Date: 2007nov17
Language: C
Keywords: space, blank, tab, tabs, newline, newlines
Q. How do I remove the leading whitespace from a string?
A. Here's a pretty nice way to do it:
inline char *Shuffle(char *dest, const char *src)
{
return (char *) memmove(dest, src, strlen(src) + sizeof(char));
}
void TrimLeadingSpace(char *s)
{
while (isspace(*s))
{
Shuffle(s, s+1);
}
}
void TrimLeadingSpaceSlightlyFaster(char *s)
{
const char * p;
for (p = s; *p; p++)
{
if (!isspace(*p)) break;
}
Shuffle(s, p);
}
Example use:
main()
{
char buf[100] = " hello";
printf("before=>%s<\n", buf);
TrimLeadingSpace(buf);
printf(" after=>%s<\n", buf);
}
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