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/* extstring.c
* SPDX-License-Identifier: BSD-3-Clause
*/
#define USE_SECURE_MEM
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "extlib.h"
char *
strlwr (char *s)
{
unsigned char *p = (unsigned char *) s;
while (*p) {
*p = tolower ((unsigned char)*p);
p++;
}
return s;
}
char *
strupr (char *s)
{
unsigned char *p = (unsigned char *) s;
while (*p) {
*p = toupper ((unsigned char)*p);
p++;
}
return s;
}
char *
trim (char *s, int *rem_front, int *rem_back)
{
char *result = strdup (s);
char *end;
while (isspace ((unsigned char)*result)) {
result++;
if (rem_front) *rem_front += 1;
}
if (*result == 0)
return result;
end = result + strlen (result) - 1;
while (end > result && isspace ((unsigned char)*end)) {
end--;
if (rem_back) *rem_back +=1;
}
end[1] = '\0';
return result;
}
char *
replace_str (char *s,
char *old,
char *replace)
{
char* result;
int i, cnt = 0;
size_t new_size = strlen (replace);
size_t old_size = strlen (old);
for (i = 0; s[i] != '\0'; i++) {
if (strstr (&s[i], old) == &s[i]) {
cnt++;
i += old_size - 1;
}
}
result = (char*)malloc_secure (i + cnt * (new_size - old_size) + 1);
i = 0;
while (*s) {
if (strstr (s, old) == s) {
strcpy (&result[i], replace);
i += new_size;
s += old_size;
}
else
result[i++] = *s++;
}
result[i] = '\0';
return result;
};
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