C 라이브러리

#define _UNICODE
#include <tchar.h>

int _tmain(int argc, LPTSTR argv[]) {
    ...
}


TCHAR, LPTSTR, LPCGSTR

_T("..."), TEXT("..."), _TEXT("...")

_stprintf()    // sprintf() // wsprintf()
_tstcpy()    // strcpy()
_itot()    // itoa()
_ttoi()
_tcsupr()  // _strupr, _wcsupr, _mbsupr
_tcslwr()  // _strlwr, _wcslwr, _mbslwr
_totuppper()
_totlower()
_tcscmp()
_tcscmpi()
_tsetlocale()
_tcsstr()  // strstr, wcsstr, _mbsstr
_memtchr() // memchr

_tcscpy() // strcpy() // lstrcpy()
_tcscpy_s()
_tcscpy_s<>()

strncmp()
_strnicmp()
memcmp()
memset()

로케일 고려

lstrcmp()
lstrcmpi()
CharUpper()
IsCharAlphaNumeric()
CompareString()
MultiByteToWideChar()

strcoll()

_tstrrchr() // strrchr()
_vsnprintf()
vsprintf()
strtok()

memcpy()
memmove()

isdigit()

문자열 치환

char *replaceAll(const char *s, const char *olds, const char *news)
{
    if (NULL == s) return NULL;

  char *result, *sr;
  size_t i, count = 0;
  size_t oldlen = strlen(olds);
  if (oldlen < 1) {
      return strdup(s);
  }
  size_t newlen = strlen(news);

  if (newlen != oldlen) {
    for (i = 0; s[i] != '\0';) {
      if (memcmp(&s[i], olds, oldlen) == 0) count++, i += oldlen;
      else i++;
    }
  } else
      i = strlen(s);

  result = (char *) malloc(i + 1 + count * (newlen - oldlen));
  if (result == NULL) return NULL;

  sr = result;
  while (*s) {
    if (memcmp(s, olds, oldlen) == 0) {
      memcpy(sr, news, newlen);
      sr += newlen;
      s  += oldlen;
    } else *sr++ = *s++;
  }
  *sr = '\0';

  return result;
}

char *replaceAll2(const char *s, const char *olds, const char *news)
{
    if (NULL == s) return NULL;

  char *result, *sr;
  size_t i, count = 0;
  size_t oldlen2 = strlen(olds);
  if (oldlen2 < 1) {
      return strdup(s);
  }
  size_t newlen = strlen(news);

    int j;
    for (i = 0; s[i] != '\0'; i++) {
        for (j = 0; j < oldlen2; j++) {
            if (news[j] == s[i])
                count++;
        }
    }

  result = (char *) malloc(i + 1 + count * (newlen - 1));
  if (result == NULL) return NULL;

  memset(result, 0, i + 1 + count * (newlen - 1));
  sr = result;
  short bFound=0;
  while (*s) {
      bFound = 0;
    for (j = 0; j < oldlen2; j++) {
        if (news[j] == *s) {
          memcpy(sr, news, newlen);
          sr += newlen;
          s++;

          bFound = 1;
          break;
        }
    }
    if (!bFound)
        *sr++ = *s++;
  }
  *sr = '\0';

  return result;
}

진법 지정 인수가 있다.

itoa()

strtoul()

#include <stdio.h>

void FormattedTextOut(HDC hDC, int x, int y, LPCTSTR fmt, ...)
{
     char buf[2048];
      va_list vlist;
      va_start(vlist, fmt);
    int nRet = _vsnprintf(buf, sizeof(buf), fmt, vlist);   /* this is safe */
//    int nRet = vsprintf(buf, fmt, vlist);                 /* this is not safe */
      va_end(vlist);

      if (0 <= nRet)
          ::TextOut(hDC, x, y, buf, lstrlen(buf));
}

참조 사이트:

http://msdn.microsoft.com/en-us/library/td1esda9(VS.80).aspx

http://forum.falinux.com/zbxe/?mid=C_LIB&page=10&document_srl=408111
http://blog.naver.com/PostView.nhn?blogId=drvoss&logNo=20059148948
http://mwultong.blogspot.com/2006/10/c-string-replace-all.html
http://forum.falinux.com/zbxe/?document_srl=408052
http://forum.falinux.com/zbxe/?document_srl=408126&mid=C_LIB&sort_index=readed_count&order_type=desc
http://jjjryu.tistory.com/entry/%EC%9D%BC%EB%B0%98%EC%A0%81-%EB%AC%B8%EC%9E%90generic-characters