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annotate util.c @ 555:5af986d2b9da

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Start work on refactoring some of the backend code to allow more sharing between M68K and Z80 cores and possibly also between x86 and the ARM backend when it exists
author Michael Pavone <pavone@retrodev.com>
date Mon, 24 Feb 2014 00:39:02 -0800
parents 32da1e0d5e55
children 6b248602ab84 80a67be1770b
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rev   line source
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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diff changeset
132 break;
6fc71114d145 Extract function to determine executable directory from load_config so it can be used elsewhere
Mike Pavone <pavone@retrodev.com>
parents: 495
diff changeset
133 }
6fc71114d145 Extract function to determine executable directory from load_config so it can be used elsewhere
Mike Pavone <pavone@retrodev.com>
parents: 495
diff changeset
134 }
6fc71114d145 Extract function to determine executable directory from load_config so it can be used elsewhere
Mike Pavone <pavone@retrodev.com>
parents: 495
diff changeset
135 } else {
6fc71114d145 Extract function to determine executable directory from load_config so it can be used elsewhere
Mike Pavone <pavone@retrodev.com>
parents: 495
diff changeset
136 exe_dir = linktext;
6fc71114d145 Extract function to determine executable directory from load_config so it can be used elsewhere
Mike Pavone <pavone@retrodev.com>
parents: 495
diff changeset
137 }
6fc71114d145 Extract function to determine executable directory from load_config so it can be used elsewhere
Mike Pavone <pavone@retrodev.com>
parents: 495
diff changeset
138 }
6fc71114d145 Extract function to determine executable directory from load_config so it can be used elsewhere
Mike Pavone <pavone@retrodev.com>
parents: 495
diff changeset
139 return exe_dir;
6fc71114d145 Extract function to determine executable directory from load_config so it can be used elsewhere
Mike Pavone <pavone@retrodev.com>
parents: 495
diff changeset
140 }