universe@599: /*
universe@599:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
universe@599:  *
universe@599:  * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
universe@599:  *
universe@599:  * Redistribution and use in source and binary forms, with or without
universe@599:  * modification, are permitted provided that the following conditions are met:
universe@599:  *
universe@599:  *   1. Redistributions of source code must retain the above copyright
universe@599:  *      notice, this list of conditions and the following disclaimer.
universe@599:  *
universe@599:  *   2. Redistributions in binary form must reproduce the above copyright
universe@599:  *      notice, this list of conditions and the following disclaimer in the
universe@599:  *      documentation and/or other materials provided with the distribution.
universe@599:  *
universe@599:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
universe@599:  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
universe@599:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
universe@599:  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
universe@599:  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
universe@599:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
universe@599:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
universe@599:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
universe@599:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
universe@599:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
universe@599:  * POSSIBILITY OF SUCH DAMAGE.
universe@599:  */
universe@599: 
universe@599: #include "cx/printf.h"
universe@599: 
universe@599: #include <stdio.h>
universe@599: #include <string.h>
universe@599: 
universe@634: #define CX_PRINTF_BUFSIZE 256
universe@599: 
universe@600: int cx_fprintf(void *stream, cx_write_func wfc, char const *fmt, ...) {
universe@599:     int ret;
universe@599:     va_list ap;
universe@599:     va_start(ap, fmt);
universe@599:     ret = cx_vfprintf(stream, wfc, fmt, ap);
universe@599:     va_end(ap);
universe@599:     return ret;
universe@599: }
universe@599: 
universe@600: int cx_vfprintf(void *stream, cx_write_func wfc, char const *fmt, va_list ap) {
universe@634:     char buf[CX_PRINTF_BUFSIZE];
universe@599:     va_list ap2;
universe@599:     va_copy(ap2, ap);
universe@634:     int ret = vsnprintf(buf, CX_PRINTF_BUFSIZE, fmt, ap);
universe@599:     if (ret < 0) {
universe@599:         return ret;
universe@634:     } else if (ret < CX_PRINTF_BUFSIZE) {
universe@599:         return (int) wfc(buf, 1, ret, stream);
universe@599:     } else {
universe@599:         int len = ret + 1;
universe@599:         char *newbuf = malloc(len);
universe@599:         if (!newbuf) {
universe@599:             return -1;
universe@599:         }
universe@599: 
universe@599:         ret = vsnprintf(newbuf, len, fmt, ap2);
universe@599:         if (ret > 0) {
universe@599:             ret = (int) wfc(newbuf, 1, ret, stream);
universe@599:         }
universe@599:         free(newbuf);
universe@599:     }
universe@599:     return ret;
universe@599: }
universe@599: 
universe@600: cxmutstr cx_asprintf_a(CxAllocator *allocator, char const *fmt, ...) {
universe@599:     va_list ap;
universe@599:     cxmutstr ret;
universe@599:     va_start(ap, fmt);
universe@599:     ret = cx_vasprintf_a(allocator, fmt, ap);
universe@599:     va_end(ap);
universe@599:     return ret;
universe@599: }
universe@599: 
universe@600: cxmutstr cx_vasprintf_a(CxAllocator *a, char const *fmt, va_list ap) {
universe@599:     cxmutstr s;
universe@599:     s.ptr = NULL;
universe@599:     s.length = 0;
universe@634:     char buf[CX_PRINTF_BUFSIZE];
universe@599:     va_list ap2;
universe@599:     va_copy(ap2, ap);
universe@634:     int ret = vsnprintf(buf, CX_PRINTF_BUFSIZE, fmt, ap);
universe@634:     if (ret > 0 && ret < CX_PRINTF_BUFSIZE) {
universe@599:         s.ptr = cxMalloc(a, ret + 1);
universe@599:         if (s.ptr) {
universe@599:             s.length = (size_t) ret;
universe@599:             memcpy(s.ptr, buf, ret);
universe@599:             s.ptr[s.length] = '\0';
universe@599:         }
universe@599:     } else {
universe@599:         int len = ret + 1;
universe@599:         s.ptr = cxMalloc(a, len);
universe@599:         if (s.ptr) {
universe@599:             ret = vsnprintf(s.ptr, len, fmt, ap2);
universe@599:             if (ret < 0) {
universe@599:                 free(s.ptr);
universe@599:                 s.ptr = NULL;
universe@599:             } else {
universe@599:                 s.length = (size_t) ret;
universe@599:             }
universe@599:         }
universe@599:     }
universe@599:     return s;
universe@599: }
universe@599: