src/bin/debug/strace/Context.cpp

   1 /*
   2  * Copyright 2007, Haiku Inc. All rights reserved.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Authors:
   6  *              Hugo Santos <hugosantos@gmail.com>
   7  *              Ingo Weinhold <bonefish@cs.tu-berlin.de>
   8  */
   9
  10 #include "Context.h"
  11
  12 #include <stdio.h>
  13 #include <string.h>
  14
  15 string
  16 Context::FormatSigned(int64 value, int bytes) const
  17 {
  18         char tmp[32];
  19
  20         // decimal
  21
  22         if (fDecimal) {
  23                 snprintf(tmp, sizeof(tmp), "%" B_PRId64, value);
  24                 return tmp;
  25         }
  26
  27         // hex
  28
  29         snprintf(tmp, sizeof(tmp), "0x%" B_PRIx64, value);
  30
  31         // Negative numbers are expanded when being converted to int64. Hence
  32         // we skip all but the last 2 * bytes hex digits to retain the original
  33         // type's width.
  34         int len = strlen(tmp);
  35         int offset = len - min_c(len, bytes * 2);
  36
  37         // use the existing "0x" prefix or prepend it again
  38         if (offset <= 2) {
  39                 offset = 0;
  40         } else {
  41                 tmp[--offset] = 'x';
  42                 tmp[--offset] = '0';
  43         }
  44
  45         return tmp + offset;
  46 }
  47
  48 string
  49 Context::FormatUnsigned(uint64 value) const
  50 {
  51         char tmp[32];
  52         snprintf(tmp, sizeof(tmp), fDecimal ? "%" B_PRIu64 : "0x%" B_PRIx64, value);
  53         return tmp;
  54 }
  55
  56 string
  57 Context::FormatFlags(uint64 value) const
  58 {
  59         char tmp[32];
  60         snprintf(tmp, sizeof(tmp), "0x%" B_PRIx64, value);
  61         return tmp;
  62 }
  63
  64 string
  65 Context::FormatPointer(const void *address) const
  66 {
  67         char buffer[32];
  68         sprintf(buffer, "%p", address);
  69         return buffer;
  70 }