mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-26 22:31:05 +00:00
125 lines
2.4 KiB
C
125 lines
2.4 KiB
C
/*
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va.c
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varargs printf function
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif
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#include <stdarg.h>
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#include "QF/dstring.h"
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#include "QF/sys.h"
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#include "QF/va.h"
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struct va_ctx_s {
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dstring_t **strings;
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int num_strings;
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int str_index;
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};
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static va_ctx_t *default_va_ctx;
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VISIBLE va_ctx_t *
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va_create_context (int buffers)
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{
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va_ctx_t *ctx;
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ctx = malloc (sizeof (va_ctx_t) + buffers * sizeof (dstring_t *));
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ctx->strings = (dstring_t **) (ctx + 1);
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ctx->num_strings = buffers;
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ctx->str_index = 0;
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for (int i = 0; i < buffers; i++) {
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ctx->strings[i] = dstring_new ();
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}
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return ctx;
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}
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VISIBLE void
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va_destroy_context (va_ctx_t *ctx)
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{
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for (int i = 0; i < ctx->num_strings; i++) {
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dstring_delete (ctx->strings[i]);
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}
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free (ctx);
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}
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VISIBLE const char *
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va (va_ctx_t *ctx, const char *fmt, ...)
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{
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va_list args;
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dstring_t *dstr;
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if (!ctx) {
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if (!default_va_ctx) {
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default_va_ctx = va_create_context (4);
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}
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ctx = default_va_ctx;
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}
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dstr = ctx->strings[ctx->str_index++ % ctx->num_strings];
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va_start (args, fmt);
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dvsprintf (dstr, fmt, args);
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va_end (args);
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return dstr->str;
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}
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VISIBLE char *
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nva (const char *fmt, ...)
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{
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va_list args;
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dstring_t *string;
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string = dstring_new ();
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va_start (args, fmt);
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dvsprintf (string, fmt, args);
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va_end (args);
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return dstring_freeze (string);
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}
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static void
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va_shutdown (void *data)
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{
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if (default_va_ctx) {
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va_destroy_context (default_va_ctx);
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}
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}
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static void __attribute__((constructor))
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va_init (void)
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{
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Sys_RegisterShutdown (va_shutdown, 0);
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}
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