#include "plplotP.h"

Macros
#define	NEED_PLDEBUG

Functions
static void	print_ieeef (float , U_LONG )

static int	pdf_wrx (const U_CHAR x, long nitems, PDFstrm pdfs)

void	pdf_set (char *option, int value)

PDFstrm *	pdf_fopen (PLCHAR_VECTOR filename, PLCHAR_VECTOR mode)

PDFstrm *	pdf_bopen (U_CHAR *buffer, size_t bufmax)

PDFstrm *	pdf_finit (FILE *file)

int	pdf_close (PDFstrm *pdfs)

int	pdf_putc (int c, PDFstrm *pdfs)

int	pdf_getc (PDFstrm *pdfs)

int	pdf_ungetc (int c, PDFstrm *pdfs)

int	pdf_rdx (U_CHAR x, long nitems, PDFstrm pdfs)

int	pdf_wr_header (PDFstrm *pdfs, PLCHAR_VECTOR header)

int	pdf_rd_header (PDFstrm pdfs, char header)

int	pdf_wr_string (PDFstrm *pdfs, PLCHAR_VECTOR string)

int	pdf_rd_string (PDFstrm pdfs, char string, int nmax)

int	pdf_wr_1byte (PDFstrm *pdfs, U_CHAR s)

int	pdf_rd_1byte (PDFstrm pdfs, U_CHAR ps)

int	pdf_wr_2bytes (PDFstrm *pdfs, U_SHORT s)

int	pdf_rd_2bytes (PDFstrm pdfs, U_SHORT ps)

int	pdf_wr_2nbytes (PDFstrm pdfs, U_SHORT s, PLINT n)

int	pdf_rd_2nbytes (PDFstrm pdfs, U_SHORT s, PLINT n)

int	pdf_wr_4bytes (PDFstrm *pdfs, U_LONG s)

int	pdf_rd_4bytes (PDFstrm pdfs, U_LONG ps)

int	pdf_wr_ieeef (PDFstrm *pdfs, float f)

int	pdf_rd_ieeef (PDFstrm pdfs, float pf)

Variables
static int	debug = 0

Detailed Description

These functions do the low-level reading/writing of portable data files. Data can be written to/read from either a file handle or memory buffer.

Definition in file pdfutils.c.

Macro Definition Documentation

#define NEED_PLDEBUG

Definition at line 37 of file pdfutils.c.

Function Documentation

PDFstrm* pdf_bopen	(	U_CHAR *	buffer,
		size_t	bufmax
	)

Initializes a PDFstrm for reading/writing to a memory buffer. If buffer is NULL, a standard buffer is allocated.

Parameters

buffer	User allocated memory, can be NULL.
bufmax	Size of buffer, or the desired buffer.

Returns: A PDFstrm structure.

Definition at line 152 of file pdfutils.c.

int pdf_close ( PDFstrm * pdfs )

Closes a PDFstrm. Used exactly like fclose().

Parameters

pdfs	The file stream to close.

Returns: 0

Definition at line 238 of file pdfutils.c.

PDFstrm* pdf_finit ( FILE * file )

Initializes a PDFstrm for a file oriented device. Like pdf_fopen() but an existing file handle is specified.

Parameters

file	A open file handle.

Returns: A PDFstrm structure.

Definition at line 204 of file pdfutils.c.

PDFstrm* pdf_fopen	(	PLCHAR_VECTOR	filename,
		PLCHAR_VECTOR	mode
	)

Initializes a PDFstrm for a file oriented device. Used exactly like fopen().

Parameters

filename	The filename of the file to open.
mode	File access mode, as would be used by fopen.

Definition at line 74 of file pdfutils.c.

int pdf_getc ( PDFstrm * pdfs )

Reads a single character.

Parameters

pdfs	The stream to read the character from.

Returns: The character read or EOF.

Definition at line 325 of file pdfutils.c.

int pdf_putc	(	int	c,
		PDFstrm *	pdfs
	)

Writes a single character.

Parameters

c	The character to write.
pdfs	The stream to write it to.

Returns: The character written or EOF.

Definition at line 276 of file pdfutils.c.

int pdf_rd_1byte	(	PDFstrm *	pdfs,
		U_CHAR *	ps
	)

Reads a single byte, storing into a U_CHAR.

Parameters

pdfs	The stream to read the byte from.
ps	Storage for the byte.

Returns: 0 if successful.

Definition at line 660 of file pdfutils.c.

int pdf_rd_2bytes	(	PDFstrm *	pdfs,
		U_SHORT *	ps
	)

Reads a U_SHORT from two single bytes, low end first.

Parameters

pdfs	The stream to read the two bytes from.
ps	Pre-allocated storage for the two bytes.

Returns: 0 if successful.

Definition at line 710 of file pdfutils.c.

int pdf_rd_2nbytes	(	PDFstrm *	pdfs,
		U_SHORT *	s,
		PLINT	n
	)

Reads n U_SHORT's from 2n single bytes, low end first.

Parameters

pdfs	The stream to read the shorts from.
s	Pre-allocated storage for the shorts.
n	Size of s.

Returns: 0 if successful.

Definition at line 771 of file pdfutils.c.

int pdf_rd_4bytes	(	PDFstrm *	pdfs,
		U_LONG *	ps
	)

Reads an unsigned long from 4 single bytes, low end first.

Parameters

pdfs	The stream to read the unsigned long from.
ps	Pre-allocated storage for the unsigned long.

Returns: 0 is successful.

Definition at line 832 of file pdfutils.c.

int pdf_rd_header	(	PDFstrm *	pdfs,
		char *	header
	)

Reads a newline-terminated header string from PDFstrm *pdfs, and converts to a usual NULL-terminated string. 80 chars maximum assumed.

Parameters

pdfs	The stream to read the header from.
header	Pre-allocated storage for the header.

Returns: 0 if successful.

Definition at line 542 of file pdfutils.c.

int pdf_rd_ieeef	(	PDFstrm *	pdfs,
		float *	pf
	)

Reads a float from a IEEE single precision (32 bit) format.

Parameters

pdfs	The stream to read the float from.
pf	Pre-allocated storage for the float.

Returns: 0 if successful.

Definition at line 992 of file pdfutils.c.

int pdf_rd_string	(	PDFstrm *	pdfs,
		char *	string,
		int	nmax
	)

Reads a null-terminated string from PDFstrm *pdfs. A max of nmax chars are read.

Parameters

pdfs	The stream to read the string from.
string	Pre-allocated storage for the string.
nmax	The size of string.

Returns: 0 if successful.

Definition at line 604 of file pdfutils.c.

int pdf_rdx	(	U_CHAR *	x,
		long	nitems,
		PDFstrm *	pdfs
	)

Reads a record.

Parameters

x	Storage for the data to read.
nitems	The length of the x.
pdfs	The stream to read it from.

Returns: The number of bytes read.

Definition at line 464 of file pdfutils.c.

void pdf_set	(	char *	option,
		int	value
	)

Set an option. Pretty sparse right now but you never know.

Parameters

option	The option string.
value	The value to set it to.

Definition at line 56 of file pdfutils.c.

int pdf_ungetc	(	int	c,
		PDFstrm *	pdfs
	)

Push back the last command read.

Parameters

c	The character to pushback.
pdfs	The stream to push it back into.

Returns: The character pushed back, or EOF.

Definition at line 365 of file pdfutils.c.

int pdf_wr_1byte	(	PDFstrm *	pdfs,
		U_CHAR	s
	)

Writes a U_CHAR as a single byte.

Parameters

pdfs	The stream to write the byte too.
s	The byte to write.

Returns: 0 if successful.

Definition at line 636 of file pdfutils.c.

int pdf_wr_2bytes	(	PDFstrm *	pdfs,
		U_SHORT	s
	)

Writes a U_SHORT as two single bytes, low end first.

Parameters

pdfs	The stream to write the two bytes to.
s	The two bytes to write.

Returns: 0 if successful.

Definition at line 684 of file pdfutils.c.

int pdf_wr_2nbytes	(	PDFstrm *	pdfs,
		U_SHORT *	s,
		PLINT	n
	)

Writes n U_SHORT's as 2n single bytes, low end first.

Parameters

pdfs	The stream to write the shorts to.
s	An array of shorts.
n	Size of s.

Returns: 0 if successful.

Definition at line 741 of file pdfutils.c.

int pdf_wr_4bytes	(	PDFstrm *	pdfs,
		U_LONG	s
	)

Writes an unsigned long as four single bytes, low end first.

Parameters

pdfs	The stream to write the unsigned long to.
s	The unsigned long to write.

Returns: 0 if successful.

Definition at line 804 of file pdfutils.c.

int pdf_wr_header	(	PDFstrm *	pdfs,
		PLCHAR_VECTOR	header
	)

Writes a header string. Input string must be NULL-terminated. The written string is terminated by a new-line, not a NULL. This is done so you can type e.g. "% strings <file> | head" and get sensible output.

Parameters

pdfs	The stream to which to write the header.
header	The header.

Returns: 0 if there was no error.

Definition at line 509 of file pdfutils.c.

int pdf_wr_ieeef	(	PDFstrm *	pdfs,
		float	f
	)

Writes a float in IEEE single precision (32 bit) format.

Parameters

pdfs	The stream to write the float to.
f	The float.

Returns: 0 if successful.

Definition at line 916 of file pdfutils.c.

int pdf_wr_string	(	PDFstrm *	pdfs,
		PLCHAR_VECTOR	string
	)

Writes a null-terminated string.

Parameters

pdfs	The stream to write the string to.
string	The string to write.

Returns: 0 if successful.

Definition at line 574 of file pdfutils.c.

static int pdf_wrx	(	const U_CHAR *	x,
		long	nitems,
		PDFstrm *	pdfs
	)

static

Writes a record.

Parameters

x	The data to write.
nitems	The length of x.
pdfs	The stream to write it to.

Returns: The number of bytes actually written.

Definition at line 411 of file pdfutils.c.

static void print_ieeef	(	float *	vx,
		U_LONG *	vy
	)

static

Prints binary representation for numbers pointed to by arguments. The first argument is the original float, the second is the IEEE representation. They should be the same on any machine that uses IEEE floats.

Parameters

vx	The original float?
vy	The IEEE representation?

Definition at line 1048 of file pdfutils.c.

Variable Documentation

int debug = 0

static

Definition at line 43 of file pdfutils.c.

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

Function Documentation

Variable Documentation