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utils.c
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utils.c
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#include "utils.h"
/*http://stackoverflow.com/questions/779875/what-is-the-function-to-replace-string-in-c
* Function returns NULL when there is no replacement to be made.
*/
char *str_replace(char *orig, char *rep, char *with)
{
char *result; // the return string
char *ins; // the next insert point
char *tmp; // varies
int len_rep; // length of rep
int len_with; // length of with
int len_front; // distance between rep and end of last rep
int count; // number of replacements
// cout<<"woah boy replacing "<<rep<<" with "<<with;
if (!orig)
{
// printf(" not found 1\n");
return NULL;
}
if (!rep || !(len_rep = strlen(rep)))
{
// printf(" not found 2 \n");
return NULL;
}
if (!(ins = strstr(orig, rep)))
{
// printf(" not found 3\n");
return NULL;
}
if (!with)
with[0] = '\0';
len_with = strlen(with);
tmp = strstr(ins, rep);
for (count = 0; tmp; ++count)
{
ins = tmp + len_rep;
tmp = strstr(ins, rep);
}
// first time through the loop, all the variable are set correctly
// from here on,
// tmp points to the end of the result string
// ins points to the next occurrence of rep in orig
// orig points to the remainder of orig after "end of rep"
tmp = result = (char *)malloc(strlen(orig) + (len_with - len_rep) * count + 1);
if (!result)
{
//printf(" not found \n");
return NULL;
}
while (count--)
{
ins = strstr(orig, rep);
len_front = ins - orig;
tmp = strncpy(tmp, orig, len_front) + len_front;
tmp = strcpy(tmp, with) + len_with;
orig += len_front + len_rep; // move to next "end of rep"
}
strcpy(tmp, orig);
// cout<<" done "<<endl;
return result;
}
float get_duration(char *dur)
{
float hour, min, sec;
char *tmp2, *tmp3;
tmp3 = dur;
tmp2 = strstr(tmp3, "H");
if (tmp2 == NULL)
hour = 0.0;
else
{
*tmp2 = '\0';
hour = atof(tmp3 + 2);
tmp3 = tmp2 + 1;
}
tmp2 = strstr(tmp3, "M");
if (tmp2 == NULL)
min = 0.0;
else
{
*tmp2 = '\0';
min = atof(tmp3);
tmp3 = tmp2 + 1;
}
tmp2 = strstr(tmp3, "S");
if (tmp2 == NULL)
sec = 0.0;
else
{
*tmp2 = '\0';
sec = atof(tmp3);
tmp3 = tmp2 + 1;
}
return (hour * 3600) + (min * 60) + sec;
}