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00032 #ifndef NO_PCRE
00033
00034 #include <string.h>
00035 #include <pcre.h>
00036
00037 #include "splt.h"
00038
00039 static char *splt_fr_get_pattern(pcre *re, const char *filename, int *ovector,
00040 int rc, char *key);
00041 static void splt_fr_copy_pattern_to_tags(pcre *re, const char *filename,
00042 int *ovector, int rc, char *key, int tags_field, splt_tags *tags,
00043 int format, int replace_underscores, int *error);
00044 static int splt_fr_get_int_pattern(pcre *re, const char *filename,
00045 int *ovector, int rc, char *key);
00046 static void splt_fr_set_char_field_on_tags_and_convert(splt_tags *tags,
00047 int tags_field, char *pattern, int format, int replace_underscores, int *error);
00048
00054 splt_tags *splt_fr_parse_from_state(splt_state *state, int *error)
00055 {
00056 const char *filename_to_split = splt_t_get_filename_to_split(state);
00057 char *regex = splt_t_get_input_filename_regex(state);
00058 char *default_comment = splt_t_get_default_comment_tag(state);
00059 char *default_genre = splt_t_get_default_genre_tag(state);
00060
00061 char *filename = splt_su_get_fname_without_path_and_extension(filename_to_split, error);
00062 if (*error < 0)
00063 {
00064 return NULL;
00065 }
00066
00067 splt_tags *tags = splt_fr_parse(state, filename, regex, default_comment, default_genre, error);
00068
00069 if (filename)
00070 {
00071 free(filename);
00072 filename = NULL;
00073 }
00074
00075 return tags;
00076 }
00077
00078 splt_tags *splt_fr_parse(splt_state *state, const char *filename, const char *regex,
00079 const char *default_comment, const char *default_genre, int *error)
00080 {
00081 const char *errorbits;
00082 int erroroffset;
00083
00084 splt_d_print_debug(state, "filename for regex = _%s_\n", filename);
00085 splt_d_print_debug(state, "regex = _%s_\n", regex);
00086
00087 if (regex == NULL)
00088 {
00089 *error = SPLT_INVALID_REGEX;
00090 splt_e_set_error_data(state, _("no regular expression provided"));
00091 return NULL;
00092 }
00093
00094 pcre *re = pcre_compile(regex, PCRE_CASELESS | PCRE_UTF8, &errorbits, &erroroffset, NULL);
00095 if (!re)
00096 {
00097 *error = SPLT_INVALID_REGEX;
00098 char *message = splt_su_get_formatted_message(state, "@%u: %s",
00099 erroroffset, errorbits);
00100 splt_e_set_error_data(state, message);
00101 return NULL;
00102 }
00103
00104 int ovector[90] = {0,};
00105 const size_t ovsize = sizeof(ovector)/sizeof(*ovector);
00106
00107 int rc = pcre_exec(re, NULL, filename, strlen(filename), 0, 0, ovector, ovsize);
00108 if (rc == PCRE_ERROR_NOMATCH)
00109 {
00110 *error = SPLT_REGEX_NO_MATCH;
00111 pcre_free(re);
00112 return NULL;
00113 }
00114
00115 splt_tags *tags = splt_tu_new_tags(state, error);
00116 if (*error < 0)
00117 {
00118 pcre_free(re);
00119 return NULL;
00120 }
00121 splt_tu_reset_tags(tags);
00122
00123 int replace_underscores =
00124 splt_o_get_int_option(state, SPLT_OPT_REPLACE_UNDERSCORES_TAG_FORMAT);
00125
00126 int format = splt_o_get_int_option(state, SPLT_OPT_ARTIST_TAG_FORMAT);
00127 splt_fr_copy_pattern_to_tags(re, filename, ovector, rc, "artist",
00128 SPLT_TAGS_ARTIST, tags, format, replace_underscores, error);
00129 if (*error < 0) { goto error; }
00130
00131 format = splt_o_get_int_option(state, SPLT_OPT_ALBUM_TAG_FORMAT);
00132 splt_fr_copy_pattern_to_tags(re, filename, ovector, rc, "album",
00133 SPLT_TAGS_ALBUM, tags, format, replace_underscores, error);
00134 if (*error < 0) { goto error; }
00135
00136 splt_fr_copy_pattern_to_tags(re, filename, ovector, rc, "year",
00137 SPLT_TAGS_YEAR, tags, SPLT_NO_CONVERSION, SPLT_FALSE, error);
00138 if (*error < 0) { goto error; }
00139
00140 char *pattern = NULL;
00141 format = splt_o_get_int_option(state, SPLT_OPT_COMMENT_TAG_FORMAT);
00142 pattern = splt_fr_get_pattern(re, filename, ovector, rc, "comment");
00143 if (pattern)
00144 {
00145 splt_fr_set_char_field_on_tags_and_convert(tags, SPLT_TAGS_COMMENT,
00146 pattern, format, replace_underscores, error);
00147 pcre_free_substring(pattern);
00148 if (*error < 0) { goto error; }
00149 }
00150 else
00151 {
00152 splt_tu_set_field_on_tags(tags, SPLT_TAGS_COMMENT, default_comment);
00153 }
00154
00155 int track = splt_fr_get_int_pattern(re, filename, ovector, rc, "tracknum");
00156 if (track != -1)
00157 {
00158 splt_tu_set_field_on_tags(tags, SPLT_TAGS_TRACK, &track);
00159 }
00160
00161
00162 int total_tracks = splt_fr_get_int_pattern(re, filename, ovector, rc, "tracks");
00163
00164 format = splt_o_get_int_option(state, SPLT_OPT_TITLE_TAG_FORMAT);
00165 char *title = splt_fr_get_pattern(re, filename, ovector, rc, "title");
00166 if (title)
00167 {
00168 splt_fr_set_char_field_on_tags_and_convert(tags, SPLT_TAGS_TITLE,
00169 title, format, replace_underscores, error);
00170 pcre_free_substring(title);
00171 if (*error < 0) { goto error; }
00172 }
00173 else
00174 {
00175 if (track != -1 && total_tracks != -1)
00176 {
00177 title = splt_su_get_formatted_message(state, "Track %d of %d", track, total_tracks);
00178 }
00179 else if (track != -1 && total_tracks == -1)
00180 {
00181 title = splt_su_get_formatted_message(state, "Track %d", track);
00182 }
00183
00184 if (title)
00185 {
00186 splt_fr_set_char_field_on_tags_and_convert(tags, SPLT_TAGS_TITLE, title,
00187 SPLT_NO_CONVERSION, SPLT_FALSE, error);
00188
00189 free(title);
00190 title = NULL;
00191
00192 if (*error < 0) { goto error; }
00193 }
00194 }
00195
00196 char *genre = splt_fr_get_pattern(re, filename, ovector, rc, "genre");
00197 if (genre)
00198 {
00199 splt_tu_set_field_on_tags(tags, SPLT_TAGS_GENRE, genre);
00200 pcre_free_substring(genre);
00201 if (*error < 0) { goto error; }
00202 }
00203 else
00204 {
00205 splt_tu_set_field_on_tags(tags, SPLT_TAGS_GENRE, default_genre);
00206 }
00207
00208 pcre_free(re);
00209
00210 *error = SPLT_REGEX_OK;
00211
00212 return tags;
00213
00214 error:
00215 pcre_free(re);
00216 splt_tu_free_one_tags(&tags);
00217 return NULL;
00218 }
00219
00220 static void splt_fr_copy_pattern_to_tags(pcre *re, const char *filename,
00221 int *ovector, int rc, char *key, int tags_field, splt_tags *tags,
00222 int format, int replace_underscores, int *error)
00223 {
00224 char *pattern = NULL;
00225 pattern = splt_fr_get_pattern(re, filename, ovector, rc, key);
00226
00227 splt_fr_set_char_field_on_tags_and_convert(tags, tags_field, pattern,
00228 format, replace_underscores, error);
00229
00230 if (pattern)
00231 {
00232 pcre_free_substring(pattern);
00233 }
00234 }
00235
00236 static int splt_fr_get_int_pattern(pcre *re, const char *filename,
00237 int *ovector, int rc, char *key)
00238 {
00239 int value = -1;
00240
00241 char *pattern = NULL;
00242 pattern = splt_fr_get_pattern(re, filename, ovector, rc, key);
00243 if (pattern)
00244 {
00245 value = atoi(pattern);
00246 pcre_free_substring(pattern);
00247 }
00248
00249 return value;
00250 }
00251
00252 static char *splt_fr_get_pattern(pcre *re, const char *filename, int *ovector,
00253 int rc, char *key)
00254 {
00255 char *pattern = NULL;
00256
00257 if (pcre_get_named_substring(re, filename, ovector, rc, key,
00258 (const char**)&pattern) == PCRE_ERROR_NOSUBSTRING)
00259 {
00260 return NULL;
00261 }
00262 else
00263 {
00264 return pattern;
00265 }
00266 }
00267
00268 static void splt_fr_set_char_field_on_tags_and_convert(splt_tags *tags,
00269 int tags_field, char *pattern, int format, int replace_underscores, int *error)
00270 {
00271 if (replace_underscores)
00272 {
00273 splt_su_replace_all_char(pattern, '_', ' ');
00274 }
00275
00276 char *converted_pattern = splt_su_convert(pattern, format, error);
00277 if (*error < 0) { return; }
00278
00279 splt_tu_set_field_on_tags(tags, tags_field, converted_pattern);
00280
00281 if (converted_pattern)
00282 {
00283 free(converted_pattern);
00284 converted_pattern = NULL;
00285 }
00286 }
00287
00288 #endif
00289