op_fileio.h File Reference

#include "op_types.h"
#include <stdio.h>

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Functions
FILE *	op_try_open_file (char const *name, char const *mode)
FILE *	op_open_file (char const *name, char const *mode)
u32	op_read_int_from_file (char const *filename, int fatal)
void	op_close_file (FILE *fp)
void	op_write_file (FILE *fp, void const *buf, size_t size)
void	op_write_u32 (FILE *fp, u32 val)
void	op_write_u64 (FILE *fp, u64 val)
void	op_write_u8 (FILE *fp, u8 val)
char *	op_get_line (FILE *fp)
unsigned long	calc_crc32 (unsigned long crc, unsigned char *buf, size_t len)

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Detailed Description

Reading from / writing to files

Remarks:

Copyright 2002 OProfile authors

Read the file COPYING

Author:

John Levon

Philippe Elie

Definition in file op_fileio.h.

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Function Documentation

unsigned long calc_crc32	(	unsigned long	crc,
		unsigned char *	buf,
		size_t	len
	)

calc_crc32

Parameters:

	crc	current value
	buf	pointer to buffer
	len	Returns current crc computed from the crc argument and the characters in len characters in buf.

Definition at line 165 of file op_fileio.c.

void op_close_file

(

FILE *

fp

)

op_close_file - close a file

Parameters:

fp

file pointer

Closes a file pointer. A non-fatal error message is produced if the close fails.

Definition at line 52 of file op_fileio.c.

Referenced by op_cpu_freq_cpuinfo(), op_cpu_freq_sys_devices(), opd_get_ascii_maps(), opd_get_module_info(), opd_reread_module_info(), and read_tgid().

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char* op_get_line

(

FILE *

fp

)

op_get_line - read an ASCII line from a file

Parameters:

fp

file pointer

Get a line of ASCII text from a file. The file is read up to the first '' or '
'. A trailing '
' is deleted.

Returns the dynamically-allocated string containing that line. At the end of a file NULL will be returned. be returned.

The string returned must be free()d by the caller.

getline() is not a proper solution to replace this function

Definition at line 126 of file op_fileio.c.

References buf.

Referenced by _record_module_info(), get_mapping(), op_cpu_freq_cpuinfo(), op_cpu_freq_sys_devices(), opd_get_ascii_maps(), opd_get_module_info(), opd_reread_module_info(), read_events(), read_tgid(), and read_unit_masks().

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FILE* op_open_file	(	char const *	name,
		char const *	mode
	)

op_open_file - open a file

Parameters:

	name	file name
	mode	mode string

Open a file name. Failure to open is fatal.

Definition at line 46 of file op_fileio.c.

References op_do_open_file().

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u32 op_read_int_from_file	(	char const *	filename,
		int	fatal
	)

op_read_int_from_file - parse an ASCII value from a file into an integer

Parameters:

	filename	name of file to parse integer value from
	fatal	non-zero if any error must be fatal

Reads an ASCII integer from the given file. If an error occur and fatal is zero (u32)-1 is returned else the value read in is returned.

Definition at line 95 of file op_fileio.c.

Referenced by opd_read_fs_int().

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FILE* op_try_open_file	(	char const *	name,
		char const *	mode
	)

op_try_open_file - open a file

Parameters:

	name	file name
	mode	mode string

Open a file name. Returns file handle or NULL on failure.

Definition at line 40 of file op_fileio.c.

References op_do_open_file().

Referenced by op_cpu_freq_cpuinfo(), op_cpu_freq_sys_devices(), opd_get_ascii_maps(), opd_get_module_info(), opd_reread_module_info(), and read_tgid().

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void op_write_file	(	FILE *	fp,
		void const *	buf,
		size_t	size
	)

op_write_file - write to a file

Parameters:

	fp	file pointer
	buf	buffer
	size	nr. of bytes to write

Write size bytes of buffer buf to a file. Failure is fatal.

Definition at line 59 of file op_fileio.c.

Referenced by op_write_u32(), op_write_u64(), and op_write_u8().

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void op_write_u32	(	FILE *	fp,
		u32	val
	)

op_write_u32 - write four bytes to a file

Parameters:

	fp	file pointer
	val	value to write

Write an unsigned four-byte value val to a file. Failure is fatal.

No byte-swapping is done.

Definition at line 83 of file op_fileio.c.

References op_write_file().

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void op_write_u64	(	FILE *	fp,
		u64	val
	)

op_write_u64 - write eight bytes to a file

Parameters:

	fp	file pointer
	val	value to write

Write an unsigned eight-byte value val to a file. Failure is fatal.

No byte-swapping is done.

Definition at line 89 of file op_fileio.c.

References op_write_file().

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void op_write_u8	(	FILE *	fp,
		u8	val
	)

op_write_u8 - write a byte to a file

Parameters:

	fp	file pointer
	val	value to write

Write an unsigned byte value val to a file. Failure is fatal.

Definition at line 77 of file op_fileio.c.

References op_write_file().

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