Mercurial > repos > blastem
annotate util.c @ 564:316facea756d
Fix PC displacement mode check in disassembler so that jmps involving a register are handled correctly
author | Michael Pavone <pavone@retrodev.com> |
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date | Sat, 01 Mar 2014 17:07:33 -0800 |
parents | 32da1e0d5e55 |
children | 6b248602ab84 80a67be1770b |
rev | line source |
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495
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1 #include <string.h> |
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2 #include <stdlib.h> |
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3 #include <stdio.h> |
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4 #include <ctype.h> |
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5 |
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6 #include <sys/types.h> |
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7 #include <sys/stat.h> |
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8 #include <unistd.h> |
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9 |
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10 char * alloc_concat(char * first, char * second) |
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11 { |
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12 int flen = strlen(first); |
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13 int slen = strlen(second); |
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14 char * ret = malloc(flen + slen + 1); |
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15 memcpy(ret, first, flen); |
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16 memcpy(ret+flen, second, slen+1); |
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17 return ret; |
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18 } |
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19 |
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20 char * alloc_concat_m(int num_parts, char ** parts) |
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21 { |
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22 int total = 0; |
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23 for (int i = 0; i < num_parts; i++) { |
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24 total += strlen(parts[i]); |
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25 } |
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26 char * ret = malloc(total + 1); |
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27 *ret = 0; |
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28 for (int i = 0; i < num_parts; i++) { |
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29 strcat(ret, parts[i]); |
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30 } |
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31 return ret; |
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32 } |
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33 |
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34 long file_size(FILE * f) |
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35 { |
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36 fseek(f, 0, SEEK_END); |
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37 long fsize = ftell(f); |
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38 fseek(f, 0, SEEK_SET); |
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39 return fsize; |
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40 } |
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41 |
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42 char * strip_ws(char * text) |
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43 { |
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44 while (*text && (!isprint(*text) || isblank(*text))) |
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45 { |
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46 text++; |
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47 } |
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48 char * ret = text; |
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49 text = ret + strlen(ret) - 1; |
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50 while (text > ret && (!isprint(*text) || isblank(*text))) |
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51 { |
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52 *text = 0; |
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53 text--; |
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54 } |
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55 return ret; |
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56 } |
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57 |
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58 char * split_keyval(char * text) |
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59 { |
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60 while (*text && !isblank(*text)) |
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61 { |
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62 text++; |
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63 } |
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64 if (!*text) { |
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65 return text; |
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66 } |
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67 *text = 0; |
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68 return text+1; |
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69 } |
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70 |
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71 static char * exe_str; |
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72 |
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73 void set_exe_str(char * str) |
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74 { |
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75 exe_str = str; |
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76 } |
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77 |
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78 char * readlink_alloc(char * path) |
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79 { |
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80 char * linktext = NULL; |
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81 ssize_t linksize = 512; |
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82 ssize_t cursize = 0; |
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83 do { |
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84 if (linksize > cursize) { |
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85 cursize = linksize; |
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86 if (linktext) { |
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87 free(linktext); |
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88 } |
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89 } |
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90 linktext = malloc(cursize); |
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91 linksize = readlink(path, linktext, cursize-1); |
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92 if (linksize == -1) { |
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93 perror("readlink"); |
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94 free(linktext); |
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95 linktext = NULL; |
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96 } |
549
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97 } while ((linksize+1) > cursize); |
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98 linktext[linksize] = 0; |
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99 return linktext; |
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100 } |
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101 |
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102 char * get_exe_dir() |
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103 { |
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104 static char * exe_dir; |
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105 if (!exe_dir) { |
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106 char * linktext = readlink_alloc("/proc/self/exe"); |
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107 if (!linktext) { |
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108 goto fallback; |
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109 } |
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110 char * cur; |
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111 int linksize = strlen(linktext); |
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112 for(cur = linktext + linksize - 1; cur != linktext; cur--) |
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113 { |
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114 if (*cur == '/') { |
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115 *cur = 0; |
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116 break; |
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117 } |
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118 } |
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119 if (cur == linktext) { |
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120 free(linktext); |
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121 fallback: |
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122 if (!exe_str) { |
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123 fputs("/proc/self/exe is not available and set_exe_str was not called!", stderr); |
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124 } |
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125 int pathsize = strlen(exe_str); |
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126 for(cur = exe_str + pathsize - 1; cur != exe_str; cur--) |
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127 { |
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128 if (*cur == '/') { |
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129 exe_dir = malloc(cur-exe_str+1); |
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130 memcpy(exe_dir, exe_str, cur-exe_str); |
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131 exe_dir[cur-exe_str] = 0; |
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132 break; |
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133 } |
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134 } |
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135 } else { |
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136 exe_dir = linktext; |
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137 } |
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138 } |
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139 return exe_dir; |
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140 } |