-/*
- * Copyright (C) 2006-2011 Andre Noll <maan@systemlinux.org>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
+/* Copyright (C) 2006 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
/** \file write_common.c common functions of para_audiod and para_write */
#include <regex.h>
-#include <stdbool.h>
+#include <lopsub.h>
+#include "write_cmd.lsg.h"
#include "para.h"
#include "string.h"
#include "list.h"
#include "sched.h"
-#include "ggo.h"
#include "buffer_tree.h"
#include "write.h"
#include "error.h"
-/** the array containing the names of all supported writers */
-const char *writer_names[] ={WRITER_NAMES};
+/** Loop over all writers. */
+#define FOR_EACH_WRITER(i) for (i = 1; lls_cmd(i, write_cmd_suite); i++)
-/** the array of supported writers */
-struct writer writers[NUM_SUPPORTED_WRITERS] = {WRITER_ARRAY};
-/**
- * Call the init function of each supported paraslash writer.
- */
-void writer_init(void)
+static inline bool writer_supported(int wid)
+{
+ return lls_user_data(WRITE_CMD(wid));
+}
+
+/* simply return the first available writer */
+static int default_writer_id(void)
{
int i;
FOR_EACH_WRITER(i)
- writers[i].init(&writers[i]);
+ if (writer_supported(i))
+ return i;
+ assert(0); /* the file writer should always be available */
}
+
/**
- * Check if given string is a valid command line for any writer.
+ * Return the writer structure from a writer ID.
*
- * \param \wa String of the form writer_name:options.
- * \param writer_num Contains the number of the writer upon success.
+ * \param wid If non-positive, a pointer to the default writer is returned.
*
- * This function checks whether \a wa starts with the name of a supported
- * paraslash writer, optionally followed by a colon and any options for that
- * writer. If a valid writer name was found and further are present, the
- * remaining part of \a wa is passed to that writer's config parser.
+ * \return Pointer to a (constant) struct writer.
+ */
+const struct writer *writer_get(int wid)
+{
+ if (wid < 0)
+ wid = default_writer_id();
+ return lls_user_data(WRITE_CMD(wid));
+}
+
+/**
+ * Return name of the writer identified by a writer ID.
*
- * \return On success, a pointer to the gengetopt args info struct is returned
- * and \a writer_num contains the number of the writer. Otherwise this function
- * prints an error message and calls exit().
+ * \param wid If non-positive, the name of the default writer is returned.
+ *
+ * \return The returned buffer must not be freed by the caller.
*/
-void *check_writer_arg_or_die(const char *wa, int *writer_num)
+const char *writer_name(int wid)
{
- int i;
+ if (wid <= 0)
+ wid = default_writer_id();
+ return lls_command_name(WRITE_CMD(wid));
+}
- PARA_INFO_LOG("checking %s\n", wa);
- FOR_EACH_WRITER(i) {
- const char *name = writer_names[i];
- size_t len = strlen(name);
- char c;
- if (strlen(wa) < len)
- continue;
- if (strncmp(name, wa, len))
- continue;
- c = wa[len];
- if (c && c != ' ')
- continue;
- *writer_num = i;
- return writers[i].parse_config_or_die(c? wa + len + 1 : "");
+/**
+ * Check if the given string is a valid command line for any writer.
+ *
+ * \param wa String of the form writer_name options.
+ * \param lprp Contains the parsed command line on success.
+ *
+ * If wa is \p NULL, the (configuration-dependent) default writer is assumed.
+ * Otherwise, the function checks whether \a wa starts with the name of a
+ * supported writer. If a valid writer name was found, the rest of the command
+ * line is passed to the config parser of this writer.
+ *
+ * \return On success, the positive writer ID is returned. Otherwise the
+ * function prints an error message and calls exit().
+ */
+int check_writer_arg_or_die(const char *wa, struct lls_parse_result **lprp)
+{
+ int ret, writer_num, argc;
+ char **argv = NULL, *errctx = NULL;
+ const struct lls_command *cmd;
+
+ if (!wa || !*wa) {
+ writer_num = default_writer_id();
+ cmd = WRITE_CMD(writer_num);
+ argv = para_malloc(2 * sizeof(char *));
+ argc = 1;
+ argv[0] = para_strdup(lls_command_name(cmd));
+ argv[1] = NULL;
+ goto parse;
}
- PARA_EMERG_LOG("invalid writer %s\n", wa);
+ ret = create_argv(wa, " \t\n", &argv);
+ if (ret < 0)
+ goto fail;
+ argc = ret;
+ ret = lls(lls_lookup_subcmd(argv[0], write_cmd_suite, &errctx));
+ if (ret < 0)
+ goto free_argv;
+ writer_num = ret;
+ cmd = WRITE_CMD(writer_num);
+ if (!writer_supported(writer_num)) {
+ ret = -ERRNO_TO_PARA_ERROR(EINVAL);
+ errctx = make_message("%s writer is not supported",
+ lls_command_name(cmd));
+ goto free_argv;
+ }
+parse:
+ ret = lls(lls_parse(argc, argv, cmd, lprp, &errctx));
+ if (ret >= 0)
+ ret = writer_num;
+free_argv:
+ free_argv(argv);
+ if (ret >= 0)
+ return ret;
+fail:
+ if (errctx)
+ PARA_ERROR_LOG("%s\n", errctx);
+ free(errctx);
+ PARA_EMERG_LOG("%s\n", para_strerror(-ret));
exit(EXIT_FAILURE);
}
* \param wn The writer node to open.
* \param parent The parent btr node (the source for the writer node).
* \param s The scheduler instance to register the task to.
- *
- * The configuration of the writer node stored in \p wn->conf must be
- * initialized before this function may be called.
*/
void register_writer_node(struct writer_node *wn, struct btr_node *parent,
struct sched *s)
{
- struct writer *w = writers + wn->writer_num;
- char *name = make_message("%s writer", writer_names[wn->writer_num]);
+ const struct writer *w = writer_get(wn->wid);
wn->btrn = btr_new_node(&(struct btr_node_description)
- EMBRACE(.name = name, .parent = parent,
+ EMBRACE(.name = writer_name(wn->wid), .parent = parent,
.handler = w->execute, .context = wn));
- strcpy(wn->task.status, name);
- free(name);
- wn->task.post_select = w->post_select;
- wn->task.pre_select = w->pre_select;
- register_task(s, &wn->task);
+ wn->task = task_register(&(struct task_info) {
+ .name = writer_name(wn->wid),
+ .pre_select = w->pre_select,
+ .post_select = w->post_select,
+ .context = wn,
+ }, s);
}
/**
* Print the help text of all writers to stdout.
*
- * \param detailed Whether to print the detailed help text.
+ * \param detailed Whether to print the short or the detailed help.
*/
-void print_writer_helps(int detailed)
+void print_writer_helps(bool detailed)
{
int i;
- printf_or_die("\nAvailable writers: \n\t");
- FOR_EACH_WRITER(i)
- printf_or_die("%s%s", i? " " : "", writer_names[i]);
- printf_or_die("\n\n");
+ printf("\nAvailable writers: ");
FOR_EACH_WRITER(i) {
- struct writer *w = writers + i;
-
- if (!w->help.short_help)
+ if (!writer_supported(i))
+ continue;
+ printf("%s%s", i? " " : "", writer_name(i));
+ }
+ printf("\n");
+ FOR_EACH_WRITER(i) {
+ const struct lls_command *cmd = WRITE_CMD(i);
+ char *help;
+ if (!writer_supported(i))
+ continue;
+ help = detailed? lls_long_help(cmd) : lls_short_help(cmd);
+ if (!help)
continue;
- printf_or_die("Options for %s:\n", writer_names[i]);
- ggo_print_help(&w->help, detailed);
+ printf("%s\n", help);
+ free(help);
}
}
projects / paraslash.git / blobdiff