| 1 | command IF <operand1> <cmp-op> <operand2> <command> [<label>] |
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| 2 | ========== |
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| 3 | |
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| 4 | key: conditional execution |
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| 5 | |
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| 6 | Valid only in command procedures. Evaluates the condition |
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| 7 | "<operand1> <cmp-op> <operand2>" and executes the command <command> |
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| 8 | if the result is TRUE. |
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| 9 | |
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| 10 | |
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| 11 | parameters: |
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| 12 | |
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| 13 | <operand1>, <operand2> --- parameter type: depends on <cmp-op> (see below) |
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| 14 | Operands to be compared. |
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| 15 | |
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| 16 | <cmp-op> --- parameter type: string |
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| 17 | Compare operation which determines the manner of comparison and data |
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| 18 | type of both operands. Valid operators are listed below: |
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| 19 | |
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| 20 | integer operations |
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| 21 | EQI <operand1> is equal to <operand2> |
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| 22 | NEI <operand1> is not equal to <operand2> |
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| 23 | GTI <operand1> is greater than <operand2> |
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| 24 | GEI <operand1> is greater than or equal to <operand2> |
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| 25 | LTI <operand1> is less than <operand2> |
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| 26 | LEI <operand1> is less than or equal to <operand2> |
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| 27 | |
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| 28 | real operations |
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| 29 | EQR <operand1> is equal to <operand2> |
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| 30 | NER <operand1> is not equal to <operand2> |
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| 31 | GTR <operand1> is greater than <operand2> |
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| 32 | GER <operand1> is greater than or equal to <operand2> |
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| 33 | LTR <operand1> is less than <operand2> |
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| 34 | LER <operand1> is less than or equal to <operand2> |
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| 35 | |
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| 36 | string operations |
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| 37 | EQS <operand1> is equal to <operand2> |
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| 38 | NES <operand1> is not equal to <operand2> |
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| 39 | |
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| 40 | <command> --- parameter type: string |
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| 41 | Command to be executed if the compare operation results TRUE. Possible |
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| 42 | choices are: |
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| 43 | GOTO (<label> must be passed as 5-th parameter) |
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| 44 | RETURN (returns to parent command level, see RETURN command) |
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| 45 | |
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| 46 | <label> --- parameter type: string |
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| 47 | If <command> equals GOTO this is the destination label. |
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| 48 | |
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| 49 | |
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| 50 | qualifiers |
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| 51 | |
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| 52 | /FORWARD |
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| 53 | Only valid if <command> is GOTO, forward jump (see GOTO command). |
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| 54 | |
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| 55 | |
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| 56 | examples: |
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| 57 | |
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| 58 | IF "TRCCNT GTI $DSPTRCS GOTO/FORWARD LOOP_EXIT: |
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| 59 | if symbol "TRCCNT" is greater than the number of traces |
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| 60 | on display jump forward to label LOOP_EXIT: |
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| 61 | |
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| 62 | IF $STATUS NEI 0 RETURN |
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| 63 | if previous command created an error return from command procedure |
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| 64 | |
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