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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [ColdFire_MCF52259_CodeWarrior/] [printf-stdarg.c] - Rev 797
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/* Copyright 2001, 2002 Georges Menie (www.menie.org) stdarg version contributed by Christian Ettinger This program is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* putchar is the only external dependency for this file, if you have a working putchar, leave it commented out. If not, uncomment the define below and replace outbyte(c) by your own function call. */ #define putchar(c) c #include <stdarg.h> static void printchar(char **str, int c) { //extern int putchar(int c); if (str) { **str = (char)c; ++(*str); } else { (void)putchar(c); } } #define PAD_RIGHT 1 #define PAD_ZERO 2 static int prints(char **out, const char *string, int width, int pad) { register int pc = 0, padchar = ' '; if (width > 0) { register int len = 0; register const char *ptr; for (ptr = string; *ptr; ++ptr) ++len; if (len >= width) width = 0; else width -= len; if (pad & PAD_ZERO) padchar = '0'; } if (!(pad & PAD_RIGHT)) { for ( ; width > 0; --width) { printchar (out, padchar); ++pc; } } for ( ; *string ; ++string) { printchar (out, *string); ++pc; } for ( ; width > 0; --width) { printchar (out, padchar); ++pc; } return pc; } /* the following should be enough for 32 bit int */ #define PRINT_BUF_LEN 12 static int printi(char **out, int i, int b, int sg, int width, int pad, int letbase) { char print_buf[PRINT_BUF_LEN]; register char *s; register int t, neg = 0, pc = 0; register unsigned int u = (unsigned int)i; if (i == 0) { print_buf[0] = '0'; print_buf[1] = '\0'; return prints (out, print_buf, width, pad); } if (sg && b == 10 && i < 0) { neg = 1; u = (unsigned int)-i; } s = print_buf + PRINT_BUF_LEN-1; *s = '\0'; while (u) { t = (unsigned int)u % b; if( t >= 10 ) t += letbase - '0' - 10; *--s = (char)(t + '0'); u /= b; } if (neg) { if( width && (pad & PAD_ZERO) ) { printchar (out, '-'); ++pc; --width; } else { *--s = '-'; } } return pc + prints (out, s, width, pad); } static int print( char **out, const char *format, va_list args ) { register int width, pad; register int pc = 0; char scr[2]; for (; *format != 0; ++format) { if (*format == '%') { ++format; width = pad = 0; if (*format == '\0') break; if (*format == '%') goto out; if (*format == '-') { ++format; pad = PAD_RIGHT; } while (*format == '0') { ++format; pad |= PAD_ZERO; } for ( ; *format >= '0' && *format <= '9'; ++format) { width *= 10; width += *format - '0'; } if( *format == 's' ) { register char *s = (char *)va_arg( args, int ); pc += prints (out, s?s:"(null)", width, pad); continue; } if( *format == 'd' ) { pc += printi (out, va_arg( args, int ), 10, 1, width, pad, 'a'); continue; } if( *format == 'x' ) { pc += printi (out, va_arg( args, int ), 16, 0, width, pad, 'a'); continue; } if( *format == 'X' ) { pc += printi (out, va_arg( args, int ), 16, 0, width, pad, 'A'); continue; } if( *format == 'u' ) { pc += printi (out, va_arg( args, int ), 10, 0, width, pad, 'a'); continue; } if( *format == 'c' ) { /* char are converted to int then pushed on the stack */ scr[0] = (char)va_arg( args, int ); scr[1] = '\0'; pc += prints (out, scr, width, pad); continue; } } else { out: printchar (out, *format); ++pc; } } if (out) **out = '\0'; va_end( args ); return pc; } int printf(const char *format, ...) { va_list args; va_start( args, format ); return print( 0, format, args ); } int sprintf(char *out, const char *format, ...) { va_list args; va_start( args, format ); return print( &out, format, args ); } int snprintf( char *buf, unsigned int count, const char *format, ... ) { va_list args; ( void ) count; va_start( args, format ); return print( &buf, format, args ); } #ifdef TEST_PRINTF int main(void) { char *ptr = "Hello world!"; char *np = 0; int i = 5; unsigned int bs = sizeof(int)*8; int mi; char buf[80]; mi = (1 << (bs-1)) + 1; printf("%s\n", ptr); printf("printf test\n"); printf("%s is null pointer\n", np); printf("%d = 5\n", i); printf("%d = - max int\n", mi); printf("char %c = 'a'\n", 'a'); printf("hex %x = ff\n", 0xff); printf("hex %02x = 00\n", 0); printf("signed %d = unsigned %u = hex %x\n", -3, -3, -3); printf("%d %s(s)%", 0, "message"); printf("\n"); printf("%d %s(s) with %%\n", 0, "message"); sprintf(buf, "justif: \"%-10s\"\n", "left"); printf("%s", buf); sprintf(buf, "justif: \"%10s\"\n", "right"); printf("%s", buf); sprintf(buf, " 3: %04d zero padded\n", 3); printf("%s", buf); sprintf(buf, " 3: %-4d left justif.\n", 3); printf("%s", buf); sprintf(buf, " 3: %4d right justif.\n", 3); printf("%s", buf); sprintf(buf, "-3: %04d zero padded\n", -3); printf("%s", buf); sprintf(buf, "-3: %-4d left justif.\n", -3); printf("%s", buf); sprintf(buf, "-3: %4d right justif.\n", -3); printf("%s", buf); return 0; } /* * if you compile this file with * gcc -Wall $(YOUR_C_OPTIONS) -DTEST_PRINTF -c printf.c * you will get a normal warning: * printf.c:214: warning: spurious trailing `%' in format * this line is testing an invalid % at the end of the format string. * * this should display (on 32bit int machine) : * * Hello world! * printf test * (null) is null pointer * 5 = 5 * -2147483647 = - max int * char a = 'a' * hex ff = ff * hex 00 = 00 * signed -3 = unsigned 4294967293 = hex fffffffd * 0 message(s) * 0 message(s) with % * justif: "left " * justif: " right" * 3: 0003 zero padded * 3: 3 left justif. * 3: 3 right justif. * -3: -003 zero padded * -3: -3 left justif. * -3: -3 right justif. */ #endif /* To keep linker happy. */ int write( int i, char* c, int n) { (void)i; (void)n; (void)c; return 0; }
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