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- TTTTccccllll____SSSSeeeettttVVVVaaaarrrr((((3333TTTTccccllll)))) TTTTccccllll____SSSSeeeettttVVVVaaaarrrr((((3333TTTTccccllll))))
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- NNNNAAAAMMMMEEEE
- Tcl_SetVar, Tcl_SetVar2, Tcl_GetVar, Tcl_GetVar2, Tcl_UnsetVar,
- Tcl_UnsetVar2 - manipulate Tcl variables
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- SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
- ####iiiinnnncccclllluuuuddddeeee <<<<ttttccccllll....hhhh>>>>
-
- char *
- TTTTccccllll____SSSSeeeettttVVVVaaaarrrr(_i_n_t_e_r_p, _v_a_r_N_a_m_e, _n_e_w_V_a_l_u_e, _f_l_a_g_s)
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- char *
- TTTTccccllll____SSSSeeeettttVVVVaaaarrrr2222(_i_n_t_e_r_p, _n_a_m_e_1, _n_a_m_e_2, _n_e_w_V_a_l_u_e, _f_l_a_g_s)
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- char *
- TTTTccccllll____GGGGeeeettttVVVVaaaarrrr(_i_n_t_e_r_p, _v_a_r_N_a_m_e, _f_l_a_g_s)
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- char *
- TTTTccccllll____GGGGeeeettttVVVVaaaarrrr2222(_i_n_t_e_r_p, _n_a_m_e_1, _n_a_m_e_2, _f_l_a_g_s)
-
- int
- TTTTccccllll____UUUUnnnnsssseeeettttVVVVaaaarrrr(_i_n_t_e_r_p, _v_a_r_N_a_m_e, _f_l_a_g_s)
-
- int
- TTTTccccllll____UUUUnnnnsssseeeettttVVVVaaaarrrr2222(_i_n_t_e_r_p, _n_a_m_e_1, _n_a_m_e_2, _f_l_a_g_s)
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- AAAARRRRGGGGUUUUMMMMEEEENNNNTTTTSSSS
- Tcl_Interp *_i_n_t_e_r_p (in) Interpreter containing variable.
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- char *_v_a_r_N_a_m_e (in) Name of variable. May refer to a
- scalar variable or an element of an
- array variable. If the name |
- references an element of an array, |
- then it must be in writable memory: |
- Tcl will make temporary modifications |
- to it while looking up the name.
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- char *_n_e_w_V_a_l_u_e (in) New value for variable.
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- int _f_l_a_g_s (in) OR-ed combination of bits providing
- additional information for operation.
- See below for valid values.
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- char *_n_a_m_e_1 (in) Name of scalar variable, or name of
- array variable if _n_a_m_e_2 is non-NULL.
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- char *_n_a_m_e_2 (in) If non-NULL, gives name of element
- within array and _n_a_m_e_1 must refer to
- an array variable.
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- PPPPaaaaggggeeee 1111
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- TTTTccccllll____SSSSeeeettttVVVVaaaarrrr((((3333TTTTccccllll)))) TTTTccccllll____SSSSeeeettttVVVVaaaarrrr((((3333TTTTccccllll))))
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- DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
- These procedures may be used to create, modify, read, and delete Tcl
- variables from C code. TTTTccccllll____SSSSeeeettttVVVVaaaarrrr and TTTTccccllll____SSSSeeeettttVVVVaaaarrrr2222 will create a new
- variable or modify an existing one. Both of these procedures set the
- given variable to the value given by _n_e_w_V_a_l_u_e, and they return a pointer
- to a copy of the variable's new value, which is stored in Tcl's variable
- structure. Tcl keeps a private copy of the variable's value, so the
- caller may change _n_e_w_V_a_l_u_e after these procedures return without
- affecting the value of the variable. If an error occurs in setting the
- variable (e.g. an array variable is referenced without giving an index
- into the array), then NULL is returned.
-
- The name of the variable may be specified in either of two ways. If
- TTTTccccllll____SSSSeeeettttVVVVaaaarrrr is called, the variable name is given as a single string,
- _v_a_r_N_a_m_e. If _v_a_r_N_a_m_e contains an open parenthesis and ends with a close
- parenthesis, then the value between the parentheses is treated as an
- index (which can have any string value) and the characters before the
- first open parenthesis are treated as the name of an array variable. If
- _v_a_r_N_a_m_e doesn't have parentheses as described above, then the entire
- string is treated as the name of a scalar variable. If TTTTccccllll____SSSSeeeettttVVVVaaaarrrr2222 is
- called, then the array name and index have been separated by the caller
- into two separate strings, _n_a_m_e_1 and _n_a_m_e_2 respectively; if _n_a_m_e_2 is
- zero it means that a scalar variable is being referenced.
-
- The _f_l_a_g_s argument may be used to specify any of several options to the
- procedures. It consists of an OR-ed combination of any of the following
- bits:
-
- TCL_GLOBAL_ONLY
- Under normal circumstances the procedures look up variables at the
- current level of procedure call for _i_n_t_e_r_p, or at global level if
- there is no call active. However, if this bit is set in _f_l_a_g_s then
- the variable is looked up at global level even if there is a
- procedure call active.
-
- TCL_LEAVE_ERR_MSG
- If an error is returned and this bit is set in _f_l_a_g_s, then an error
- message will be left in _i_n_t_e_r_p->_r_e_s_u_l_t. If this flag bit isn't set
- then no error message is left (_i_n_t_e_r_p->_r_e_s_u_l_t will not be modified).
-
- TCL_APPEND_VALUE
- If this bit is set then _n_e_w_V_a_l_u_e is appended to the current value,
- instead of replacing it. If the variable is currently undefined,
- then this bit is ignored.
-
- TCL_LIST_ELEMENT
- If this bit is set, then _n_e_w_V_a_l_u_e is converted to a valid Tcl list
- element before setting (or appending to) the variable. A separator
- space is appended before the new list element unless the list |
- element is going to be the first element in a list or sublist (i.e. |
- the variable's current value is empty, or contains the single |
- character ``{'', or ends in `` }'').
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- PPPPaaaaggggeeee 2222
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- TTTTccccllll____SSSSeeeettttVVVVaaaarrrr((((3333TTTTccccllll)))) TTTTccccllll____SSSSeeeettttVVVVaaaarrrr((((3333TTTTccccllll))))
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-
-
- TTTTccccllll____GGGGeeeettttVVVVaaaarrrr and TTTTccccllll____GGGGeeeettttVVVVaaaarrrr2222 return the current value of a variable. The
- arguments to these procedures are treated in the same way as the
- arguments to TTTTccccllll____SSSSeeeettttVVVVaaaarrrr and TTTTccccllll____SSSSeeeettttVVVVaaaarrrr2222. Under normal circumstances, the
- return value is a pointer to the variable's value (which is stored in
- Tcl's variable structure and will not change before the next call to
- TTTTccccllll____SSSSeeeettttVVVVaaaarrrr or TTTTccccllll____SSSSeeeettttVVVVaaaarrrr2222). The only bits of _f_l_a_g_s that are used are
- TCL_GLOBAL_ONLY and TCL_LEAVE_ERR_MSG, both of which have the same
- meaning as for TTTTccccllll____SSSSeeeettttVVVVaaaarrrr. If an error occurs in reading the variable
- (e.g. the variable doesn't exist or an array element is specified for a
- scalar variable), then NULL is returned.
-
- TTTTccccllll____UUUUnnnnsssseeeettttVVVVaaaarrrr and TTTTccccllll____UUUUnnnnsssseeeettttVVVVaaaarrrr2222 may be used to remove a variable, so that
- future calls to TTTTccccllll____GGGGeeeettttVVVVaaaarrrr or TTTTccccllll____GGGGeeeettttVVVVaaaarrrr2222 for the variable will return an
- error. The arguments to these procedures are treated in the same way as
- the arguments to TTTTccccllll____GGGGeeeettttVVVVaaaarrrr and TTTTccccllll____GGGGeeeettttVVVVaaaarrrr2222. If the variable is |
- successfully removed then TCL_OK is returned. If the variable cannot be |
- removed because it doesn't exist then TCL_ERROR is returned. If an array
- element is specified, the given element is removed but the array remains.
- If an array name is specified without an index, then the entire array is
- removed.
-
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- SSSSEEEEEEEE AAAALLLLSSSSOOOO
- Tcl_TraceVar
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- KKKKEEEEYYYYWWWWOOOORRRRDDDDSSSS
- array, interpreter, scalar, set, unset, variable
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- PPPPaaaaggggeeee 3333
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