Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
Benchmarking tool for sort function
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
void sort(const char **strings, size_t count, const char **out);
/* Macros grabbed from my darray module:
* http://ccan.ozlabs.org/info/darray.html */
#define darray(type) struct {type *item; size_t size; size_t alloc;}
#define darray_new() {0,0,0}
#define darray_append(arr, ...) do { \
darray_resize(arr, (arr).size+1); \
(arr).item[(arr).size-1] = (__VA_ARGS__); \
} while(0)
#define darray_resize(arr, newSize) darray_growalloc(arr, (arr).size = (newSize))
#define darray_realloc(arr, newAlloc) do { \
(arr).item = realloc((arr).item, ((arr).alloc = (newAlloc)) * sizeof(*(arr).item)); \
} while(0)
#define darray_growalloc(arr, need) do { \
size_t __need = (need); \
if (__need > (arr).alloc) \
darray_realloc(arr, darray_next_alloc((arr).alloc, __need)); \
} while(0)
static inline size_t darray_next_alloc(size_t alloc, size_t need)
{
if (alloc == 0)
alloc = 1;
while (alloc < need)
alloc *= 2;
return alloc;
}
static char *chomp(const char *str)
{
size_t len;
char *ret;
len = strlen(str);
if (len > 0 && str[len-1] == '\n')
len--;
ret = malloc(len + 1);
memcpy(ret, str, len);
ret[len] = '\0';
return ret;
}
char **get_lines(size_t *count)
{
darray(char*) arr = darray_new();
char buffer[1024];
while (fgets(buffer, sizeof(buffer), stdin) != NULL)
darray_append(arr, chomp(buffer));
*count = arr.size;
return arr.item;
}
int main(int argc, char *argv[])
{
char **lines;
const char **sorted;
size_t count;
size_t i;
int sort_count;
int j;
if (argc > 1)
sort_count = atoi(argv[1]);
else
sort_count = 1;
fprintf(stderr, "Reading lines\n");
lines = get_lines(&count);
sorted = malloc(count * sizeof(*sorted));
fprintf(stderr, "Sorting\n");
for (j = 0; j < sort_count; j++)
sort((const char **)lines, count, sorted);
fprintf(stderr, "Printing\n");
for (i = 0; i < count; i++)
puts(sorted[i]);
fprintf(stderr, "Freeing\n");
for (i = 0; i < count; i++)
free(lines[i]);
free(lines);
free(sorted);
fprintf(stderr, "Done.\n");
return 0;
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.