diff options
Diffstat (limited to 'src/interfaces/ecpg/preproc/type.h')
| -rw-r--r-- | src/interfaces/ecpg/preproc/type.h | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/src/interfaces/ecpg/preproc/type.h b/src/interfaces/ecpg/preproc/type.h index 08b739e..a36d93d 100644 --- a/src/interfaces/ecpg/preproc/type.h +++ b/src/interfaces/ecpg/preproc/type.h @@ -158,13 +158,25 @@ struct typedefs struct typedefs *next; }; +/* + * Info about a defined symbol (macro), coming from a -D command line switch + * or a define command in the program. These are stored in a simple list. + * Because ecpg supports compiling multiple files per run, we have to remember + * the command-line definitions and be able to revert to those; this motivates + * storing cmdvalue separately from value. + * name and value are separately-malloc'd strings; cmdvalue typically isn't. + * used is NULL unless we are currently expanding the macro, in which case + * it points to the buffer before the one scanning the macro; we reset it + * to NULL upon returning to that buffer. This is used to prevent recursive + * expansion of the macro. + */ struct _defines { - char *olddef; - char *newdef; - int pertinent; - void *used; - struct _defines *next; + char *name; /* symbol's name */ + char *value; /* current value, or NULL if undefined */ + const char *cmdvalue; /* value set on command line, or NULL */ + void *used; /* buffer pointer, or NULL */ + struct _defines *next; /* list link */ }; /* This is a linked list of the variable names and types. */ |