From 4c31a79f1f76b6d80fffd05180dadcbb5a882293 Mon Sep 17 00:00:00 2001
From: Brian Cully <bjc@kublai.com>
Date: Sun, 2 Mar 2008 11:44:52 -0500
Subject: Move logger/io routines to separate modules.

---
 src/Makefile   |  2 +-
 src/io.c       | 55 +++++++++++++++++++++++++++++++++++++
 src/io.h       |  9 ++++++
 src/log.c      | 37 +++++++++++++++++++++++++
 src/log.h      |  8 ++++++
 src/mysqlerl.c | 87 ++--------------------------------------------------------
 6 files changed, 113 insertions(+), 85 deletions(-)
 create mode 100644 src/io.c
 create mode 100644 src/io.h
 create mode 100644 src/log.c
 create mode 100644 src/log.h

diff --git a/src/Makefile b/src/Makefile
index 4224443..5a9287d 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -10,7 +10,7 @@ PRIVDIR =	../priv
 BEAMDIR =	../ebin
 
 BINS =		$(PRIVDIR)/mysqlerl $(BEAMDIR)/mysqlerl.app
-MYSQLERLOBJS =	mysqlerl.o
+MYSQLERLOBJS =	io.o log.o mysqlerl.o
 BEAMS =		mysqlerl.beam mysqlerl_app.beam mysqlerl_connection.beam \
 		mysqlerl_connection_sup.beam
 LIBS =		-lmysqlclient
diff --git a/src/io.c b/src/io.c
new file mode 100644
index 0000000..e255f61
--- /dev/null
+++ b/src/io.c
@@ -0,0 +1,55 @@
+#include "io.h"
+#include "log.h"
+
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <unistd.h>
+
+int
+restartable_read(unsigned char *buf, size_t buflen)
+{
+  ssize_t rc, readb;
+
+  rc = 0;
+  READLOOP:
+  while (rc < buflen) {
+    readb = read(STDIN_FILENO, buf + rc, buflen - rc);
+    if (readb == -1) {
+      if (errno == EAGAIN || errno == EINTR)
+        goto READLOOP;
+
+      return -1;
+    } else if (readb == 0) {
+      logmsg("ERROR: EOF trying to read additional %d bytes from "
+             "standard input", buflen - rc);
+      return -1;
+    }
+
+    rc += readb;
+  }
+
+  return rc;
+}
+
+int
+restartable_write(const unsigned char *buf, size_t buflen)
+{
+  ssize_t rc, wroteb;
+
+  rc = 0;
+  WRITELOOP:
+  while (rc < buflen) {
+    wroteb = write(STDOUT_FILENO, buf + rc, buflen - rc);
+    if (wroteb == -1) {
+      if (errno == EAGAIN || errno == EINTR)
+        goto WRITELOOP;
+
+      return -1;
+    }
+
+    rc += wroteb;
+  }
+
+  return rc;
+}
diff --git a/src/io.h b/src/io.h
new file mode 100644
index 0000000..0db889b
--- /dev/null
+++ b/src/io.h
@@ -0,0 +1,9 @@
+#ifndef _IO_H
+#define _IO_H
+
+#include <sys/types.h>
+
+int restartable_read(unsigned char *buf, size_t buflen);
+int restartable_write(const unsigned char *buf, size_t buflen);
+
+#endif
diff --git a/src/log.c b/src/log.c
new file mode 100644
index 0000000..76ba469
--- /dev/null
+++ b/src/log.c
@@ -0,0 +1,37 @@
+#include "log.h"
+
+#include <stdio.h>
+#include <stdarg.h>
+
+const char *LOGPATH = "/tmp/mysqlerl.log";
+static FILE *logfile = NULL;
+
+void
+openlog()
+{
+  logfile = fopen(LOGPATH, "a");
+}
+
+void
+closelog()
+{
+  fclose(logfile);
+}
+
+void
+logmsg(const char *format, ...)
+{
+  FILE *out = logfile;
+  va_list args;
+
+  if (logfile == NULL)
+    out = stderr;
+
+  va_start(args, format);
+  (void)vfprintf(out, format, args);
+  (void)fprintf(out, "\n");
+  va_end(args);
+
+  fflush(out);
+}
+
diff --git a/src/log.h b/src/log.h
new file mode 100644
index 0000000..d09ca00
--- /dev/null
+++ b/src/log.h
@@ -0,0 +1,8 @@
+#ifndef _LOG_H
+#define _LOG_H
+
+void openlog();
+void closelog();
+void logmsg(const char *format, ...);
+
+#endif
diff --git a/src/mysqlerl.c b/src/mysqlerl.c
index 9266baa..b0bbc87 100644
--- a/src/mysqlerl.c
+++ b/src/mysqlerl.c
@@ -4,20 +4,16 @@
  * Copyright (C) 2008, Brian Cully <bjc@kublai.com>
  */
 
+#include "io.h"
+#include "log.h"
+
 #include <erl_interface.h>
 #include <ei.h>
 #include <mysql.h>
 
 #include <errno.h>
-#include <stdio.h>
-#include <stdarg.h>
 #include <stdlib.h>
 #include <string.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-const char *LOGPATH = "/tmp/mysqlerl.log";
-static FILE *logfile = NULL;
 
 const char *QUERY_MSG = "sql_query";
 
@@ -29,83 +25,6 @@ struct msg {
 };
 typedef struct msg msg_t;
 
-void
-openlog()
-{
-  logfile = fopen(LOGPATH, "a");
-}
-
-void
-closelog()
-{
-  fclose(logfile);
-}
-
-void
-logmsg(const char *format, ...)
-{
-  FILE *out = logfile;
-  va_list args;
-
-  if (logfile == NULL)
-    out = stderr;
-
-  va_start(args, format);
-  (void)vfprintf(out, format, args);
-  (void)fprintf(out, "\n");
-  va_end(args);
-
-  fflush(out);
-}
-
-int
-restartable_read(unsigned char *buf, size_t buflen)
-{
-  ssize_t rc, readb;
-
-  rc = 0;
-  READLOOP:
-  while (rc < buflen) {
-    readb = read(STDIN_FILENO, buf + rc, buflen - rc);
-    if (readb == -1) {
-      if (errno == EAGAIN || errno == EINTR)
-        goto READLOOP;
-
-      return -1;
-    } else if (readb == 0) {
-      logmsg("ERROR: EOF trying to read additional %d bytes from "
-             "standard input", buflen - rc);
-      return -1;
-    }
-
-    rc += readb;
-  }
-
-  return rc;
-}
-
-int
-restartable_write(const unsigned char *buf, size_t buflen)
-{
-  ssize_t rc, wroteb;
-
-  rc = 0;
-  WRITELOOP:
-  while (rc < buflen) {
-    wroteb = write(STDOUT_FILENO, buf + rc, buflen - rc);
-    if (wroteb == -1) {
-      if (errno == EAGAIN || errno == EINTR)
-        goto WRITELOOP;
-
-      return -1;
-    }
-
-    rc += wroteb;
-  }
-
-  return rc;
-}
-
 msg_t *
 read_msg()
 {
-- 
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