The non-class string functions are summarized in table String functions. This includes functions for copying strings, adding strings to a system-wide hash table and creating temporary filenames. The non-class pathname functions are summarized in table Path search functions. These functions are for expanding filenames that might begin with a reference to a user’s home directory ~user or contain a shell environment variable $VAR. Also provided is a function for verifying that an external program to be invoked is available, and a function for searching the user’s path.
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Function |
Parameter |
Description |
|---|---|---|
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char* savestring (...) |
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create a new copy of the given text and return a pointer to it; the caller must eventually delete the string |
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const char* text |
the text to copy |
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const char* hashstring (...) |
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save a copy of the text in a system-wide hash table, if it isn't already there, and return a pointer to the entry. |
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const char* text |
the text to copy |
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char* tempFileName () |
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return a new, unique temporary filename; the caller must eventually delete the string |
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const char* expandPathName (...) |
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return an expanded version of the filename argument, which may start with ~, ~user or $VAR; the expanded result is in static storage and will be overwritten by the next call. |
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const char* text |
the path to expand |
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Function |
Parameter |
Description |
|---|---|---|
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int progNotFound (...) |
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flag an error and return TRUE if a program is not found |
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const char* program |
the name of the program to find in the user's path |
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const char* extramsg = 0 |
message to add to error message if the program is not found |
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const char* pathSearch (...) |
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find a file in a Unix-style path, returning the directory name |
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const char* file |
filename to find in the path |
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const char* path = 0 |
if non-zero, the path to use instead of the user's path |