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Diffstat (limited to 'src/lib/libast/string/strvcmp.c')
| -rw-r--r-- | src/lib/libast/string/strvcmp.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/src/lib/libast/string/strvcmp.c b/src/lib/libast/string/strvcmp.c new file mode 100644 index 0000000..036460d --- /dev/null +++ b/src/lib/libast/string/strvcmp.c @@ -0,0 +1,74 @@ +/*********************************************************************** +* * +* This software is part of the ast package * +* Copyright (c) 1985-2011 AT&T Intellectual Property * +* and is licensed under the * +* Eclipse Public License, Version 1.0 * +* by AT&T Intellectual Property * +* * +* A copy of the License is available at * +* http://www.eclipse.org/org/documents/epl-v10.html * +* (with md5 checksum b35adb5213ca9657e911e9befb180842) * +* * +* Information and Software Systems Research * +* AT&T Research * +* Florham Park NJ * +* * +* Glenn Fowler <gsf@research.att.com> * +* David Korn <dgk@research.att.com> * +* Phong Vo <kpv@research.att.com> * +* * +***********************************************************************/ +#pragma prototyped + +#include <ast.h> +#include <ctype.h> + +/* + * version strcmp(3) + */ + +int +strvcmp(register const char* a, register const char* b) +{ + register unsigned long na; + register unsigned long nb; + + for (;;) + { + if (isdigit(*a) && isdigit(*b)) + { + na = nb = 0; + while (isdigit(*a)) + na = na * 10 + *a++ - '0'; + while (isdigit(*b)) + nb = nb * 10 + *b++ - '0'; + if (na < nb) + return -1; + if (na > nb) + return 1; + } + else if (*a != *b) + break; + else if (!*a) + return 0; + else + { + a++; + b++; + } + } + if (*a == 0) + return -1; + if (*b == 0) + return 1; + if (*a == '.') + return -1; + if (*b == '.') + return 1; + if (*a == '-') + return -1; + if (*b == '-') + return 1; + return *a < *b ? -1 : 1; +} |