add human.c, really early stages

master
karchnu 8 years ago
parent fca19a877f
commit 5cb230bd63

@ -0,0 +1,216 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define ARGUMENTS "d:f:"
struct fields
{
int nbfields;
unsigned int *fields;
};
void
chomp (const char *s)
{
char *p;
while (NULL != s && NULL != (p = strrchr(s, '\n'))) {
*p = '\0';
}
} /* chomp */
int
human (const char *s, char *stmp, ssize_t bufsize)
{
unsigned long long int val = strtoull(s, NULL, 10);
char suf = ' ';
if(val > 1000) {
val /= 1000;
suf = 'k';
}
if(val > 1000) {
val /= 1000;
suf = 'M';
}
if(val > 1000) {
val /= 1000;
suf = 'M';
}
if(val > 1000) {
val /= 1000;
suf = 'G';
}
if(val > 1000) {
val /= 1000;
suf = 'T';
}
if(val > 1000) {
val /= 1000;
suf = 'P';
}
if(val > 1000) {
val /= 1000;
suf = 'E';
}
if(val > 1000) {
val /= 1000;
suf = 'Z';
}
if(val > 1000) {
val /= 1000;
suf = 'Y';
}
snprintf(stmp, bufsize, "%llu %co", val, suf);
return EXIT_SUCCESS;
}
void
print_token_to_human (const char *token)
{
char *stmp = malloc(BUFSIZ);
if(stmp != 0) {
int ret = human(token, stmp, BUFSIZ);
printf("%s ", stmp);
free(stmp);
}
}
void
print_delim (char *s, const char *delim, const struct fields *f)
{
char *token, *saveptr;
char *str;
int i, j;
// printf("%d fields :: ", f->nbfields);
// for( i = 0 ; i < f->nbfields ; i++) {
// printf("%u, ", f->fields[i]);
// }
// printf("\n");
for (str = s, i = 1; ; str = NULL, i++) {
token = strtok_r(str, delim, &saveptr);
if (token == NULL)
break;
// check if we need to print the current token humanized
int found = 0;
for (j = 0 ; j < f->nbfields ; j++ ) {
if( i == f->fields[j] ) {
print_token_to_human(token);
found = 1;
break;
}
}
// print the current token not humanized
if (found == 0) {
printf("%s ", token);
}
}
}
/*
* print every line, with the first token humanized
* there is a split in the line by the space character to get tokens
*/
void
print_human (char *s)
{
struct fields f;
f.nbfields = 1;
f.fields = malloc(sizeof(unsigned int) * 1);
f.fields[0] = 1;
print_delim (s, " ", &f);
}
// get the index of every token to humanize
int
get_tok_to_humanize (char *s, struct fields *f)
{
if(f == NULL || s == NULL) {
return 1;
}
char *str = NULL;
char *token = NULL, *saveptr = NULL;
f->nbfields = 0;
// counts the number of fields
char * strtmp = s;
while(*strtmp++ != '\0') {
if (*strtmp == ',')
f->nbfields++;
}
f->nbfields++;
f->fields = (unsigned int *) malloc(sizeof(unsigned int) * f->nbfields);
int i;
for (str = s, i = 0; ; str = NULL, i++) {
token = strtok_r(str, ",", &saveptr);
if (token == NULL)
break;
f->fields[i] = atoi(token);
}
return 0;
}
int
main (int argc, char *argv[])
{
char *strtmp = malloc(BUFSIZ);
char *delim = NULL; // options
struct fields fields;
if(argc < 1 || argc > 3) {
fprintf(stderr, "Usage: %s [fields [delim]]\n", argv[0]);
exit(EXIT_FAILURE);
}
int ret ;
switch (argc) {
case 3 :
ret = get_tok_to_humanize(argv[1], &fields);
delim = argv[2];
break;
case 2 :
ret = get_tok_to_humanize(argv[1], &fields);
delim = (char *) malloc(1);
*delim = ' ';
break;
}
while(fgets(strtmp, BUFSIZ, stdin)) {
chomp(strtmp);
if(delim) {
print_delim (strtmp, delim, &fields);
}
else {
print_human (strtmp);
}
printf("\n");
}
free(strtmp);
exit(EXIT_SUCCESS);
}
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