17  * variable.c - handle Jam multi-element variables.
21  *  var_defines() - load a bunch of variable=value settings
23  *  var_set()     - set a variable in jam's user defined symbol table.
24  *  var_swap()    - swap a variable's value with the given one
25  *  var_done()    - free variable tables
30  *  var_dump()  - dump a variable to stdout
34 #include "variable.h"
49  * VARIABLE - a user defined multi-value variable
52 typedef struct _variable VARIABLE ;  typedef
65  * var_defines() - load a bunch of variable=value settings
69  * Otherwise, if the variable value is enclosed in quotes, strip the quotes.
70  * Otherwise, if variable name ends in PATH, split value at :'s.
156 /* Last returned variable value saved so we may clear it in var_done(). */
199         VARIABLE * v;  in var_get()
208         else if ( module->variables && ( v = (VARIABLE *)hash_find(  in var_get()
220             /* On VMS, when a variable from root or ENVIRON module is not found,  in var_get()
224              * So we get around it by getting any such variable on first request.  in var_get()
245                 /* Load variable to global module, with splitting, for backward  in var_get()
252                 if ( module->variables && ( v = (VARIABLE *)hash_find(  in var_get()
270     VARIABLE * v;  in var_get_and_clear_raw()
272     if ( module->variables && ( v = (VARIABLE *)hash_find( module->variables,  in var_get_and_clear_raw()
284  * var_set() - set a variable in Jam's user defined symbol table
286  * 'flag' controls the relationship between new and old values of the variable:
288  * only uses the new if the variable was previously unset.
323  * var_swap() - swap a variable's value with the given one
344     VARIABLE * v;  in var_enter()
351         module->variables = hashinit( sizeof( VARIABLE ), "variables" );  in var_enter()
353     v = (VARIABLE *)hash_insert( module->variables, symbol, &found );  in var_enter()
365  * var_dump() - dump a variable to stdout
377  * var_done() - free variable tables
382     VARIABLE * const v = (VARIABLE *)xvar;  in delete_var_()