/******************************************************************
* Program: writetest.c                                            *
*          This program writes another program called timetest.c  *
*          It's a little hard to read, so bear with me. I've      *
*          added comments between the code being written by the   *
*          program and the code of the program itself, so         *
*          hopefully that helps a bit.                            *
*                                                                 *
* Author: Benjamin Bartlett, Drawer 425, x2021,                   * 
*         bartlbe@earlham.edu                                     *
*******************************************************************/

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

int main() {
    FILE *fp = fopen("timetest.c", "w");
    FILE *infile = fopen("tests.txt", "r");
    int i = 1;
    int nloops;
    char s[128], num[128];

    s[0] = '\0';

    fprintf(fp, "
/* Program being written */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include \"useinfo.h\"

#define MAXLOOPS 1000000

int sum1(int i2) {
    return i2;
}

int sum2(int i2, int i3) {
    return i2 + i3;
}

int sum3(int i2, int i3, int i4) {
    return i2 + i3 + i4;
}

int main() {
    int i;
    int i1 = 1, i2 = 2, i3 = 3, i4 = 4;
    float f1 = 1.1, f2 = 2.2, f3 = 3.3;
    double d1 = 1.11, d2 = 2.22, d3 = 3.33;
    int v[MAXLOOPS];
    double utime, stime, wtime, atime;
    struct rusage *info1, *info2;
    char s[228] = \"Hello world\\n\";
    FILE *fp = fopen(\"t.t\", \"wr\");\n");

/* This program */
    while(1) {
        fgets(s, sizeof(s), infile);
        if(strcmp(s, "exit\n") == 0) break;
        fgets(num, sizeof(num), infile);
        nloops = atoi(num);
        fprintf(fp, "\n
/* Program being written */
    get_usage_info(&info1);
    for(i = 0; i < %d; i++);
    get_usage_info(&info2);
    
    utime = user_time_info(info1, info2);   
    stime = system_time_info(info1, info2); 
    atime = (double) (utime + stime);

    free(info1);
    free(info2);

    rewind(fp);
    get_usage_info(&info1);
    for(i = 0; i < %d; i++) {
    %s    }
    get_usage_info(&info2);

    utime = user_time_info(info1, info2);
    stime = system_time_info(info1, info2);
    wtime = (double) (utime + stime - atime)/%d;

    printf(\"%d: %%f\\n\", wtime);
    free(info1);
    free(info2);\n", nloops, nloops, s, nloops, i);
    i++;
    }

/* This program */
    fprintf(fp, "\n    exit(0);\n");
    fprintf(fp, "}\n");

    fclose(fp);

    exit(0);
}