The functions are described in detail in the reference below. The location of these files may vary on some systems. All functions that return an int indicate errors with negative values. Depending on context, zero returns may indicate success or failure.
Positive values indicate success.
Most errors other than EOF are accompanied by diagnostics on the standard error output. The predecessor of the WFDB library was originally implemented in C by George Moody and Ted Baker, based on earlier designs by Paul Schluter and Larry Siegal. Other contributors of code and ideas include Paul Albrecht, Mike Dakin, Phil Devlin, Scott Greenwald, David Israel, Roger Mark, Joe Mietus, and Warren Muldrow. Pat Hamilton and Bob Farrell contributed ports, to MacOS and Win32 respectively.