2 * Copyright (c) 1991, 1993
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5 * This code is derived from software contributed to Berkeley by
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36 * @(#)mystring.c 8.2 (Berkeley) 5/4/95
37 * $FreeBSD: src/bin/sh/mystring.c,v 1.14 2009/12/27 18:04:05 jilles Exp $
43 * equal(s1, s2) Return true if strings are equal.
44 * scopy(from, to) Copy a string.
45 * scopyn(from, to, n) Like scopy, but checks for overflow.
46 * number(s) Convert a string of digits to an integer.
47 * is_number(s) Return true if s is a string of digits.
57 char nullstr[1]; /* zero length string */
60 * equal - #defined in mystring.h
64 * scopy - #defined in mystring.h
69 * scopyn - copy a string from "from" to "to", truncating the string
70 * if necessary. "To" is always nul terminated, even if
71 * truncation is performed. "Size" is the size of "to".
75 scopyn(const char *from, char *to, int size)
79 if ((*to++ = *from++) == '\0')
87 * prefix -- see if pfx is a prefix of string.
91 prefix(const char *pfx, const char *string)
94 if (*pfx++ != *string++)
102 * Convert a string of digits to an integer, printing an error message on
107 number(const char *s)
110 error("Illegal number: %s", s);
117 * Check for a valid number. This should be elsewhere.
121 is_number(const char *p)
126 } while (*++p != '\0');