input: Use sr_input_end() at end of input stream.

[sigrok-cli.git] / input.c

diff --git a/input.c b/input.c
index 7bf133125987f4fa5e8fa87fce3598d328913d78..b81e84b47a5ab94541636dc02008aa256add3608 100644 (file)
--- a/input.c
+++ b/input.c
@@ -39,6 +39,7 @@ static void load_input_file_module(void)
        struct sr_dev_inst *sdi;
        GHashTable *mod_args, *mod_opts;
        GString *buf;
+       gboolean got_sdi;
        int fd;
        ssize_t len;
        char *mod_id;
@@ -53,6 +54,7 @@ static void load_input_file_module(void)
                mod_id = g_hash_table_lookup(mod_args, "sigrok_key");
        }
 
+       fd = 0;
        buf = g_string_sized_new(BUFSIZE);
        if (mod_id) {
                /* User specified an input module to use. */
@@ -74,41 +76,68 @@ static void load_input_file_module(void)
                        g_critical("Failed to load %s: %s.", opt_input_file,
                                        strerror(errno));
        } else {
-               /* Let the input modules try to identify the file. */
-               if ((fd = open(opt_input_file, O_RDONLY)) == -1)
-                       g_critical("Failed to load %s: %s.", opt_input_file,
-                                       strerror(errno));
-               if ((len = read(fd, buf->str, BUFSIZE)) < 1)
-                       g_critical("Failed to read %s: %s.", opt_input_file,
-                                       strerror(errno));
-               buf->len = len;
-               if (!(in = sr_input_scan_buffer(buf)))
+               if (strcmp(opt_input_file, "-")) {
+                       /*
+                        * An actual filename: let the input modules try to
+                        * identify the file.
+                        */
+                       if (sr_input_scan_file(opt_input_file, &in) == SR_OK) {
+                               /* That worked, reopen the file for reading. */
+                               fd = open(opt_input_file, O_RDONLY);
+                       }
+               } else {
+                       /*
+                        * Taking input from a pipe: let the input modules try
+                        * to identify the stream content.
+                        */
+                       if (!strcmp(opt_input_file, "-")) {
+                               /* stdin */
+                               fd = 0;
+                       } else {
+                               if ((fd = open(opt_input_file, O_RDONLY)) == -1)
+                                       g_critical("Failed to load %s: %s.", opt_input_file,
+                                                       strerror(errno));
+                       }
+                       if ((len = read(fd, buf->str, BUFSIZE)) < 1)
+                               g_critical("Failed to read %s: %s.", opt_input_file,
+                                               strerror(errno));
+                       buf->len = len;
+                       sr_input_scan_buffer(buf, &in);
+               }
+               if (!in)
                        g_critical("Error: no input module found for this file.");
        }
-       sdi = sr_input_dev_inst_get(in);
-
-       if (select_channels(sdi) != SR_OK)
-               return;
-
        sr_session_new(&session);
        sr_session_datafeed_callback_add(session, &datafeed_in, NULL);
-       if (sr_session_dev_add(session, sdi) != SR_OK) {
-               g_critical("Failed to use device.");
-               sr_session_destroy(session);
-               return;
-       }
 
+       got_sdi = FALSE;
        while(TRUE) {
                g_string_truncate(buf, 0);
                len = read(fd, buf->str, BUFSIZE);
                if (len < 0)
                        g_critical("Read failed: %s", strerror(errno));
+               if (len == 0)
+                       /* End of file or stream. */
+                       break;
                buf->len = len;
                if (sr_input_send(in, buf) != SR_OK)
                        break;
-               if (len < BUFSIZE)
-                       break;
+
+               sdi = sr_input_dev_inst_get(in);
+               if(!got_sdi && sdi) {
+                       /* First time we got a valid sdi. */
+                       if (select_channels(sdi) != SR_OK)
+                               return;
+                       if (sr_session_dev_add(session, sdi) != SR_OK) {
+                               g_critical("Failed to use device.");
+                               sr_session_destroy(session);
+                               return;
+                       }
+                       got_sdi = TRUE;
+               }
+
        }
+       sr_input_end(in);
        sr_input_free(in);
        g_string_free(buf, TRUE);
 
@@ -121,13 +150,9 @@ void load_input_file(void)
        struct sr_session *session;
        struct sr_dev_inst *sdi;
        GSList *devices;
-       struct stat st;
        int ret;
 
-       if (stat(opt_input_file, &st) == -1)
-               g_critical("Failed to load %s: %s.", opt_input_file, strerror(errno));
-
-       if (sr_session_load(opt_input_file, &session) == SR_OK) {
+       if (strcmp(opt_input_file, "-") && sr_session_load(opt_input_file, &session) == SR_OK) {
                /* sigrok session file */
                ret = sr_session_dev_list(session, &devices);
                if (ret != SR_OK || !devices->data) {
@@ -144,8 +169,7 @@ void load_input_file(void)
                sr_session_start(session);
                sr_session_run(session);
                sr_session_stop(session);
-       }
-       else {
+       } else {
                /* fall back on input modules */
                load_input_file_module();
        }