From 0441d265f2bb9da249c7abf333f0f771fadb4ab5 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 15 Apr 2024 19:36:47 +0200 Subject: Adding upstream version 1:2.3.21+dfsg1. Signed-off-by: Daniel Baumann --- src/lib/istream-sized.h | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 src/lib/istream-sized.h (limited to 'src/lib/istream-sized.h') diff --git a/src/lib/istream-sized.h b/src/lib/istream-sized.h new file mode 100644 index 0000000..7cbb6c6 --- /dev/null +++ b/src/lib/istream-sized.h @@ -0,0 +1,41 @@ +#ifndef ISTREAM_SIZED_H +#define ISTREAM_SIZED_H + +struct istream_sized_error_data { + /* Stream's current v_offset */ + uoff_t v_offset; + /* How many more bytes are being added within this read() */ + size_t new_bytes; + /* What's the original wanted size. */ + uoff_t wanted_size; + /* TRUE if we're at EOF now */ + bool eof; +}; + +typedef const char * +istream_sized_callback_t(const struct istream_sized_error_data *data, + void *context); + +/* Assume that input stream is exactly the given size. If the stream is too + small, fail with stream_errno=EPIPE. If stream is too large, fail with + stream_errno=EINVAL. */ +struct istream *i_stream_create_sized(struct istream *input, uoff_t size); +struct istream *i_stream_create_sized_range(struct istream *input, + uoff_t offset, uoff_t size); +/* Like i_stream_create_sized*(), but allow input stream's size to be larger. */ +struct istream *i_stream_create_min_sized(struct istream *input, uoff_t min_size); +struct istream *i_stream_create_min_sized_range(struct istream *input, + uoff_t offset, uoff_t min_size); +/* Same as i_stream_create_sized(), but set the error message via the + callback. */ +struct istream * +i_stream_create_sized_with_callback(struct istream *input, uoff_t size, + istream_sized_callback_t *error_callback, + void *context); +#define i_stream_create_sized_with_callback(input, size, error_callback, context) \ + i_stream_create_sized_with_callback(input, size - \ + CALLBACK_TYPECHECK(error_callback, \ + const char *(*)(const struct istream_sized_error_data *, typeof(context))), \ + (istream_sized_callback_t *)error_callback, context) + +#endif -- cgit v1.2.3