X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=src%2Fvercmp.c;fp=src%2Fvercmp.c;h=b0e5117b8e703384f89f65dee630ca7dea8e2566;hb=5dd3c3e64a9574112dda77a5afc167f5daa53fd8;hp=0000000000000000000000000000000000000000;hpb=bd21f0a1265b43ad5f05353a39db31c16826f05c;p=zpackage

diff --git a/src/vercmp.c b/src/vercmp.c
new file mode 100644
index 0000000..b0e5117
--- /dev/null
+++ b/src/vercmp.c
@@ -0,0 +1,111 @@
+#define _POSIX_C_SOURCE 2 
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#include <unistd.h>
+
+#include "zpm.h"
+
+/*
+ * -g greater than
+ * -l less than
+ * -e equal
+ * -L least : print least
+ * -G greatest : print greatest
+ * -q quiet: no print
+ */
+int main(int ac, char *av[]) {
+	int cmp;
+	char *a = 0, *b = 0;
+	int print = 1;
+	int argn, opt, pass, failed = 0;
+
+	/* 0x1 = less than, 0x2 = equal, 0x4 = greater */
+	unsigned testmask = 0;
+	unsigned testcases = 0;
+
+	char *greatest = 0;
+	char *least = 0;
+
+	if (ac < 2) return 1;
+
+	while ((opt = getopt(ac, av, "qgleLG")) != -1) {
+		switch (opt) {
+			case 'q': print = 0; break;
+			case 'l': testmask |= 0x1; break;
+			case 'e': testmask |= 0x2; break;
+			case 'g': testmask |= 0x4; break;
+			case 'L': print = 2; break;
+			case 'G': print = 3; break;
+			default:
+				  exit(EXIT_FAILURE);
+				  break;
+		}
+	}
+	argn = optind;
+
+	if (ac > argn) {
+		a = av[argn++];
+		greatest = a;
+		least = a;
+	}
+
+	while (ac > argn) {
+		b = av[argn++];
+
+		cmp = zpm_vercmp(a, b) + 1;
+		testcases |= (1<<cmp);
+		
+		if (testmask) {
+			pass = (testmask & (1 << cmp));
+			if (!pass) {
+				failed++;
+			}
+		}
+
+		cmp = zpm_vercmp(greatest, b);
+		if (cmp > 0) {
+			greatest = b;
+		}
+
+		cmp = zpm_vercmp(least, b);
+		if (cmp < 0) {
+			least = b;
+		}
+	}
+
+	switch (testcases) {
+		case 0: /* no tests */
+			cmp = 0; break;
+		case 1: /* only less than */
+			cmp = 2; break;
+		case 2: /* only equal */
+			cmp = 0; break;
+		case 4: /* only greater than */
+			cmp = 1; break;
+		default: /* mixed */
+			cmp = 3; break;
+	}
+
+	switch (print) {
+		case 1:
+			printf("%d\n", cmp == 2 ? -1 : cmp);
+			break;
+		case 2:
+			if (greatest) printf("%s\n", greatest);
+			break;
+		case 3:
+			if (least) printf("%s\n", least);
+			break;
+		default:
+			break;
+	}
+	fflush(stdout);
+
+	if (testmask == 0) {
+		return cmp;
+	} else {
+		return failed ? 1 : 0;
+	}
+}