#include <stdio.h>
#include "optlist.h"
#include "tel.h"
+#include "prototypes.h"
char *
mailbox(char *buf, natid cn)
sprintf(buf, "%s/tel%d", teldir, cn);
return buf;
}
+
+/*
+ * Read telegram header from FP into TEL.
+ * MBOX is the file name, it is used for logging errors.
+ * Return 1 on success, 0 on EOF, -1 on error.
+ */
+int
+tel_read_header(FILE *fp, char *mbox, struct telstr *tel)
+{
+ size_t n;
+
+ n = fread(tel, 1, sizeof(*tel), fp);
+ if (n == 0 && feof(fp))
+ return 0;
+ if (n != sizeof(*tel)
+ || tel->tel_type > TEL_LAST || tel->tel_from > MAXNOC) {
+ logerror("Mailbox %s corrupt: bad header", mbox);
+ return -1;
+ }
+ return 1;
+}
+
+/*
+ * Read telegram body from FP.
+ * MBOX is the file name, it is used for logging errors.
+ * TEL is the header.
+ * Unless SINK is null, it is called like SINK(CHUNK, SZ, ARG) to
+ * consume the body, chunk by chunk. The chunks are UTF-8, and
+ * CHUNK[SZ} is 0. Reading fails when SINK() returns a negative
+ * value.
+ * Return 0 on success, -1 on failure.
+ */
+int
+tel_read_body(FILE *fp, char *mbox, struct telstr *tel,
+ int (*sink)(char *, size_t, void *),
+ void *arg)
+{
+ char buf[4096];
+ size_t left, sz;
+
+ left = tel->tel_length;
+ while (left) {
+ sz = MIN(left, sizeof(buf) - 1);
+ if (fread(buf, 1, sz, fp) != sz) {
+ logerror("Mailbox %s corrupt: can't read body", mbox);
+ return -1;
+ }
+ buf[sz] = 0;
+ if (sink && sink(buf, sz, arg) < 0)
+ return -1;
+ left -= sz;
+ }
+ return 0;
+}