commit 319ae6d958ac336e6b614fa8b38fa3396d0382f8
from: Thomas <bthw@posteo.net>
date: Thu Mar 28 12:23:56 2019 UTC

empty buffer before writing

empty the buffer the temporary music information is stored in to prevent
corrupted text. this only has to be done when less bytes are read than
before since otherwise these will only be overwritten.

commit - 1aa7eef17892069fab528c922d949c77c86f632b
commit + 319ae6d958ac336e6b614fa8b38fa3396d0382f8
blob - ed5a5c16e6ad4ca5530d407bf41277af0e61c727
blob + a9c2df64482101211537b5ff1910e18716b5e4bc
--- id3v1.c
+++ id3v1.c
@@ -53,6 +53,9 @@ printid3v1(FILE *f)
     fread(buffer, 30, 1, f);
     printf("Album: %s\n", buffer);
 
+    /* empty the buffer before writing 4 bytes */
+    /* last byte can be set to 0 since 0 == '\0' */
+    memset(buffer, 0, sizeof(buffer));
     /* read 4 bytes for the year */
     fread(buffer, 4, 1, f);
     printf("Year: %s\n", buffer);
@@ -61,6 +64,8 @@ printid3v1(FILE *f)
     fread(buffer, 30, 1, f);
     printf("Comment: %s\n", buffer);
 
+    /* empty the buffer before writing 1 byte */
+    memset(buffer, 0, sizeof(buffer));
     /* read 1 byte for the genre */
     fread(buffer, 1, 1, f);
     printf("Genre: %d\n", buffer[0]);