/prog/ - Optimized version of leftpad in plain C

Name: Anonymous 2016-03-23 21:32

#include <string.h>

static const char*
string_add(const char* first, const char* second)
 {
  const char* result = malloc(strlen(first) + strlen(second) + 1);
  strcat(result, first);
  strcat(result, second);
  return result;
 }

const char*
leftpad(const char* str, size_t len, char ch)
 {
  int i = -1;

  if (ch == 0) ch = ' ';

  int len = strlen(str);

  while (++i < len) {
    char buf[2] = { 0 };
    buf[0] = ch;
    str = string_add(buf, str);
  }

  return str;
 }

Optimized version of leftpad in plain C

1 Name: Anonymous 2016-03-23 21:32

62 Name: Anonymous 2016-04-13 22:42

Name: Anonymous 2016-03-23 21:32

Name: Anonymous 2016-04-13 22:42