coding style: prototype of functions with no parameters

[openocd.git] / src / helper / log.c

diff --git a/src/helper/log.c b/src/helper/log.c
index c8a3a6c551d8fd0e4ead8c373c6f5b934172a45a..380f548f42ed49f824ebeab25b4c61e16b5afd18 100644 (file)
--- a/src/helper/log.c
+++ b/src/helper/log.c
@@ -61,46 +61,16 @@ static const char * const log_strings[6] = {
 
 static int count;
 
-static struct store_log_forward *log_head;
-static int log_forward_count;
-
-struct store_log_forward {
-       struct store_log_forward *next;
-       const char *file;
-       int line;
-       const char *function;
-       const char *string;
-};
-
-/* either forward the log to the listeners or store it for possible forwarding later */
+/* forward the log to the listeners */
 static void log_forward(const char *file, unsigned line, const char *function, const char *string)
 {
-       if (log_forward_count == 0) {
-               struct log_callback *cb, *next;
-               cb = log_callbacks;
-               /* DANGER!!!! the log callback can remove itself!!!! */
-               while (cb) {
-                       next = cb->next;
-                       cb->fn(cb->priv, file, line, function, string);
-                       cb = next;
-               }
-       } else {
-               struct store_log_forward *log = malloc(sizeof(struct store_log_forward));
-               log->file = strdup(file);
-               log->line = line;
-               log->function = strdup(function);
-               log->string = strdup(string);
-               log->next = NULL;
-               if (log_head == NULL)
-                       log_head = log;
-               else {
-                       /* append to tail */
-                       struct store_log_forward *t;
-                       t = log_head;
-                       while (t->next != NULL)
-                               t = t->next;
-                       t->next = log;
-               }
+       struct log_callback *cb, *next;
+       cb = log_callbacks;
+       /* DANGER!!!! the log callback can remove itself!!!! */
+       while (cb) {
+               next = cb->next;
+               cb->fn(cb->priv, file, line, function, string);
+               cb = next;
        }
 }
 
@@ -243,13 +213,22 @@ COMMAND_HANDLER(handle_debug_level_command)
        } else if (CMD_ARGC > 1)
                return ERROR_COMMAND_SYNTAX_ERROR;
 
-       command_print(CMD_CTX, "debug_level: %i", debug_level);
+       command_print(CMD, "debug_level: %i", debug_level);
 
        return ERROR_OK;
 }
 
 COMMAND_HANDLER(handle_log_output_command)
 {
+       if (CMD_ARGC == 0 || (CMD_ARGC == 1 && strcmp(CMD_ARGV[0], "default") == 0)) {
+               if (log_output != stderr && log_output != NULL) {
+                       /* Close previous log file, if it was open and wasn't stderr. */
+                       fclose(log_output);
+               }
+               log_output = stderr;
+               LOG_DEBUG("set log_output to default");
+               return ERROR_OK;
+       }
        if (CMD_ARGC == 1) {
                FILE *file = fopen(CMD_ARGV[0], "w");
                if (file == NULL) {
@@ -261,18 +240,20 @@ COMMAND_HANDLER(handle_log_output_command)
                        fclose(log_output);
                }
                log_output = file;
+               LOG_DEBUG("set log_output to \"%s\"", CMD_ARGV[0]);
+               return ERROR_OK;
        }
 
-       return ERROR_OK;
+       return ERROR_COMMAND_SYNTAX_ERROR;
 }
 
-static struct command_registration log_command_handlers[] = {
+static const struct command_registration log_command_handlers[] = {
        {
                .name = "log_output",
                .handler = handle_log_output_command,
                .mode = COMMAND_ANY,
                .help = "redirect logging to a file (default: stderr)",
-               .usage = "file_name",
+               .usage = "[file_name | \"default\"]",
        },
        {
                .name = "debug_level",
@@ -420,7 +401,7 @@ char *alloc_printf(const char *format, ...)
  * fast when invoked more often than every 500ms.
  *
  */
-void keep_alive()
+void keep_alive(void)
 {
        current_time = timeval_ms();
        if (current_time-last_time > 1000) {
@@ -455,7 +436,7 @@ void keep_alive()
 }
 
 /* reset keep alive timer without sending message */
-void kept_alive()
+void kept_alive(void)
 {
        current_time = timeval_ms();
        last_time = current_time;
@@ -484,3 +465,28 @@ void busy_sleep(uint64_t ms)
                 */
        }
 }
+
+/* Maximum size of socket error message retreived from operation system */
+#define MAX_SOCKET_ERR_MSG_LENGTH 256
+
+/* Provide log message for the last socket error.
+   Uses errno on *nix and WSAGetLastError() on Windows */
+void log_socket_error(const char *socket_desc)
+{
+       int error_code;
+#ifdef _WIN32
+       error_code = WSAGetLastError();
+       char error_message[MAX_SOCKET_ERR_MSG_LENGTH];
+       error_message[0] = '\0';
+       DWORD retval = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, error_code, 0,
+               error_message, MAX_SOCKET_ERR_MSG_LENGTH, NULL);
+       error_message[MAX_SOCKET_ERR_MSG_LENGTH - 1] = '\0';
+       const bool have_message = (retval != 0) && (error_message[0] != '\0');
+       LOG_ERROR("Error on socket '%s': WSAGetLastError==%d%s%s.", socket_desc, error_code,
+               (have_message ? ", message: " : ""),
+               (have_message ? error_message : ""));
+#else
+       error_code = errno;
+       LOG_ERROR("Error on socket '%s': errno==%d, message: %s.", socket_desc, error_code, strerror(error_code));
+#endif
+}