277 lines
6.1 KiB
C
277 lines
6.1 KiB
C
/******************************************************************************
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Copyright (c) 1992, 1995, 1996 Xerox Corporation. All rights reserved.
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Portions of this code were written by Stephen White, aka ghond.
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Use and copying of this software and preparation of derivative works based
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upon this software are permitted. Any distribution of this software or
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derivative works must comply with all applicable United States export
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control laws. This software is made available AS IS, and Xerox Corporation
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makes no warranty about the software, its performance or its conformity to
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any specification. Any person obtaining a copy of this software is requested
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to send their name and post office or electronic mail address to:
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Pavel Curtis
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Xerox PARC
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3333 Coyote Hill Rd.
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Palo Alto, CA 94304
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Pavel@Xerox.Com
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*****************************************************************************/
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#include <float.h>
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#include <stdarg.h>
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#include <string.h>
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#include <stdio.h>
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#include "pconfig.h"
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#include "storage.h"
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#include "streams.h"
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Stream *
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new_stream(int size)
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{
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Stream *s = mymalloc(sizeof(Stream), M_STREAM);
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s->buffer = mymalloc(size, M_STREAM);
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s->buflen = size;
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s->current = 0;
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return s;
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}
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static void
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grow(Stream * s, int newlen)
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{
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char *newbuf;
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newbuf = mymalloc(newlen, M_STREAM);
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memcpy(newbuf, s->buffer, s->current);
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myfree(s->buffer, M_STREAM);
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s->buffer = newbuf;
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s->buflen = newlen;
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}
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void
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stream_add_char(Stream * s, char c)
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{
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if (s->current + 1 >= s->buflen)
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grow(s, s->buflen * 2);
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s->buffer[s->current++] = c;
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}
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void
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stream_add_string(Stream * s, const char *string)
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{
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int len = strlen(string);
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if (s->current + len >= s->buflen) {
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int newlen = s->buflen * 2;
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if (newlen <= s->current + len)
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newlen = s->current + len + 1;
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grow(s, newlen);
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}
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strcpy(s->buffer + s->current, string);
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s->current += len;
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}
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static const char *
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itoa(int n, int radix)
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{
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if (n == 0) /* zero produces "" below. */
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return "0";
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else if (n == -2147483647 - 1) /* min. integer won't work below. */
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switch (radix) {
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case 16:
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return "-7FFFFFFF";
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case 10:
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return "-2147483648";
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case 8:
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return "-17777777777";
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default:
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return "0";
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} else {
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static char buffer[20];
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char *ptr = buffer + 19;
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int neg = 0;
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if (n < 0) {
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neg = 1;
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n = -n;
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}
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*(ptr) = '\0';
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while (n != 0) {
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int digit = n % radix;
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*(--ptr) = (digit < 10 ? '0' + digit : 'A' + digit - 10);
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n /= radix;
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}
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if (neg)
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*(--ptr) = '-';
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return ptr;
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}
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}
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static const char *
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dbl_fmt(void)
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{
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static const char *fmt = 0;
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static char buffer[10];
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if (!fmt) {
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sprintf(buffer, "%%.%dg", DBL_DIG);
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fmt = buffer;
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}
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return fmt;
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}
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void
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stream_printf(Stream * s, const char *fmt,...)
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{
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char buffer[40];
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va_list args;
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va_start(args, fmt);
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while (*fmt) {
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char c = *fmt;
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if (c == '%') {
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char pad = ' ';
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int width = 0, base;
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const char *string = ""; /* initialized to silence warning */
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while ((c = *(++fmt)) != '\0') {
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switch (c) {
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case 's':
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string = va_arg(args, char *);
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break;
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case 'x':
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base = 16;
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goto finish_number;
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case 'o':
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base = 8;
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goto finish_number;
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case 'd':
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base = 10;
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finish_number:
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string = itoa(va_arg(args, int), base);
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break;
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case 'g':
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sprintf(buffer, dbl_fmt(), va_arg(args, double));
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if (!strchr(buffer, '.') && !strchr(buffer, 'e'))
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strcat(buffer, ".0"); /* make it look floating */
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string = buffer;
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break;
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case '0':
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if (width == 0) {
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pad = '0';
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continue;
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}
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case '1':
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case '2':
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case '3':
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case '4':
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case '5':
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case '6':
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case '7':
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case '8':
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case '9':
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width = width * 10 + c - '0';
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continue;
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default:
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goto abort;
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}
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break;
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}
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if (width && (width -= strlen(string)) > 0)
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while (width--)
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stream_add_char(s, pad);
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stream_add_string(s, string);
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} else
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stream_add_char(s, *fmt);
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fmt++;
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}
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abort:
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va_end(args);
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}
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void
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free_stream(Stream * s)
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{
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myfree(s->buffer, M_STREAM);
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myfree(s, M_STREAM);
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}
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char *
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reset_stream(Stream * s)
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{
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s->buffer[s->current] = '\0';
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s->current = 0;
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return s->buffer;
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}
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char *
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stream_contents(Stream * s)
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{
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s->buffer[s->current] = '\0';
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return s->buffer;
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}
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int
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stream_length(Stream * s)
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{
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return s->current;
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}
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char rcsid_streams[] = "$Id: streams.c,v 1.1.1.1 2004/02/26 13:14:00 jesse Exp $";
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/*
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* $Log: streams.c,v $
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* Revision 1.1.1.1 2004/02/26 13:14:00 jesse
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* Initial import into CVS
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*
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* Revision 1.3 1998/12/14 13:19:01 nop
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* Merge UNSAFE_OPTS (ref fixups); fix Log tag placement to fit CVS whims
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*
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* Revision 1.2 1997/03/03 04:19:28 nop
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* GNU Indent normalization
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*
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* Revision 1.1.1.1 1997/03/03 03:45:01 nop
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* LambdaMOO 1.8.0p5
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*
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* Revision 2.5 1996/03/19 07:14:02 pavel
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* Fixed default printing of floating-point numbers. Release 1.8.0p2.
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*
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* Revision 2.4 1996/03/11 23:33:04 pavel
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* Added support for hexadecimal to stream_printf(). Release 1.8.0p1.
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*
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* Revision 2.3 1996/03/10 01:04:38 pavel
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* Increased the precision of printed floating-point numbers by two digits.
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* Release 1.8.0.
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*
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* Revision 2.2 1996/02/08 06:50:39 pavel
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* Added support for %g conversion in stream_printf(). Renamed err/logf() to
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* errlog/oklog(). Updated copyright notice for 1996. Release 1.8.0beta1.
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*
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* Revision 2.1 1996/01/11 07:43:01 pavel
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* Added support for `%o' to stream_printf(). Release 1.8.0alpha5.
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*
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* Revision 2.0 1995/11/30 04:31:43 pavel
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* New baseline version, corresponding to release 1.8.0alpha1.
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*
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* Revision 1.5 1992/10/23 23:03:47 pavel
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* Added copyright notice.
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*
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* Revision 1.4 1992/10/21 03:02:35 pavel
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* Converted to use new automatic configuration system.
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*
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* Revision 1.3 1992/08/10 16:52:24 pjames
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* Updated #includes.
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*
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* Revision 1.2 1992/07/21 00:06:51 pavel
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* Added rcsid_<filename-root> declaration to hold the RCS ident. string.
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*
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* Revision 1.1 1992/07/20 23:23:12 pavel
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* Initial RCS-controlled version.
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*/
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