diff --git a/.vscode/settings.json b/.vscode/settings.json index 288d5f0..0300e4e 100644 --- a/.vscode/settings.json +++ b/.vscode/settings.json @@ -1,5 +1,6 @@ { "files.associations": { - "types.h": "c" + "types.h": "c", + "vga_text_mode.h": "c" } } diff --git a/bin/shade.bin b/bin/shade.bin index 1178865..7881844 100755 Binary files a/bin/shade.bin and b/bin/shade.bin differ diff --git a/bin/shade.iso b/bin/shade.iso index 90b3520..fba6d90 100644 Binary files a/bin/shade.iso and b/bin/shade.iso differ diff --git a/include/printf.h b/include/printf.h new file mode 100644 index 0000000..e58f666 --- /dev/null +++ b/include/printf.h @@ -0,0 +1,117 @@ +/////////////////////////////////////////////////////////////////////////////// +// \author (c) Marco Paland (info@paland.com) +// 2014-2019, PALANDesign Hannover, Germany +// +// \license The MIT License (MIT) +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE. +// +// \brief Tiny printf, sprintf and snprintf implementation, optimized for speed on +// embedded systems with a very limited resources. +// Use this instead of bloated standard/newlib printf. +// These routines are thread safe and reentrant. +// +/////////////////////////////////////////////////////////////////////////////// + +#ifndef _PRINTF_H_ +#define _PRINTF_H_ + +#include +#include + + +#ifdef __cplusplus +extern "C" { +#endif + + +/** + * Output a character to a custom device like UART, used by the printf() function + * This function is declared here only. You have to write your custom implementation somewhere + * \param character Character to output + */ +void _putchar(char character); + + +/** + * Tiny printf implementation + * You have to implement _putchar if you use printf() + * To avoid conflicts with the regular printf() API it is overridden by macro defines + * and internal underscore-appended functions like printf_() are used + * \param format A string that specifies the format of the output + * \return The number of characters that are written into the array, not counting the terminating null character + */ +#define printf printf_ +int printf_(const char* format, ...); + + +/** + * Tiny sprintf implementation + * Due to security reasons (buffer overflow) YOU SHOULD CONSIDER USING (V)SNPRINTF INSTEAD! + * \param buffer A pointer to the buffer where to store the formatted string. MUST be big enough to store the output! + * \param format A string that specifies the format of the output + * \return The number of characters that are WRITTEN into the buffer, not counting the terminating null character + */ +#define sprintf sprintf_ +int sprintf_(char* buffer, const char* format, ...); + + +/** + * Tiny snprintf/vsnprintf implementation + * \param buffer A pointer to the buffer where to store the formatted string + * \param count The maximum number of characters to store in the buffer, including a terminating null character + * \param format A string that specifies the format of the output + * \param va A value identifying a variable arguments list + * \return The number of characters that COULD have been written into the buffer, not counting the terminating + * null character. A value equal or larger than count indicates truncation. Only when the returned value + * is non-negative and less than count, the string has been completely written. + */ +#define snprintf snprintf_ +#define vsnprintf vsnprintf_ +int snprintf_(char* buffer, size_t count, const char* format, ...); +int vsnprintf_(char* buffer, size_t count, const char* format, va_list va); + + +/** + * Tiny vprintf implementation + * \param format A string that specifies the format of the output + * \param va A value identifying a variable arguments list + * \return The number of characters that are WRITTEN into the buffer, not counting the terminating null character + */ +#define vprintf vprintf_ +int vprintf_(const char* format, va_list va); + + +/** + * printf with output function + * You may use this as dynamic alternative to printf() with its fixed _putchar() output + * \param out An output function which takes one character and an argument pointer + * \param arg An argument pointer for user data passed to output function + * \param format A string that specifies the format of the output + * \return The number of characters that are sent to the output function, not counting the terminating null character + */ +int fctprintf(void (*out)(char character, void* arg), void* arg, const char* format, ...); + + +#ifdef __cplusplus +} +#endif + + +#endif // _PRINTF_H_ \ No newline at end of file diff --git a/include/shade/print.h b/include/shade/platform/drivers/vga_text_mode.h similarity index 64% rename from include/shade/print.h rename to include/shade/platform/drivers/vga_text_mode.h index edd8a9e..deb00fb 100644 --- a/include/shade/print.h +++ b/include/shade/platform/drivers/vga_text_mode.h @@ -3,6 +3,8 @@ #define REG_SCREEN_CTRL 0x3d4 #define REG_SCREEN_DATA 0x3d5 +#include + enum { PRINT_COLOR_BLACK = 0, PRINT_COLOR_BLUE = 1, @@ -22,6 +24,11 @@ enum { PRINT_COLOR_WHITE = 15, }; +typedef struct ansi_code_struct { + int flag; + int color; +} ansi_color_code_t; + const static int NUM_COLS = 80; const static int NUM_ROWS = 25; @@ -30,15 +37,32 @@ struct Char { char color; }; +static bool is_parsing_ansi_string = false; +static bool ansi_string_found_bracket = false; + +static bool ansi_string_found_semi = false; +static bool ansi_string_found_m = false; + +static bool ansi_string_found_number = false; + +static int _flag = 0; +static int _color = 0; + +static int working_num = 0; + void clear_row(int row); void clear_all(); void print_newline(); void print_char(char character); +void _print_char(char character); void print_set_color(char foreground, char background); void print_str(char* str); void set_cursor_pos(int col, int row); void kernel_msg_ok(char* msg); + +void handle_ansi_code(ansi_color_code_t code); + #endif \ No newline at end of file diff --git a/include/shade/util.h b/include/shade/util.h index 7ffca01..9985e39 100644 --- a/include/shade/util.h +++ b/include/shade/util.h @@ -1,6 +1,9 @@ #ifndef UTIL_H #define UTIL_H +#define IS_DIGIT(x) (x == '0' || x == '1' || x == '2' || x == '3' || x == '4' || x == '5' || x == '6' || x == '7' || x == '8' || x == '9') +#define IS_HEX(x) (IS_DIGIT(x) || x == 'a' || x == 'b' || x == 'c' || x == 'd' || x == 'e' || x == 'f') + void memcpy(char *source, char *dest, int nbytes); void memset(char *dest, char val, int len); diff --git a/obj/kernel/kernel.o b/obj/kernel/kernel.o index aec1acb..e299fec 100644 Binary files a/obj/kernel/kernel.o and b/obj/kernel/kernel.o differ diff --git a/obj/kernel/print.o b/obj/kernel/print.o deleted file mode 100644 index 34e5753..0000000 Binary files a/obj/kernel/print.o and /dev/null differ diff --git a/src/boot/entry64.asm b/src/boot/entry64.asm index 2d10b51..f35259b 100644 --- a/src/boot/entry64.asm +++ b/src/boot/entry64.asm @@ -13,5 +13,5 @@ entry_x64: mov gs, ax call kmain ; Jump into C kernel entry - + hlt \ No newline at end of file diff --git a/src/kernel/kernel.c b/src/kernel/kernel.c index eaa1d47..0a7720b 100644 --- a/src/kernel/kernel.c +++ b/src/kernel/kernel.c @@ -1,31 +1,22 @@ #include -#include +#include #include #include +#include void kernel_welcome() { - print_str("Welcome to "); + printf("Welcome to "); print_set_color(PRINT_COLOR_CYAN, PRINT_COLOR_BLACK); - print_str("Shade"); + printf("Shade"); print_set_color(PRINT_COLOR_WHITE, PRINT_COLOR_BLACK); - print_str("!\n"); - - print_str("shadeOS kernel version "); - + printf("!\nshadeOS kernel version "); print_set_color(PRINT_COLOR_YELLOW, PRINT_COLOR_BLACK); - print_str("0.2.2"); - + printf("0.2.2\n"); print_set_color(PRINT_COLOR_WHITE, PRINT_COLOR_BLACK); - print_newline(); - - print_str("Running on "); - + printf("Running on "); print_set_color(PRINT_COLOR_YELLOW, PRINT_COLOR_BLACK); - print_str("shade-development"); - + printf("shade-development\n"); print_set_color(PRINT_COLOR_WHITE, PRINT_COLOR_BLACK); - - print_newline(); } // kMain @@ -41,14 +32,16 @@ void kmain() { kernel_msg_ok("Initialized display successfully\n"); kernel_welcome(); - print_str("Copyright (c) e3team 2022. All rights reserved.\n"); - print_str("This program is provided \"as-is\" and no express or implied warranty is provided.\n"); - print_str("The full license can be found at /sys/LICENCE on this system or ./LICENCE in the source tree.\n"); + printf("Copyright (c) e3team 2022. All rights reserved.\n"); + printf("This program is provided \"as-is\" and no express or implied warranty is provided.\n"); + printf("The full license can be found at /sys/LICENCE on this system or ./LICENCE in the source tree.\n"); pic_remap(0x20, 0x28); idt_assemble(); - kernel_msg_ok("Enabled interrupts"); + kernel_msg_ok("Enabled interrupts\n"); __asm__ __volatile__("int $2"); + printf("ANSI code test: double \x1b[3;31m \x1b[31m \x1b[12m \x1b[0m\n"); + for (;;) {} } \ No newline at end of file diff --git a/src/kernel/platform/drivers/vga_text_mode.c b/src/kernel/platform/drivers/vga_text_mode.c new file mode 100644 index 0000000..8d77f12 --- /dev/null +++ b/src/kernel/platform/drivers/vga_text_mode.c @@ -0,0 +1,328 @@ +#include +#include +#include + +int row = 0; +int col = 0; +char color = PRINT_COLOR_WHITE | PRINT_COLOR_BLACK << 4; + +void clear_row(int row) { + struct Char* buffer = (struct Char*) 0xb8000; + + struct Char empty = (struct Char) { + character: ' ', + color: color, + }; + + for (int x = 0; x < NUM_COLS; x++) { + buffer[x + NUM_COLS * row] = empty; + } + set_cursor_pos(col, row); +} + +void clear_all() { + for (int i = 0; i < NUM_ROWS; i++) { + clear_row(i); + } + set_cursor_pos(col, row); +} + +void print_newline() { + struct Char* buffer = (struct Char*) 0xb8000; + + col = 0; + + if (row < NUM_ROWS - 1) { + row++; + return; + } + + for (int row = 1; row < NUM_ROWS; row++) { + for (int col = 0; col < NUM_COLS; col++) { + struct Char character = buffer[col + NUM_COLS * row]; + buffer[col + NUM_COLS * (row - 1)] = character; + } + } + + clear_row(NUM_COLS - 1); + set_cursor_pos(col, row); +} + +bool is_hexchar(char character) { + switch (character) { + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + case 'a': + case 'b': + case 'c': + case 'd': + case 'e': + case 'f': + return true; + break; + default: + return false; + break; + } +} + +bool is_digit(char ch) { + return (ch >= '0') && (ch <= '9'); +} + +unsigned int _atoi(const char** str) { + unsigned int i = 0U; + while (is_digit(**str)) { + i = i * 10U + (unsigned int)(*((*str)++) - '0'); + } + return i; +} + + + +void print_char(char character) { + // ANSI parsing + // 1. is the current char \x1b? + if (character == '\x1b') { + // are we already printing an ansi string? + if (is_parsing_ansi_string) { + // string is invalid now + is_parsing_ansi_string = false; + return; + } else { + // no! set flag and continue + is_parsing_ansi_string = true; + return; + } + } + + // 2. are we working on an ansi string right now? + if (is_parsing_ansi_string) { + if (!ansi_string_found_bracket && character != '[') { + // string is invalid, stop + is_parsing_ansi_string = false; + ansi_string_found_bracket = false; + working_num = 0; + ansi_string_found_m = false; + ansi_string_found_semi = false; + ansi_string_found_number = false; + _flag = 0; + _color = 0; + _print_char(character); + return; + } else { + // found bracket + ansi_string_found_bracket = true; + return; + } + if (ansi_string_found_bracket && !(ansi_string_found_semi || ansi_string_found_m)) { + // looking for flag OR color, idk yet + if (ansi_string_found_number) { + if (character == 'm') { + if (ansi_string_found_m) { + // invalid + is_parsing_ansi_string = false; + ansi_string_found_bracket = false; + working_num = 0; + ansi_string_found_m = false; + ansi_string_found_semi = false; + ansi_string_found_number = false; + _flag = 0; + _color = 0; + _print_char(character); + return; + } + ansi_string_found_m = true; + // string is done + _color = working_num; + ansi_color_code_t code; + code.flag = _flag; + code.color = color; + handle_ansi_code(code); + is_parsing_ansi_string = false; + ansi_string_found_bracket = false; + working_num = 0; + ansi_string_found_m = false; + ansi_string_found_semi = false; + ansi_string_found_number = false; + _flag = 0; + _color = 0; + return; + } else if (character == ';') { + if (ansi_string_found_semi) { + // invalid + is_parsing_ansi_string = false; + ansi_string_found_bracket = false; + working_num = 0; + ansi_string_found_m = false; + ansi_string_found_semi = false; + ansi_string_found_number = false; + _flag = 0; + _color = 0; + _print_char(character); + return; + } + _flag = working_num; + working_num = 0; + ansi_string_found_number = false; + ansi_string_found_semi = true; + return; + } + } + if (!is_digit(character)) { + // not a digit, print out and discard existing string + is_parsing_ansi_string = false; + ansi_string_found_bracket = false; + working_num = 0; + ansi_string_found_m = false; + ansi_string_found_semi = false; + ansi_string_found_number = false; + _print_char(character); + return; + } else { + // is digit, add to working + working_num *= 10; + working_num += _atoi(character); + ansi_string_found_number = true; + } + } + if (ansi_string_found_bracket && ansi_string_found_semi && !ansi_string_found_m) { + if (ansi_string_found_number) { + if (character == 'm') { + if (ansi_string_found_m) { + // invalid + is_parsing_ansi_string = false; + ansi_string_found_bracket = false; + working_num = 0; + ansi_string_found_m = false; + ansi_string_found_semi = false; + ansi_string_found_number = false; + _flag = 0; + _color = 0; + _print_char(character); + return; + } + ansi_string_found_m = true; + // string is done + _color = working_num; + ansi_color_code_t code; + code.flag = _flag; + code.color = _color; + handle_ansi_code(code); + is_parsing_ansi_string = false; + ansi_string_found_bracket = false; + working_num = 0; + ansi_string_found_m = false; + ansi_string_found_semi = false; + ansi_string_found_number = false; + _flag = 0; + _color = 0; + return; + } + if (!_is_digit(character)) { + // not a digit, print out and discard existing string + is_parsing_ansi_string = false; + ansi_string_found_bracket = false; + working_num = 0; + ansi_string_found_m = false; + ansi_string_found_semi = false; + ansi_string_found_number = false; + _flag = 0; + _color = 0; + _print_char(character); + return; + } else { + // is digit, add to working + working_num *= 10; + working_num += _atoi(character); + ansi_string_found_number = true; + } + } + } + } + + _print_char(character); + return; +} + +void _print_char(char character) { + struct Char* buffer = (struct Char*) 0xb8000; + + if (character == '\n') { + print_newline(); + return; + } + + if (col > NUM_COLS) { + print_newline(); + } + + struct Char cr = (struct Char) { + character: character, + color: color, + }; + buffer[col + NUM_COLS * row] = cr; + + col++; + set_cursor_pos(col, row); +} + +void print_str(char* str) { + for (int i = 0; 1; i++) { + char character = (char) str[i]; + + if (character == '\0') { + return; + } + + print_char(character); + } +} + +void print_set_color(char foreground, char background) { + color = foreground + (background << 4); +} + +void set_cursor_pos(int col, int row) { + int offset = col + NUM_COLS * row; + outb(REG_SCREEN_CTRL, 14); + outb(REG_SCREEN_DATA, (unsigned char)(offset >> 8)); + outb(REG_SCREEN_CTRL, 15); + outb(REG_SCREEN_DATA, (unsigned char)(offset & 0xff)); +} + +void kernel_msg_ok(char* msg) { + char ok_p1[] = "[ "; + char ok_p2[] = "OK "; + char ok_p3[] = "] "; + + print_set_color(PRINT_COLOR_WHITE, PRINT_COLOR_BLACK); + print_str(ok_p1); + + print_set_color(PRINT_COLOR_GREEN, PRINT_COLOR_BLACK); + print_str(ok_p2); + + print_set_color(PRINT_COLOR_WHITE, PRINT_COLOR_BLACK); + print_str(ok_p3); + print_str(msg); +} + + +void handle_ansi_code(ansi_color_code_t code) { + char s[50]; + itoa(code.flag, s); + print_str("ansi code: ["); + print_str(s); + print_str(";"); + itoa(code.color, s); + print_str(s); + print_str("m found\n"); +} \ No newline at end of file diff --git a/src/kernel/platform/interrupts/isr.c b/src/kernel/platform/interrupts/isr.c index c6517ce..8476771 100644 --- a/src/kernel/platform/interrupts/isr.c +++ b/src/kernel/platform/interrupts/isr.c @@ -1,21 +1,11 @@ -#include +#include #include void exception_handler(isr_xframe_t frame) { - char s[256]; - itoa(err_count, s); - print_str(" "); - print_str(s); - print_str(": cpu: check_exception "); - itoa(frame.base_frame.vector, s); - print_str(s); - print_str(" err_code => "); - itoa(frame.base_frame.error_code, s); - print_str(s); - print_str("\n"); + printf(" %i: cpu: check_exception 0x%x err_code => %i\n", err_count, frame.base_frame.vector, frame.base_frame.error_code); err_count++; if (err_count > ERR_MAX) { - print_str("cpu: ierr hit err_max, halt"); + printf("cpu: ierr hit err_max, halt\n"); __asm__ __volatile__("cli; hlt"); } } \ No newline at end of file diff --git a/src/kernel/print.c b/src/kernel/print.c deleted file mode 100644 index fb4213a..0000000 --- a/src/kernel/print.c +++ /dev/null @@ -1,110 +0,0 @@ -#include -#include - -int row = 0; -int col = 0; -char color = PRINT_COLOR_WHITE | PRINT_COLOR_BLACK << 4; - -void clear_row(int row) { - struct Char* buffer = (struct Char*) 0xb8000; - - struct Char empty = (struct Char) { - character: ' ', - color: color, - }; - - for (int x = 0; x < NUM_COLS; x++) { - buffer[x + NUM_COLS * row] = empty; - } - set_cursor_pos(col, row); -} - -void clear_all() { - for (int i = 0; i < NUM_ROWS; i++) { - clear_row(i); - } - set_cursor_pos(col, row); -} - -void print_newline() { - struct Char* buffer = (struct Char*) 0xb8000; - - col = 0; - - if (row < NUM_ROWS - 1) { - row++; - return; - } - - for (int row = 1; row < NUM_ROWS; row++) { - for (int col = 0; col < NUM_COLS; col++) { - struct Char character = buffer[col + NUM_COLS * row]; - buffer[col + NUM_COLS * (row - 1)] = character; - } - } - - clear_row(NUM_COLS - 1); - set_cursor_pos(col, row); -} - -void print_char(char character) { - struct Char* buffer = (struct Char*) 0xb8000; - - if (character == '\n') { - print_newline(); - return; - } - - if (col > NUM_COLS) { - print_newline(); - } - - struct Char cr = (struct Char) { - character: character, - color: color, - }; - buffer[col + NUM_COLS * row] = cr; - - col++; - set_cursor_pos(col, row); -} - -void print_str(char* str) { - for (int i = 0; 1; i++) { - char character = (char) str[i]; - - if (character == '\0') { - return; - } - - print_char(character); - } -} - -void print_set_color(char foreground, char background) { - color = foreground + (background << 4); -} - -void set_cursor_pos(int col, int row) { - int offset = col + NUM_COLS * row; - outb(REG_SCREEN_CTRL, 14); - outb(REG_SCREEN_DATA, (unsigned char)(offset >> 8)); - outb(REG_SCREEN_CTRL, 15); - outb(REG_SCREEN_DATA, (unsigned char)(offset & 0xff)); -} - -void kernel_msg_ok(char* msg) { - char ok_p1[] = "[ "; - char ok_p2[] = "OK "; - char ok_p3[] = "] "; - - print_set_color(PRINT_COLOR_WHITE, PRINT_COLOR_BLACK); - print_str(ok_p1); - - print_set_color(PRINT_COLOR_GREEN, PRINT_COLOR_BLACK); - print_str(ok_p2); - - print_set_color(PRINT_COLOR_WHITE, PRINT_COLOR_BLACK); - print_str(ok_p3); - print_str(msg); -} \ No newline at end of file diff --git a/src/libc/printf.c b/src/libc/printf.c new file mode 100644 index 0000000..916c9d9 --- /dev/null +++ b/src/libc/printf.c @@ -0,0 +1,923 @@ + + +/////////////////////////////////////////////////////////////////////////////// +// \author (c) Marco Paland (info@paland.com) +// 2014-2019, PALANDesign Hannover, Germany +// +// \license The MIT License (MIT) +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE. +// +// \brief Tiny printf, sprintf and (v)snprintf implementation, optimized for speed on +// embedded systems with a very limited resources. These routines are thread +// safe and reentrant! +// Use this instead of the bloated standard/newlib printf cause these use +// malloc for printf (and may not be thread safe). +// +/////////////////////////////////////////////////////////////////////////////// + +#include +#include +#include // c0repwn3r: implmenent _putchar with shade's VGA text driver +#include // c0repwn3r + +#include "printf.h" + +// c0repwn3r: implement _putchar with shade's VGA text driver, and ANSI support +void _putchar(char character) { + print_char(character); +} +// end: implement _putchar with shade's VGA text driver, and ANSI support + +// define this globally (e.g. gcc -DPRINTF_INCLUDE_CONFIG_H ...) to include the +// printf_config.h header file +// default: undefined +#ifdef PRINTF_INCLUDE_CONFIG_H +#include "printf_config.h" +#endif + + +// 'ntoa' conversion buffer size, this must be big enough to hold one converted +// numeric number including padded zeros (dynamically created on stack) +// default: 32 byte +#ifndef PRINTF_NTOA_BUFFER_SIZE +#define PRINTF_NTOA_BUFFER_SIZE 32U +#endif + +// 'ftoa' conversion buffer size, this must be big enough to hold one converted +// float number including padded zeros (dynamically created on stack) +// default: 32 byte +#ifndef PRINTF_FTOA_BUFFER_SIZE +#define PRINTF_FTOA_BUFFER_SIZE 32U +#endif + +// support for the floating point type (%f) +// default: activated +#ifndef PRINTF_DISABLE_SUPPORT_FLOAT +#define PRINTF_SUPPORT_FLOAT +#endif + +// support for exponential floating point notation (%e/%g) +// default: activated +#ifndef PRINTF_DISABLE_SUPPORT_EXPONENTIAL +#define PRINTF_SUPPORT_EXPONENTIAL +#endif + +// define the default floating point precision +// default: 6 digits +#ifndef PRINTF_DEFAULT_FLOAT_PRECISION +#define PRINTF_DEFAULT_FLOAT_PRECISION 6U +#endif + +// define the largest float suitable to print with %f +// default: 1e9 +#ifndef PRINTF_MAX_FLOAT +#define PRINTF_MAX_FLOAT 1e9 +#endif + +// support for the long long types (%llu or %p) +// default: activated +#ifndef PRINTF_DISABLE_SUPPORT_LONG_LONG +#define PRINTF_SUPPORT_LONG_LONG +#endif + +// support for the ptrdiff_t type (%t) +// ptrdiff_t is normally defined in as long or long long type +// default: activated +#ifndef PRINTF_DISABLE_SUPPORT_PTRDIFF_T +#define PRINTF_SUPPORT_PTRDIFF_T +#endif + +/////////////////////////////////////////////////////////////////////////////// + +// internal flag definitions +#define FLAGS_ZEROPAD (1U << 0U) +#define FLAGS_LEFT (1U << 1U) +#define FLAGS_PLUS (1U << 2U) +#define FLAGS_SPACE (1U << 3U) +#define FLAGS_HASH (1U << 4U) +#define FLAGS_UPPERCASE (1U << 5U) +#define FLAGS_CHAR (1U << 6U) +#define FLAGS_SHORT (1U << 7U) +#define FLAGS_LONG (1U << 8U) +#define FLAGS_LONG_LONG (1U << 9U) +#define FLAGS_PRECISION (1U << 10U) +#define FLAGS_ADAPT_EXP (1U << 11U) + + +// import float.h for DBL_MAX +#if defined(PRINTF_SUPPORT_FLOAT) +#include +#endif + + +// output function type +typedef void (*out_fct_type)(char character, void* buffer, size_t idx, size_t maxlen); + + +// wrapper (used as buffer) for output function type +typedef struct { + void (*fct)(char character, void* arg); + void* arg; +} out_fct_wrap_type; + + +// internal buffer output +static inline void _out_buffer(char character, void* buffer, size_t idx, size_t maxlen) +{ + if (idx < maxlen) { + ((char*)buffer)[idx] = character; + } +} + + +// internal null output +static inline void _out_null(char character, void* buffer, size_t idx, size_t maxlen) +{ + (void)character; (void)buffer; (void)idx; (void)maxlen; +} + + +// internal _putchar wrapper +static inline void _out_char(char character, void* buffer, size_t idx, size_t maxlen) +{ + (void)buffer; (void)idx; (void)maxlen; + if (character) { + _putchar(character); + } +} + + +// internal output function wrapper +static inline void _out_fct(char character, void* buffer, size_t idx, size_t maxlen) +{ + (void)idx; (void)maxlen; + if (character) { + // buffer is the output fct pointer + ((out_fct_wrap_type*)buffer)->fct(character, ((out_fct_wrap_type*)buffer)->arg); + } +} + + +// internal secure strlen +// \return The length of the string (excluding the terminating 0) limited by 'maxsize' +static inline unsigned int _strnlen_s(const char* str, size_t maxsize) +{ + const char* s; + for (s = str; *s && maxsize--; ++s); + return (unsigned int)(s - str); +} + + +// internal test if char is a digit (0-9) +// \return true if char is a digit +static inline bool _is_digit(char ch) +{ + return (ch >= '0') && (ch <= '9'); +} + + +// internal ASCII string to unsigned int conversion +static unsigned int _atoi(const char** str) +{ + unsigned int i = 0U; + while (_is_digit(**str)) { + i = i * 10U + (unsigned int)(*((*str)++) - '0'); + } + return i; +} + + +// output the specified string in reverse, taking care of any zero-padding +static size_t _out_rev(out_fct_type out, char* buffer, size_t idx, size_t maxlen, const char* buf, size_t len, unsigned int width, unsigned int flags) +{ + const size_t start_idx = idx; + + // pad spaces up to given width + if (!(flags & FLAGS_LEFT) && !(flags & FLAGS_ZEROPAD)) { + for (size_t i = len; i < width; i++) { + out(' ', buffer, idx++, maxlen); + } + } + + // reverse string + while (len) { + out(buf[--len], buffer, idx++, maxlen); + } + + // append pad spaces up to given width + if (flags & FLAGS_LEFT) { + while (idx - start_idx < width) { + out(' ', buffer, idx++, maxlen); + } + } + + return idx; +} + + +// internal itoa format +static size_t _ntoa_format(out_fct_type out, char* buffer, size_t idx, size_t maxlen, char* buf, size_t len, bool negative, unsigned int base, unsigned int prec, unsigned int width, unsigned int flags) +{ + // pad leading zeros + if (!(flags & FLAGS_LEFT)) { + if (width && (flags & FLAGS_ZEROPAD) && (negative || (flags & (FLAGS_PLUS | FLAGS_SPACE)))) { + width--; + } + while ((len < prec) && (len < PRINTF_NTOA_BUFFER_SIZE)) { + buf[len++] = '0'; + } + while ((flags & FLAGS_ZEROPAD) && (len < width) && (len < PRINTF_NTOA_BUFFER_SIZE)) { + buf[len++] = '0'; + } + } + + // handle hash + if (flags & FLAGS_HASH) { + if (!(flags & FLAGS_PRECISION) && len && ((len == prec) || (len == width))) { + len--; + if (len && (base == 16U)) { + len--; + } + } + if ((base == 16U) && !(flags & FLAGS_UPPERCASE) && (len < PRINTF_NTOA_BUFFER_SIZE)) { + buf[len++] = 'x'; + } + else if ((base == 16U) && (flags & FLAGS_UPPERCASE) && (len < PRINTF_NTOA_BUFFER_SIZE)) { + buf[len++] = 'X'; + } + else if ((base == 2U) && (len < PRINTF_NTOA_BUFFER_SIZE)) { + buf[len++] = 'b'; + } + if (len < PRINTF_NTOA_BUFFER_SIZE) { + buf[len++] = '0'; + } + } + + if (len < PRINTF_NTOA_BUFFER_SIZE) { + if (negative) { + buf[len++] = '-'; + } + else if (flags & FLAGS_PLUS) { + buf[len++] = '+'; // ignore the space if the '+' exists + } + else if (flags & FLAGS_SPACE) { + buf[len++] = ' '; + } + } + + return _out_rev(out, buffer, idx, maxlen, buf, len, width, flags); +} + + +// internal itoa for 'long' type +static size_t _ntoa_long(out_fct_type out, char* buffer, size_t idx, size_t maxlen, unsigned long value, bool negative, unsigned long base, unsigned int prec, unsigned int width, unsigned int flags) +{ + char buf[PRINTF_NTOA_BUFFER_SIZE]; + size_t len = 0U; + + // no hash for 0 values + if (!value) { + flags &= ~FLAGS_HASH; + } + + // write if precision != 0 and value is != 0 + if (!(flags & FLAGS_PRECISION) || value) { + do { + const char digit = (char)(value % base); + buf[len++] = digit < 10 ? '0' + digit : (flags & FLAGS_UPPERCASE ? 'A' : 'a') + digit - 10; + value /= base; + } while (value && (len < PRINTF_NTOA_BUFFER_SIZE)); + } + + return _ntoa_format(out, buffer, idx, maxlen, buf, len, negative, (unsigned int)base, prec, width, flags); +} + + +// internal itoa for 'long long' type +#if defined(PRINTF_SUPPORT_LONG_LONG) +static size_t _ntoa_long_long(out_fct_type out, char* buffer, size_t idx, size_t maxlen, unsigned long long value, bool negative, unsigned long long base, unsigned int prec, unsigned int width, unsigned int flags) +{ + char buf[PRINTF_NTOA_BUFFER_SIZE]; + size_t len = 0U; + + // no hash for 0 values + if (!value) { + flags &= ~FLAGS_HASH; + } + + // write if precision != 0 and value is != 0 + if (!(flags & FLAGS_PRECISION) || value) { + do { + const char digit = (char)(value % base); + buf[len++] = digit < 10 ? '0' + digit : (flags & FLAGS_UPPERCASE ? 'A' : 'a') + digit - 10; + value /= base; + } while (value && (len < PRINTF_NTOA_BUFFER_SIZE)); + } + + return _ntoa_format(out, buffer, idx, maxlen, buf, len, negative, (unsigned int)base, prec, width, flags); +} +#endif // PRINTF_SUPPORT_LONG_LONG + + +#if defined(PRINTF_SUPPORT_FLOAT) + +#if defined(PRINTF_SUPPORT_EXPONENTIAL) +// forward declaration so that _ftoa can switch to exp notation for values > PRINTF_MAX_FLOAT +static size_t _etoa(out_fct_type out, char* buffer, size_t idx, size_t maxlen, double value, unsigned int prec, unsigned int width, unsigned int flags); +#endif + + +// internal ftoa for fixed decimal floating point +static size_t _ftoa(out_fct_type out, char* buffer, size_t idx, size_t maxlen, double value, unsigned int prec, unsigned int width, unsigned int flags) +{ + char buf[PRINTF_FTOA_BUFFER_SIZE]; + size_t len = 0U; + double diff = 0.0; + + // powers of 10 + static const double pow10[] = { 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000 }; + + // test for special values + if (value != value) + return _out_rev(out, buffer, idx, maxlen, "nan", 3, width, flags); + if (value < -DBL_MAX) + return _out_rev(out, buffer, idx, maxlen, "fni-", 4, width, flags); + if (value > DBL_MAX) + return _out_rev(out, buffer, idx, maxlen, (flags & FLAGS_PLUS) ? "fni+" : "fni", (flags & FLAGS_PLUS) ? 4U : 3U, width, flags); + + // test for very large values + // standard printf behavior is to print EVERY whole number digit -- which could be 100s of characters overflowing your buffers == bad + if ((value > PRINTF_MAX_FLOAT) || (value < -PRINTF_MAX_FLOAT)) { +#if defined(PRINTF_SUPPORT_EXPONENTIAL) + return _etoa(out, buffer, idx, maxlen, value, prec, width, flags); +#else + return 0U; +#endif + } + + // test for negative + bool negative = false; + if (value < 0) { + negative = true; + value = 0 - value; + } + + // set default precision, if not set explicitly + if (!(flags & FLAGS_PRECISION)) { + prec = PRINTF_DEFAULT_FLOAT_PRECISION; + } + // limit precision to 9, cause a prec >= 10 can lead to overflow errors + while ((len < PRINTF_FTOA_BUFFER_SIZE) && (prec > 9U)) { + buf[len++] = '0'; + prec--; + } + + int whole = (int)value; + double tmp = (value - whole) * pow10[prec]; + unsigned long frac = (unsigned long)tmp; + diff = tmp - frac; + + if (diff > 0.5) { + ++frac; + // handle rollover, e.g. case 0.99 with prec 1 is 1.0 + if (frac >= pow10[prec]) { + frac = 0; + ++whole; + } + } + else if (diff < 0.5) { + } + else if ((frac == 0U) || (frac & 1U)) { + // if halfway, round up if odd OR if last digit is 0 + ++frac; + } + + if (prec == 0U) { + diff = value - (double)whole; + if ((!(diff < 0.5) || (diff > 0.5)) && (whole & 1)) { + // exactly 0.5 and ODD, then round up + // 1.5 -> 2, but 2.5 -> 2 + ++whole; + } + } + else { + unsigned int count = prec; + // now do fractional part, as an unsigned number + while (len < PRINTF_FTOA_BUFFER_SIZE) { + --count; + buf[len++] = (char)(48U + (frac % 10U)); + if (!(frac /= 10U)) { + break; + } + } + // add extra 0s + while ((len < PRINTF_FTOA_BUFFER_SIZE) && (count-- > 0U)) { + buf[len++] = '0'; + } + if (len < PRINTF_FTOA_BUFFER_SIZE) { + // add decimal + buf[len++] = '.'; + } + } + + // do whole part, number is reversed + while (len < PRINTF_FTOA_BUFFER_SIZE) { + buf[len++] = (char)(48 + (whole % 10)); + if (!(whole /= 10)) { + break; + } + } + + // pad leading zeros + if (!(flags & FLAGS_LEFT) && (flags & FLAGS_ZEROPAD)) { + if (width && (negative || (flags & (FLAGS_PLUS | FLAGS_SPACE)))) { + width--; + } + while ((len < width) && (len < PRINTF_FTOA_BUFFER_SIZE)) { + buf[len++] = '0'; + } + } + + if (len < PRINTF_FTOA_BUFFER_SIZE) { + if (negative) { + buf[len++] = '-'; + } + else if (flags & FLAGS_PLUS) { + buf[len++] = '+'; // ignore the space if the '+' exists + } + else if (flags & FLAGS_SPACE) { + buf[len++] = ' '; + } + } + + return _out_rev(out, buffer, idx, maxlen, buf, len, width, flags); +} + + +#if defined(PRINTF_SUPPORT_EXPONENTIAL) +// internal ftoa variant for exponential floating-point type, contributed by Martijn Jasperse +static size_t _etoa(out_fct_type out, char* buffer, size_t idx, size_t maxlen, double value, unsigned int prec, unsigned int width, unsigned int flags) +{ + // check for NaN and special values + if ((value != value) || (value > DBL_MAX) || (value < -DBL_MAX)) { + return _ftoa(out, buffer, idx, maxlen, value, prec, width, flags); + } + + // determine the sign + const bool negative = value < 0; + if (negative) { + value = -value; + } + + // default precision + if (!(flags & FLAGS_PRECISION)) { + prec = PRINTF_DEFAULT_FLOAT_PRECISION; + } + + // determine the decimal exponent + // based on the algorithm by David Gay (https://www.ampl.com/netlib/fp/dtoa.c) + union { + uint64_t U; + double F; + } conv; + + conv.F = value; + int exp2 = (int)((conv.U >> 52U) & 0x07FFU) - 1023; // effectively log2 + conv.U = (conv.U & ((1ULL << 52U) - 1U)) | (1023ULL << 52U); // drop the exponent so conv.F is now in [1,2) + // now approximate log10 from the log2 integer part and an expansion of ln around 1.5 + int expval = (int)(0.1760912590558 + exp2 * 0.301029995663981 + (conv.F - 1.5) * 0.289529654602168); + // now we want to compute 10^expval but we want to be sure it won't overflow + exp2 = (int)(expval * 3.321928094887362 + 0.5); + const double z = expval * 2.302585092994046 - exp2 * 0.6931471805599453; + const double z2 = z * z; + conv.U = (uint64_t)(exp2 + 1023) << 52U; + // compute exp(z) using continued fractions, see https://en.wikipedia.org/wiki/Exponential_function#Continued_fractions_for_ex + conv.F *= 1 + 2 * z / (2 - z + (z2 / (6 + (z2 / (10 + z2 / 14))))); + // correct for rounding errors + if (value < conv.F) { + expval--; + conv.F /= 10; + } + + // the exponent format is "%+03d" and largest value is "307", so set aside 4-5 characters + unsigned int minwidth = ((expval < 100) && (expval > -100)) ? 4U : 5U; + + // in "%g" mode, "prec" is the number of *significant figures* not decimals + if (flags & FLAGS_ADAPT_EXP) { + // do we want to fall-back to "%f" mode? + if ((value >= 1e-4) && (value < 1e6)) { + if ((int)prec > expval) { + prec = (unsigned)((int)prec - expval - 1); + } + else { + prec = 0; + } + flags |= FLAGS_PRECISION; // make sure _ftoa respects precision + // no characters in exponent + minwidth = 0U; + expval = 0; + } + else { + // we use one sigfig for the whole part + if ((prec > 0) && (flags & FLAGS_PRECISION)) { + --prec; + } + } + } + + // will everything fit? + unsigned int fwidth = width; + if (width > minwidth) { + // we didn't fall-back so subtract the characters required for the exponent + fwidth -= minwidth; + } else { + // not enough characters, so go back to default sizing + fwidth = 0U; + } + if ((flags & FLAGS_LEFT) && minwidth) { + // if we're padding on the right, DON'T pad the floating part + fwidth = 0U; + } + + // rescale the float value + if (expval) { + value /= conv.F; + } + + // output the floating part + const size_t start_idx = idx; + idx = _ftoa(out, buffer, idx, maxlen, negative ? -value : value, prec, fwidth, flags & ~FLAGS_ADAPT_EXP); + + // output the exponent part + if (minwidth) { + // output the exponential symbol + out((flags & FLAGS_UPPERCASE) ? 'E' : 'e', buffer, idx++, maxlen); + // output the exponent value + idx = _ntoa_long(out, buffer, idx, maxlen, (expval < 0) ? -expval : expval, expval < 0, 10, 0, minwidth-1, FLAGS_ZEROPAD | FLAGS_PLUS); + // might need to right-pad spaces + if (flags & FLAGS_LEFT) { + while (idx - start_idx < width) out(' ', buffer, idx++, maxlen); + } + } + return idx; +} +#endif // PRINTF_SUPPORT_EXPONENTIAL +#endif // PRINTF_SUPPORT_FLOAT + + +// internal vsnprintf +static int _vsnprintf(out_fct_type out, char* buffer, const size_t maxlen, const char* format, va_list va) +{ + unsigned int flags, width, precision, n; + size_t idx = 0U; + + if (!buffer) { + // use null output function + out = _out_null; + } + + while (*format) + { + // format specifier? %[flags][width][.precision][length] + if (*format != '%') { + // no + out(*format, buffer, idx++, maxlen); + format++; + continue; + } + else { + // yes, evaluate it + format++; + } + + // evaluate flags + flags = 0U; + do { + switch (*format) { + case '0': flags |= FLAGS_ZEROPAD; format++; n = 1U; break; + case '-': flags |= FLAGS_LEFT; format++; n = 1U; break; + case '+': flags |= FLAGS_PLUS; format++; n = 1U; break; + case ' ': flags |= FLAGS_SPACE; format++; n = 1U; break; + case '#': flags |= FLAGS_HASH; format++; n = 1U; break; + default : n = 0U; break; + } + } while (n); + + // evaluate width field + width = 0U; + if (_is_digit(*format)) { + width = _atoi(&format); + } + else if (*format == '*') { + const int w = va_arg(va, int); + if (w < 0) { + flags |= FLAGS_LEFT; // reverse padding + width = (unsigned int)-w; + } + else { + width = (unsigned int)w; + } + format++; + } + + // evaluate precision field + precision = 0U; + if (*format == '.') { + flags |= FLAGS_PRECISION; + format++; + if (_is_digit(*format)) { + precision = _atoi(&format); + } + else if (*format == '*') { + const int prec = (int)va_arg(va, int); + precision = prec > 0 ? (unsigned int)prec : 0U; + format++; + } + } + + // evaluate length field + switch (*format) { + case 'l' : + flags |= FLAGS_LONG; + format++; + if (*format == 'l') { + flags |= FLAGS_LONG_LONG; + format++; + } + break; + case 'h' : + flags |= FLAGS_SHORT; + format++; + if (*format == 'h') { + flags |= FLAGS_CHAR; + format++; + } + break; +#if defined(PRINTF_SUPPORT_PTRDIFF_T) + case 't' : + flags |= (sizeof(ptrdiff_t) == sizeof(long) ? FLAGS_LONG : FLAGS_LONG_LONG); + format++; + break; +#endif + case 'j' : + flags |= (sizeof(intmax_t) == sizeof(long) ? FLAGS_LONG : FLAGS_LONG_LONG); + format++; + break; + case 'z' : + flags |= (sizeof(size_t) == sizeof(long) ? FLAGS_LONG : FLAGS_LONG_LONG); + format++; + break; + default : + break; + } + + // evaluate specifier + switch (*format) { + case 'd' : + case 'i' : + case 'u' : + case 'x' : + case 'X' : + case 'o' : + case 'b' : { + // set the base + unsigned int base; + if (*format == 'x' || *format == 'X') { + base = 16U; + } + else if (*format == 'o') { + base = 8U; + } + else if (*format == 'b') { + base = 2U; + } + else { + base = 10U; + flags &= ~FLAGS_HASH; // no hash for dec format + } + // uppercase + if (*format == 'X') { + flags |= FLAGS_UPPERCASE; + } + + // no plus or space flag for u, x, X, o, b + if ((*format != 'i') && (*format != 'd')) { + flags &= ~(FLAGS_PLUS | FLAGS_SPACE); + } + + // ignore '0' flag when precision is given + if (flags & FLAGS_PRECISION) { + flags &= ~FLAGS_ZEROPAD; + } + + // convert the integer + if ((*format == 'i') || (*format == 'd')) { + // signed + if (flags & FLAGS_LONG_LONG) { +#if defined(PRINTF_SUPPORT_LONG_LONG) + const long long value = va_arg(va, long long); + idx = _ntoa_long_long(out, buffer, idx, maxlen, (unsigned long long)(value > 0 ? value : 0 - value), value < 0, base, precision, width, flags); +#endif + } + else if (flags & FLAGS_LONG) { + const long value = va_arg(va, long); + idx = _ntoa_long(out, buffer, idx, maxlen, (unsigned long)(value > 0 ? value : 0 - value), value < 0, base, precision, width, flags); + } + else { + const int value = (flags & FLAGS_CHAR) ? (char)va_arg(va, int) : (flags & FLAGS_SHORT) ? (short int)va_arg(va, int) : va_arg(va, int); + idx = _ntoa_long(out, buffer, idx, maxlen, (unsigned int)(value > 0 ? value : 0 - value), value < 0, base, precision, width, flags); + } + } + else { + // unsigned + if (flags & FLAGS_LONG_LONG) { +#if defined(PRINTF_SUPPORT_LONG_LONG) + idx = _ntoa_long_long(out, buffer, idx, maxlen, va_arg(va, unsigned long long), false, base, precision, width, flags); +#endif + } + else if (flags & FLAGS_LONG) { + idx = _ntoa_long(out, buffer, idx, maxlen, va_arg(va, unsigned long), false, base, precision, width, flags); + } + else { + const unsigned int value = (flags & FLAGS_CHAR) ? (unsigned char)va_arg(va, unsigned int) : (flags & FLAGS_SHORT) ? (unsigned short int)va_arg(va, unsigned int) : va_arg(va, unsigned int); + idx = _ntoa_long(out, buffer, idx, maxlen, value, false, base, precision, width, flags); + } + } + format++; + break; + } +#if defined(PRINTF_SUPPORT_FLOAT) + case 'f' : + case 'F' : + if (*format == 'F') flags |= FLAGS_UPPERCASE; + idx = _ftoa(out, buffer, idx, maxlen, va_arg(va, double), precision, width, flags); + format++; + break; +#if defined(PRINTF_SUPPORT_EXPONENTIAL) + case 'e': + case 'E': + case 'g': + case 'G': + if ((*format == 'g')||(*format == 'G')) flags |= FLAGS_ADAPT_EXP; + if ((*format == 'E')||(*format == 'G')) flags |= FLAGS_UPPERCASE; + idx = _etoa(out, buffer, idx, maxlen, va_arg(va, double), precision, width, flags); + format++; + break; +#endif // PRINTF_SUPPORT_EXPONENTIAL +#endif // PRINTF_SUPPORT_FLOAT + case 'c' : { + unsigned int l = 1U; + // pre padding + if (!(flags & FLAGS_LEFT)) { + while (l++ < width) { + out(' ', buffer, idx++, maxlen); + } + } + // char output + out((char)va_arg(va, int), buffer, idx++, maxlen); + // post padding + if (flags & FLAGS_LEFT) { + while (l++ < width) { + out(' ', buffer, idx++, maxlen); + } + } + format++; + break; + } + + case 's' : { + const char* p = va_arg(va, char*); + unsigned int l = _strnlen_s(p, precision ? precision : (size_t)-1); + // pre padding + if (flags & FLAGS_PRECISION) { + l = (l < precision ? l : precision); + } + if (!(flags & FLAGS_LEFT)) { + while (l++ < width) { + out(' ', buffer, idx++, maxlen); + } + } + // string output + while ((*p != 0) && (!(flags & FLAGS_PRECISION) || precision--)) { + out(*(p++), buffer, idx++, maxlen); + } + // post padding + if (flags & FLAGS_LEFT) { + while (l++ < width) { + out(' ', buffer, idx++, maxlen); + } + } + format++; + break; + } + + case 'p' : { + width = sizeof(void*) * 2U; + flags |= FLAGS_ZEROPAD | FLAGS_UPPERCASE; +#if defined(PRINTF_SUPPORT_LONG_LONG) + const bool is_ll = sizeof(uintptr_t) == sizeof(long long); + if (is_ll) { + idx = _ntoa_long_long(out, buffer, idx, maxlen, (uintptr_t)va_arg(va, void*), false, 16U, precision, width, flags); + } + else { +#endif + idx = _ntoa_long(out, buffer, idx, maxlen, (unsigned long)((uintptr_t)va_arg(va, void*)), false, 16U, precision, width, flags); +#if defined(PRINTF_SUPPORT_LONG_LONG) + } +#endif + format++; + break; + } + + case '%' : + out('%', buffer, idx++, maxlen); + format++; + break; + + default : + out(*format, buffer, idx++, maxlen); + format++; + break; + } + } + + // termination + out((char)0, buffer, idx < maxlen ? idx : maxlen - 1U, maxlen); + + // return written chars without terminating \0 + return (int)idx; +} + + +/////////////////////////////////////////////////////////////////////////////// + +int printf_(const char* format, ...) +{ + va_list va; + va_start(va, format); + char buffer[1]; + const int ret = _vsnprintf(_out_char, buffer, (size_t)-1, format, va); + va_end(va); + return ret; +} + + +int sprintf_(char* buffer, const char* format, ...) +{ + va_list va; + va_start(va, format); + const int ret = _vsnprintf(_out_buffer, buffer, (size_t)-1, format, va); + va_end(va); + return ret; +} + + +int snprintf_(char* buffer, size_t count, const char* format, ...) +{ + va_list va; + va_start(va, format); + const int ret = _vsnprintf(_out_buffer, buffer, count, format, va); + va_end(va); + return ret; +} + + +int vprintf_(const char* format, va_list va) +{ + char buffer[1]; + return _vsnprintf(_out_char, buffer, (size_t)-1, format, va); +} + + +int vsnprintf_(char* buffer, size_t count, const char* format, va_list va) +{ + return _vsnprintf(_out_buffer, buffer, count, format, va); +} + + +int fctprintf(void (*out)(char character, void* arg), void* arg, const char* format, ...) +{ + va_list va; + va_start(va, format); + const out_fct_wrap_type out_fct_wrap = { out, arg }; + const int ret = _vsnprintf(_out_fct, (char*)(uintptr_t)&out_fct_wrap, (size_t)-1, format, va); + va_end(va); + return ret; +} \ No newline at end of file