]> sigrok.org Git - libsigrok.git/blobdiff - src/input/csv.c
input/csv: Concentrate text line encoding in a single spot
[libsigrok.git] / src / input / csv.c
index cc451bacdab05382b5a38f9074e56f77c8d4ef00..fa1d51fd05a787ca7a7241f263308d2f9170137e 100644 (file)
@@ -89,7 +89,7 @@ struct context {
        /* Comment prefix character(s). */
        GString *comment;
 
-       /* Termination  character(s) used in current stream. */
+       /* Termination character(s) used in current stream. */
        char *termination;
 
        /* Determines if sample data is stored in multiple columns. */
@@ -313,20 +313,22 @@ static char **parse_line(char *buf, struct context *inc, int max_columns)
 static int parse_multi_columns(char **columns, struct context *inc)
 {
        gsize i;
+       char *column;
 
        /* Clear buffer in order to set bits only. */
        memset(inc->sample_buffer, 0, (inc->num_channels + 7) >> 3);
 
        for (i = 0; i < inc->num_channels; i++) {
-               if (columns[i][0] == '1') {
+               column = columns[i];
+               if (column[0] == '1') {
                        inc->sample_buffer[i / 8] |= (1 << (i % 8));
-               } else if (!strlen(columns[i])) {
+               } else if (!strlen(column)) {
                        sr_err("Column %zu in line %zu is empty.",
                                inc->first_channel + i, inc->line_number);
                        return SR_ERR;
-               } else if (columns[i][0] != '0') {
+               } else if (column[0] != '0') {
                        sr_err("Invalid value '%s' in column %zu in line %zu.",
-                               columns[i], inc->first_channel + i,
+                               column, inc->first_channel + i,
                                inc->line_number);
                        return SR_ERR;
                }
@@ -371,7 +373,8 @@ static int send_samples(const struct sr_dev_inst *sdi, uint8_t *buffer,
        logic.data = buffer;
 
        for (i = 0; i < count; i++) {
-               if ((res = sr_session_send(sdi, &packet)) != SR_OK)
+               res = sr_session_send(sdi, &packet);
+               if (res != SR_OK)
                        return res;
        }
 
@@ -444,6 +447,8 @@ static int init(struct sr_input *in, GHashTable *options)
        return SR_OK;
 }
 
+static const char *delim_set = "\r\n";
+
 static const char *get_line_termination(GString *buf)
 {
        const char *term;
@@ -466,26 +471,27 @@ static int initial_parse(const struct sr_input *in, GString *buf)
        unsigned int num_columns, i;
        size_t line_number, l;
        int ret;
-       char **lines, **columns;
+       char **lines, *line, **columns, *column;
 
        ret = SR_OK;
        inc = in->priv;
        columns = NULL;
 
        line_number = 0;
-       lines = g_strsplit_set(buf->str, "\r\n", 0);
+       lines = g_strsplit_set(buf->str, delim_set, 0);
        for (l = 0; lines[l]; l++) {
                line_number++;
+               line = lines[l];
                if (inc->start_line > line_number) {
                        sr_spew("Line %zu skipped.", line_number);
                        continue;
                }
-               if (lines[l][0] == '\0') {
+               if (line[0] == '\0') {
                        sr_spew("Blank line %zu skipped.", line_number);
                        continue;
                }
-               strip_comment(lines[l], inc->comment);
-               if (lines[l][0] == '\0') {
+               strip_comment(line, inc->comment);
+               if (line[0] == '\0') {
                        sr_spew("Comment-only line %zu skipped.", line_number);
                        continue;
                }
@@ -503,7 +509,8 @@ static int initial_parse(const struct sr_input *in, GString *buf)
         * In order to determine the number of columns parse the current line
         * without limiting the number of columns.
         */
-       if (!(columns = parse_line(lines[l], inc, -1))) {
+       columns = parse_line(line, inc, -1);
+       if (!columns) {
                sr_err("Error while parsing line %zu.", line_number);
                ret = SR_ERR;
                goto out;
@@ -543,8 +550,9 @@ static int initial_parse(const struct sr_input *in, GString *buf)
 
        channel_name = g_string_sized_new(64);
        for (i = 0; i < inc->num_channels; i++) {
-               if (inc->header && inc->multi_column_mode && columns[i][0] != '\0')
-                       g_string_assign(channel_name, columns[i]);
+               column = columns[i];
+               if (inc->header && inc->multi_column_mode && column[0] != '\0')
+                       g_string_assign(channel_name, column);
                else
                        g_string_printf(channel_name, "%u", i);
                sr_channel_new(in->sdi, i, SR_CHANNEL_LOGIC, TRUE, channel_name->str);
@@ -576,11 +584,13 @@ static int initial_receive(const struct sr_input *in)
 
        inc = in->priv;
 
-       if (!(termination = get_line_termination(in->buf)))
+       termination = get_line_termination(in->buf);
+       if (!termination)
                /* Don't have a full line yet. */
                return SR_ERR_NA;
 
-       if (!(p = g_strrstr_len(in->buf->str, in->buf->len, termination)))
+       p = g_strrstr_len(in->buf->str, in->buf->len, termination);
+       if (!p)
                /* Don't have a full line yet. */
                return SR_ERR_NA;
        len = p - in->buf->str - 1;
@@ -608,11 +618,11 @@ static int process_buffer(struct sr_input *in)
        gsize num_columns;
        uint64_t samplerate;
        int max_columns, ret, l;
-       char *p, **lines, **columns;
+       char *p, **lines, *line, **columns;
 
        inc = in->priv;
        if (!inc->started) {
-               std_session_send_df_header(in->sdi, LOG_PREFIX);
+               std_session_send_df_header(in->sdi);
 
                if (inc->samplerate) {
                        packet.type = SR_DF_META;
@@ -621,13 +631,15 @@ static int process_buffer(struct sr_input *in)
                        src = sr_config_new(SR_CONF_SAMPLERATE, g_variant_new_uint64(samplerate));
                        meta.config = g_slist_append(NULL, src);
                        sr_session_send(in->sdi, &packet);
+                       g_slist_free(meta.config);
                        sr_config_free(src);
                }
 
                inc->started = TRUE;
        }
 
-       if (!(p = g_strrstr_len(in->buf->str, in->buf->len, inc->termination)))
+       p = g_strrstr_len(in->buf->str, in->buf->len, inc->termination);
+       if (!p)
                /* Don't have a full line. */
                return SR_ERR;
 
@@ -641,17 +653,18 @@ static int process_buffer(struct sr_input *in)
                max_columns = 1;
 
        ret = SR_OK;
-       lines = g_strsplit_set(in->buf->str, "\r\n", 0);
+       lines = g_strsplit_set(in->buf->str, delim_set, 0);
        for (l = 0; lines[l]; l++) {
                inc->line_number++;
-               if (lines[l][0] == '\0') {
+               line = lines[l];
+               if (line[0] == '\0') {
                        sr_spew("Blank line %zu skipped.", inc->line_number);
                        continue;
                }
 
                /* Remove trailing comment. */
-               strip_comment(lines[l], inc->comment);
-               if (lines[l][0] == '\0') {
+               strip_comment(line, inc->comment);
+               if (line[0] == '\0') {
                        sr_spew("Comment-only line %zu skipped.", inc->line_number);
                        continue;
                }
@@ -663,7 +676,8 @@ static int process_buffer(struct sr_input *in)
                        continue;
                }
 
-               if (!(columns = parse_line(lines[l], inc, max_columns))) {
+               columns = parse_line(line, inc, max_columns);
+               if (!columns) {
                        sr_err("Error while parsing line %zu.", inc->line_number);
                        return SR_ERR;
                }
@@ -718,7 +732,8 @@ static int receive(struct sr_input *in, GString *buf)
 
        inc = in->priv;
        if (!inc->termination) {
-               if ((ret = initial_receive(in)) == SR_ERR_NA)
+               ret = initial_receive(in);
+               if (ret == SR_ERR_NA)
                        /* Not enough data yet. */
                        return SR_OK;
                else if (ret != SR_OK)
@@ -737,7 +752,6 @@ static int receive(struct sr_input *in, GString *buf)
 static int end(struct sr_input *in)
 {
        struct context *inc;
-       struct sr_datafeed_packet packet;
        int ret;
 
        if (in->sdi_ready)
@@ -746,11 +760,8 @@ static int end(struct sr_input *in)
                ret = SR_OK;
 
        inc = in->priv;
-       if (inc->started) {
-               /* End of stream. */
-               packet.type = SR_DF_END;
-               sr_session_send(in->sdi, &packet);
-       }
+       if (inc->started)
+               std_session_send_df_end(in->sdi);
 
        return ret;
 }
@@ -771,6 +782,17 @@ static void cleanup(struct sr_input *in)
        g_free(inc->sample_buffer);
 }
 
+static int reset(struct sr_input *in)
+{
+       struct context *inc = in->priv;
+
+       cleanup(in);
+       inc->started = FALSE;
+       g_string_truncate(in->buf, 0);
+
+       return SR_OK;
+}
+
 static struct sr_option options[] = {
        { "single-column", "Single column", "Enable/specify single column", NULL, NULL },
        { "numchannels", "Max channels", "Number of channels", NULL, NULL },
@@ -784,7 +806,7 @@ static struct sr_option options[] = {
        ALL_ZERO
 };
 
-static struct sr_option *get_options(void)
+static const struct sr_option *get_options(void)
 {
        if (!options[0].def) {
                options[0].def = g_variant_ref_sink(g_variant_new_int32(0));
@@ -811,4 +833,5 @@ SR_PRIV struct sr_input_module input_csv = {
        .receive = receive,
        .end = end,
        .cleanup = cleanup,
+       .reset = reset,
 };