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[/] [neorv32/] [trunk/] [sw/] [example/] [coremark/] [ee_printf.c] - Rev 34
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/* File : barebones/ee_printf.c This file contains an implementation of ee_printf that only requires a method to output a char to a UART without pulling in library code. This code is based on a file that contains the following: Copyright (C) 2002 Michael Ringgaard. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. Neither the name of the project nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include <core_portme.h> #include <neorv32.h> #include <stdarg.h> #include <stdbool.h> #include <string.h> #define ZEROPAD (1<<0) /* Pad with zero */ #define SIGN (1<<1) /* Unsigned/signed long */ #define PLUS (1<<2) /* Show plus */ #define SPACE (1<<3) /* Spacer */ #define LEFT (1<<4) /* Left justified */ #define HEX_PREP (1<<5) /* 0x */ #define UPPERCASE (1<<6) /* 'ABCDEF' */ #define is_digit(c) ((c) >= '0' && (c) <= '9') /* Serial initialization and new line replacement is a direct copy from mbed_retarget.cpp If the static modifier were to be removed, this part of the code would not be necessary. */ //#include "hal/serial_api.h" #if DEVICE_SERIAL static serial_t stdio_uart = { 0 }; #if MBED_CONF_PLATFORM_STDIO_CONVERT_NEWLINES static char mbed_stdio_out_prev = 0; #endif #endif /* module variable for keeping track of initialization */ static bool not_initialized = true; static void init_serial() { if (not_initialized) { not_initialized = false; #if DEVICE_SERIAL // serial_init(&stdio_uart, STDIO_UART_TX, STDIO_UART_RX); #if MBED_CONF_PLATFORM_STDIO_BAUD_RATE // serial_baud(&stdio_uart, MBED_CONF_PLATFORM_STDIO_BAUD_RATE); #endif #endif } } #define MBED_INITIALIZE_PRINT(x) { init_serial(); } #define MBED_PRINT_CHARACTER(x) { serial_putc(&stdio_uart, x); } static char *lower_digits = "0123456789abcdefghijklmnopqrstuvwxyz"; static char *upper_digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; static int ee_skip_atoi(const char **s) { int i = 0; while (is_digit(**s)) i = i*10 + *((*s)++) - '0'; return i; } static char *ee_number(char *str, long num, int base, int size, int precision, int type) { char c, sign, tmp[66]; char *dig = lower_digits; int i; if (type & UPPERCASE) dig = upper_digits; if (type & LEFT) type &= ~ZEROPAD; if (base < 2 || base > 36) return 0; c = (type & ZEROPAD) ? '0' : ' '; sign = 0; if (type & SIGN) { if (num < 0) { sign = '-'; num = -num; size--; } else if (type & PLUS) { sign = '+'; size--; } else if (type & SPACE) { sign = ' '; size--; } } if (type & HEX_PREP) { if (base == 16) size -= 2; else if (base == 8) size--; } i = 0; if (num == 0) tmp[i++] = '0'; else { while (num != 0) { tmp[i++] = dig[((unsigned long) num) % (unsigned) base]; num = ((unsigned long) num) / (unsigned) base; } } if (i > precision) precision = i; size -= precision; if (!(type & (ZEROPAD | LEFT))) while (size-- > 0) *str++ = ' '; if (sign) *str++ = sign; if (type & HEX_PREP) { if (base == 8) *str++ = '0'; else if (base == 16) { *str++ = '0'; *str++ = lower_digits[33]; } } if (!(type & LEFT)) while (size-- > 0) *str++ = c; while (i < precision--) *str++ = '0'; while (i-- > 0) *str++ = tmp[i]; while (size-- > 0) *str++ = ' '; return str; } static char *eaddr(char *str, unsigned char *addr, int size, int precision, int type) { char tmp[24]; char *dig = lower_digits; int i, len; if (type & UPPERCASE) dig = upper_digits; len = 0; for (i = 0; i < 6; i++) { if (i != 0) tmp[len++] = ':'; tmp[len++] = dig[addr[i] >> 4]; tmp[len++] = dig[addr[i] & 0x0F]; } if (!(type & LEFT)) while (len < size--) *str++ = ' '; for (i = 0; i < len; ++i) *str++ = tmp[i]; while (len < size--) *str++ = ' '; return str; } static char *iaddr(char *str, unsigned char *addr, int size, int precision, int type) { char tmp[24]; int i, n, len; len = 0; for (i = 0; i < 4; i++) { if (i != 0) tmp[len++] = '.'; n = addr[i]; if (n == 0) tmp[len++] = lower_digits[0]; else { if (n >= 100) { tmp[len++] = lower_digits[n / 100]; n = n % 100; tmp[len++] = lower_digits[n / 10]; n = n % 10; } else if (n >= 10) { tmp[len++] = lower_digits[n / 10]; n = n % 10; } tmp[len++] = lower_digits[n]; } } if (!(type & LEFT)) while (len < size--) *str++ = ' '; for (i = 0; i < len; ++i) *str++ = tmp[i]; while (len < size--) *str++ = ' '; return str; } #if defined(HAS_FLOAT) && HAS_FLOAT == 1 static void ee_bufcpy(char *d, char *s, int count); void ee_bufcpy(char *pd, char *ps, int count) { char *pe=ps+count; while (ps!=pe) *pd++=*ps++; } static void parse_float(double value, char *buffer, char fmt, int precision) { int decpt, sign, exp, pos; char *fdigits = NULL; char cvtbuf[80]; int capexp = 0; int magnitude; if (fmt == 'G' || fmt == 'E') { capexp = 1; fmt += 'a' - 'A'; } if (fmt == 'g') { fdigits = ecvtbuf(value, precision, &decpt, &sign, cvtbuf); magnitude = decpt - 1; if (magnitude < -4 || magnitude > precision - 1) { fmt = 'e'; precision -= 1; } else { fmt = 'f'; precision -= decpt; } } if (fmt == 'e') { fdigits = ecvtbuf(value, precision + 1, &decpt, &sign, cvtbuf); if (sign) *buffer++ = '-'; *buffer++ = *fdigits; if (precision > 0) *buffer++ = '.'; ee_bufcpy(buffer, fdigits + 1, precision); buffer += precision; *buffer++ = capexp ? 'E' : 'e'; if (decpt == 0) { if (value == 0.0) exp = 0; else exp = -1; } else exp = decpt - 1; if (exp < 0) { *buffer++ = '-'; exp = -exp; } else *buffer++ = '+'; buffer[2] = (exp % 10) + '0'; exp = exp / 10; buffer[1] = (exp % 10) + '0'; exp = exp / 10; buffer[0] = (exp % 10) + '0'; buffer += 3; } else if (fmt == 'f') { fdigits = fcvtbuf(value, precision, &decpt, &sign, cvtbuf); if (sign) *buffer++ = '-'; if (*fdigits) { if (decpt <= 0) { *buffer++ = '0'; *buffer++ = '.'; for (pos = 0; pos < -decpt; pos++) *buffer++ = '0'; while (*fdigits) *buffer++ = *fdigits++; } else { pos = 0; while (*fdigits) { if (pos++ == decpt) *buffer++ = '.'; *buffer++ = *fdigits++; } } } else { *buffer++ = '0'; if (precision > 0) { *buffer++ = '.'; for (pos = 0; pos < precision; pos++) *buffer++ = '0'; } } } *buffer = '\0'; } static void decimal_point(char *buffer) { while (*buffer) { if (*buffer == '.') return; if (*buffer == 'e' || *buffer == 'E') break; buffer++; } if (*buffer) { int n = strnlen(buffer,256); while (n > 0) { buffer[n + 1] = buffer[n]; n--; } *buffer = '.'; } else { *buffer++ = '.'; *buffer = '\0'; } } static void cropzeros(char *buffer) { char *stop; while (*buffer && *buffer != '.') buffer++; if (*buffer++) { while (*buffer && *buffer != 'e' && *buffer != 'E') buffer++; stop = buffer--; while (*buffer == '0') buffer--; if (*buffer == '.') buffer--; while (buffer!=stop) *++buffer=0; } } static char *flt(char *str, double num, int size, int precision, char fmt, int flags) { char tmp[80]; char c, sign; int n, i; // Left align means no zero padding if (flags & LEFT) flags &= ~ZEROPAD; // Determine padding and sign char c = (flags & ZEROPAD) ? '0' : ' '; sign = 0; if (flags & SIGN) { if (num < 0.0) { sign = '-'; num = -num; size--; } else if (flags & PLUS) { sign = '+'; size--; } else if (flags & SPACE) { sign = ' '; size--; } } // Compute the precision value if (precision < 0) precision = 6; // Default precision: 6 // Convert floating point number to text parse_float(num, tmp, fmt, precision); if ((flags & HEX_PREP) && precision == 0) decimal_point(tmp); if (fmt == 'g' && !(flags & HEX_PREP)) cropzeros(tmp); n = strnlen(tmp,256); // Output number with alignment and padding size -= n; if (!(flags & (ZEROPAD | LEFT))) while (size-- > 0) *str++ = ' '; if (sign) *str++ = sign; if (!(flags & LEFT)) while (size-- > 0) *str++ = c; for (i = 0; i < n; i++) *str++ = tmp[i]; while (size-- > 0) *str++ = ' '; return str; } #endif static int ee_vsprintf(char *buf, const char *fmt, va_list args) { int len; unsigned long num; int i, base; char *str; char *s; int flags; // Flags to number() int field_width; // Width of output field int precision; // Min. # of digits for integers; max number of chars for from string int qualifier; // 'h', 'l', or 'L' for integer fields for (str = buf; *fmt; fmt++) { if (*fmt != '%') { *str++ = *fmt; continue; } // Process flags flags = 0; repeat: fmt++; // This also skips first '%' switch (*fmt) { case '-': flags |= LEFT; goto repeat; case '+': flags |= PLUS; goto repeat; case ' ': flags |= SPACE; goto repeat; case '#': flags |= HEX_PREP; goto repeat; case '0': flags |= ZEROPAD; goto repeat; } // Get field width field_width = -1; if (is_digit(*fmt)) field_width = ee_skip_atoi(&fmt); else if (*fmt == '*') { fmt++; field_width = va_arg(args, int); if (field_width < 0) { field_width = -field_width; flags |= LEFT; } } // Get the precision precision = -1; if (*fmt == '.') { ++fmt; if (is_digit(*fmt)) precision = ee_skip_atoi(&fmt); else if (*fmt == '*') { ++fmt; precision = va_arg(args, int); } if (precision < 0) precision = 0; } // Get the conversion qualifier qualifier = -1; if (*fmt == 'l' || *fmt == 'L') { qualifier = *fmt; fmt++; } // Default base base = 10; switch (*fmt) { case 'c': if (!(flags & LEFT)) while (--field_width > 0) *str++ = ' '; *str++ = (unsigned char) va_arg(args, int); while (--field_width > 0) *str++ = ' '; continue; case 's': s = va_arg(args, char *); if (!s) s = "<NULL>"; len = strnlen(s, precision); if (!(flags & LEFT)) while (len < field_width--) *str++ = ' '; for (i = 0; i < len; ++i) *str++ = *s++; while (len < field_width--) *str++ = ' '; continue; case 'p': if (field_width == -1) { field_width = 2 * sizeof(void *); flags |= ZEROPAD; } str = ee_number(str, (unsigned long) va_arg(args, void *), 16, field_width, precision, flags); continue; case 'A': flags |= UPPERCASE; case 'a': if (qualifier == 'l') str = eaddr(str, va_arg(args, unsigned char *), field_width, precision, flags); else str = iaddr(str, va_arg(args, unsigned char *), field_width, precision, flags); continue; // Integer number formats - set up the flags and "break" case 'o': base = 8; break; case 'X': flags |= UPPERCASE; case 'x': base = 16; break; case 'd': case 'i': flags |= SIGN; case 'u': break; #if defined(HAS_FLOAT) && HAS_FLOAT == 1 case 'f': str = flt(str, va_arg(args, double), field_width, precision, *fmt, flags | SIGN); continue; #endif default: if (*fmt != '%') *str++ = '%'; if (*fmt) *str++ = *fmt; else --fmt; continue; } if (qualifier == 'l') num = va_arg(args, unsigned long); else if (flags & SIGN) num = va_arg(args, int); else num = va_arg(args, unsigned int); str = ee_number(str, num, base, field_width, precision, flags); } *str = '\0'; return str - buf; } void uart_send_char(char c) { // this is Mbed OS putc to standard uart //MBED_PRINT_CHARACTER(c); if (c == '\n') neorv32_uart_putc('\r'); neorv32_uart_putc(c); } int ee_printf(const char *fmt, ...) { MBED_INITIALIZE_PRINT(); char buf[15*80],*p; va_list args; int n=0; va_start(args, fmt); ee_vsprintf(buf, fmt, args); va_end(args); p=buf; while (*p) { uart_send_char(*p); n++; p++; } return n; }
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