| Description |
reads the number of bytes designated by "size" into "variable" from the file specified by "file.descriptor" returned by a previous call to "%open()", "%creat()" or "dup()" converting each byte into two ASCII hexadecimal characters.
A string of a size at least equal to 2 * "size" must have been assigned to "variable" before the call by either an explicit assignment (e.g. buffer=space(1000)) or by the "char" reserve statement, otherwise data will be truncated.
The function returns the number of bytes actually read or "-1" if an error occurred. If less than 2 * "size" bytes are returned, the content of the string beyond is undefined, as is usual in C. This function is the opposite of "%whex()".
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