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- <html>
- <head>
- <title>SWIG File Handling</title>
- </head>
- <body>
- <center>
- <h1>SWIG File Handling</h1>
- <p>
- David M. Beazley <br>
- dave-swig@dabeaz.com<br>
- December, 2006<br>
- </b>
- </center>
- <h2>Introduction</h2>
- This document describes the functions related to file and filename handling in the SWIG core. These functions are
- defined in the header file <tt>Source/Swig/swigfile.h</tt>. This API is considered to be stable.
- <h2>File Search Path</h2>
- These functions manipulate the search path for locating files.
- <p>
- <b><tt>List *Swig_add_directory(const String_or_char *dirname)</tt></b>
- <blockquote>
- Adds a new directory to the system search path. The directory is appended to
- the end of the search path. Returns a list containing the current
- system search path.
- </blockquote>
- <p>
- <b><tt>void Swig_push_directory(const String_or_char *dirname)</tt></b>
- <blockquote>
- Pushes a temporary directory onto the search path. This directory is searched before
- directories added with <tt>Swig_add_directory()</tt> except when including a system
- file explicitly (either using #include <file> or calling <tt>Swig_include_sys()</tt>).
- This function is normally used by the preprocessor to add temporary directories when
- processing #include statements.
- </blockquote>
- <p>
- <b><tt>void Swig_pop_directory()</tt></b>
- <blockquote>
- Pops off the last pushed directory with <tt>Swig_push_directory()</tt>
- </blockquote>
- <p>
- <b><tt>int Swig_get_push_dir()</tt></b>
- <blockquote>
- Returns a flag that indicates whether directory pushing is enabled or not.
- </blockquote>
- <p>
- <b><tt>void Swig_set_push_dir(int dopush)</tt></b>
- <blockquote>
- Enables or disables directory pushing. By default, it is turned on. However, the <tt>-I-</tt> command line
- option to SWIG disables it.
- </blockquote>
- <p>
- <b><tt>List *Swig_search_path()</tt></b>
- <blockquote>
- Returns the current search path.
- </blockquote>
- <h2>File access functions</h2>
- <p>
- <b><tt>FILE *Swig_open(const String_or_char *name)</tt></b>
- <blockquote>
- Opens a file, using the applicable search paths, and returns an open <tt>FILE *</tt> object if found. Returns NULL if the file is not found.
- </blockquote>
- <p>
- <b><tt>String *Swig_read_file(FILE *f)</tt></b>
- <blockquote>
- Reads all of the data from an open file into a string which is returned.
- </blockquote>
- <p>
- <b><tt>String *Swig_include(const String_or_char *name)</tt></b>
- <blockquote>
- Searches for an include file <tt>name</tt> and returns its contents as
- a string if found. Returns NULL if not found. All of the applicable
- search paths are searched when trying to locate the file.
- </blockquote>
- <p>
- <b><tt>String *Swig_include_sys(const String_or_char *name)</tt></b>
- <blockquote>
- Searches for an include file <tt>name</tt> and returns its contents as
- a string if found. Returns NULL if not found. All of the applicable
- search paths are searched when trying to locate the file, but
- preference is given to system paths first. This mimics the behavior
- of <tt>#include <file></tt> in the preprocessor.
- </blockquote>
- <p>
- <b><tt>int Swig_insert_file(const String_or_char *name, File *outfile)</tt></b>
- <blockquote>
- Searches for a file <tt>name</tt> and dumps its contents to <tt>outfile</tt> if found.
- Returns 0 on success, -1 if the file couldn't be found.
- </blockquote>
- <h2>Query functions</h2>
- <p>
- <b><tt>String *Swig_last_file()</tt></b>
- <blockquote>
- Returns the full pathname of the file last opened or included.
- </blockquote>
- <h2>Named files</h2>
- <p>
- <b><tt>void *Swig_register_filebyname(const String_or_char *filename, File *outfile)</tt></b>
- <blockquote>
- Registers a file object <tt>outfile</tt> with a specific name <tt>filename</tt>. This function is
- used to implement the SWIG %insert directive and to manage different sections of the output
- file such as "runtime","header","wrapper","init", etc. Different language modules may add their own
- sections for generating Python code, Perl code, etc.
- </blockquote>
- <p>
- <b><tt>File *Swig_filebyname(const String_or_char *filename)</tt></b>
- <blockquote>
- This looks up a file object previously registered using <tt>Swig_register_filebyname()</tt>. This
- is used to implement the %insert directive.
- </blockquote>
- <h2>Filename utilities</h2>
- <p>
- <b><tt>char *Swig_file_suffix(const String_or_char *filename)</tt></b>
- <blockquote>
- Returns the suffix of a filename. For instance, if the filename is "foo.txt", it returns ".txt".
- </blockquote>
- <p>
- <b><tt>char *Swig_file_basename(const String_or_char *filename)</tt></b>
- <blockquote>
- Returns the filename without the suffix attached to it. For instance, if the filename is "foo.txt", it returns
- "foo". The result is stored in a static variable. If you need to save it, make your own copy.
- </blockquote>
- <p>
- <b><tt>char *Swig_file_filename(const String_or_char *filename)</tt></b>
- <blockquote>
- Returns the filename without any leading directories. For instance, if the filename is "/bar/spam/foo.txt", it
- returns "foo.txt". This function is aware of local naming conventions on the machine (e.g., forward versus back slashes on Unix and Windows). The result is stored in a static variable. If you need to save the value, make a copy.
- </blockquote>
- <p>
- <b><tt>char *Swig_file_dirname(const String_or_char *filename)</tt></b>
- <blockquote>
- Returns the directory name (if any). For instance, if the filename is "/bar/spam/foo.txt", it
- returns "/bar/spam/". This function is aware of local naming conventions on the machine (e.g., forward versus back slashes on Unix and Windows). The result is stored in a static variable. If you need to save the value, make a copy.
- </blockquote>
- <p>
- <b><tt>SWIG_FILE_DELIMITER</tt></b>
- <blockquote>
- This macro contains the file delimiter string for the local machine. On Unix it is "/", on Windows it is "\\".
- </blockquote>
- </body>
- </html>