ucx: src/printf.c@edb9f875b7f9 (annotated)

src/printf.c@edb9f875b7f9 (annotated)

src/printf.c

Fri, 12 Apr 2024 21:48:12 +0200

author: Mike Becker <universe@uap-core.de>
date: Fri, 12 Apr 2024 21:48:12 +0200
changeset 849: edb9f875b7f9
parent 813: aba6d37b78bd
permissions: -rw-r--r--

improves interface of cx_sprintf() variants

 /*
  * 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
 unsigned const cx_printf_sbo_size = CX_PRINTF_SBO_SIZE;
 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) {
         va_end(ap2);
         return ret;
     } else if (ret < CX_PRINTF_SBO_SIZE) {
         va_end(ap2);
         return (int) wfc(buf, 1, ret, stream);
     } else {
         int len = ret + 1;
         char *newbuf = malloc(len);
         if (!newbuf) {
             va_end(ap2);
             return -1;
         }
         ret = vsnprintf(newbuf, len, fmt, ap2);
         va_end(ap2);
         if (ret > 0) {
             ret = (int) wfc(newbuf, 1, ret, stream);
         }
         free(newbuf);
     }
     return ret;
 }
 cxmutstr cx_asprintf_a(
         CxAllocator const *allocator,
         char const *fmt,
         ...
 ) {
     va_list ap;
     va_start(ap, fmt);
     cxmutstr ret = cx_vasprintf_a(allocator, fmt, ap);
     va_end(ap);
     return ret;
 }
 cxmutstr cx_vasprintf_a(
         CxAllocator const *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;
             }
         }
     }
     va_end(ap2);
     return s;
 }
 int cx_sprintf_a(CxAllocator *alloc, char **str, size_t *len, const char *fmt, ... ) {
     va_list ap;
     va_start(ap, fmt);
     int ret = cx_vsprintf_a(alloc, str, len, fmt, ap);
     va_end(ap);
     return ret;
 }
 int cx_vsprintf_a(CxAllocator *alloc, char **str, size_t *len, const char *fmt, va_list ap) {
     va_list ap2;
     va_copy(ap2, ap);
     int ret = vsnprintf(*str, *len, fmt, ap);
     if ((unsigned) ret >= *len) {
         unsigned newlen = ret + 1;
         char *ptr = cxRealloc(alloc, *str, newlen);
         if (ptr) {
             int newret = vsnprintf(ptr, newlen, fmt, ap2);
             if (newret < 0) {
                 cxFree(alloc, ptr);
             } else {
                 *len = newlen;
                 *str = ptr;
                 ret = newret;
             }
         }
     }
     va_end(ap2);
     return ret;
 }
 int cx_sprintf_sa(CxAllocator *alloc, char *buf, size_t *len, char **str, const char *fmt, ... ) {
     va_list ap;
     va_start(ap, fmt);
     int ret = cx_vsprintf_sa(alloc, buf, len, str, fmt, ap);
     va_end(ap);
     return ret;
 }
 int cx_vsprintf_sa(CxAllocator *alloc, char *buf, size_t *len, char **str, const char *fmt, va_list ap) {
     va_list ap2;
     va_copy(ap2, ap);
     int ret = vsnprintf(buf, *len, fmt, ap);
     *str = buf;
     if ((unsigned) ret >= *len) {
         unsigned newlen = ret + 1;
         char *ptr = cxMalloc(alloc, newlen);
         if (ptr) {
             int newret = vsnprintf(ptr, newlen, fmt, ap2);
             if (newret < 0) {
                 cxFree(alloc, ptr);
             } else {
                 *len = newlen;
                 *str = ptr;
                 ret = newret;
             }
         }
     }
     va_end(ap2);
     return ret;
 }

Mercurial > hg > ucx / annotate

src/printf.c@edb9f875b7f9 (annotated)

src/printf.c