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Make the sqlite3_filename_xxxx() interfaces robust against NULL pointer

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arguments, even though the documentation says the behavior is undefined
in that case.

FossilOrigin-Name: dd64c60bab4e2b44419db6882dfcc80b73d733ebe3bea64a7588c33fbc428234
This commit is contained in:
drh
2021-10-02 17:12:58 +00:00
parent 76fc88fe0f
commit cc9309c797
3 changed files with 10 additions and 8 deletions
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4
src/main.c
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@@ -4487,9 +4487,11 @@ sqlite3_int64 sqlite3_uri_int64(
** corruption.
*/
const char *sqlite3_filename_database(const char *zFilename){
if( zFilename==0 ) return 0;
return databaseName(zFilename);
}
const char *sqlite3_filename_journal(const char *zFilename){
if( zFilename==0 ) return 0;
zFilename = databaseName(zFilename);
zFilename += sqlite3Strlen30(zFilename) + 1;
while( zFilename[0] ){
@@ -4503,7 +4505,7 @@ const char *sqlite3_filename_wal(const char *zFilename){
return 0;
#else
zFilename = sqlite3_filename_journal(zFilename);
zFilename += sqlite3Strlen30(zFilename) + 1;
if( zFilename ) zFilename += sqlite3Strlen30(zFilename) + 1;
return zFilename;
#endif
}