scsi-disk: restruct emulation: READ_CAPACITY

[qemu.git] / qemu-config.c

diff --git a/qemu-config.c b/qemu-config.c
index cb2c213a7d0c09d97cb21de28a960ec4835b8589..590fc052fc1a450d65c185ad0e56c2019a80622e 100644 (file)
--- a/qemu-config.c
+++ b/qemu-config.c
@@ -257,3 +257,92 @@ int qemu_set_option(const char *str)
     return 0;
 }
 
+struct ConfigWriteData {
+    QemuOptsList *list;
+    FILE *fp;
+};
+
+static int config_write_opt(const char *name, const char *value, void *opaque)
+{
+    struct ConfigWriteData *data = opaque;
+
+    fprintf(data->fp, "  %s = \"%s\"\n", name, value);
+    return 0;
+}
+
+static int config_write_opts(QemuOpts *opts, void *opaque)
+{
+    struct ConfigWriteData *data = opaque;
+    const char *id = qemu_opts_id(opts);
+
+    if (id) {
+        fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
+    } else {
+        fprintf(data->fp, "[%s]\n", data->list->name);
+    }
+    qemu_opt_foreach(opts, config_write_opt, data, 0);
+    fprintf(data->fp, "\n");
+    return 0;
+}
+
+void qemu_config_write(FILE *fp)
+{
+    struct ConfigWriteData data = { .fp = fp };
+    int i;
+
+    fprintf(fp, "# qemu config file\n\n");
+    for (i = 0; lists[i] != NULL; i++) {
+        data.list = lists[i];
+        qemu_opts_foreach(data.list, config_write_opts, &data, 0);
+    }
+}
+
+int qemu_config_parse(FILE *fp)
+{
+    char line[1024], group[64], id[64], arg[64], value[1024];
+    QemuOptsList *list = NULL;
+    QemuOpts *opts = NULL;
+
+    while (fgets(line, sizeof(line), fp) != NULL) {
+        if (line[0] == '\n') {
+            /* skip empty lines */
+            continue;
+        }
+        if (line[0] == '#') {
+            /* comment */
+            continue;
+        }
+        if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
+            /* group with id */
+            list = find_list(group);
+            if (list == NULL)
+                return -1;
+            opts = qemu_opts_create(list, id, 1);
+            continue;
+        }
+        if (sscanf(line, "[%63[^]]]", group) == 1) {
+            /* group without id */
+            list = find_list(group);
+            if (list == NULL)
+                return -1;
+            opts = qemu_opts_create(list, NULL, 0);
+            continue;
+        }
+        if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {
+            /* arg = value */
+            if (opts == NULL) {
+                fprintf(stderr, "no group defined\n");
+                return -1;
+            }
+            if (qemu_opt_set(opts, arg, value) != 0) {
+                fprintf(stderr, "failed to set \"%s\" for %s\n",
+                        arg, group);
+                return -1;
+            }
+            continue;
+        }
+        fprintf(stderr, "parse error: %s\n", line);
+        return -1;
+    }
+    return 0;
+}