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Rev | Author | Line No. | Line |
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56 | pj | 1 | /* |
2 | * PC/HW routine collection v1.2 for DOS/DJGPP |
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3 | * |
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4 | * Copyright (C) 2002 - Borca Daniel |
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5 | * Email : dborca@yahoo.com |
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6 | * Web : http://www.geocities.com/dborca |
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7 | */ |
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8 | |||
9 | |||
10 | #include <dpmi.h> |
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11 | #include <fcntl.h> |
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12 | #include <sys/stat.h> /* for mode definitions */ |
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13 | #include <stdio.h> |
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14 | #include <stdlib.h> |
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15 | #include <unistd.h> |
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16 | |||
17 | #include "pc_hw.h" |
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18 | |||
19 | /* |
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20 | * atexit |
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21 | */ |
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22 | #define MAX_ATEXIT 32 |
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23 | |||
24 | static volatile int atexitcnt; |
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25 | static VFUNC atexittbl[MAX_ATEXIT]; |
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26 | |||
27 | static void __attribute__((destructor)) doexit (void) |
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28 | { |
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29 | while (atexitcnt) atexittbl[--atexitcnt](); |
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30 | } |
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31 | |||
32 | int pc_clexit (VFUNC f) |
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33 | { |
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34 | int i; |
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35 | |||
36 | for (i=0;i<atexitcnt;i++) { |
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37 | if (atexittbl[i]==f) { |
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38 | for (atexitcnt--;i<atexitcnt;i++) atexittbl[i] = atexittbl[i+1]; |
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39 | atexittbl[i] = 0; |
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40 | return 0; |
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41 | } |
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42 | } |
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43 | return -1; |
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44 | } |
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45 | |||
46 | int pc_atexit (VFUNC f) |
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47 | { |
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48 | pc_clexit(f); |
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49 | if (atexitcnt<MAX_ATEXIT) { |
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50 | atexittbl[atexitcnt++] = f; |
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51 | return 0; |
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52 | } |
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53 | return -1; |
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54 | } |
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55 | |||
56 | /* |
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57 | * locked memory allocation |
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58 | */ |
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59 | void *pc_malloc (size_t size) |
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60 | { |
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61 | void *p = malloc(size); |
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62 | |||
63 | if (p) { |
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64 | if (_go32_dpmi_lock_data(p, size)) { |
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65 | free(p); |
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66 | return NULL; |
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67 | } |
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68 | } |
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69 | |||
70 | return p; |
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71 | } |
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72 | |||
73 | /* |
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74 | * standard redirection |
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75 | */ |
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76 | static int h_out, h_outbak, h_err, h_errbak; |
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77 | |||
78 | int pc_open_stdout (void) |
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79 | { |
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80 | if ((h_out=open(tmpnam(NULL), O_WRONLY | O_CREAT | O_TRUNC | O_TEXT | O_TEMPORARY, S_IRUSR | S_IWUSR)) >= 0) { |
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81 | if ((h_outbak=dup(1)) != -1) { |
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82 | fflush(stdout); |
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83 | if (dup2(h_out, 1) != -1) { |
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84 | return 0; |
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85 | } |
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86 | close(h_outbak); |
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87 | } |
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88 | close(h_out); |
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89 | } |
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90 | return (h_out = -1); |
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91 | } |
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92 | |||
93 | void pc_close_stdout (void) |
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94 | { |
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95 | FILE *f; |
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96 | char *line = alloca(512); |
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97 | |||
98 | if (h_out >= 0) { |
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99 | dup2(h_outbak, 1); |
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100 | close(h_outbak); |
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101 | |||
102 | if ((f=fdopen(h_out, "r")) != NULL) { |
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103 | fseek(f, 0, SEEK_SET); |
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104 | while (fgets(line, 512, f)) { |
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105 | fputs(line, stdout); |
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106 | } |
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107 | fclose(f); |
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108 | } else { |
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109 | close(h_out); |
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110 | } |
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111 | } |
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112 | } |
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113 | |||
114 | int pc_open_stderr (void) |
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115 | { |
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116 | if ((h_err=open(tmpnam(NULL), O_WRONLY | O_CREAT | O_TRUNC | O_TEXT | O_TEMPORARY, S_IRUSR | S_IWUSR)) >= 0) { |
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117 | if ((h_errbak=dup(2)) != -1) { |
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118 | fflush(stderr); |
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119 | if (dup2(h_err, 2) != -1) { |
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120 | return 0; |
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121 | } |
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122 | close(h_errbak); |
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123 | } |
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124 | close(h_err); |
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125 | } |
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126 | return (h_err = -1); |
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127 | } |
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128 | |||
129 | void pc_close_stderr (void) |
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130 | { |
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131 | FILE *f; |
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132 | char *line = alloca(512); |
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133 | |||
134 | if (h_err >= 0) { |
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135 | dup2(h_errbak, 2); |
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136 | close(h_errbak); |
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137 | |||
138 | if ((f=fdopen(h_err, "r")) != NULL) { |
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139 | fseek(f, 0, SEEK_SET); |
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140 | while (fgets(line, 512, f)) { |
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141 | fputs(line, stderr); |
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142 | } |
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143 | fclose(f); |
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144 | } else { |
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145 | close(h_err); |
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146 | } |
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147 | } |
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148 | } |