Difference between revisions of "Io.open"
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__NOTOC__ | __NOTOC__ | ||
<languages /> | <languages /> | ||
| − | |||
| − | |||
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| + | '''<translate>Available since</translate>:''' Gideros 2011.6 | ||
| + | <br/> | ||
| + | '''<translate>Class</translate>:''' [[Special:MyLanguage/io|io]] | ||
| + | <br/> | ||
| − | + | === <translate>Description</translate> === | |
| + | <translate>This function opens a file, in the mode specified in the string mode. It returns a new file handle, or, in case of errors, nil plus an error message.</translate> | ||
| + | <br/> | ||
| + | The mode string can be any of the following: | ||
| + | <br/> | ||
| + | <br/> | ||
"r": read mode (the default); | "r": read mode (the default); | ||
| + | <br/> | ||
"w": write mode; | "w": write mode; | ||
| + | <br/> | ||
"a": append mode; | "a": append mode; | ||
| + | <br/> | ||
"r+": update mode, all previous data is preserved; | "r+": update mode, all previous data is preserved; | ||
| + | <br/> | ||
"w+": update mode, all previous data is erased; | "w+": update mode, all previous data is erased; | ||
| + | <br/> | ||
"a+": append update mode, previous data is preserved, writing is only allowed at the end of file. | "a+": append update mode, previous data is preserved, writing is only allowed at the end of file. | ||
| + | <br/> | ||
| + | <br/> | ||
| − | + | <translate>The mode string can also have a 'b' at the end, which is needed in some systems to open the file in binary mode. | |
| + | <br/> | ||
| + | This string is exactly what is used in the standard C function fopen.</translate> | ||
| + | <br/> | ||
<source lang="lua"> | <source lang="lua"> | ||
(file) = io.open(filename,mode) | (file) = io.open(filename,mode) | ||
</source> | </source> | ||
| + | |||
=== <translate>Parameters</translate> === | === <translate>Parameters</translate> === | ||
'''filename''': (string) <translate>filename to open</translate> <br/> | '''filename''': (string) <translate>filename to open</translate> <br/> | ||
'''mode''': (string) <translate>mode in which to open the file</translate> '''optional'''<br/> | '''mode''': (string) <translate>mode in which to open the file</translate> '''optional'''<br/> | ||
| + | |||
=== <translate>Return values</translate> === | === <translate>Return values</translate> === | ||
'''<translate>Returns</translate>''' (file) <translate>file object</translate><br/> | '''<translate>Returns</translate>''' (file) <translate>file object</translate><br/> | ||
| + | <br/> | ||
Revision as of 18:40, 2 June 2019
Available since: Gideros 2011.6
Class: io
Description
This function opens a file, in the mode specified in the string mode. It returns a new file handle, or, in case of errors, nil plus an error message.
The mode string can be any of the following:
"r": read mode (the default);
"w": write mode;
"a": append mode;
"r+": update mode, all previous data is preserved;
"w+": update mode, all previous data is erased;
"a+": append update mode, previous data is preserved, writing is only allowed at the end of file.
The mode string can also have a 'b' at the end, which is needed in some systems to open the file in binary mode.
This string is exactly what is used in the standard C function fopen.
(file) = io.open(filename,mode)
Parameters
filename: (string) filename to open
mode: (string) mode in which to open the file optional
Return values
Returns (file) file object
