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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 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 | } |