diff options
Diffstat (limited to 'gcc/ada/switch.adb')
| -rw-r--r-- | gcc/ada/switch.adb | 1307 |
1 files changed, 12 insertions, 1295 deletions
diff --git a/gcc/ada/switch.adb b/gcc/ada/switch.adb index 53ed7ae1b89..30701cabf0c 100644 --- a/gcc/ada/switch.adb +++ b/gcc/ada/switch.adb @@ -26,67 +26,23 @@ -- -- ------------------------------------------------------------------------------ --- Option switch scanning for both the compiler and the binder - --- Note: this version of the package should be usable in both Unix and DOS - -with Debug; use Debug; -with Osint; use Osint; -with Opt; use Opt; -with Validsw; use Validsw; -with Stylesw; use Stylesw; -with Types; use Types; - -with System.WCh_Con; use System.WCh_Con; - package body Switch is - Bad_Switch : exception; - -- Exception raised if bad switch encountered - - Bad_Switch_Value : exception; - -- Exception raised if bad switch value encountered - - Missing_Switch_Value : exception; - -- Exception raised if no switch value encountered - - Too_Many_Output_Files : exception; - -- Exception raised if the -o switch is encountered more than once - - Switch_Max_Value : constant := 999; - -- Maximum value permitted in switches that take a value - - procedure Scan_Nat - (Switch_Chars : String; - Max : Integer; - Ptr : in out Integer; - Result : out Nat); - -- Scan natural integer parameter for switch. On entry, Ptr points - -- just past the switch character, on exit it points past the last - -- digit of the integer value. - - procedure Scan_Pos - (Switch_Chars : String; - Max : Integer; - Ptr : in out Integer; - Result : out Pos); - -- Scan positive integer parameter for switch. On entry, Ptr points - -- just past the switch character, on exit it points past the last - -- digit of the integer value. - ------------------------- -- Is_Front_End_Switch -- ------------------------- function Is_Front_End_Switch (Switch_Chars : String) return Boolean is - Ptr : constant Positive := Switch_Chars'First; + Ptr : constant Positive := Switch_Chars'First; + begin return Is_Switch (Switch_Chars) and then - (Switch_Chars (Ptr + 1) = 'I' - or else - (Switch_Chars'Length >= 5 - and then Switch_Chars (Ptr + 1 .. Ptr + 4) = "gnat")); + (Switch_Chars (Ptr + 1) = 'I' + or else (Switch_Chars'Length >= 5 + and then Switch_Chars (Ptr + 1 .. Ptr + 4) = "gnat") + or else (Switch_Chars'Length >= 5 + and then Switch_Chars (Ptr + 1 .. Ptr + 4) = "fRTS")); end Is_Front_End_Switch; --------------- @@ -96,1252 +52,10 @@ package body Switch is function Is_Switch (Switch_Chars : String) return Boolean is begin return Switch_Chars'Length > 1 - and then (Switch_Chars (Switch_Chars'First) = '-' - or - Switch_Chars (Switch_Chars'First) = Switch_Character); + and then Switch_Chars (Switch_Chars'First) = '-'; end Is_Switch; - -------------------------- - -- Scan_Binder_Switches -- - -------------------------- - - procedure Scan_Binder_Switches (Switch_Chars : String) is - Ptr : Integer := Switch_Chars'First; - Max : Integer := Switch_Chars'Last; - C : Character := ' '; - - begin - -- Skip past the initial character (must be the switch character) - - if Ptr = Max then - raise Bad_Switch; - else - Ptr := Ptr + 1; - end if; - - -- A little check, "gnat" at the start of a switch is not allowed - -- except for the compiler - - if Switch_Chars'Last >= Ptr + 3 - and then Switch_Chars (Ptr .. Ptr + 3) = "gnat" - then - Osint.Fail ("invalid switch: """, Switch_Chars, """" - & " (gnat not needed here)"); - - end if; - - -- Loop to scan through switches given in switch string - - while Ptr <= Max loop - C := Switch_Chars (Ptr); - - case C is - - -- Processing for A switch - - when 'A' => - Ptr := Ptr + 1; - - Ada_Bind_File := True; - - -- Processing for b switch - - when 'b' => - Ptr := Ptr + 1; - Brief_Output := True; - - -- Processing for c switch - - when 'c' => - Ptr := Ptr + 1; - - Check_Only := True; - - -- Processing for C switch - - when 'C' => - Ptr := Ptr + 1; - - Ada_Bind_File := False; - - -- Processing for d switch - - when 'd' => - - -- Note: for the debug switch, the remaining characters in this - -- switch field must all be debug flags, since all valid switch - -- characters are also valid debug characters. - - -- Loop to scan out debug flags - - while Ptr < Max loop - Ptr := Ptr + 1; - C := Switch_Chars (Ptr); - exit when C = ASCII.NUL or else C = '/' or else C = '-'; - - if C in '1' .. '9' or else - C in 'a' .. 'z' or else - C in 'A' .. 'Z' - then - Set_Debug_Flag (C); - else - raise Bad_Switch; - end if; - end loop; - - -- Make sure Zero_Cost_Exceptions is set if gnatdX set. This - -- is for backwards compatibility with old versions and usage. - - if Debug_Flag_XX then - Zero_Cost_Exceptions_Set := True; - Zero_Cost_Exceptions_Val := True; - end if; - - return; - - -- Processing for e switch - - when 'e' => - Ptr := Ptr + 1; - Elab_Dependency_Output := True; - - -- Processing for E switch - - when 'E' => - Ptr := Ptr + 1; - Exception_Tracebacks := True; - - -- Processing for f switch - - when 'f' => - Ptr := Ptr + 1; - Force_RM_Elaboration_Order := True; - - -- Processing for g switch - - when 'g' => - Ptr := Ptr + 1; - - if Ptr <= Max then - C := Switch_Chars (Ptr); - - if C in '0' .. '3' then - Debugger_Level := - Character'Pos - (Switch_Chars (Ptr)) - Character'Pos ('0'); - Ptr := Ptr + 1; - end if; - - else - Debugger_Level := 2; - end if; - - -- Processing for G switch - - when 'G' => - Ptr := Ptr + 1; - Print_Generated_Code := True; - - -- Processing for h switch - - when 'h' => - Ptr := Ptr + 1; - Usage_Requested := True; - - -- Processing for i switch - - when 'i' => - if Ptr = Max then - raise Bad_Switch; - end if; - - Ptr := Ptr + 1; - C := Switch_Chars (Ptr); - - if C in '1' .. '5' - or else C = '8' - or else C = 'p' - or else C = 'f' - or else C = 'n' - or else C = 'w' - then - Identifier_Character_Set := C; - Ptr := Ptr + 1; - else - raise Bad_Switch; - end if; - - -- Processing for K switch - - when 'K' => - Ptr := Ptr + 1; - - if Program = Binder then - Output_Linker_Option_List := True; - else - raise Bad_Switch; - end if; - - -- Processing for l switch - - when 'l' => - Ptr := Ptr + 1; - Elab_Order_Output := True; - - -- Processing for m switch - - when 'm' => - Ptr := Ptr + 1; - Scan_Pos (Switch_Chars, Max, Ptr, Maximum_Errors); - - -- Processing for n switch - - when 'n' => - Ptr := Ptr + 1; - Bind_Main_Program := False; - - -- Note: The -L option of the binder also implies -n, so - -- any change here must also be reflected in the processing - -- for -L that is found in Gnatbind.Scan_Bind_Arg. - - -- Processing for o switch - - when 'o' => - Ptr := Ptr + 1; - - if Output_File_Name_Present then - raise Too_Many_Output_Files; - - else - Output_File_Name_Present := True; - end if; - - -- Processing for O switch - - when 'O' => - Ptr := Ptr + 1; - Output_Object_List := True; - - -- Processing for p switch - - when 'p' => - Ptr := Ptr + 1; - Pessimistic_Elab_Order := True; - - -- Processing for q switch - - when 'q' => - Ptr := Ptr + 1; - Quiet_Output := True; - - -- Processing for s switch - - when 's' => - Ptr := Ptr + 1; - All_Sources := True; - Check_Source_Files := True; - - -- Processing for t switch - - when 't' => - Ptr := Ptr + 1; - Tolerate_Consistency_Errors := True; - - -- Processing for T switch - - when 'T' => - Ptr := Ptr + 1; - Time_Slice_Set := True; - Scan_Nat (Switch_Chars, Max, Ptr, Time_Slice_Value); - - -- Processing for v switch - - when 'v' => - Ptr := Ptr + 1; - Verbose_Mode := True; - - -- Processing for w switch - - when 'w' => - - -- For the binder we only allow suppress/error cases - - Ptr := Ptr + 1; - - case Switch_Chars (Ptr) is - - when 'e' => - Warning_Mode := Treat_As_Error; - - when 's' => - Warning_Mode := Suppress; - - when others => - raise Bad_Switch; - end case; - - Ptr := Ptr + 1; - - -- Processing for W switch - - when 'W' => - Ptr := Ptr + 1; - - for J in WC_Encoding_Method loop - if Switch_Chars (Ptr) = WC_Encoding_Letters (J) then - Wide_Character_Encoding_Method := J; - exit; - - elsif J = WC_Encoding_Method'Last then - raise Bad_Switch; - end if; - end loop; - - Upper_Half_Encoding := - Wide_Character_Encoding_Method in - WC_Upper_Half_Encoding_Method; - - Ptr := Ptr + 1; - - -- Processing for x switch - - when 'x' => - Ptr := Ptr + 1; - All_Sources := False; - Check_Source_Files := False; - - -- Processing for z switch - - when 'z' => - Ptr := Ptr + 1; - No_Main_Subprogram := True; - - -- Ignore extra switch character - - when '/' | '-' => - Ptr := Ptr + 1; - - -- Anything else is an error (illegal switch character) - - when others => - raise Bad_Switch; - end case; - end loop; - - exception - when Bad_Switch => - Osint.Fail ("invalid switch: ", (1 => C)); - - when Bad_Switch_Value => - Osint.Fail ("numeric value too big for switch: ", (1 => C)); - - when Missing_Switch_Value => - Osint.Fail ("missing numeric value for switch: ", (1 => C)); - - when Too_Many_Output_Files => - Osint.Fail ("duplicate -o switch"); - end Scan_Binder_Switches; - - ----------------------------- - -- Scan_Front_End_Switches -- - ----------------------------- - - procedure Scan_Front_End_Switches (Switch_Chars : String) is - Switch_Starts_With_Gnat : Boolean; - Ptr : Integer := Switch_Chars'First; - Max : constant Integer := Switch_Chars'Last; - C : Character := ' '; - - begin - -- Skip past the initial character (must be the switch character) - - if Ptr = Max then - raise Bad_Switch; - - else - Ptr := Ptr + 1; - end if; - - -- A little check, "gnat" at the start of a switch is not allowed - -- except for the compiler (where it was already removed) - - Switch_Starts_With_Gnat := - Ptr + 3 <= Max and then Switch_Chars (Ptr .. Ptr + 3) = "gnat"; - - if Switch_Starts_With_Gnat then - Ptr := Ptr + 4; - end if; - - -- Loop to scan through switches given in switch string - - while Ptr <= Max loop - C := Switch_Chars (Ptr); - - -- Processing for a switch - - case Switch_Starts_With_Gnat is - - when False => - -- There is only one front-end switch that - -- does not start with -gnat, namely -I - - case C is - - when 'I' => - Ptr := Ptr + 1; - - if Ptr > Max then - raise Bad_Switch; - end if; - - -- Find out whether this is a -I- or regular -Ixxx switch - - if Ptr = Max and then Switch_Chars (Ptr) = '-' then - Look_In_Primary_Dir := False; - - else - Add_Src_Search_Dir (Switch_Chars (Ptr .. Max)); - end if; - - Ptr := Max + 1; - - when others => - -- Should not happen, as Scan_Switches is supposed - -- to be called for front-end switches only. - -- Still, it is safest to raise Bad_Switch error. - - raise Bad_Switch; - end case; - - when True => - -- Process -gnat* options - - case C is - - when 'a' => - Ptr := Ptr + 1; - Assertions_Enabled := True; - - -- Processing for A switch - - when 'A' => - Ptr := Ptr + 1; - Config_File := False; - - -- Processing for b switch - - when 'b' => - Ptr := Ptr + 1; - Brief_Output := True; - - -- Processing for c switch - - when 'c' => - Ptr := Ptr + 1; - Operating_Mode := Check_Semantics; - - -- Processing for C switch - - when 'C' => - Ptr := Ptr + 1; - Compress_Debug_Names := True; - - -- Processing for d switch - - when 'd' => - - -- Note: for the debug switch, the remaining characters in this - -- switch field must all be debug flags, since all valid switch - -- characters are also valid debug characters. - - -- Loop to scan out debug flags - - while Ptr < Max loop - Ptr := Ptr + 1; - C := Switch_Chars (Ptr); - exit when C = ASCII.NUL or else C = '/' or else C = '-'; - - if C in '1' .. '9' or else - C in 'a' .. 'z' or else - C in 'A' .. 'Z' - then - Set_Debug_Flag (C); - - else - raise Bad_Switch; - end if; - end loop; - - -- Make sure Zero_Cost_Exceptions is set if gnatdX set. This - -- is for backwards compatibility with old versions and usage. - - if Debug_Flag_XX then - Zero_Cost_Exceptions_Set := True; - Zero_Cost_Exceptions_Val := True; - end if; - - return; - - -- Processing for D switch - - when 'D' => - Ptr := Ptr + 1; - - -- Note: -gnatD also sets -gnatx (to turn off cross-reference - -- generation in the ali file) since otherwise this generation - -- gets confused by the "wrong" Sloc values put in the tree. - - Debug_Generated_Code := True; - Xref_Active := False; - Set_Debug_Flag ('g'); - - -- Processing for e switch - - when 'e' => - Ptr := Ptr + 1; - - if Ptr > Max then - raise Bad_Switch; - end if; - - case Switch_Chars (Ptr) is - - -- Configuration pragmas - - when 'c' => - Ptr := Ptr + 1; - - if Ptr > Max then - raise Bad_Switch; - end if; - - Config_File_Name := - new String'(Switch_Chars (Ptr .. Max)); - - return; - - -- Mapping file - - when 'm' => - Ptr := Ptr + 1; - - if Ptr > Max then - raise Bad_Switch; - end if; - - Mapping_File_Name := - new String'(Switch_Chars (Ptr .. Max)); - return; - - when others => - raise Bad_Switch; - end case; - - -- Processing for E switch - - when 'E' => - Ptr := Ptr + 1; - Dynamic_Elaboration_Checks := True; - - -- Processing for f switch - - when 'f' => - Ptr := Ptr + 1; - All_Errors_Mode := True; - - -- Processing for F switch - - when 'F' => - Ptr := Ptr + 1; - External_Name_Exp_Casing := Uppercase; - External_Name_Imp_Casing := Uppercase; - - -- Processing for g switch - - when 'g' => - Ptr := Ptr + 1; - GNAT_Mode := True; - Identifier_Character_Set := 'n'; - Warning_Mode := Treat_As_Error; - Check_Unreferenced := True; - Check_Withs := True; - - Set_Default_Style_Check_Options; - - -- Processing for G switch - - when 'G' => - Ptr := Ptr + 1; - Print_Generated_Code := True; - - -- Processing for h switch - - when 'h' => - Ptr := Ptr + 1; - Usage_Requested := True; - - -- Processing for H switch - - when 'H' => - Ptr := Ptr + 1; - HLO_Active := True; - - -- Processing for i switch - - when 'i' => - if Ptr = Max then - raise Bad_Switch; - end if; - - Ptr := Ptr + 1; - C := Switch_Chars (Ptr); - - if C in '1' .. '5' - or else C = '8' - or else C = 'p' - or else C = 'f' - or else C = 'n' - or else C = 'w' - then - Identifier_Character_Set := C; - Ptr := Ptr + 1; - - else - raise Bad_Switch; - end if; - - -- Processing for k switch - - when 'k' => - Ptr := Ptr + 1; - Scan_Pos (Switch_Chars, Max, Ptr, Maximum_File_Name_Length); - - -- Processing for l switch - - when 'l' => - Ptr := Ptr + 1; - Full_List := True; - - -- Processing for L switch - - when 'L' => - Ptr := Ptr + 1; - Zero_Cost_Exceptions_Set := True; - Zero_Cost_Exceptions_Val := False; - - -- Processing for m switch - - when 'm' => - Ptr := Ptr + 1; - Scan_Pos (Switch_Chars, Max, Ptr, Maximum_Errors); - - -- Processing for n switch - - when 'n' => - Ptr := Ptr + 1; - Inline_Active := True; - - -- Processing for N switch - - when 'N' => - Ptr := Ptr + 1; - Inline_Active := True; - Front_End_Inlining := True; - - -- Processing for o switch - - when 'o' => - Ptr := Ptr + 1; - Suppress_Options.Overflow_Checks := False; - - -- Processing for O switch - - when 'O' => - Ptr := Ptr + 1; - Output_File_Name_Present := True; - - -- Processing for p switch - - when 'p' => - Ptr := Ptr + 1; - Suppress_Options.Access_Checks := True; - Suppress_Options.Accessibility_Checks := True; - Suppress_Options.Discriminant_Checks := True; - Suppress_Options.Division_Checks := True; - Suppress_Options.Elaboration_Checks := True; - Suppress_Options.Index_Checks := True; - Suppress_Options.Length_Checks := True; - Suppress_Options.Overflow_Checks := True; - Suppress_Options.Range_Checks := True; - Suppress_Options.Division_Checks := True; - Suppress_Options.Length_Checks := True; - Suppress_Options.Range_Checks := True; - Suppress_Options.Storage_Checks := True; - Suppress_Options.Tag_Checks := True; - - Validity_Checks_On := False; - - -- Processing for P switch - - when 'P' => - Ptr := Ptr + 1; - Polling_Required := True; - - -- Processing for q switch - - when 'q' => - Ptr := Ptr + 1; - Try_Semantics := True; - - -- Processing for q switch - - when 'Q' => - Ptr := Ptr + 1; - Force_ALI_Tree_File := True; - Try_Semantics := True; - - -- Processing for r switch - - when 'r' => - Ptr := Ptr + 1; - - -- Temporarily allow -gnatr to mean -gnatyl (use RM layout) - -- for compatibility with pre 3.12 versions of GNAT, - -- to be removed for 3.13 ??? - - Set_Style_Check_Options ("l"); - - -- Processing for R switch - - when 'R' => - Ptr := Ptr + 1; - Back_Annotate_Rep_Info := True; - - if Ptr <= Max - and then Switch_Chars (Ptr) in '0' .. '9' - then - C := Switch_Chars (Ptr); - - if C in '4' .. '9' then - raise Bad_Switch; - else - List_Representation_Info := - Character'Pos (C) - Character'Pos ('0'); - Ptr := Ptr + 1; - end if; - - else - List_Representation_Info := 1; - end if; - - -- Processing for s switch - - when 's' => - Ptr := Ptr + 1; - Operating_Mode := Check_Syntax; - - -- Processing for t switch - - when 't' => - Ptr := Ptr + 1; - Tree_Output := True; - Back_Annotate_Rep_Info := True; - - -- Processing for T switch - - when 'T' => - Ptr := Ptr + 1; - Time_Slice_Set := True; - Scan_Nat (Switch_Chars, Max, Ptr, Time_Slice_Value); - - -- Processing for u switch - - when 'u' => - Ptr := Ptr + 1; - List_Units := True; - - -- Processing for U switch - - when 'U' => - Ptr := Ptr + 1; - Unique_Error_Tag := True; - - -- Processing for v switch - - when 'v' => - Ptr := Ptr + 1; - Verbose_Mode := True; - - -- Processing for V switch - - when 'V' => - Ptr := Ptr + 1; - - if Ptr > Max then - raise Bad_Switch; - - else - declare - OK : Boolean; - - begin - Set_Validity_Check_Options - (Switch_Chars (Ptr .. Max), OK, Ptr); - - if not OK then - raise Bad_Switch; - end if; - end; - end if; - - -- Processing for w switch - - when 'w' => - Ptr := Ptr + 1; - - if Ptr > Max then - raise Bad_Switch; - end if; - - while Ptr <= Max loop - C := Switch_Chars (Ptr); - - case C is - - when 'a' => - Constant_Condition_Warnings := True; - Elab_Warnings := True; - Check_Unreferenced := True; - Check_Withs := True; - Implementation_Unit_Warnings := True; - Ineffective_Inline_Warnings := True; - Warn_On_Redundant_Constructs := True; - - when 'A' => - Constant_Condition_Warnings := False; - Elab_Warnings := False; - Check_Unreferenced := False; - Check_Withs := False; - Implementation_Unit_Warnings := False; - Warn_On_Biased_Rounding := False; - Warn_On_Hiding := False; - Warn_On_Redundant_Constructs := False; - Ineffective_Inline_Warnings := False; - - when 'c' => - Constant_Condition_Warnings := True; - - when 'C' => - Constant_Condition_Warnings := False; - - when 'b' => - Warn_On_Biased_Rounding := True; - - when 'B' => - Warn_On_Biased_Rounding := False; - - when 'e' => - Warning_Mode := Treat_As_Error; - - when 'h' => - Warn_On_Hiding := True; - - when 'H' => - Warn_On_Hiding := False; - - when 'i' => - Implementation_Unit_Warnings := True; - - when 'I' => - Implementation_Unit_Warnings := False; - - when 'l' => - Elab_Warnings := True; - - when 'L' => - Elab_Warnings := False; - - when 'o' => - Address_Clause_Overlay_Warnings := True; - - when 'O' => - Address_Clause_Overlay_Warnings := False; - - when 'p' => - Ineffective_Inline_Warnings := True; - - when 'P' => - Ineffective_Inline_Warnings := False; - - when 'r' => - Warn_On_Redundant_Constructs := True; - - when 'R' => - Warn_On_Redundant_Constructs := False; - - when 's' => - Warning_Mode := Suppress; - - when 'u' => - Check_Unreferenced := True; - Check_Withs := True; - - when 'U' => - Check_Unreferenced := False; - Check_Withs := False; - - -- Allow and ignore 'w' so that the old - -- format (e.g. -gnatwuwl) will work. - - when 'w' => - null; - - when others => - raise Bad_Switch; - end case; - - Ptr := Ptr + 1; - end loop; - - return; - - -- Processing for W switch - - when 'W' => - Ptr := Ptr + 1; - - for J in WC_Encoding_Method loop - if Switch_Chars (Ptr) = WC_Encoding_Letters (J) then - Wide_Character_Encoding_Method := J; - exit; - - elsif J = WC_Encoding_Method'Last then - raise Bad_Switch; - end if; - end loop; - - Upper_Half_Encoding := - Wide_Character_Encoding_Method in - WC_Upper_Half_Encoding_Method; - - Ptr := Ptr + 1; - - -- Processing for x switch - - when 'x' => - Ptr := Ptr + 1; - Xref_Active := False; - - -- Processing for X switch - - when 'X' => - Ptr := Ptr + 1; - Extensions_Allowed := True; - - -- Processing for y switch - - when 'y' => - Ptr := Ptr + 1; - - if Ptr > Max then - Set_Default_Style_Check_Options; - - else - declare - OK : Boolean; - - begin - Set_Style_Check_Options - (Switch_Chars (Ptr .. Max), OK, Ptr); - - if not OK then - raise Bad_Switch; - end if; - end; - end if; - - -- Processing for z switch - - when 'z' => - Ptr := Ptr + 1; - - -- Allowed for compiler, only if this is the only - -- -z switch, we do not allow multiple occurrences - - if Distribution_Stub_Mode = No_Stubs then - case Switch_Chars (Ptr) is - when 'r' => - Distribution_Stub_Mode := Generate_Receiver_Stub_Body; - - when 'c' => - Distribution_Stub_Mode := Generate_Caller_Stub_Body; - - when others => - raise Bad_Switch; - end case; - - Ptr := Ptr + 1; - - end if; - - -- Processing for Z switch - - when 'Z' => - Ptr := Ptr + 1; - Zero_Cost_Exceptions_Set := True; - Zero_Cost_Exceptions_Val := True; - - -- Processing for 83 switch - - when '8' => - - if Ptr = Max then - raise Bad_Switch; - end if; - - Ptr := Ptr + 1; - - if Switch_Chars (Ptr) /= '3' then - raise Bad_Switch; - else - Ptr := Ptr + 1; - Ada_95 := False; - Ada_83 := True; - end if; - - -- Ignore extra switch character - - when '/' | '-' => - Ptr := Ptr + 1; - - -- Anything else is an error (illegal switch character) - - when others => - raise Bad_Switch; - end case; - end case; - end loop; - - exception - when Bad_Switch => - Osint.Fail ("invalid switch: ", (1 => C)); - - when Bad_Switch_Value => - Osint.Fail ("numeric value too big for switch: ", (1 => C)); - - when Missing_Switch_Value => - Osint.Fail ("missing numeric value for switch: ", (1 => C)); - - end Scan_Front_End_Switches; - - ------------------------ - -- Scan_Make_Switches -- ------------------------ - - procedure Scan_Make_Switches (Switch_Chars : String) is - Ptr : Integer := Switch_Chars'First; - Max : Integer := Switch_Chars'Last; - C : Character := ' '; - - begin - -- Skip past the initial character (must be the switch character) - - if Ptr = Max then - raise Bad_Switch; - - else - Ptr := Ptr + 1; - end if; - - -- A little check, "gnat" at the start of a switch is not allowed - -- except for the compiler (where it was already removed) - - if Switch_Chars'Length >= Ptr + 3 - and then Switch_Chars (Ptr .. Ptr + 3) = "gnat" - then - Osint.Fail - ("invalid switch: """, Switch_Chars, """ (gnat not needed here)"); - end if; - - -- Loop to scan through switches given in switch string - - while Ptr <= Max loop - C := Switch_Chars (Ptr); - - -- Processing for a switch - - case C is - - when 'a' => - Ptr := Ptr + 1; - Check_Readonly_Files := True; - - -- Processing for b switch - - when 'b' => - Ptr := Ptr + 1; - Bind_Only := True; - - -- Processing for c switch - - when 'c' => - Ptr := Ptr + 1; - Compile_Only := True; - - when 'd' => - - -- Note: for the debug switch, the remaining characters in this - -- switch field must all be debug flags, since all valid switch - -- characters are also valid debug characters. - - -- Loop to scan out debug flags - - while Ptr < Max loop - Ptr := Ptr + 1; - C := Switch_Chars (Ptr); - exit when C = ASCII.NUL or else C = '/' or else C = '-'; - - if C in '1' .. '9' or else - C in 'a' .. 'z' or else - C in 'A' .. 'Z' - then - Set_Debug_Flag (C); - else - raise Bad_Switch; - end if; - end loop; - - -- Make sure Zero_Cost_Exceptions is set if gnatdX set. This - -- is for backwards compatibility with old versions and usage. - - if Debug_Flag_XX then - Zero_Cost_Exceptions_Set := True; - Zero_Cost_Exceptions_Val := True; - end if; - - return; - - -- Processing for f switch - - when 'f' => - Ptr := Ptr + 1; - Force_Compilations := True; - - -- Processing for G switch - - when 'G' => - Ptr := Ptr + 1; - Print_Generated_Code := True; - - -- Processing for h switch - - when 'h' => - Ptr := Ptr + 1; - Usage_Requested := True; - - -- Processing for i switch - - when 'i' => - Ptr := Ptr + 1; - In_Place_Mode := True; - - -- Processing for j switch - - when 'j' => - Ptr := Ptr + 1; - - declare - Max_Proc : Pos; - begin - Scan_Pos (Switch_Chars, Max, Ptr, Max_Proc); - Maximum_Processes := Positive (Max_Proc); - end; - - -- Processing for k switch - - when 'k' => - Ptr := Ptr + 1; - Keep_Going := True; - - -- Processing for l switch - - when 'l' => - Ptr := Ptr + 1; - Link_Only := True; - - when 'M' => - Ptr := Ptr + 1; - List_Dependencies := True; - - -- Processing for n switch - - when 'n' => - Ptr := Ptr + 1; - Do_Not_Execute := True; - - -- Processing for o switch - - when 'o' => - Ptr := Ptr + 1; - - if Output_File_Name_Present then - raise Too_Many_Output_Files; - else - Output_File_Name_Present := True; - end if; - - -- Processing for q switch - - when 'q' => - Ptr := Ptr + 1; - Quiet_Output := True; - - -- Processing for s switch - - when 's' => - Ptr := Ptr + 1; - Check_Switches := True; - - -- Processing for v switch - - when 'v' => - Ptr := Ptr + 1; - Verbose_Mode := True; - - -- Processing for z switch - - when 'z' => - Ptr := Ptr + 1; - No_Main_Subprogram := True; - - -- Ignore extra switch character - - when '/' | '-' => - Ptr := Ptr + 1; - - -- Anything else is an error (illegal switch character) - - when others => - raise Bad_Switch; - - end case; - end loop; - - exception - when Bad_Switch => - Osint.Fail ("invalid switch: ", (1 => C)); - - when Bad_Switch_Value => - Osint.Fail ("numeric value too big for switch: ", (1 => C)); - - when Missing_Switch_Value => - Osint.Fail ("missing numeric value for switch: ", (1 => C)); - - when Too_Many_Output_Files => - Osint.Fail ("duplicate -o switch"); - - end Scan_Make_Switches; - -------------- -- Scan_Nat -- -------------- @@ -1350,9 +64,11 @@ package body Switch is (Switch_Chars : String; Max : Integer; Ptr : in out Integer; - Result : out Nat) is + Result : out Nat) + is begin Result := 0; + if Ptr > Max or else Switch_Chars (Ptr) not in '0' .. '9' then raise Missing_Switch_Value; end if; @@ -1380,6 +96,7 @@ package body Switch is begin Scan_Nat (Switch_Chars, Max, Ptr, Result); + if Result = 0 then raise Bad_Switch_Value; end if; |
