Implement the basic binary operations.
>From 7d5836d27ed1d1a1d4bbd0349946b99228e6102c Mon Sep 17 00:00:00 2001
From: sin <s...@2f30.org>
Date: Tue, 15 Oct 2013 14:30:14 +0100
Subject: [PATCH] Implement the basic binary operations for test(1)
---
test.c | 38 +++++++++++++++++++++++++++++++++++++-
1 file changed, 37 insertions(+), 1 deletion(-)
diff --git a/test.c b/test.c
index 0c5b969..a312839 100644
--- a/test.c
+++ b/test.c
@@ -105,7 +105,43 @@ unary(const char *op, const char *arg)
bool
binary(const char *arg1, const char *op, const char *arg2)
{
- eprintf("not yet implemented\n");
+ int i;
+ long narg1, narg2;
+ enum operator { EQ, GE, GT, LE, LT, NE, STREQ, STRNOTEQ } oper;
+ char *optexts[] = { "-eq", "-ge", "-gt", "-le", "-lt", "-ne",
+ "=", "!="
+ };
+
+ for (i = 0; i < LEN(optexts); i++) {
+ if (strcmp(op, optexts[i]) == 0) {
+ oper = i;
+ switch (oper) {
+ case STREQ:
+ return strcmp(arg1, arg2) == 0;
+ case STRNOTEQ:
+ return strcmp(arg1, arg2) != 0;
+ default:
+ narg1 = estrtol(arg1, 0);
+ narg2 = estrtol(arg2, 0);
+ switch (oper) {
+ case EQ:
+ return narg1 == narg2;
+ case GE:
+ return narg1 >= narg2;
+ case GT:
+ return narg1 > narg2;
+ case LE:
+ return narg1 <= narg2;
+ case LT:
+ return narg1 < narg2;
+ case NE:
+ return narg1 != narg2;
+ default:
+ usage();
+ }
+ }
+ }
+ }
return false;
}
--
1.7.10.4
