Add Content To A Dynamic String

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## SQLite C Interface

## Add Content To A Dynamic String

>     void sqlite3_str_appendf(sqlite3_str*, const char *zFormat, ...);
>     void sqlite3_str_vappendf(sqlite3_str*, const char *zFormat, va_list);
>     void sqlite3_str_append(sqlite3_str*, const char *zIn, int N);
>     void sqlite3_str_appendall(sqlite3_str*, const char *zIn);
>     void sqlite3_str_appendchar(sqlite3_str*, int N, char C);
>     void sqlite3_str_reset(sqlite3_str*);
>     void sqlite3_str_truncate(sqlite3_str*,int N);

These interfaces add or remove content to an sqlite3_str object previously obtained from sqlite3_str_new().

The sqlite3_str_appendf(X,F,...) and sqlite3_str_vappendf(X,F,V) interfaces uses the built-in printf functionality of SQLite to append formatted text onto the end of sqlite3_str object X.

The sqlite3_str_append(X,S,N) method appends exactly N bytes from string S onto the end of the sqlite3_str object X. N must be non-negative. S must contain at least N non-zero bytes of content. To append a zero-terminated string in its entirety, use the sqlite3_str_appendall() method instead.

The sqlite3_str_appendall(X,S) method appends the complete content of zero-terminated string S onto the end of sqlite3_str object X.

The sqlite3_str_appendchar(X,N,C) method appends N copies of the single-byte character C onto the end of sqlite3_str object X. This method can be used, for example, to add whitespace indentation.

The sqlite3_str_reset(X) method resets the string under construction inside sqlite3_str object X back to zero bytes in length.

The sqlite3_str_truncate(X,N) method changes the length of the string under construction to be N bytes or less. This routine is a no-op if N is negative or if the string is already N bytes or smaller in size.

These methods do not return a result code. If an error occurs, that fact is recorded in the sqlite3_str object and can be recovered by a subsequent call to sqlite3_str_errcode(X).

See also lists of Objects, Constants, and Functions.