projects / vvhitespace / blame
| Commit | Line | Data |
|---|---|---|
| ae1f85a1 AT |
1 | #ifndef VVS_STDLIB_STRING |
| 2 | #define VVS_STDLIB_STRING | |
| 3 | ||
| 4 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | |
| 5 | @ Name: | |
| 6 | @ strlen (100000) | |
| 7 | @ Description: | |
| 8 | @ Counts number of words in a null-terminated string. | |
| 9 | @ Returned number does not include the null-terminator. | |
| 10 | @ Call Stack: | |
| 11 | @ pointer to first character <-- TOS | |
| 12 | @ Return Stack: | |
| 13 | @ number of words in string <-- TOS | |
| 14 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | |
| 15 | NSSVTSSSSSN | Mark: 100000 (strlen) | |
| 16 | ||
| 17 | @ Create a length counter. | |
| 18 | SSSSN | PUSH 0 | |
| 19 | SNT | SWAP | |
| 20 | ||
| 21 | @ Increment the counter (and pointer) on each pass through the loop. | |
| 22 | NSSVSSTSSSSSSSSSSSSSN | Mark: 00100000 00000000 | |
| 23 | SNS | DUP | |
| 24 | TTT | LOAD | |
| 25 | NTSSSTSSSSSSSSSSSSTN | BRZ > 00100000 00000001 | |
| 26 | SNT | SWAP | |
| 27 | SSSTN | PUSH 1 | |
| 28 | TSSS | ADD | |
| 29 | SNT | SWAP | |
| 30 | SSSTN | PUSH 1 | |
| 31 | TSSS | ADD | |
| 32 | NSNSSTSSSSSSSSSSSSSN | JMP > 00100000 00000000 | |
| 33 | ||
| 34 | @ Clean up and return. | |
| 35 | NSSVSSTSSSSSSSSSSSSTN | Mark: 00100000 00000001 | |
| 36 | SNN | DROP | |
| 37 | NTN | RTS | |
| 38 | ||
| 0e0d0a4a AT |
39 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ |
| 40 | @ Name: | |
| 41 | @ isdigit (100001) | |
| 42 | @ Description: | |
| 43 | @ Tests 'character' on stack. Is it an ASCII number? | |
| 44 | @ Returns 1 or 0 representing True/False. | |
| 45 | @ Call Stack: | |
| 46 | @ character <-- TOS | |
| 47 | @ Return Stack: | |
| 48 | @ 1 or 0 <-- TOS | |
| 49 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | |
| 50 | NSSVTSSSSTN | Mark: 100001 (isdigit) | |
| 51 | ||
| 52 | SSSSSTTSSSSN | PUSH 48 (ASCII '0') | |
| 53 | TSST | SUBTRACT | |
| 54 | SNS | DUP | |
| 55 | NTTSSTSSSSTSSSSSSSSN | BMI > 00100001 00000000 (not digit) | |
| 56 | SNS | DUP | |
| 57 | SSSTSTSN | PUSH 10 | |
| 58 | TSST | SUBTRACT | |
| 59 | NTTSSTSSSSTSSSSSSSTN | BMI > 00100001 00000001 (is digit) | |
| 60 | ||
| 61 | NSSVSSTSSSSTSSSSSSSSN | Mark: 00100001 00000000 (not digit) | |
| 62 | SNN | DROP | |
| 63 | SSSSN | PUSH 0 | |
| 64 | NTN | RTS | |
| 65 | ||
| 66 | NSSVSSTSSSSTSSSSSSSTN | Mark: 00100001 00000001 (is digit) | |
| 67 | SNN | DROP | |
| 68 | SSSTN | PUSH 1 | |
| 69 | NTN | RTS | |
| 70 | ||
| fada5085 AT |
71 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ |
| 72 | @ Name: | |
| 73 | @ get_user_string | |
| 74 | @ Description: | |
| 75 | @ Read one line of user input or read buffer_size characters, whichever comes | |
| 76 | @ first, and store at buffer_address. | |
| 77 | @ Appends null terminator to end of string. | |
| 78 | @ Call Stack: | |
| 79 | @ buffer_size (>0) | |
| 80 | @ buffer_address <-- TOS | |
| 81 | @ Return Stack: | |
| 82 | @ <empty> | |
| 83 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | |
| 84 | #include <stack.pvvs> | |
| 85 | NSSVTSSSTSN | MARK: 100010 (get_user_string) | |
| 86 | ||
| 87 | @ Verify we were handed a plausible buffer size. | |
| 88 | SNT | SWAP | |
| 89 | SNS | DUP | |
| 90 | NTSSSTSSSTSSSSSSSSSN | BRZ > 00100010 00000000 (get_user_string:bad_buffer_size) | |
| 91 | SNS | DUP | |
| 92 | NTTSSTSSSTSSSSSSSSSN | BMI > 00100010 00000000 (get_user_string:bad_buffer_size) | |
| 93 | SNT | SWAP | |
| 94 | ||
| 95 | @ Push an offset counter on to the stack for use inside the loop. | |
| 96 | SSSSN | PUSH 0 | |
| 97 | ||
| 98 | @ Get one character from user on each pass through this loop. | |
| 99 | @ TOS> offset, buffer_addr, buffer_size | |
| 100 | NSSVSSTSSSTSSSSSSSSTN | MARK: 00100010 00000001 (get_user_string:main_loop) | |
| 101 | @ Have we reached the end of the buffer? | |
| 102 | SSSTTN | PUSH 3 | |
| 103 | NSTTTSSN | JSR > 1100 (deepdup) | |
| 104 | SSSTSN | PUSH 2 | |
| 105 | NSTTTSSN | JSR > 1100 (deepdup) | |
| 106 | TSST | SUBTRACT | |
| 107 | SSSTN | PUSH 1 | |
| 108 | TSST | SUBTRACT | |
| 109 | NTSSSTSSSTSSSSSSSTTN | BRZ > 00100010 00000011 (get_user_string:end_of_buffer) | |
| 110 | @ Get a character, store it in the buffer, and echo it back to user. | |
| 111 | SNS | DUP | |
| 112 | SSSTTN | PUSH 3 | |
| 113 | NSTTTSSN | JSR > 1100 (deepdup) | |
| 114 | TSSS | ADD | |
| 115 | SNS | DUP | |
| 116 | TNTS | GETCHAR | |
| 117 | TTT | LOAD | |
| 118 | SNS | DUP (for later testing) | |
| 119 | TNSS | PUTCHAR | |
| 120 | @ Did the user press ENTER? | |
| 121 | SSSTSTSN | PUSH 10 (ASCII '\n') | |
| 122 | TSST | SUBTRACT | |
| 123 | NTSSSTSSSTSSSSSSSTSN | BRZ > 00100010 00000010 (get_user_string:end_of_line) | |
| 124 | @ User did not press ENTER. Increment offset and loop again. | |
| 125 | SSSTN | PUSH 1 | |
| 126 | TSSS | ADD | |
| 127 | NSNSSTSSSTSSSSSSSSTN | JMP > 00100010 00000001 (get_user_string:main_loop) | |
| 128 | ||
| 129 | NSSVSSTSSSTSSSSSSSTSN | MARK: 00100010 00000010 (get_user_string:end_of_line) | |
| 130 | TSSS | ADD | |
| 131 | SSSSN | PUSH 0 (ASCII '\0') | |
| 132 | TTS | STORE | |
| 133 | SNN | DROP | |
| 134 | NTN | RTS | |
| 135 | ||
| 136 | NSSVSSTSSSTSSSSSSSTTN | MARK: 00100010 00000011 (get_user_string:end_of_buffer) | |
| 137 | SNN | DROP | |
| 138 | TSSS | ADD | |
| 139 | SSSTN | PUSH 1 | |
| 140 | TSST | SUBTRACT | |
| 141 | SSSSN | PUSH 0 (ASCII '\0') | |
| 142 | TTS | STORE | |
| 143 | NTN | RTS | |
| 144 | ||
| 145 | NSSVSSTSSSTSSSSSSSSSN | MARK: 00100010 00000000 (get_user_string:bad_buffer_size) | |
| 146 | SNN | DROP | |
| 147 | SNN | DROP | |
| 148 | NNN | DIE | |
| 149 | ||
| ae1f85a1 | 150 | #endif |