1 /**************************************************************************** 2 * Copyright (c) 1998-2002,2003 Free Software Foundation, Inc. * 3 * * 4 * Permission is hereby granted, free of charge, to any person obtaining a * 5 * copy of this software and associated documentation files (the * 6 * "Software"), to deal in the Software without restriction, including * 7 * without limitation the rights to use, copy, modify, merge, publish, * 8 * distribute, distribute with modifications, sublicense, and/or sell * 9 * copies of the Software, and to permit persons to whom the Software is * 10 * furnished to do so, subject to the following conditions: * 11 * * 12 * The above copyright notice and this permission notice shall be included * 13 * in all copies or substantial portions of the Software. * 14 * * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 22 * * 23 * Except as contained in this notice, the name(s) of the above copyright * 24 * holders shall not be used in advertising or otherwise to promote the * 25 * sale, use or other dealings in this Software without prior written * 26 * authorization. * 27 ****************************************************************************/ 28 29 /**************************************************************************** 30 * Author: Thomas E. Dickey <dickey@clark.net> 1997 * 31 ****************************************************************************/ 32 /* 33 * trace_buf.c - Tracing/Debugging buffers (attributes) 34 */ 35 36 #include <curses.priv.h> 37 38 MODULE_ID("$Id: trace_buf.c,v 1.12 2003/03/15 21:21:36 tom Exp $") 39 40 typedef struct { 41 char *text; 42 size_t size; 43 } LIST; 44 45 static char * 46 _nc_trace_alloc(int bufnum, size_t want) 47 { 48 char *result = 0; 49 static LIST *list; 50 static size_t have; 51 52 if (bufnum >= 0) { 53 if ((size_t) (bufnum + 1) > have) { 54 size_t need = (bufnum + 1) * 2; 55 if ((list = typeRealloc(LIST, need, list)) == 0) 56 return (0); 57 while (need > have) 58 list[have++].text = 0; 59 } 60 61 if (list[bufnum].text == 0 62 || want > list[bufnum].size) { 63 if ((list[bufnum].text = typeRealloc(char, want, list[bufnum].text)) 64 != 0) 65 list[bufnum].size = want; 66 } 67 68 result = list[bufnum].text; 69 } 70 #if NO_LEAKS 71 else { 72 if (have) { 73 while (have--) { 74 if (list[have].text != 0) 75 free(list[have].text); 76 } 77 free(list); 78 } 79 } 80 #endif 81 return result; 82 } 83 84 /* 85 * (re)Allocate a buffer big enough for the caller's wants. 86 */ 87 NCURSES_EXPORT(char *) 88 _nc_trace_buf(int bufnum, size_t want) 89 { 90 char *result = _nc_trace_alloc(bufnum, want); 91 if (result != 0) 92 *result = '\0'; 93 return result; 94 } 95 96 /* 97 * Append a new string to an existing buffer. 98 */ 99 NCURSES_EXPORT(char *) 100 _nc_trace_bufcat(int bufnum, const char *value) 101 { 102 char *buffer = _nc_trace_alloc(bufnum, 0); 103 size_t have = strlen(buffer); 104 105 buffer = _nc_trace_alloc(bufnum, 1 + have + strlen(value)); 106 (void) strcpy(buffer + have, value); 107 108 return buffer; 109 } 110