c常用字符实战操作

最新推荐文章于 2025-06-15 19:00:00 发布

转载最新推荐文章于 2025-06-15 19:00:00 发布 · 49 阅读

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原文链接：http://www.cnblogs.com/fx2008/archive/2011/10/14/2211993.html

//清空left空字符

static char * trim_left(char *buf)
{

int len,i;
char * tmp = NULL;

len = strlen(buf);
if(len==0)
{
  return buf;
}
tmp = (char*)malloc(len);
memset(tmp,0x00,len);
for(i = 0;i < len;i++)
{
  if (buf[i] !=' ')
  {
   break;
  }
}
if (i < len)
{
  strncpy(tmp,(buf+i),(len-i)); /*i is the number of space in the left*/
}
strncpy(buf,tmp,len);
free(tmp);
return buf;

}

//清空right空字符

static char * trim_right(char *buf)
{
int len,i;
char * tmp=NULL;

len = strlen(buf);
if(len==0)
{
  return buf;
}
tmp = (char*)malloc(len);
memset(tmp,0x00,len);
for(i = 0;i < len;i++)
{
  if (buf[len-i-1] !=' ')
  {
   break;
  }
}
if (i < len)
{
  strncpy(tmp,buf,len-i);
}
strncpy(buf,tmp,len);
free(tmp);
return buf;}

//清空空字符

static int getstr_trim(char *outstr, char *instr)
{
if ((NULL == outstr) || (NULL == instr))
{
  return NULL;
}
int i = 0;
char *tmp = instr;
while(*instr != ' ')
{
  i++;
  instr++;
}
memcpy(outstr, tmp, i);
return 0;
}

//清空指定字符

static int getstr_trimchar(char *instr, char trim_char)
{
char tmp_str[50];
if (NULL == instr)
{
  return D_FAILURE;
}
if (strlen(instr) > sizeof(tmp_str))
{
  return D_FAILURE;
}
int i = 0;
char *tmp = tmp_str;
strcpy(tmp_str,instr);

while(*instr)
{
  if(*tmp != trim_char)
  {
   *instr = *tmp;
   instr++;
  }
  tmp++;
}
*instr = '\0';
return D_SUCCESS;

}

转载于:https://www.cnblogs.com/fx2008/archive/2011/10/14/2211993.html