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Diffstat (limited to 'Master/texmf-dist/doc/latex/songs/songidx/fileio.c')
-rw-r--r--Master/texmf-dist/doc/latex/songs/songidx/fileio.c122
1 files changed, 122 insertions, 0 deletions
diff --git a/Master/texmf-dist/doc/latex/songs/songidx/fileio.c b/Master/texmf-dist/doc/latex/songs/songidx/fileio.c
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index 00000000000..26bf56fcf37
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+++ b/Master/texmf-dist/doc/latex/songs/songidx/fileio.c
@@ -0,0 +1,122 @@
+/* Copyright (C) 2012 Kevin W. Hamlen
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ *
+ * The latest version of this program can be obtained from
+ * http://songs.sourceforge.net.
+ */
+
+#if HAVE_CONFIG_H
+# include "config.h"
+#else
+# include "vsconfig.h"
+#endif
+
+#include "chars.h"
+#include "songidx.h"
+#include "fileio.h"
+
+#if HAVE_STRING_H
+# include <string.h>
+#endif
+
+/* fileopen(<fstate>,<filename>)
+ * Open <filename> for reading, storing the file handle in <fstate>. Return
+ * 1 on success or 0 on failure.
+ */
+int
+fileopen(fs,fnam)
+ FSTATE *fs;
+ const char *fnam;
+{
+ if (strcmp(fnam,"-"))
+ {
+ fs->f = fopen(fnam, "r");
+ if (!fs->f)
+ {
+ fprintf(stderr, "songidx: Unable to open %s for reading.\n", fnam);
+ return 0;
+ }
+ }
+ else
+ {
+ fs->f = stdin;
+ fnam = "stdin";
+ }
+ fs->filename = (char *) calloc(strlen(fnam)+1, sizeof(char));
+ if (!fs->filename)
+ {
+ fprintf(stderr, "songidx: Out of memory!\n");
+ fclose(fs->f);
+ return 0;
+ }
+ strcpy(fs->filename, fnam);
+ fs->lineno = 0;
+ return 1;
+}
+
+/* fileclose(<fstate>)
+ * Close file handle <fstate>.
+ */
+void
+fileclose(fs)
+ FSTATE *fs;
+{
+ if (fs->f != stdin) fclose(fs->f);
+ free(fs->filename);
+ fs->f = NULL;
+ fs->filename = NULL;
+ fs->lineno = 0;
+}
+
+/* filereadln(<fstate>,<buffer>,<eof flag>)
+ * Read a line of output into <buffer>, which should be at least MAXLINELEN
+ * wide-characters in size. If the line is too long to fit into the buffer,
+ * close the file and report an error. Eliminate the trailing \n from the
+ * returned line. Return 1 on success or end-of-line, or 0 on failure. If
+ * end-of-line, set <eof flag> to 1. */
+int
+filereadln(fs,buf,eof)
+ FSTATE *fs;
+ WCHAR *buf;
+ int *eof;
+{
+ size_t n;
+
+ ++fs->lineno;
+ if (!ws_fgets(buf, MAXLINELEN, fs->f))
+ {
+ if (!ferror(fs->f))
+ {
+ *eof=1;
+ return 1;
+ }
+ fprintf(stderr, "songidx:%s:%d: read error\n", fs->filename, fs->lineno);
+ fileclose(fs);
+ return 0;
+ }
+ n = ws_strlen(buf);
+ if ((n==0) || ((buf[n-1] != wc_newline) && (buf[n-1] != wc_cr)))
+ {
+ fprintf(stderr, "songidx:%s:%d: line too long\n", fs->filename, fs->lineno);
+ fileclose(fs);
+ return 0;
+ }
+ buf[n-1] = wc_null;
+ if ((n>=2) && ((buf[n-2] == wc_newline) || (buf[n-2] == wc_cr)))
+ buf[n-2] = wc_null;
+ return 1;
+}