comparison: ucx/printf.c
ucx/printf.c
- changeset 431
- bb7da585debc
- parent 324
- ce13a778654a
- child 440
- 7c4b9cba09ca
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| 169:fe49cff3c571 | 431:bb7da585debc |
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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 #ifndef CX_PRINTF_SBO_SIZE | |
| 35 #define CX_PRINTF_SBO_SIZE 512 | |
| 36 #endif | |
| 37 unsigned const cx_printf_sbo_size = CX_PRINTF_SBO_SIZE; | |
| 38 | |
| 39 int cx_fprintf( | |
| 40 void *stream, | |
| 41 cx_write_func wfc, | |
| 42 const char *fmt, | |
| 43 ... | |
| 44 ) { | |
| 45 int ret; | |
| 46 va_list ap; | |
| 47 va_start(ap, fmt); | |
| 48 ret = cx_vfprintf(stream, wfc, fmt, ap); | |
| 49 va_end(ap); | |
| 50 return ret; | |
| 51 } | |
| 52 | |
| 53 int cx_vfprintf( | |
| 54 void *stream, | |
| 55 cx_write_func wfc, | |
| 56 const char *fmt, | |
| 57 va_list ap | |
| 58 ) { | |
| 59 char buf[CX_PRINTF_SBO_SIZE]; | |
| 60 va_list ap2; | |
| 61 va_copy(ap2, ap); | |
| 62 int ret = vsnprintf(buf, CX_PRINTF_SBO_SIZE, fmt, ap); | |
| 63 if (ret < 0) { | |
| 64 va_end(ap2); | |
| 65 return ret; | |
| 66 } else if (ret < CX_PRINTF_SBO_SIZE) { | |
| 67 va_end(ap2); | |
| 68 return (int) wfc(buf, 1, ret, stream); | |
| 69 } else { | |
| 70 int len = ret + 1; | |
| 71 char *newbuf = malloc(len); | |
| 72 if (!newbuf) { | |
| 73 va_end(ap2); | |
| 74 return -1; | |
| 75 } | |
| 76 | |
| 77 ret = vsnprintf(newbuf, len, fmt, ap2); | |
| 78 va_end(ap2); | |
| 79 if (ret > 0) { | |
| 80 ret = (int) wfc(newbuf, 1, ret, stream); | |
| 81 } | |
| 82 free(newbuf); | |
| 83 } | |
| 84 return ret; | |
| 85 } | |
| 86 | |
| 87 cxmutstr cx_asprintf_a( | |
| 88 const CxAllocator *allocator, | |
| 89 const char *fmt, | |
| 90 ... | |
| 91 ) { | |
| 92 va_list ap; | |
| 93 va_start(ap, fmt); | |
| 94 cxmutstr ret = cx_vasprintf_a(allocator, fmt, ap); | |
| 95 va_end(ap); | |
| 96 return ret; | |
| 97 } | |
| 98 | |
| 99 cxmutstr cx_vasprintf_a( | |
| 100 const CxAllocator *a, | |
| 101 const char *fmt, | |
| 102 va_list ap | |
| 103 ) { | |
| 104 cxmutstr s; | |
| 105 s.ptr = NULL; | |
| 106 s.length = 0; | |
| 107 char buf[CX_PRINTF_SBO_SIZE]; | |
| 108 va_list ap2; | |
| 109 va_copy(ap2, ap); | |
| 110 int ret = vsnprintf(buf, CX_PRINTF_SBO_SIZE, fmt, ap); | |
| 111 if (ret >= 0 && ret < CX_PRINTF_SBO_SIZE) { | |
| 112 s.ptr = cxMalloc(a, ret + 1); | |
| 113 if (s.ptr) { | |
| 114 s.length = (size_t) ret; | |
| 115 memcpy(s.ptr, buf, ret); | |
| 116 s.ptr[s.length] = '\0'; | |
| 117 } | |
| 118 } else { | |
| 119 int len = ret + 1; | |
| 120 s.ptr = cxMalloc(a, len); | |
| 121 if (s.ptr) { | |
| 122 ret = vsnprintf(s.ptr, len, fmt, ap2); | |
| 123 if (ret < 0) { | |
| 124 free(s.ptr); | |
| 125 s.ptr = NULL; | |
| 126 } else { | |
| 127 s.length = (size_t) ret; | |
| 128 } | |
| 129 } | |
| 130 } | |
| 131 va_end(ap2); | |
| 132 return s; | |
| 133 } | |
| 134 | |
| 135 int cx_sprintf_a(CxAllocator *alloc, char **str, size_t *len, const char *fmt, ... ) { | |
| 136 va_list ap; | |
| 137 va_start(ap, fmt); | |
| 138 int ret = cx_vsprintf_a(alloc, str, len, fmt, ap); | |
| 139 va_end(ap); | |
| 140 return ret; | |
| 141 } | |
| 142 | |
| 143 int cx_vsprintf_a(CxAllocator *alloc, char **str, size_t *len, const char *fmt, va_list ap) { | |
| 144 va_list ap2; | |
| 145 va_copy(ap2, ap); | |
| 146 int ret = vsnprintf(*str, *len, fmt, ap); | |
| 147 if ((unsigned) ret >= *len) { | |
| 148 unsigned newlen = ret + 1; | |
| 149 char *ptr = cxRealloc(alloc, *str, newlen); | |
| 150 if (ptr) { | |
| 151 int newret = vsnprintf(ptr, newlen, fmt, ap2); | |
| 152 if (newret < 0) { | |
| 153 cxFree(alloc, ptr); | |
| 154 } else { | |
| 155 *len = newlen; | |
| 156 *str = ptr; | |
| 157 ret = newret; | |
| 158 } | |
| 159 } | |
| 160 } | |
| 161 va_end(ap2); | |
| 162 return ret; | |
| 163 } | |
| 164 | |
| 165 int cx_sprintf_sa(CxAllocator *alloc, char *buf, size_t *len, char **str, const char *fmt, ... ) { | |
| 166 va_list ap; | |
| 167 va_start(ap, fmt); | |
| 168 int ret = cx_vsprintf_sa(alloc, buf, len, str, fmt, ap); | |
| 169 va_end(ap); | |
| 170 return ret; | |
| 171 } | |
| 172 | |
| 173 int cx_vsprintf_sa(CxAllocator *alloc, char *buf, size_t *len, char **str, const char *fmt, va_list ap) { | |
| 174 va_list ap2; | |
| 175 va_copy(ap2, ap); | |
| 176 int ret = vsnprintf(buf, *len, fmt, ap); | |
| 177 *str = buf; | |
| 178 if ((unsigned) ret >= *len) { | |
| 179 unsigned newlen = ret + 1; | |
| 180 char *ptr = cxMalloc(alloc, newlen); | |
| 181 if (ptr) { | |
| 182 int newret = vsnprintf(ptr, newlen, fmt, ap2); | |
| 183 if (newret < 0) { | |
| 184 cxFree(alloc, ptr); | |
| 185 } else { | |
| 186 *len = newlen; | |
| 187 *str = ptr; | |
| 188 ret = newret; | |
| 189 } | |
| 190 } | |
| 191 } | |
| 192 va_end(ap2); | |
| 193 return ret; | |
| 194 } |
