FreeCalypso > hg > freecalypso-sw
annotate target-utils/libtiffs/findfile.c @ 915:7b805007dcfc
etmsync: slight "main" refactoring in preparation for multiple programs
author | Space Falcon <falcon@ivan.Harhan.ORG> |
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date | Tue, 08 Sep 2015 18:26:42 +0000 |
parents | 2900fe603f8a |
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rev | line source |
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1 #include <sys/types.h> |
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2 #include "types.h" |
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3 #include "struct.h" |
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4 #include "globals.h" |
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5 #include "macros.h" |
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6 |
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7 static u8 * |
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8 find_endofchunk(ino) |
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9 { |
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10 struct inode *irec = mpffs_active_index + ino; |
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11 u8 *p; |
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12 int i; |
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13 |
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14 p = inode_to_dataptr(irec) + irec->len; |
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15 for (i = 0; i < 16; i++) { |
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16 p--; |
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17 if (!*p) |
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18 return(p); |
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19 if (*p != 0xFF) |
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20 break; |
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21 } |
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22 printf("Error: inode #%x has no valid termination\n", ino); |
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23 return(p); /* XXX */ |
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24 } |
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25 |
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26 mpffs_find_file(pathname, startret, sizeret, continue_ret) |
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27 char *pathname; |
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28 u8 **startret; |
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29 size_t *sizeret; |
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30 int *continue_ret; |
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31 { |
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32 int ino, cont; |
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33 struct inode *irec; |
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34 u8 *start, *end; |
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35 int size; |
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36 |
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37 ino = mpffs_pathname_to_inode(pathname); |
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38 if (ino <= 0) |
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39 return(-1); |
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40 irec = mpffs_active_index + ino; |
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41 if (irec->type != OBJTYPE_FILE) { |
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42 printf("Error: %s is not a regular file\n", pathname); |
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43 return(-1); |
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44 } |
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45 start = inode_to_dataptr(irec); |
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46 start += strlen(start) + 1; |
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47 end = find_endofchunk(ino); |
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48 size = end - start; |
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49 if (size < 0) |
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50 size = 0; |
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51 cont = irec->descend; |
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52 if (cont == 0xFFFF) |
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53 cont = 0; |
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54 if (startret) |
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55 *startret = start; |
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56 if (sizeret) |
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57 *sizeret = size; |
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58 if (continue_ret) |
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59 *continue_ret = cont; |
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60 return(0); |
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61 } |
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62 |
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63 mpffs_get_segment(ino, startret, sizeret, continue_ret) |
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64 int ino; |
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65 u8 **startret; |
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66 size_t *sizeret; |
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67 int *continue_ret; |
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68 { |
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69 int cont; |
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70 struct inode *irec; |
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71 u8 *start, *end; |
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72 int size; |
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73 |
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74 for (;;) { |
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75 irec = mpffs_active_index + ino; |
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76 if (irec->type) |
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77 break; |
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78 if (irec->sibling == 0xFFFF) { |
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79 printf("Error: segment inode #%d: deleted and no sibling\n", |
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80 ino); |
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81 return(-1); |
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82 } |
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83 ino = irec->sibling; |
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84 } |
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85 if (irec->type != OBJTYPE_SEGMENT) { |
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86 printf("Error: inode #%x is not a segment\n", ino); |
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87 return(-1); |
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88 } |
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89 start = inode_to_dataptr(irec); |
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90 end = find_endofchunk(ino); |
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91 size = end - start; |
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92 if (size <= 0) { |
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93 printf("Error: segment inode #%x: bad length\n", ino); |
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94 return(-1); |
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95 } |
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96 cont = irec->descend; |
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97 if (cont == 0xFFFF) |
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98 cont = 0; |
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99 if (startret) |
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100 *startret = start; |
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101 if (sizeret) |
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102 *sizeret = size; |
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103 if (continue_ret) |
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104 *continue_ret = cont; |
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105 return(0); |
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106 } |