Minor cosmetics, typos, and so on.

README

@@ -1,6 +1,6 @@
-----------------------------------------------------------------
+-------------------------------------------------------------------------------
 libserialport: cross-platform library for accessing serial ports
-----------------------------------------------------------------
+-------------------------------------------------------------------------------
 
 libserialport is a minimal library written in C that is intended to take care
 of the OS-specific details when writing software that uses serial ports.
@@ -75,7 +75,7 @@ can be obtained by calling sp_last_error_code() or sp_last_error_message(). The
 error code or message is that provided by the OS; libserialport does not define
 any error codes or messages of its own.
 
-Functions calls that succeed return SP_OK, which is equal to zero, or where
+Function calls that succeed return SP_OK, which is equal to zero, or where
 otherwise documented a positive value.
 
 The available functions are as follows:

configure.ac

@@ -58,6 +58,7 @@ AM_PROG_CC_C_O
 LT_INIT
 
 # Initialize pkg-config.
+# We require at least 0.22, as "Requires.private" behaviour changed there.
 PKG_PROG_PKG_CONFIG([0.22])
 
 # Library version for libserialport (NOT the same as the package version).
@@ -76,11 +77,13 @@ AC_SUBST(SP_LIB_VERSION)
 AC_SUBST(SP_LIB_LDFLAGS)
 
 # Checks for header files.
-# These are already checked: inttypes.h stdint.h stdlib.h string.h unistd.h.
-AC_CHECK_HEADERS([sys/types.h sys/stat.h fcntl.h termios.h sys/ioctl.h errno.h])
+# These are already checked: inttypes.h dlfcn.h memory.h stdint.h stdlib.h
+# string.h strings.h sys/types.h sys/stat.h unistd.h
+AC_CHECK_HEADERS([errno.h fcntl.h stddef.h sys/ioctl.h termios.h])
 
 case $target_os in
 *linux*)
+	# On Linux libudev is currently a hard requirement.
 	PKG_CHECK_MODULES([libudev], [libudev >= 0],
 		[CFLAGS="$CFLAGS $libudev_CFLAGS"; LIBS="$LIBS $libudev_LIBS"],
 		[AC_MSG_ERROR([libudev.h not found])])

libserialport.h

@@ -17,8 +17,8 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef SERIALPORT_H
-#define SERIALPORT_H
+#ifndef LIBSERIALPORT_H
+#define LIBSERIALPORT_H
 
 #include <stddef.h>
 #ifdef _WIN32
@@ -46,7 +46,7 @@ enum {
 	/* A system error occured while executing the operation. */
 	SP_ERR_FAIL = -2,
 	/* A memory allocation failed while executing the operation. */
-	SP_ERR_MEM = -3
+	SP_ERR_MEM = -3,
 };
 
 /* Port access modes. */
@@ -56,7 +56,7 @@ enum {
 	/* Open port for read access only. */
 	SP_MODE_RDONLY = 2,
 	/* Open port in non-blocking mode. */
-	SP_MODE_NONBLOCK = 4
+	SP_MODE_NONBLOCK = 4,
 };
 
 /* Parity settings. */
@@ -66,7 +66,7 @@ enum {
 	/* Even parity. */
 	SP_PARITY_EVEN = 1,
 	/* Odd parity. */
-	SP_PARITY_ODD = 2
+	SP_PARITY_ODD = 2,
 };
 
 /* Flow control settings. */
@@ -76,7 +76,7 @@ enum {
 	/* Hardware (RTS/CTS) flow control. */
 	SP_FLOW_HARDWARE = 1,
 	/* Software (XON/XOFF) flow control. */
-	SP_FLOW_SOFTWARE = 2
+	SP_FLOW_SOFTWARE = 2,
 };
 
 int sp_get_port_by_name(const char *portname, struct sp_port **port_ptr);
@@ -95,4 +95,4 @@ int sp_last_error_code(void);
 char *sp_last_error_message(void);
 void sp_free_error_message(char *message);
 
-#endif /* SERIALPORT_H */
+#endif /* LIBSERIALPORT_H */

serialport.c

@@ -116,6 +116,7 @@ static struct sp_port **sp_list_append(struct sp_port **list, const char *portna
 {
 	void *tmp;
 	unsigned int count;
+
 	for (count = 0; list[count]; count++);
 	if (!(tmp = realloc(list, sizeof(struct sp_port *) * (count + 2))))
 		goto fail;
@@ -124,6 +125,7 @@ static struct sp_port **sp_list_append(struct sp_port **list, const char *portna
 		goto fail;
 	list[count + 1] = NULL;
 	return list;
+
 fail:
 	sp_free_port_list(list);
 	return NULL;
@@ -135,7 +137,7 @@ int sp_list_ports(struct sp_port ***list_ptr)
 	int ret = SP_OK;
 
 	if (!(list = malloc(sizeof(struct sp_port **))))
-		return SP_ERR_MEM;;
+		return SP_ERR_MEM;
 
 	list[0] = NULL;
 
@@ -343,6 +345,7 @@ out:
 void sp_free_port_list(struct sp_port **list)
 {
 	unsigned int i;
+
 	for (i = 0; list[i]; i++)
 		sp_free_port(list[i]);
 	free(list);
@@ -395,6 +398,7 @@ int sp_open(struct sp_port *port, int flags)
 		return SP_ERR_FAIL;
 #else
 	int flags_local = 0;
+
 	/* Map 'flags' to the OS-specific settings. */
 	if (flags & SP_MODE_RDWR)
 		flags_local |= O_RDWR;
@@ -452,6 +456,7 @@ int sp_write(struct sp_port *port, const void *buf, size_t count)
 
 #ifdef _WIN32
 	DWORD written = 0;
+
 	/* Returns non-zero upon success, 0 upon failure. */
 	if (WriteFile(port->hdl, buf, count, &written, NULL) == 0)
 		return SP_ERR_FAIL;
@@ -459,10 +464,11 @@ int sp_write(struct sp_port *port, const void *buf, size_t count)
 #else
 	/* Returns the number of bytes written, or -1 upon failure. */
 	ssize_t written = write(port->fd, buf, count);
+
 	if (written < 0)
 		return SP_ERR_FAIL;
 	else
-		return written;;
+		return written;
 #endif
 }
 
@@ -475,12 +481,14 @@ int sp_read(struct sp_port *port, void *buf, size_t count)
 
 #ifdef _WIN32
 	DWORD bytes_read = 0;
+
 	/* Returns non-zero upon success, 0 upon failure. */
 	if (ReadFile(port->hdl, buf, count, &bytes_read, NULL) == 0)
 		return SP_ERR_FAIL;
 	return bytes_read;
 #else
 	ssize_t bytes_read;
+
 	/* Returns the number of bytes read, or -1 upon failure. */
 	if ((bytes_read = read(port->fd, buf, count)) < 0)
 		return SP_ERR_FAIL;