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Rev | Author | Line No. | Line |
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3749 | GerdtR | 1 | ;**************************************** |
2 | ;* input: esi = pointer to string * |
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3 | ;* output: ecx = length of the string * |
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4 | ;**************************************** |
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5 | strlen: |
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6 | push eax esi |
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7 | xor ecx, ecx |
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8 | @@: |
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9 | lodsb |
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10 | or al, al |
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11 | jz @f |
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12 | inc ecx |
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13 | jmp @b |
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14 | @@: |
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15 | pop esi eax |
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16 | ret |
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17 | |||
18 | ;************************************************* |
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19 | ;* input: esi = pointer to the src string * |
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20 | ;* edi = pointer to the dest string * |
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21 | ;* ecx = number of bytes to copy * |
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22 | ;************************************************* |
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23 | strncpy: |
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24 | push eax ecx esi edi |
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25 | @@: |
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26 | lodsb |
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27 | stosb |
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28 | or al, al |
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29 | jz @f |
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30 | dec ecx |
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31 | jz @f |
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32 | jmp @b |
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33 | @@: |
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34 | pop edi esi ecx eax |
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35 | ret |
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36 | |||
37 | ;************************************************* |
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38 | ;* input: esi = pointer to the src string * |
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39 | ;* edi = pointer to the dest string * |
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40 | ;************************************************* |
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41 | strcpy: |
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42 | push esi edi |
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43 | rep movsb |
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44 | pop edi esi |
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45 | ret |
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46 | |||
47 | ;************************************************* |
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48 | ;* input: esi = pointer to the src string * |
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49 | ;* edi = pointer to the dest string * |
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50 | ;************************************************* |
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51 | strcat: |
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52 | push esi |
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53 | call strlen |
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54 | add esi, ecx |
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55 | call strcpy |
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56 | pop esi |
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57 | ret |
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58 | |||
59 | ;************************************************* |
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60 | ;* input: esi = pointer to the src string * |
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61 | ;* edi = pointer to the dest string * |
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62 | ;* ecx = number of bytes to copy * |
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63 | ;************************************************* |
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64 | strncat: |
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65 | push edi |
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66 | push ecx esi |
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67 | mov esi, edi |
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68 | call strlen |
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69 | add edi, ecx |
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70 | pop esi ecx |
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71 | call strncpy |
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72 | pop edi |
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73 | ret |
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74 | |||
75 | ;************************************************* |
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76 | ;* input: edi = pointer to the dest string * |
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77 | ;* al = byte to set the string to * |
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78 | ;************************************************* |
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79 | ;strset: |
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80 | ; push edi |
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81 | ; rep stosb |
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82 | ; pop edi |
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83 | ; ret |
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84 | |||
85 | ;************************************************* |
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86 | ;* input: edi = pointer to the dest string * |
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87 | ;* al = byte to set the string to * |
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88 | ;* ecx = number of bytes to set * |
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89 | ;************************************************* |
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90 | strnset: |
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91 | push edi ecx |
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92 | repe stosb |
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93 | pop ecx edi |
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94 | ret |