Bwrite - Revision history

Vliedel: ascii linked

2006-12-14T18:13:18Z

ascii linked

← Older revision		Revision as of 18:13, 14 December 2006
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	[[bread]] myfile.txt 0 [[$file]](myfile.txt).size &test		[[bread]] myfile.txt 0 [[$file]](myfile.txt).size &test
	[[echo]] -a [[$bvar]](&test,4,$bvar(&test,0)).text returns ''hi ther''		[[echo]] -a [[$bvar]](&test,4,$bvar(&test,0)).text returns ''hi ther''
	If the file "myfile.txt" didn't exist yet, it now contains the ascii values: ''0 0 0 104 105 32 116 104 101 114''. That is 3+7=10 bytes.		If the file "myfile.txt" didn't exist yet, it now contains the [[$asc\|ascii]] values: ''0 0 0 104 105 32 116 104 101 114''. That is 3+7=10 bytes.
	[[var]] %test = hello		[[var]] %test = hello
	bwrite myfile2.txt -1 -1 %test		bwrite myfile2.txt -1 -1 %test

Vliedel: note

2006-12-14T17:56:32Z

note

← Older revision		Revision as of 17:56, 14 December 2006
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	bwrite myfile2.txt -1 -1 %test		bwrite myfile2.txt -1 -1 %test
	We now appended ''hello'' to the file.		We now appended ''hello'' to the file.

			== Note ==
			Note that if you want to write to the start of the file, posistion 0 is the first byte in the file.

	[[Category:Binary Files]]		[[Category:Binary Files]]
	[[Category:Commands]]		[[Category:Commands]]

Vliedel at 17:44, 14 December 2006

2006-12-14T17:44:48Z

← Older revision		Revision as of 17:44, 14 December 2006
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	If ''N'' = -1 all of the specified data is written to the file.		If ''N'' = -1 all of the specified data is written to the file.

			== Examples ==
			bwrite myfile.txt 3 7 hi there
			[[bread]] myfile.txt 0 [[$file]](myfile.txt).size &test
			[[echo]] -a [[$bvar]](&test,4,$bvar(&test,0)).text returns ''hi ther''
			If the file "myfile.txt" didn't exist yet, it now contains the ascii values: ''0 0 0 104 105 32 116 104 101 114''. That is 3+7=10 bytes.
			[[var]] %test = hello
			bwrite myfile2.txt -1 -1 %test
			We now appended ''hello'' to the file.

			[[Category:Binary Files]]
			[[Category:Commands]]

Vliedel at 17:26, 14 December 2006

2006-12-14T17:26:06Z

← Older revision		Revision as of 17:26, 14 December 2006
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	If the file doesn't exist, it will be created.		If the file doesn't exist, it will be created.
	If the file is smaller then ''S'' bytes, it will be extended with zeros to the ''S''th byte.		If the file is smaller then ''S'' bytes, it will be extended with zeros to the ''S''th byte.

	If ''S'' = -1 the data will be appended to the end of the file.		If ''S'' = -1 the data will be appended to the end of the file.

	If ''N'' = -1 all of the specified data is written to the file.		If ''N'' = -1 all of the specified data is written to the file.

Vliedel at 17:25, 14 December 2006

2006-12-14T17:25:45Z

New page

The bwrite command is used to write data to a file.
<nowiki>bwrite <filename> <S> [N] <text|%var|&binvar></nowiki>
This will write ''N'' bytes from the specified ''text / %var / &binvar'' data to the ''file'', starting at position ''S''. This will overwrite existing data, if any.
If the file doesn't exist, it will be created.
If the file is smaller then ''S'' bytes, it will be extended with zeros to the ''S''th byte.
If ''S'' = -1 the data will be appended to the end of the file.
If ''N'' = -1 all of the specified data is written to the file.