Implement the basic binary operations for test(1)

This commit is contained in:
sin 2013-10-15 14:30:14 +01:00
parent d8718d4159
commit 8617b29355

38
test.c
View File

@ -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, STRNE } 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 STRNE:
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;
}