1 /**************************************************************************** 2 * Copyright 2020 Thomas E. Dickey * 3 * Copyright 1998-2011,2012 Free Software Foundation, Inc. * 4 * * 5 * Permission is hereby granted, free of charge, to any person obtaining a * 6 * copy of this software and associated documentation files (the * 7 * "Software"), to deal in the Software without restriction, including * 8 * without limitation the rights to use, copy, modify, merge, publish, * 9 * distribute, distribute with modifications, sublicense, and/or sell * 10 * copies of the Software, and to permit persons to whom the Software is * 11 * furnished to do so, subject to the following conditions: * 12 * * 13 * The above copyright notice and this permission notice shall be included * 14 * in all copies or substantial portions of the Software. * 15 * * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 23 * * 24 * Except as contained in this notice, the name(s) of the above copyright * 25 * holders shall not be used in advertising or otherwise to promote the * 26 * sale, use or other dealings in this Software without prior written * 27 * authorization. * 28 ****************************************************************************/ 29 30 /**************************************************************************** 31 * Author: Thomas E. Dickey 1997-on * 32 ****************************************************************************/ 33 /* 34 * trace_buf.c - Tracing/Debugging buffers (attributes) 35 */ 36 37 #include <curses.priv.h> 38 39 MODULE_ID("$Id: trace_buf.c,v 1.21 2020/02/02 23:34:34 tom Exp $") 40 41 #ifdef TRACE 42 43 #define MyList _nc_globals.tracebuf_ptr 44 #define MySize _nc_globals.tracebuf_used 45 46 static char * 47 _nc_trace_alloc(int bufnum, size_t want) 48 { 49 char *result = 0; 50 51 if (bufnum >= 0) { 52 if ((size_t) (bufnum + 1) > MySize) { 53 size_t need = (size_t) (bufnum + 1) * 2; 54 if ((MyList = typeRealloc(TRACEBUF, need, MyList)) != 0) { 55 while (need > MySize) 56 MyList[MySize++].text = 0; 57 } 58 } 59 60 if (MyList != 0) { 61 if (MyList[bufnum].text == 0 62 || want > MyList[bufnum].size) { 63 MyList[bufnum].text = typeRealloc(char, want, MyList[bufnum].text); 64 if (MyList[bufnum].text != 0) 65 MyList[bufnum].size = want; 66 } 67 result = MyList[bufnum].text; 68 } 69 } 70 #if NO_LEAKS 71 else { 72 if (MySize) { 73 if (MyList) { 74 while (MySize--) { 75 if (MyList[MySize].text != 0) { 76 free(MyList[MySize].text); 77 } 78 } 79 free(MyList); 80 MyList = 0; 81 } 82 MySize = 0; 83 } 84 } 85 #endif 86 return result; 87 } 88 89 /* 90 * (re)Allocate a buffer big enough for the caller's wants. 91 */ 92 NCURSES_EXPORT(char *) 93 _nc_trace_buf(int bufnum, size_t want) 94 { 95 char *result = _nc_trace_alloc(bufnum, want); 96 if (result != 0) 97 *result = '\0'; 98 return result; 99 } 100 101 /* 102 * Append a new string to an existing buffer. 103 */ 104 NCURSES_EXPORT(char *) 105 _nc_trace_bufcat(int bufnum, const char *value) 106 { 107 char *buffer = _nc_trace_alloc(bufnum, (size_t) 0); 108 if (buffer != 0) { 109 size_t have = strlen(buffer); 110 size_t need = strlen(value) + have; 111 112 buffer = _nc_trace_alloc(bufnum, 1 + need); 113 if (buffer != 0) 114 _nc_STRCPY(buffer + have, value, need); 115 116 } 117 return buffer; 118 } 119 #else 120 EMPTY_MODULE(_nc_empty_trace_buf) 121 #endif /* TRACE */ 122