ucx: src/printf.c@5700ba9154ab (annotated)

src/printf.c@5700ba9154ab (annotated)

src/printf.c

Wed, 01 Feb 2023 18:06:50 +0100

author: Mike Becker <universe@uap-core.de>
date: Wed, 01 Feb 2023 18:06:50 +0100
changeset 643: 5700ba9154ab
parent 634: f78d3b77d456
child 644: fcaa0891ef28
permissions: -rw-r--r--

#228 make buffer sizes adjustable at compile time

 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
  *
  * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *   1. Redistributions of source code must retain the above copyright
  *      notice, this list of conditions and the following disclaimer.
  *
  *   2. Redistributions in binary form must reproduce the above copyright
  *      notice, this list of conditions and the following disclaimer in the
  *      documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 #include "cx/printf.h"
 #include <stdio.h>
 #include <string.h>
 #ifndef CX_PRINTF_SBO_SIZE
 #define CX_PRINTF_SBO_SIZE 512
 #endif
 int cx_fprintf(
         void *stream,
         cx_write_func wfc,
         char const *fmt,
         ...
 ) {
     int ret;
     va_list ap;
     va_start(ap, fmt);
     ret = cx_vfprintf(stream, wfc, fmt, ap);
     va_end(ap);
     return ret;
 }
 int cx_vfprintf(void *stream, cx_write_func wfc, char const *fmt, va_list ap) {
     char buf[CX_PRINTF_SBO_SIZE];
     va_list ap2;
     va_copy(ap2, ap);
     int ret = vsnprintf(buf, CX_PRINTF_SBO_SIZE, fmt, ap);
     if (ret < 0) {
         return ret;
     } else if (ret < CX_PRINTF_SBO_SIZE) {
         return (int) wfc(buf, 1, ret, stream);
     } else {
         int len = ret + 1;
         char *newbuf = malloc(len);
         if (!newbuf) {
             return -1;
         }
         ret = vsnprintf(newbuf, len, fmt, ap2);
         if (ret > 0) {
             ret = (int) wfc(newbuf, 1, ret, stream);
         }
         free(newbuf);
     }
     return ret;
 }
 cxmutstr cx_asprintf_a(CxAllocator *allocator, char const *fmt, ...) {
     va_list ap;
     cxmutstr ret;
     va_start(ap, fmt);
     ret = cx_vasprintf_a(allocator, fmt, ap);
     va_end(ap);
     return ret;
 }
 cxmutstr cx_vasprintf_a(CxAllocator *a, char const *fmt, va_list ap) {
     cxmutstr s;
     s.ptr = NULL;
     s.length = 0;
     char buf[CX_PRINTF_SBO_SIZE];
     va_list ap2;
     va_copy(ap2, ap);
     int ret = vsnprintf(buf, CX_PRINTF_SBO_SIZE, fmt, ap);
     if (ret > 0 && ret < CX_PRINTF_SBO_SIZE) {
         s.ptr = cxMalloc(a, ret + 1);
         if (s.ptr) {
             s.length = (size_t) ret;
             memcpy(s.ptr, buf, ret);
             s.ptr[s.length] = '\0';
         }
     } else {
         int len = ret + 1;
         s.ptr = cxMalloc(a, len);
         if (s.ptr) {
             ret = vsnprintf(s.ptr, len, fmt, ap2);
             if (ret < 0) {
                 free(s.ptr);
                 s.ptr = NULL;
             } else {
                 s.length = (size_t) ret;
             }
         }
     }
     return s;
 }

Mercurial > hg > ucx / annotate

src/printf.c@5700ba9154ab (annotated)

src/printf.c