Initialize state for writing a gzip file. Mark initialization by setting state->size to non-zero. Return -1 on failure or 0 on success. */

-- see zlib.h -- */

if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)

Returns true if ch is a control character (in range [1,31]).

Allocate memory for a png_struct. The malloc and memset can be replaced by a single call to calloc() if this is thought to improve performance. */

Read the end of the PNG file. Will not read past the end of the * file, will verify the end is accurate, and will read any comments * or time infor

Read the information before the actual image data. This has been * changed in v0.90 to allow reading a file that already has the magic * bytes read

The png_save_int_32 function assumes integers are stored in two's * complement format. If this isn't the case, then this routine needs to * be modi

This function is called when the application wants to use another method * of handling errors and warnings. Note that the error function MUST NOT *

This function is called when the application wants to use another method * of allocating and freeing memory. */

Checks whether the supplied bytes match the PNG signature. We allow * checking less than the full 8-byte signature so that those apps that * alread

Writes the end of the PNG file. If you don't want to write comments or * time information, you can pass NULL for info. If you already wrote these

Free the string duplicated by duplicateStringValue()/duplicateAndPrefixStringValue(). */

Converts an unsigned integer to string. * @param value Unsigned interger to convert to string * @param current Input/Output string buffer. *

=========================================================================== * Construct one Huffman tree and assigns the code bit strings and lengths

=========================================================================== * Check that the match at match_start is indeed a match. */

========================================================================= */

========================================================================= */

Load up input buffer and set eof flag if last data loaded -- return -1 on error, 0 otherwise. Note that the eof flag is set when the end of the in

Use read() to load a buffer -- return -1 on error, otherwise 0. Read from state->fd, and update state->eof, state->err, and state->msg as appropri

Make data and put in the output buffer. Assumes that state->have == 0. Data is either copied from the input file or decompressed from the input

Open a gzip file either by name or file descriptor. */

Skip len uncompressed bytes of output. Return -1 on error, 0 on success. */

=========================================================================== * Uncompress input to output then close both files. */

-- see zlib.h -- */

-- see zlib.h -- */

Create a PNG structure for reading, and allocate any memory needed. */

Initialize png_ptr structure, and allocate any memory needed */