release/src/router/libncurses/ncurses/trace/trace_buf.c

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  28
  29 /****************************************************************************
  30  *  Author: Thomas E. Dickey                 1997-on                        *
  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 1.17 2011/01/22 19:48:16 tom Exp $")
  39
  40 #ifdef TRACE
  41
  42 #define MyList _nc_globals.tracebuf_ptr
  43 #define MySize _nc_globals.tracebuf_used
  44
  45 static char *
  46 _nc_trace_alloc(int bufnum, size_t want)
  47 {
  48     char *result = 0;
  49
  50     if (bufnum >= 0) {
  51         if ((size_t) (bufnum + 1) > MySize) {
  52             size_t need = (size_t) (bufnum + 1) * 2;
  53             if ((MyList = typeRealloc(TRACEBUF, need, MyList)) != 0) {
  54                 while (need > MySize)
  55                     MyList[MySize++].text = 0;
  56             }
  57         }
  58
  59         if (MyList != 0) {
  60             if (MyList[bufnum].text == 0
  61                 || want > MyList[bufnum].size) {
  62                 MyList[bufnum].text = typeRealloc(char, want, MyList[bufnum].text);
  63                 if (MyList[bufnum].text != 0)
  64                     MyList[bufnum].size = want;
  65             }
  66             result = MyList[bufnum].text;
  67         }
  68     }
  69 #if NO_LEAKS
  70     else {
  71         if (MySize) {
  72             if (MyList) {
  73                 while (MySize--) {
  74                     if (MyList[MySize].text != 0) {
  75                         free(MyList[MySize].text);
  76                     }
  77                 }
  78                 free(MyList);
  79                 MyList = 0;
  80             }
  81             MySize = 0;
  82         }
  83     }
  84 #endif
  85     return result;
  86 }
  87
  88 /*
  89  * (re)Allocate a buffer big enough for the caller's wants.
  90  */
  91 NCURSES_EXPORT(char *)
  92 _nc_trace_buf(int bufnum, size_t want)
  93 {
  94     char *result = _nc_trace_alloc(bufnum, want);
  95     if (result != 0)
  96         *result = '\0';
  97     return result;
  98 }
  99
 100 /*
 101  * Append a new string to an existing buffer.
 102  */
 103 NCURSES_EXPORT(char *)
 104 _nc_trace_bufcat(int bufnum, const char *value)
 105 {
 106     char *buffer = _nc_trace_alloc(bufnum, 0);
 107     if (buffer != 0) {
 108         size_t have = strlen(buffer);
 109
 110         buffer = _nc_trace_alloc(bufnum, 1 + have + strlen(value));
 111         if (buffer != 0)
 112             (void) strcpy(buffer + have, value);
 113
 114     }
 115     return buffer;
 116 }
 117 #else
 118 EMPTY_MODULE(_nc_empty_trace_buf)
 119 #endif /* TRACE */