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RealView Libraries and Floating Point Support Guide
Preface Introduction The C and C++ Libraries The C Micro-library About microlib
Differences from the default C library Building an application with microlib Using microlib Creating the stack Creating the heap Entering and exiting your program Tailoring the microlib input/output functions ISO C features missing from microlib Floating‑point SupportTailoring the microlib input/output functions
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Microlib provides a limited stdio subsystem that supports unbuffered stdin, stdout and stderr only. This enables you to use printf() for displaying diagnostic messages from your application.
In order to use high level I/O functions you must provide your own implementation of the following base functions so that they work with your own I/O device.
fputc()Implement this base function for all output functions. For example,
fprintf(),printf(),fwrite(), fputs(),puts(),putc()andputchar().fgetc()Implement this base function for all input functions. For example,
fscanf(),scanf(),fread(),read(),fgets(),gets(),getc()andgetchar().__backspace()Implement this base function if your input functions use
scanf()orfscanf().
Note
Conversions that are not supported in microlib are %lc, %ls and %a.
See Tailoring the input/output functions for more information.
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