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strpos [2019/05/27 20:57] (current)
neils created
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 +====== STRPOS() ======
 +
 +Syntax:
 +
 +  strpos!(<​string pointer haystack>,​ <string pointer needle>)
 +  ​
 +The ''​STRPOS()''​ function searches for the string //needle// in the string //​haystack//​. If //needle// is found, the function returns the position of its first occurrence within //​haystack//​. If needle is not found, the function returns 255.
 +
 +**Important note**: if //needle// or //​haystack//​ are invalid strings, the function returns an undefined number or hangs execution. A string is considered to be invalid if it contains more than 255 consecutive bytes without a terminator (null byte). The longest valid string contains 255 bytes plus a null byte.
 +
 +Example:
 +
 +  a$ = "​xc-basic is cool"
 +  b$ = "​basic"​
 +  print strpos!(a$, b$)
 +  -- rem the above outputs 3