zd, %hd, %s\n", index_bits, lines, block_bits, VERBOSE, filename);
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printSummary(0, 0, 0);
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return 0;
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}
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void print_usage()
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{
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printf("Usage: ./csim [-hv] -s <number> -E <number> -b <number> -t <file>\n"
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"Options:\n"
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" -h Print this help.\n"
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" -v Display trace info.\n"
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" -s <number> The number of set index bits. Must be a positive integer.\n"
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" -E <number> Associativity (lines per set). Must be a positive integer.\n"
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" -b <number> The number of block bits. Must be a positive integer.\n"
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" -t <file> Name of the file to read a valgrind trace from.");
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}
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/**
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Parses a string
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@param arg The string to parse.
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@param opt The option being parsed.
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@return The parsed integer if the argument was an integer.
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@note Exits if argument is invalid
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*/
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size_t parse_int_arg(char* arg, char opt)
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{
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char* end;
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long i = strtol(arg, &end, 0);
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if (!i || *end != '\0') {
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printf("Invalid argument \"%s\" for option -%c\n", arg, opt);
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printf("Usage: ./csim [-hv] -s <number> -E <number> -b <number> -t <file>\n");
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exit(1);
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}
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else if (i < 0) {
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printf("Argument %ld for option %c too small (must be greater than 0)", i, opt);
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exit(1);
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}
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else {
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return (size_t)i;
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}
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}
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