comparison: src/printf.c
src/printf.c
- changeset 599
- 6536a9a75b71
- child 600
- 19211b88cc0f
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| 598:70b7456b5b12 | 599:6536a9a75b71 |
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| 1 /* | |
| 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. | |
| 3 * | |
| 4 * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved. | |
| 5 * | |
| 6 * Redistribution and use in source and binary forms, with or without | |
| 7 * modification, are permitted provided that the following conditions are met: | |
| 8 * | |
| 9 * 1. Redistributions of source code must retain the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer. | |
| 11 * | |
| 12 * 2. Redistributions in binary form must reproduce the above copyright | |
| 13 * notice, this list of conditions and the following disclaimer in the | |
| 14 * documentation and/or other materials provided with the distribution. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | |
| 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| 26 * POSSIBILITY OF SUCH DAMAGE. | |
| 27 */ | |
| 28 | |
| 29 #include "cx/printf.h" | |
| 30 | |
| 31 #include <stdio.h> | |
| 32 #include <string.h> | |
| 33 | |
| 34 #define UCX_PRINTF_BUFSIZE 256 | |
| 35 | |
| 36 int cx_fprintf(void *stream, cx_write_func wfc, const char *fmt, ...) { | |
| 37 int ret; | |
| 38 va_list ap; | |
| 39 va_start(ap, fmt); | |
| 40 ret = cx_vfprintf(stream, wfc, fmt, ap); | |
| 41 va_end(ap); | |
| 42 return ret; | |
| 43 } | |
| 44 | |
| 45 int cx_vfprintf(void *stream, cx_write_func wfc, const char *fmt, va_list ap) { | |
| 46 char buf[UCX_PRINTF_BUFSIZE]; | |
| 47 va_list ap2; | |
| 48 va_copy(ap2, ap); | |
| 49 int ret = vsnprintf(buf, UCX_PRINTF_BUFSIZE, fmt, ap); | |
| 50 if (ret < 0) { | |
| 51 return ret; | |
| 52 } else if (ret < UCX_PRINTF_BUFSIZE) { | |
| 53 return (int) wfc(buf, 1, ret, stream); | |
| 54 } else { | |
| 55 int len = ret + 1; | |
| 56 char *newbuf = malloc(len); | |
| 57 if (!newbuf) { | |
| 58 return -1; | |
| 59 } | |
| 60 | |
| 61 ret = vsnprintf(newbuf, len, fmt, ap2); | |
| 62 if (ret > 0) { | |
| 63 ret = (int) wfc(newbuf, 1, ret, stream); | |
| 64 } | |
| 65 free(newbuf); | |
| 66 } | |
| 67 return ret; | |
| 68 } | |
| 69 | |
| 70 cxmutstr cx_asprintf_a(CxAllocator *allocator, const char *fmt, ...) { | |
| 71 va_list ap; | |
| 72 cxmutstr ret; | |
| 73 va_start(ap, fmt); | |
| 74 ret = cx_vasprintf_a(allocator, fmt, ap); | |
| 75 va_end(ap); | |
| 76 return ret; | |
| 77 } | |
| 78 | |
| 79 cxmutstr cx_vasprintf_a(CxAllocator *a, const char *fmt, va_list ap) { | |
| 80 cxmutstr s; | |
| 81 s.ptr = NULL; | |
| 82 s.length = 0; | |
| 83 char buf[UCX_PRINTF_BUFSIZE]; | |
| 84 va_list ap2; | |
| 85 va_copy(ap2, ap); | |
| 86 int ret = vsnprintf(buf, UCX_PRINTF_BUFSIZE, fmt, ap); | |
| 87 if (ret > 0 && ret < UCX_PRINTF_BUFSIZE) { | |
| 88 s.ptr = cxMalloc(a, ret + 1); | |
| 89 if (s.ptr) { | |
| 90 s.length = (size_t) ret; | |
| 91 memcpy(s.ptr, buf, ret); | |
| 92 s.ptr[s.length] = '\0'; | |
| 93 } | |
| 94 } else { | |
| 95 int len = ret + 1; | |
| 96 s.ptr = cxMalloc(a, len); | |
| 97 if (s.ptr) { | |
| 98 ret = vsnprintf(s.ptr, len, fmt, ap2); | |
| 99 if (ret < 0) { | |
| 100 free(s.ptr); | |
| 101 s.ptr = NULL; | |
| 102 } else { | |
| 103 s.length = (size_t) ret; | |
| 104 } | |
| 105 } | |
| 106 } | |
| 107 return s; | |
| 108 } | |
| 109 |
