Method

VipsSourcesniff_at_most

Declaration [src]

gint64
vips_source_sniff_at_most (
  VipsSource* source,
  unsigned char** data,
  size_t length
)

Description [src]

Attempt to sniff at most length bytes from the start of the source. A pointer to the bytes is returned in data. The number of bytes actually read is returned — it may be less than length if the file is shorter than length. A negative number indicates a read error.

Parameters

data

Type: unsigned char**

Return a pointer to the bytes read here.

The data is owned by the caller of the method.

length

Type: size_t

Max number of bytes to read.

Return value

Type: gint64

Number of bytes read, or -1 on error.