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Diffstat (limited to 'libc/stdio1/old_printf.c')
| -rw-r--r-- | libc/stdio1/old_printf.c | 230 |
1 files changed, 0 insertions, 230 deletions
diff --git a/libc/stdio1/old_printf.c b/libc/stdio1/old_printf.c deleted file mode 100644 index 81d62ac..0000000 --- a/libc/stdio1/old_printf.c +++ /dev/null @@ -1,230 +0,0 @@ -/* fprintf.c for limited Linux libc - Copyright (C) 1996 Joel N. Weber II <nemo@koa.iolani.honolulu.hi.us> - - This program is free software; you can redistribute it and/or - modify it under the terms of the GNU 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 General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ -/* Thanks Alan for writing the hard routine for me :-) - * Alan said that this works "most of the time". Something tells me I'm making - * it even worse! */ -/* The basic idea here is to make fprintf the core routine. printf obviously - can just call fprintf with stdout followed by all of its arguments. - sprintf() works using the fake file &the_sprintf. It's marked as fully - buffered, so that it will only write(2) when &the_sprintf->bufpos == - &the_sprintf->bufend, which I doubt will happen since &the_sprintf->bufend - = 0. The trick is that sprintf must set &the_sprintf->bufstart = - &the_sprintf->bufpos = its first argument. Not as orthagonal (is that - the right word?) as glibc's facilities for non-files, but this isn't a - library for people who have unlimited RAM budgets. (not like the libc - I use on linux/i586 enjoys an unlimited RAM budget either; I only have - 8 MB - - I'm not sure what the "correct" way to pass the variable arguments - from one function to the next is. Rather than pass the arguments - themselves, I'm passing a pointer to them. However, the following - explaination from Alan is probably a polite way of saying it will not - work on a 386 anyway. - Joel Weber - - [ I've migrated all of this code over to the ELKS stdarg that I wrote. - The accepted way to do it is for the wrapper function to accept a - variable number of arguments, use stdarg to make an argument pointer, - and then pass the argument pointer on to the core function, as I've - done here. This should definitely work on a 386, as the arguments - are still passed in the stack, and stack order is maintained. -Nat ] - */ - -/* - * This is NOT stunningly portable, but works - * for pretty dumb non ANSI compilers and is - * tight. Adjust the sizes to taste. - * - * Illegal format strings will break it. Only the - * following simple subset is supported - * - * %x - hex - * %d - decimal - * %s - string - * %c - char - * - * And the h/l length specifiers for %d/%x - * - * Alan Cox. - */ - -#include <stdarg.h> -#include "stdio.h" - -/* 17 to make sure that there's room for the trailing newline. - I'm not really sure if this is ideal... */ -static char nstring[17]="0123456789ABCDEF"; - -static unsigned char * -__numout(long i, int base) -{ - static unsigned char out[16]; - int n; - int flg = 0; - unsigned long val; - - if (i<0 && base==10) - { - flg = 1; - i = -i; - } - val = i; - - for (n = 0; n < 15; n++) - out[n] = ' '; - out[15] = '\0'; - n = 14; - do{ - out[n] = nstring[val % base]; - n--; - val /= base; - } - while(val); - if(flg) out[n--] = '-'; - return &out[n+1]; -} - -static int -internal_fprintf(FILE * stream, __const char * fmt, va_list ap) -{ - register int c; - int count = 0; - int type, base; - - while(c=*fmt++) - { - if(c!='%') - { - putc(c, stream); - count++; - } - else - { - type=1; - do { c=*fmt++; } while( c=='.' || (c>='0' && c<='9')); - if( c == 0 ) break; - if(c=='h') - { - c=*fmt++; - type = 0; - } - else if(c=='l') - { - c=*fmt++; - type = 2; - } - - switch(c) - { - case 'x': - case 'o': - case 'd': - if (c=='x') base=16; - if (c=='o') base=8; - if (c=='d') base=10; - { - long val=0; - switch(type) - { - case 0: - val=va_arg(ap, short); - break; - case 1: - val=va_arg(ap, int); - break; - case 2: - val=va_arg(ap, long); - break; - } - fputs((__const char *)__numout(val,base),stream); - } - break; - case 's': - { - char *cp; - cp=va_arg(ap, char *); - while(*cp) - putc(*cp++, stream); - break; - } - case 'c': - putc(va_arg(ap, int), stream); - break; - default: - putc(c, stream); - } - } - } - return count; -} - - -int -fprintf(FILE * stream, __const char * fmt, ...) -{ - va_list ap; - int retval; - va_start(ap, fmt); - retval=internal_fprintf(stream, fmt, ap); - va_end(ap); - return(retval); -} - -int -printf(__const char * fmt, ...) -{ - va_list ap; - int retval; - va_start(ap, fmt); - retval=internal_fprintf(stdout, fmt, ap); - va_end(ap); - return(retval); -} - -/* This is a strange way of doing sprintf, but it should work */ -int sprintf(char * s, __const char * fmt, ...) -{ - static FILE the_sprintf = { - -1, - 0, - 0, - 0, - 0, - _IOFBF, - _MODE_WRITE, - 0, 0, - 0, 0}; - va_list ap; - int retval; - - va_start(ap, fmt); - the_sprintf.bufstart = the_sprintf.bufpos = (unsigned char *) s; - the_sprintf.fc_err = 0; - - retval = internal_fprintf(&the_sprintf, fmt, ap); - /* null-terminate the string */ - putc('\0', &the_sprintf); - - va_end(ap); - return retval; -} - - - - - |