com_ff(): Depreciate "n-" syntax.
[paraslash.git] / afh.c
diff --git a/afh.c b/afh.c
index f876244..aa6570e 100644 (file)
--- a/afh.c
+++ b/afh.c
-/*
- * Copyright (C) 2008-2014 Andre Noll <maan@tuebingen.mpg.de>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
+/* Copyright (C) 2008 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
 
 /** \file afh.c Paraslash's standalone audio format handler tool. */
 
 #include <regex.h>
+#include <lopsub.h>
 
+#include "afh.lsg.h"
 #include "para.h"
 #include "string.h"
-#include "afh.cmdline.h"
 #include "fd.h"
 #include "afh.h"
 #include "error.h"
 #include "version.h"
-#include "ggo.h"
 
-static struct afh_args_info conf;
-INIT_AFH_ERRLISTS;
+/** Array of error strings. */
+DEFINE_PARA_ERRLIST;
+
+static struct lls_parse_result *lpr;
+
+#define CMD_PTR (lls_cmd(0, afh_suite))
+#define OPT_RESULT(_name) (lls_opt_result(LSG_AFH_PARA_AFH_OPT_ ## _name, lpr))
+#define OPT_GIVEN(_name) (lls_opt_given(OPT_RESULT(_name)))
+#define OPT_STRING_VAL(_name) (lls_string_val(0, OPT_RESULT(_name)))
+#define OPT_UINT32_VAL(_name) (lls_uint32_val(0, OPT_RESULT(_name)))
 
 static int loglevel;
 INIT_STDERR_LOGGING(loglevel)
 
+static inline bool tag_needs_update(bool given, const char *tag,
+               const char *arg)
+{
+       return given && (!tag || strcmp(tag, arg) != 0);
+}
+
+static int rewrite_tags(const char *name, int input_fd, void *map,
+               size_t map_size, int audio_format_id, struct afh_info *afhi)
+{
+       struct taginfo *tags = &afhi->tags;
+       bool modified = false;
+       char *tmp_name;
+       const char *arg;
+       int output_fd = -1, ret;
+       struct stat sb;
+
+       arg = OPT_STRING_VAL(YEAR);
+       if (tag_needs_update(OPT_GIVEN(YEAR), tags->year, arg)) {
+               free(tags->year);
+               tags->year = para_strdup(arg);
+               modified = true;
+       }
+       arg = OPT_STRING_VAL(TITLE);
+       if (tag_needs_update(OPT_GIVEN(TITLE), tags->title, arg)) {
+               free(tags->title);
+               tags->title = para_strdup(arg);
+               modified = true;
+       }
+       arg = OPT_STRING_VAL(ARTIST);
+       if (tag_needs_update(OPT_GIVEN(ARTIST), tags->artist, arg)) {
+               free(tags->artist);
+               tags->artist = para_strdup(arg);
+               modified = true;
+       }
+       arg = OPT_STRING_VAL(ALBUM);
+       if (tag_needs_update(OPT_GIVEN(ALBUM), tags->album, arg)) {
+               free(tags->album);
+               tags->album = para_strdup(arg);
+               modified = true;
+       }
+       arg = OPT_STRING_VAL(COMMENT);
+       if (tag_needs_update(OPT_GIVEN(COMMENT), tags->comment, arg)) {
+               free(tags->comment);
+               tags->comment = para_strdup(arg);
+               modified = true;
+       }
+       if (!modified) {
+               PARA_WARNING_LOG("no modifications necessary\n");
+               return 0;
+       }
+       /*
+        * mkstmp() creates the temporary file with permissions 0600, but we
+        * like it to have the same permissions as the original file, so we
+        * have to get this information.
+        */
+       if (fstat(input_fd, &sb) < 0) {
+               ret = -ERRNO_TO_PARA_ERROR(errno);
+               PARA_ERROR_LOG("failed to fstat fd %d (%s)\n", input_fd, name);
+               return ret;
+       }
+       tmp_name = make_message("%s.XXXXXX", name);
+       ret = mkstemp(tmp_name);
+       if (ret < 0) {
+               ret = -ERRNO_TO_PARA_ERROR(errno);
+               PARA_ERROR_LOG("could not create temporary file\n");
+               goto out;
+       }
+       output_fd = ret;
+       if (fchmod(output_fd, sb.st_mode) < 0) {
+               ret = -ERRNO_TO_PARA_ERROR(errno);
+               PARA_ERROR_LOG("failed to fchmod fd %d (%s)\n", output_fd,
+                       tmp_name);
+               goto out;
+       }
+       ret = afh_rewrite_tags(audio_format_id, map, map_size, tags, output_fd,
+               tmp_name);
+       if (ret < 0)
+               goto out;
+       if (OPT_GIVEN(BACKUP)) {
+               char *backup_name = make_message("%s~", name);
+               ret = xrename(name, backup_name);
+               free(backup_name);
+               if (ret < 0)
+                       goto out;
+       }
+       ret = xrename(tmp_name, name);
+out:
+       if (ret < 0 && output_fd >= 0)
+               unlink(tmp_name); /* ignore errors */
+       free(tmp_name);
+       if (output_fd >= 0)
+               close(output_fd);
+       return ret;
+}
+
 static void print_info(int audio_format_num, struct afh_info *afhi)
 {
        char *msg;
@@ -32,39 +131,53 @@ static void print_info(int audio_format_num, struct afh_info *afhi)
        free(msg);
 }
 
-static void print_chunk_table(struct afh_info *afhi)
+static void print_chunk_table(struct afh_info *afhi, int audio_format_id,
+               const void *map, size_t mapsize)
 {
-       int i;
+       int i, ret;
+       void *ctx = NULL;
 
-       if (conf.parser_friendly_given) {
-               printf("chunk_table: ");
-               for (i = 0; i <= afhi->chunks_total; i++)
-                       printf("%u ", afhi->chunk_table[i]);
-               printf("\n");
-               return;
-       }
-       for (i = 1; i <= afhi->chunks_total; i++) {
+       for (i = 0; i < afhi->chunks_total; i++) {
                struct timeval tv;
                long unsigned from, to;
-               tv_scale(i - 1, &afhi->chunk_tv, &tv);
-               from = tv2ms(&tv);
+               const char *buf;
+               size_t len;
                tv_scale(i, &afhi->chunk_tv, &tv);
+               from = tv2ms(&tv);
+               tv_scale(i + 1, &afhi->chunk_tv, &tv);
                to = tv2ms(&tv);
-               printf("%d [%lu.%03lu - %lu.%03lu] %u - %u (%u)\n", i - 1,
-                       from / 1000, from % 1000, to / 1000, to % 1000,
-                       afhi->chunk_table[i - 1], afhi->chunk_table[i],
-                       afhi->chunk_table[i] - afhi->chunk_table[i - 1]);
+               ret = afh_get_chunk(i, afhi, audio_format_id, map, mapsize,
+                       &buf, &len, &ctx);
+               if (ret < 0) {
+                       PARA_ERROR_LOG("fatal: chunk %d: %s\n", i,
+                               para_strerror(-ret));
+                       return;
+               }
+               if (!OPT_GIVEN(PARSER_FRIENDLY))
+                       printf("%d [%lu.%03lu - %lu.%03lu] ", i, from / 1000,
+                               from % 1000, to / 1000, to % 1000);
+               printf("%td - %td", buf - (const char *)map,
+                       buf + len - (const char *)map);
+               if (!OPT_GIVEN(PARSER_FRIENDLY))
+                       printf(" (%zu)", len);
+               printf("\n");
        }
+       afh_close(ctx, audio_format_id);
 }
 
-__noreturn static void print_help_and_die(void)
+static void handle_help_flags(void)
 {
-       struct ggo_help h = DEFINE_GGO_HELP(afh);
-       int d = conf.detailed_help_given;
-       unsigned flags = d? GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS;
+       char *help;
 
-       ggo_print_help(&h, flags);
-       printf("supported audio formats: %s\n", AUDIO_FORMAT_HANDLERS);
+       if (OPT_GIVEN(DETAILED_HELP))
+               help = lls_long_help(CMD_PTR);
+       else if (OPT_GIVEN(HELP) || lls_num_inputs(lpr) == 0)
+               help = lls_short_help(CMD_PTR);
+       else
+               return;
+       printf("%s", help);
+       free(help);
+       printf("Supported audio formats\n  %s\n", AUDIO_FORMAT_HANDLERS);
        exit(EXIT_SUCCESS);
 }
 
@@ -78,40 +191,45 @@ __noreturn static void print_help_and_die(void)
  */
 int main(int argc, char **argv)
 {
-       int i, ret, audio_format_num, fd;
+       int i, ret = 0, audio_format_num, fd;
        void *audio_file_data;
        size_t audio_file_size;
        struct afh_info afhi;
+       char *errctx;
 
-       afh_cmdline_parser(argc, argv, &conf);
-       loglevel = get_loglevel_by_name(conf.loglevel_arg);
-       version_handle_flag("afh", conf.version_given);
-       if (conf.help_given || conf.detailed_help_given)
-               print_help_and_die();
-       afh_init();
-       ret = -E_AFH_SYNTAX;
-       if (conf.inputs_num == 0)
+       ret = lls(lls_parse(argc, argv, CMD_PTR, &lpr, &errctx));
+       if (ret < 0)
                goto out;
-       for (i = 0; i < conf.inputs_num; i++) {
+       loglevel = OPT_UINT32_VAL(LOGLEVEL);
+       version_handle_flag("afh", OPT_GIVEN(VERSION));
+       handle_help_flags();
+       afh_init();
+       for (i = 0; i < lls_num_inputs(lpr); i++) {
                int ret2;
-               ret = mmap_full_file(conf.inputs[i], O_RDONLY, &audio_file_data,
+               const char *path = lls_input(i, lpr);
+               ret = mmap_full_file(path, O_RDONLY, &audio_file_data,
                        &audio_file_size, &fd);
                if (ret < 0) {
-                       PARA_ERROR_LOG("failed to mmap \"%s\"\n", conf.inputs[i]);
+                       PARA_ERROR_LOG("failed to mmap \"%s\"\n", path);
                        goto out;
                }
-               ret = compute_afhi(conf.inputs[i], audio_file_data, audio_file_size,
+               ret = compute_afhi(path, audio_file_data, audio_file_size,
                        fd, &afhi);
-               if (ret < 0)
-                       goto out;
-
-               audio_format_num = ret;
-               printf("File %d: %s\n", i + 1, conf.inputs[i]);
-               print_info(audio_format_num, &afhi);
-               if (conf.chunk_table_given)
-                       print_chunk_table(&afhi);
-               printf("\n");
-               clear_afhi(&afhi);
+               if (ret >= 0) {
+                       audio_format_num = ret;
+                       if (OPT_GIVEN(MODIFY)) {
+                               ret = rewrite_tags(path, fd, audio_file_data,
+                                       audio_file_size, audio_format_num, &afhi);
+                       } else {
+                               printf("File %d: %s\n", i + 1, path);
+                               print_info(audio_format_num, &afhi);
+                               if (OPT_GIVEN(CHUNK_TABLE))
+                                       print_chunk_table(&afhi, audio_format_num,
+                                               audio_file_data, audio_file_size);
+                       }
+                       clear_afhi(&afhi);
+               }
+               close(fd);
                ret2 = para_munmap(audio_file_data, audio_file_size);
                if (ret2 < 0 && ret >= 0)
                        ret = ret2;
@@ -119,7 +237,9 @@ int main(int argc, char **argv)
                        break;
        }
 out:
+       if (errctx)
+               PARA_ERROR_LOG("%s\n", errctx);
        if (ret < 0)
-               PARA_ERROR_LOG("%s\n", para_strerror(-ret));
+               PARA_EMERG_LOG("%s\n", para_strerror(-ret));
        return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
 }