char* string trim

gistfile1.c

// 去掉前部的
void ltrim(char *s)
{
    long l=0,p=0,k=0;
    l = strlen(s);
    if( l == 0 ) return;
    p = 0;
    while( s[p] == ' ' || s[p] == '\t' )  p++;
    if( p == 0 ) return;
    while( s[k] != '\0') s[k++] = s[p++];
    return;
}
// 去掉尾部的
void rtrim(char *s)
{
    long l=0,p=0;
    l = strlen(s);
    if( l == 0 ) return;
    p = l -1;
    while( s[p] == ' ' || s[p] == '\t' ) {
        s[p--] = '\0';
        if( p < 0 ) break;
    }
    return;
}