lordtet
d6465ade55
Instead of passing function pointers, we're passing structs with context now. The idea is the same, I/O functions require some struct with a function pointer and some generic memory that only the output device cares about. I/O just calls it. VGA has been reworked to accomodate this change, as well as default outputs being created for low-overhead use (such as interrupt handlers).
24 lines
614 B
C
24 lines
614 B
C
/* io.h
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* In/Out
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*
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* Common library for handling user i/o. Aims to be mechanic agnostic, and instead
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* focus on implementing generic functions to format and manipulate data.
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*/
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#ifndef IO_H
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#define IO_H
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#include <stdint.h>
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typedef struct char_writer_s char_writer_t;
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struct char_writer_s {
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int (*putChar)(void* ctx, char out);
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void* ctx;
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};
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int putc(char_writer_t*, char);
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int print(char_writer_t*, const char*);
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int println(char_writer_t*, const char*);
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int printhex(char_writer_t*, uint32_t);
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int prindec(char_writer_t*, uint32_t out);
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int printf(char_writer_t*, const char* fmt, ...);
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#endif
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