| 1,5 → 1,6 |
|---|
| /* |
| * Copyright (C) 2001-2004 Jakub Jermar |
| * Copyright (C) 2006 Josef Cejka |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| 34,55 → 35,168 |
|---|
| |
| #include <arch.h> |
| |
| static char digits[] = "0123456789abcdef"; /**< Hexadecimal characters */ |
| SPINLOCK_INITIALIZE(printflock); /**< printf spinlock */ |
| |
| #define __PRINTF_FLAG_PREFIX 0x00000001 /* show prefixes 0x or 0*/ |
| #define __PRINTF_FLAG_SIGNED 0x00000002 /* signed / unsigned number */ |
| #define __PRINTF_FLAG_ZEROPADDED 0x00000004 /* print leading zeroes */ |
| #define __PRINTF_FLAG_LEFTALIGNED 0x00000010 /* align to left */ |
| #define __PRINTF_FLAG_SHOWPLUS 0x00000020 /* always show + sign */ |
| #define __PRINTF_FLAG_SPACESIGN 0x00000040 /* print space instead of plus */ |
| #define __PRINTF_FLAG_BIGCHARS 0x00000080 /* show big characters */ |
| #define __PRINTF_FLAG_NEGATIVE 0x00000100 /* number has - sign */ |
| |
| /** Print NULL terminated string |
| * |
| * Print characters from str using putchar() until |
| * \\0 character is reached. |
| * |
| * @param str Characters to print. |
| * |
| */ |
| static void print_str(const char *str) |
| #define PRINT_NUMBER_BUFFER_SIZE (64+5) /* Buffer big enought for 64 bit number |
| * printed in base 2, sign, prefix and |
| * 0 to terminate string.. (last one is only for better testing |
| * end of buffer by zero-filling subroutine) |
| */ |
| typedef enum { |
| PrintfQualifierByte = 0, |
| PrintfQualifierShort, |
| PrintfQualifierInt, |
| PrintfQualifierLong, |
| PrintfQualifierLongLong, |
| PrintfQualifierNative, |
| PrintfQualifierPointer |
| } qualifier_t; |
| |
| static char digits_small[] = "0123456789abcdef"; /* Small hexadecimal characters */ |
| static char digits_big[] = "0123456789ABCDEF"; /* Big hexadecimal characters */ |
| |
| static inline int isdigit(int c) |
| { |
| int i = 0; |
| char c; |
| char errstr[] = "(NULL)"; |
| return ((c >= '0' )&&( c <= '9')); |
| } |
| |
| static __native strlen(const char *str) |
| { |
| __native counter = 0; |
| |
| while (str[counter] != 0) { |
| counter++; |
| } |
| |
| return counter; |
| } |
| |
| /** Print one string without adding \n at end |
| * Dont use this function directly - printflock is not locked here |
| * */ |
| static int putstr(const char *str) |
| { |
| int count; |
| if (str == NULL) { |
| while ((c = errstr[i++])) |
| putchar(c); |
| return; |
| } |
| str = "(NULL)"; |
| } |
| |
| while ((c = str[i++])) |
| putchar(c); |
| for (count = 0; str[count] != 0; count++) { |
| putchar(str[count]); |
| } |
| return count; |
| } |
| |
| |
| /** Print hexadecimal digits |
| /** Print count characters from buffer to output |
| * |
| * Print fixed count of hexadecimal digits from |
| * the number num. The digits are printed in |
| * natural left-to-right order starting with |
| * the width-th digit. |
| * |
| * @param num Number containing digits. |
| * @param width Count of digits to print. |
| * |
| */ |
| static void print_fixed_hex(const __u64 num, const int width) |
| static int putnchars(const char *buffer, __native count) |
| { |
| int i; |
| |
| for (i = width*8 - 4; i >= 0; i -= 4) |
| putchar(digits[(num>>i) & 0xf]); |
| if (buffer == NULL) { |
| buffer = "(NULL)"; |
| count = 6; |
| } |
| |
| for (i = 0; i < count; i++) { |
| putchar(buffer[i]); |
| } |
| |
| return count; |
| } |
| |
| /** Print one formatted character |
| * @param c character to print |
| * @param width |
| * @param flags |
| * @return number of printed characters or EOF |
| */ |
| static int print_char(char c, int width, __u64 flags) |
| { |
| int counter = 0; |
| |
| if (!(flags & __PRINTF_FLAG_LEFTALIGNED)) { |
| while (--width > 0) { /* one space is consumed by character itself hence predecrement */ |
| /* FIXME: painful slow */ |
| putchar(' '); |
| ++counter; |
| } |
| } |
| |
| putchar(c); |
| ++counter; |
| |
| while (--width > 0) { /* one space is consumed by character itself hence predecrement */ |
| putchar(' '); |
| ++counter; |
| } |
| |
| return counter; |
| } |
| |
| /** Print one string |
| * @param s string |
| * @param width |
| * @param precision |
| * @param flags |
| * @return number of printed characters or EOF |
| */ |
| |
| static int print_string(char *s, int width, int precision, __u64 flags) |
| { |
| int counter = 0; |
| __native size; |
| |
| if (s == NULL) { |
| return putstr("(NULL)"); |
| } |
| |
| size = strlen(s); |
| |
| /* print leading spaces */ |
| |
| if (precision == 0) |
| precision = size; |
| |
| width -= precision; |
| |
| if (!(flags & __PRINTF_FLAG_LEFTALIGNED)) { |
| while (width-- > 0) { |
| putchar(' '); |
| counter++; |
| } |
| } |
| |
| while (precision > size) { |
| precision--; |
| putchar(' '); |
| ++counter; |
| } |
| |
| if (putnchars(s, precision) == EOF) { |
| return EOF; |
| } |
| |
| counter += precision; |
| |
| while (width-- > 0) { |
| putchar(' '); |
| ++counter; |
| } |
| |
| return ++counter; |
| } |
| |
| |
| /** Print number in given base |
| * |
| * Print significant digits of a number in given |
| 89,22 → 203,146 |
|---|
| * base. |
| * |
| * @param num Number to print. |
| * @param width |
| * @param precision |
| * @param base Base to print the number in (should |
| * be in range 2 .. 16). |
| * @param flags output modifiers |
| * @return number of written characters or EOF |
| * |
| */ |
| static void print_number(const __native num, const unsigned int base) |
| static int print_number(__u64 num, int width, int precision, int base , __u64 flags) |
| { |
| int val = num; |
| char d[sizeof(__native)*8+1]; /* this is good enough even for base == 2 */ |
| int i = sizeof(__native)*8-1; |
| char *digits = digits_small; |
| char d[PRINT_NUMBER_BUFFER_SIZE]; /* this is good enough even for base == 2, prefix and sign */ |
| char *ptr = &d[PRINT_NUMBER_BUFFER_SIZE - 1]; |
| int size = 0; |
| int written = 0; |
| char sgn; |
| |
| do { |
| d[i--] = digits[val % base]; |
| } while (val /= base); |
| if (flags & __PRINTF_FLAG_BIGCHARS) |
| digits = digits_big; |
| |
| d[sizeof(__native)*8] = 0; |
| print_str(&d[i + 1]); |
| *ptr-- = 0; /* Put zero at end of string */ |
| |
| if (num == 0) { |
| *ptr-- = '0'; |
| size++; |
| } else { |
| do { |
| *ptr-- = digits[num % base]; |
| size++; |
| } while (num /= base); |
| } |
| |
| /* Collect sum of all prefixes/signs/... to calculate padding and leading zeroes */ |
| if (flags & __PRINTF_FLAG_PREFIX) { |
| switch(base) { |
| case 2: /* Binary formating is not standard, but usefull */ |
| size += 2; |
| break; |
| case 8: |
| size++; |
| break; |
| case 16: |
| size += 2; |
| break; |
| } |
| } |
| |
| sgn = 0; |
| if (flags & __PRINTF_FLAG_SIGNED) { |
| if (flags & __PRINTF_FLAG_NEGATIVE) { |
| sgn = '-'; |
| size++; |
| } else if (flags & __PRINTF_FLAG_SHOWPLUS) { |
| sgn = '+'; |
| size++; |
| } else if (flags & __PRINTF_FLAG_SPACESIGN) { |
| sgn = ' '; |
| size++; |
| } |
| } |
| |
| if (flags & __PRINTF_FLAG_LEFTALIGNED) { |
| flags &= ~__PRINTF_FLAG_ZEROPADDED; |
| } |
| |
| /* if number is leftaligned or precision is specified then zeropadding is ignored */ |
| if (flags & __PRINTF_FLAG_ZEROPADDED) { |
| if ((precision == 0) && (width > size)) { |
| precision = width - size; |
| } |
| } |
| |
| /* print leading spaces */ |
| if (size > precision) /* We must print whole number not only a part */ |
| precision = size; |
| |
| width -= precision; |
| |
| if (!(flags & __PRINTF_FLAG_LEFTALIGNED)) { |
| while (width-- > 0) { |
| putchar(' '); |
| written++; |
| } |
| } |
| |
| /* print sign */ |
| if (sgn) { |
| putchar(sgn); |
| written++; |
| } |
| |
| /* print prefix */ |
| |
| if (flags & __PRINTF_FLAG_PREFIX) { |
| switch(base) { |
| case 2: /* Binary formating is not standard, but usefull */ |
| putchar('0'); |
| if (flags & __PRINTF_FLAG_BIGCHARS) { |
| putchar('B'); |
| } else { |
| putchar('b'); |
| } |
| written += 2; |
| break; |
| case 8: |
| putchar('o'); |
| written++; |
| break; |
| case 16: |
| putchar('0'); |
| if (flags & __PRINTF_FLAG_BIGCHARS) { |
| putchar('X'); |
| } else { |
| putchar('x'); |
| } |
| written += 2; |
| break; |
| } |
| } |
| |
| /* print leading zeroes */ |
| precision -= size; |
| while (precision-- > 0) { |
| putchar('0'); |
| written++; |
| } |
| |
| |
| /* print number itself */ |
| |
| written += putstr(++ptr); |
| |
| /* print ending spaces */ |
| |
| while (width-- > 0) { |
| putchar(' '); |
| written++; |
| } |
| |
| return written; |
| } |
| |
| |
| 164,103 → 402,269 |
|---|
| * |
| * @param fmt Formatting NULL terminated string. |
| */ |
| void printf(const char *fmt, ...) |
| int printf(const char *fmt, ...) |
| { |
| int irqpri, i = 0; |
| int irqpri; |
| int i = 0, j = 0; /* i is index of currently processed char from fmt, j is index to the first not printed nonformating character */ |
| int end; |
| int counter; /* counter of printed characters */ |
| int retval; /* used to store return values from called functions */ |
| va_list ap; |
| char c; |
| char c; |
| qualifier_t qualifier; /* type of argument */ |
| int base; /* base in which will be parameter (numbers only) printed */ |
| __u64 number; /* argument value */ |
| __native size; /* byte size of integer parameter */ |
| int width, precision; |
| __u64 flags; |
| |
| counter = 0; |
| |
| va_start(ap, fmt); |
| |
| |
| irqpri = interrupts_disable(); |
| spinlock_lock(&printflock); |
| |
| while ((c = fmt[i++])) { |
| switch (c) { |
| |
| while ((c = fmt[i])) { |
| /* control character */ |
| if (c == '%' ) { |
| /* print common characters if any processed */ |
| if (i > j) { |
| if ((retval = putnchars(&fmt[j], (__native)(i - j))) == EOF) { /* error */ |
| counter = -counter; |
| goto out; |
| } |
| counter += retval; |
| } |
| |
| j = i; |
| /* parse modifiers */ |
| flags = 0; |
| end = 0; |
| |
| do { |
| ++i; |
| switch (c = fmt[i]) { |
| case '#': flags |= __PRINTF_FLAG_PREFIX; break; |
| case '-': flags |= __PRINTF_FLAG_LEFTALIGNED; break; |
| case '+': flags |= __PRINTF_FLAG_SHOWPLUS; break; |
| case ' ': flags |= __PRINTF_FLAG_SPACESIGN; break; |
| case '0': flags |= __PRINTF_FLAG_ZEROPADDED; break; |
| default: end = 1; |
| }; |
| |
| } while (end == 0); |
| |
| /* width & '*' operator */ |
| width = 0; |
| if (isdigit(fmt[i])) { |
| while (isdigit(fmt[i])) { |
| width *= 10; |
| width += fmt[i++] - '0'; |
| } |
| } else if (fmt[i] == '*') { |
| /* get width value from argument list*/ |
| i++; |
| width = (int)va_arg(ap, int); |
| if (width < 0) { |
| /* negative width means to set '-' flag */ |
| width *= -1; |
| flags |= __PRINTF_FLAG_LEFTALIGNED; |
| } |
| } |
| |
| /* precision and '*' operator */ |
| precision = 0; |
| if (fmt[i] == '.') { |
| ++i; |
| if (isdigit(fmt[i])) { |
| while (isdigit(fmt[i])) { |
| precision *= 10; |
| precision += fmt[i++] - '0'; |
| } |
| } else if (fmt[i] == '*') { |
| /* get precision value from argument list*/ |
| i++; |
| precision = (int)va_arg(ap, int); |
| if (precision < 0) { |
| /* negative precision means to ignore it */ |
| precision = 0; |
| } |
| } |
| } |
| |
| /* control character */ |
| case '%': |
| |
| switch (c = fmt[i++]) { |
| switch (fmt[i++]) { |
| /** TODO: unimplemented qualifiers: |
| * t ptrdiff_t - ISO C 99 |
| */ |
| case 'h': /* char or short */ |
| qualifier = PrintfQualifierShort; |
| if (fmt[i] == 'h') { |
| i++; |
| qualifier = PrintfQualifierByte; |
| } |
| break; |
| case 'l': /* long or long long*/ |
| qualifier = PrintfQualifierLong; |
| if (fmt[i] == 'l') { |
| i++; |
| qualifier = PrintfQualifierLongLong; |
| } |
| break; |
| case 'z': /* __native */ |
| qualifier = PrintfQualifierNative; |
| break; |
| default: |
| qualifier = PrintfQualifierInt; /* default type */ |
| --i; |
| } |
| |
| base = 10; |
| |
| /* percentile itself */ |
| case '%': |
| break; |
| switch (c = fmt[i]) { |
| |
| /* |
| * String and character conversions. |
| */ |
| case 's': |
| print_str(va_arg(ap, char_ptr)); |
| goto loop; |
| /* |
| * String and character conversions. |
| */ |
| case 's': |
| if ((retval = print_string(va_arg(ap, char*), width, precision, flags)) == EOF) { |
| counter = -counter; |
| goto out; |
| }; |
| |
| counter += retval; |
| j = i + 1; |
| goto next_char; |
| case 'c': |
| c = va_arg(ap, unsigned int); |
| if ((retval = print_char(c, width, flags )) == EOF) { |
| counter = -counter; |
| goto out; |
| }; |
| |
| counter += retval; |
| j = i + 1; |
| goto next_char; |
| |
| case 'c': |
| c = (char) va_arg(ap, int); |
| break; |
| /* |
| * Integer values |
| */ |
| case 'P': /* pointer */ |
| flags |= __PRINTF_FLAG_BIGCHARS; |
| case 'p': |
| flags |= __PRINTF_FLAG_PREFIX; |
| base = 16; |
| qualifier = PrintfQualifierPointer; |
| break; |
| case 'b': |
| base = 2; |
| break; |
| case 'o': |
| base = 8; |
| break; |
| case 'd': |
| case 'i': |
| flags |= __PRINTF_FLAG_SIGNED; |
| case 'u': |
| break; |
| case 'X': |
| flags |= __PRINTF_FLAG_BIGCHARS; |
| case 'x': |
| base = 16; |
| break; |
| /* percentile itself */ |
| case '%': |
| j = i; |
| goto next_char; |
| /* |
| * Bad formatting. |
| */ |
| default: |
| /* Unknown format |
| * now, the j is index of '%' so we will |
| * print whole bad format sequence |
| */ |
| goto next_char; |
| } |
| |
| |
| /* Print integers */ |
| /* print number */ |
| switch (qualifier) { |
| case PrintfQualifierByte: |
| size = sizeof(unsigned char); |
| number = (__u64)va_arg(ap, unsigned int); |
| break; |
| case PrintfQualifierShort: |
| size = sizeof(unsigned short); |
| number = (__u64)va_arg(ap, unsigned int); |
| break; |
| case PrintfQualifierInt: |
| size = sizeof(unsigned int); |
| number = (__u64)va_arg(ap, unsigned int); |
| break; |
| case PrintfQualifierLong: |
| size = sizeof(unsigned long); |
| number = (__u64)va_arg(ap, unsigned long); |
| break; |
| case PrintfQualifierLongLong: |
| size = sizeof(unsigned long long); |
| number = (__u64)va_arg(ap, unsigned long long); |
| break; |
| case PrintfQualifierPointer: |
| size = sizeof(void *); |
| number = (__u64)(unsigned long)va_arg(ap, void *); |
| break; |
| case PrintfQualifierNative: |
| size = sizeof(__native); |
| number = (__u64)va_arg(ap, __native); |
| break; |
| default: /* Unknown qualifier */ |
| counter = -counter; |
| goto out; |
| |
| } |
| |
| if (flags & __PRINTF_FLAG_SIGNED) { |
| if (number & (0x1 << (size*8 - 1))) { |
| flags |= __PRINTF_FLAG_NEGATIVE; |
| |
| if (size == sizeof(__u64)) { |
| number = -((__s64)number); |
| } else { |
| number = ~number; |
| number &= (~((0xFFFFFFFFFFFFFFFFll) << (size * 8))); |
| number++; |
| } |
| } |
| } |
| |
| /* |
| * Hexadecimal conversions with fixed width. |
| */ |
| case 'P': |
| print_str("0x"); |
| case 'p': |
| print_fixed_hex(va_arg(ap, __native), sizeof(__native)); |
| goto loop; |
| if ((retval = print_number(number, width, precision, base, flags)) == EOF ) { |
| counter = -counter; |
| goto out; |
| }; |
| |
| case 'Q': |
| print_str("0x"); |
| case 'q': |
| print_fixed_hex(va_arg(ap, __u64), INT64); |
| goto loop; |
| |
| case 'L': |
| print_str("0x"); |
| case 'l': |
| print_fixed_hex(va_arg(ap, __native), INT32); |
| goto loop; |
| |
| case 'W': |
| print_str("0x"); |
| case 'w': |
| print_fixed_hex(va_arg(ap, __native), INT16); |
| goto loop; |
| |
| case 'B': |
| print_str("0x"); |
| case 'b': |
| print_fixed_hex(va_arg(ap, __native), INT8); |
| goto loop; |
| counter += retval; |
| j = i + 1; |
| } |
| next_char: |
| |
| ++i; |
| } |
| |
| /* |
| * Decimal and hexadecimal conversions. |
| */ |
| case 'd': |
| print_number(va_arg(ap, __native), 10); |
| goto loop; |
| |
| case 'X': |
| print_str("0x"); |
| case 'x': |
| print_number(va_arg(ap, __native), 16); |
| goto loop; |
| |
| /* |
| * Bad formatting. |
| */ |
| default: |
| goto out; |
| } |
| |
| default: putchar(c); |
| if (i > j) { |
| if ((retval = putnchars(&fmt[j], (__native)(i - j))) == EOF) { /* error */ |
| counter = -counter; |
| goto out; |
| } |
| |
| loop: |
| ; |
| counter += retval; |
| } |
| |
| out: |
| spinlock_unlock(&printflock); |
| interrupts_restore(irqpri); |
| |
| va_end(ap); |
| return counter; |
| } |
| |