X-Git-Url: https://git.octo.it/?p=rrdtool.git;a=blobdiff_plain;f=libraries%2Flibpng-1.2.0%2Fpngwio.c;fp=libraries%2Flibpng-1.2.0%2Fpngwio.c;h=0000000000000000000000000000000000000000;hp=efc39e690c9e3863058dc0f3726c328724b2a1d5;hb=5d405fd05bbfbbd94a7c6cbd876e6634025c1c25;hpb=bab0189ee9d56aca8bea909275317ab4e0be09ee diff --git a/libraries/libpng-1.2.0/pngwio.c b/libraries/libpng-1.2.0/pngwio.c deleted file mode 100644 index efc39e6..0000000 --- a/libraries/libpng-1.2.0/pngwio.c +++ /dev/null @@ -1,228 +0,0 @@ - -/* pngwio.c - functions for data output - * - * libpng 1.2.0 - September 1, 2001 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2001 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - * - * This file provides a location for all output. Users who need - * special handling are expected to write functions that have the same - * arguments as these and perform similar functions, but that possibly - * use different output methods. Note that you shouldn't change these - * functions, but rather write replacement functions and then change - * them at run time with png_set_write_fn(...). - */ - -#define PNG_INTERNAL -#include "png.h" -#ifdef PNG_WRITE_SUPPORTED - -/* Write the data to whatever output you are using. The default routine - writes to a file pointer. Note that this routine sometimes gets called - with very small lengths, so you should implement some kind of simple - buffering if you are using unbuffered writes. This should never be asked - to write more than 64K on a 16 bit machine. */ - -void /* PRIVATE */ -png_write_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - if (png_ptr->write_data_fn != NULL ) - (*(png_ptr->write_data_fn))(png_ptr, data, length); - else - png_error(png_ptr, "Call to NULL write function"); -} - -#if !defined(PNG_NO_STDIO) -/* This is the function that does the actual writing of data. If you are - not writing to a standard C stream, you should create a replacement - write_data function and use it at run time with png_set_write_fn(), rather - than changing the library. */ -#ifndef USE_FAR_KEYWORD -static void /* PRIVATE */ -png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - png_uint_32 check; - -#if defined(_WIN32_WCE) - if ( !WriteFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) ) - check = 0; -#else - check = fwrite(data, 1, length, (png_FILE_p)(png_ptr->io_ptr)); -#endif - if (check != length) - png_error(png_ptr, "Write Error"); -} -#else -/* this is the model-independent version. Since the standard I/O library - can't handle far buffers in the medium and small models, we have to copy - the data. -*/ - -#define NEAR_BUF_SIZE 1024 -#define MIN(a,b) (a <= b ? a : b) - -static void /* PRIVATE */ -png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - png_uint_32 check; - png_byte *near_data; /* Needs to be "png_byte *" instead of "png_bytep" */ - png_FILE_p io_ptr; - - /* Check if data really is near. If so, use usual code. */ - near_data = (png_byte *)CVT_PTR_NOCHECK(data); - io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr); - if ((png_bytep)near_data == data) - { -#if defined(_WIN32_WCE) - if ( !WriteFile(io_ptr, near_data, length, &check, NULL) ) - check = 0; -#else - check = fwrite(near_data, 1, length, io_ptr); -#endif - } - else - { - png_byte buf[NEAR_BUF_SIZE]; - png_size_t written, remaining, err; - check = 0; - remaining = length; - do - { - written = MIN(NEAR_BUF_SIZE, remaining); - png_memcpy(buf, data, written); /* copy far buffer to near buffer */ -#if defined(_WIN32_WCE) - if ( !WriteFile(io_ptr, buf, written, &err, NULL) ) - err = 0; -#else - err = fwrite(buf, 1, written, io_ptr); -#endif - if (err != written) - break; - else - check += err; - data += written; - remaining -= written; - } - while (remaining != 0); - } - if (check != length) - png_error(png_ptr, "Write Error"); -} - -#endif -#endif - -/* This function is called to output any data pending writing (normally - to disk). After png_flush is called, there should be no data pending - writing in any buffers. */ -#if defined(PNG_WRITE_FLUSH_SUPPORTED) -void /* PRIVATE */ -png_flush(png_structp png_ptr) -{ - if (png_ptr->output_flush_fn != NULL) - (*(png_ptr->output_flush_fn))(png_ptr); -} - -#if !defined(PNG_NO_STDIO) -static void /* PRIVATE */ -png_default_flush(png_structp png_ptr) -{ -#if !defined(_WIN32_WCE) - png_FILE_p io_ptr; - io_ptr = (png_FILE_p)CVT_PTR((png_ptr->io_ptr)); - if (io_ptr != NULL) - fflush(io_ptr); -#endif -} -#endif -#endif - -/* This function allows the application to supply new output functions for - libpng if standard C streams aren't being used. - - This function takes as its arguments: - png_ptr - pointer to a png output data structure - io_ptr - pointer to user supplied structure containing info about - the output functions. May be NULL. - write_data_fn - pointer to a new output function that takes as its - arguments a pointer to a png_struct, a pointer to - data to be written, and a 32-bit unsigned int that is - the number of bytes to be written. The new write - function should call png_error(png_ptr, "Error msg") - to exit and output any fatal error messages. - flush_data_fn - pointer to a new flush function that takes as its - arguments a pointer to a png_struct. After a call to - the flush function, there should be no data in any buffers - or pending transmission. If the output method doesn't do - any buffering of ouput, a function prototype must still be - supplied although it doesn't have to do anything. If - PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile - time, output_flush_fn will be ignored, although it must be - supplied for compatibility. */ -void PNGAPI -png_set_write_fn(png_structp png_ptr, png_voidp io_ptr, - png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn) -{ - png_ptr->io_ptr = io_ptr; - -#if !defined(PNG_NO_STDIO) - if (write_data_fn != NULL) - png_ptr->write_data_fn = write_data_fn; - else - png_ptr->write_data_fn = png_default_write_data; -#else - png_ptr->write_data_fn = write_data_fn; -#endif - -#if defined(PNG_WRITE_FLUSH_SUPPORTED) -#if !defined(PNG_NO_STDIO) - if (output_flush_fn != NULL) - png_ptr->output_flush_fn = output_flush_fn; - else - png_ptr->output_flush_fn = png_default_flush; -#else - png_ptr->output_flush_fn = output_flush_fn; -#endif -#endif /* PNG_WRITE_FLUSH_SUPPORTED */ - - /* It is an error to read while writing a png file */ - if (png_ptr->read_data_fn != NULL) - { - png_ptr->read_data_fn = NULL; - png_warning(png_ptr, - "Attempted to set both read_data_fn and write_data_fn in"); - png_warning(png_ptr, - "the same structure. Resetting read_data_fn to NULL."); - } -} - -#if defined(USE_FAR_KEYWORD) -#if defined(_MSC_VER) -void *png_far_to_near(png_structp png_ptr,png_voidp ptr, int check) -{ - void *near_ptr; - void FAR *far_ptr; - FP_OFF(near_ptr) = FP_OFF(ptr); - far_ptr = (void FAR *)near_ptr; - if(check != 0) - if(FP_SEG(ptr) != FP_SEG(far_ptr)) - png_error(png_ptr,"segment lost in conversion"); - return(near_ptr); -} -# else -void *png_far_to_near(png_structp png_ptr,png_voidp ptr, int check) -{ - void *near_ptr; - void FAR *far_ptr; - near_ptr = (void FAR *)ptr; - far_ptr = (void FAR *)near_ptr; - if(check != 0) - if(far_ptr != ptr) - png_error(png_ptr,"segment lost in conversion"); - return(near_ptr); -} -# endif -# endif -#endif /* PNG_WRITE_SUPPORTED */