From bedd2e7ccb1595c23e159eaa952ae1b0b5a3d2ad Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Sat, 15 Mar 2014 01:49:50 +0100
Subject: Lean and mean initial commit

Not much functionality yet
---
 helper.c | 174 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 174 insertions(+)
 create mode 100644 helper.c

(limited to 'helper.c')

diff --git a/helper.c b/helper.c
new file mode 100644
index 0000000..1ba11b0
--- /dev/null
+++ b/helper.c
@@ -0,0 +1,174 @@
+#include "helper.h"
+#include <socket.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <fcntl.h>
+#include <stdarg.h>
+
+void bail(char *args, ...)
+{
+	printf("ERROR: ");
+	va_list argList;
+	va_start(argList, args);
+	vprintf(args, argList);
+	va_end(argList);
+	printf("\n");
+	exit(1);
+}
+
+/**
+ * 0 = SUCCESS, -1 = ERROR
+ * on success, memory pointer and size variable will be updated.
+ */
+int helper_realloc(char **memory, size_t *curSize, const size_t newSize, const char *location)
+{
+	void *newBlock = realloc(*memory, newSize);
+	if (newBlock == NULL) {
+		printf("OUT OF MEMORY when trying to realloc to %d bytes at %s\n", (int)newSize, location);
+		return -1;
+	}
+	*memory = newBlock;
+	if (curSize != NULL) *curSize = newSize;
+	return 0;
+}
+
+int helper_connect4(char *address, int port, char *ip)
+{
+	if (sizeof(struct in_addr) != 4) bail("Ach nöö ach nöö");
+	if (inet_pton(AF_INET, address, ip) == 1) {
+		const int sock = socket_tcp4b();
+		if (sock == -1) return -1;
+		if (socket_connect4(sock, ip, port) == 0) {
+			return sock;
+		}
+		close(sock);
+		return -1;
+	}
+	struct addrinfo hints;
+	struct addrinfo *result, *rp;
+	memset(&hints, 0, sizeof(struct addrinfo));
+	hints.ai_family = AF_INET;
+	hints.ai_socktype = SOCK_STREAM;
+	const int ret = getaddrinfo(NULL, address, &hints, &result);
+	if (ret != 0) {
+		fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(ret));
+		return -1;
+	}
+	for (rp = result; rp != NULL; rp = rp->ai_next) {
+		const int sock = socket_tcp4b();
+		if (sock == -1) continue;
+		memcpy(ip, rp->ai_addr->sa_data, 4);
+		if (socket_connect4(sock, ip, port) == 0) {
+			freeaddrinfo(result);
+			return sock; // Success
+		}
+		close(sock);
+	}
+	freeaddrinfo(result);
+	return -1;
+}
+
+void helper_nonblock(const int fd)
+{
+	fcntl(fd, F_SETFL, fcntl(fd, F_GETFL, 0) | O_NONBLOCK);
+}
+
+void helper_printava(struct AttributeValueAssertion* a,const char* rel)
+{
+	putchar('[');
+	printf("%.*s", (int)a->desc.l,a->desc.s);
+	putchar(' ');
+	printf("%s", rel);
+	putchar(' ');
+	printf("%.*s", (int)a->value.l,a->value.s);
+	putchar(']');
+}
+
+void helper_printal(struct AttributeDescriptionList* a)
+{
+	while (a) {
+		if (a->a.s && a->a.l) printf("%.*s", (int)a->a.l,a->a.s);
+		a=a->next;
+		if (a) {
+			putchar(',');
+		}
+	}
+	putchar('\n');
+}
+
+void helper_printfilter(struct Filter* f)
+{
+	switch (f->type) {
+	case AND:
+		printf("&(");
+mergesub:
+		helper_printfilter(f->x);
+		printf(")\n");
+		break;
+	case OR:
+		printf("|(");
+		goto mergesub;
+		break;
+	case NOT:
+		printf("!(");
+		goto mergesub;
+	case EQUAL:
+		helper_printava(&f->ava,"==");
+		break;
+	case SUBSTRING: {
+		struct Substring* s=f->substrings;
+		int first=1;
+		printf("%.*s",(int)f->ava.desc.l,f->ava.desc.s);
+		printf(" has ");
+		while (s) {
+			if (!first) {
+				printf(" and ");
+			}
+			first=0;
+			switch(s->substrtype) {
+			case prefix:
+				printf("prefix \"");
+				break;
+			case any:
+				printf("substr \"");
+				break;
+			case suffix:
+				printf("suffix \"");
+				break;
+			}
+			printf("%.*s",(int)s->s.l,s->s.s);
+			putchar('"');
+			s=s->next;
+		}
+	}
+	break;
+	case GREATEQUAL:
+		helper_printava(&f->ava,">=");
+		break;
+	case LESSEQUAL:
+		helper_printava(&f->ava,"<=");
+		break;
+	case PRESENT:
+		helper_printava(&f->ava,"\\exist");
+		break;
+	case APPROX:
+		helper_printava(&f->ava,"\\approx");
+		break;
+	case EXTENSIBLE:
+		printf("[extensible]");
+		break;
+	}
+	if (f->next) {
+		putchar(',');
+		helper_printfilter(f->next);
+	}
+	putchar('\n');
+	fflush(stdout);
+}
+
-- 
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