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86 lines
2.9 KiB
C
86 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#ifndef PRINT_H
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#define PRINT_H
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/*
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* Provides functions to print strings and formatted values to the screen.
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*
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* Copyright (C) 2020 Martin Whitaker.
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*/
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdint.h>
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/*
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* Prints a single character on screen at location (row,col) and returns col+1.
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*/
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int printc(int row, int col, char c);
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/*
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* Prints a string on screen starting at location (row,col) and returns the
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* next column after the string.
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*/
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int prints(int row, int col, const char *str);
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/*
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* Prints a signed decimal number on screen starting at location (row,col) in
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* a field of at least length characters, optionally padding the number with
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* leading zeros, and optionally left-justifying instead of right-justifying
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* in the field. Returns the next column after the formatted number.
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*/
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int printi(int row, int col, int value, int length, bool pad, bool left);
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/*
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* Prints an unsigned decimal number on screen starting at location (row,col)
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* in a field of at least length characters, optionally padding the number with
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* leading zeros, and optionally left-justifying instead of right-justifying in
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* the field. Returns the next column after the formatted number.
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*/
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int printu(int row, int col, uintptr_t value, int length, bool pad, bool left);
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/*
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* Prints an unsigned hexadecimal number on screen starting at location (row,col)
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* in a field of at least length characters, optionally padding the number with
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* leading zeros, and optionally left-justifying instead of right-justifying in
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* the field. Returns the next column after the formatted number.
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*/
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int printx(int row, int col, uintptr_t value, int length, bool pad, bool left);
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/*
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* Prints a K<unit> value on screen starting at location (row,col) in a field of
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* at least length characters, optionally padding the number with leading zeros,
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* and optionally left-justifying instead of right-justifying in the field. The
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* value is shown to 3 significant figures in the nearest K/M/G/T units. Returns
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* the next column after the formatted value.
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*/
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int printk(int row, int col, uintptr_t value, int length, bool pad, bool left);
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/*
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* Emulates the standard printf function. Printing starts at location (row,col).
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*
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* The conversion flags supported are:
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* - left justify
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* 0 pad with leading zeros
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*
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* The conversion specifiers supported are:
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* c character (int type)
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* s string (char* type)
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* i signed decimal integer (int type)
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* u unsigned decimal integer (uintptr_t type)
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* x unsigned hexadecimal integer (uintptr_t type)
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* k K<unit> value (scaled to K/M/G/T) (uintptr_t type)
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*
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* The only other conversion option supported is the minimum field width. This
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* may be either a literal value or '*'.
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*
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* Returns the next column after the formatted string.
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*/
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int printf(int row, int col, const char *fmt, ...);
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/*
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* The alternate form of printf.
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*/
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int vprintf(int row, int col, const char *fmt, va_list args);
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#endif // PRINT_H
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