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Remove dependency to CPP: support for #define macros

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This adds support for defining new macros, with or without parameters, which
when found afterwards in the text are replaced by their definition.
The complex analysis for arguments replacement is done at macro definition
time, so it is done only once and the macro expansion will be fast.
The macro-related functions have been placed in their own file because it is
quite a complex task and we do not want filesize to explode, it is always
better to keep things human-sized.
This commit is contained in:
Christophe CURIS
2012-06-23 00:25:38 +02:00
committed by Carlos R. Mafra
parent 88a82ab8df
commit aaa4517df7
4 changed files with 591 additions and 3 deletions
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29
WINGs/menuparser.h
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@@ -29,6 +29,12 @@
#define MAXLINE 1024
#define MAX_NESTED_INCLUDES 16 // To avoid infinite includes case
#define MAX_NESTED_MACROS 24 // To avoid infinite loop inside macro expansions
#define MAX_MACRO_ARG_COUNT 32 // Limited by design
typedef struct w_parser_macro WParserMacro;
typedef void WParserMacroFunction(WParserMacro *this, WMenuParser parser);
struct w_menu_parser {
WMenuParser include_file;
@@ -37,10 +43,33 @@ struct w_menu_parser {
const char *file_name;
FILE *file_handle;
int line_number;
WParserMacro *macros;
char *rd;
char line_buffer[MAXLINE];
};
struct w_parser_macro {
WParserMacro *next;
char name[64];
WParserMacroFunction *function;
int arg_count;
#ifdef DEBUG
int usage_count;
#endif
unsigned char value[MAXLINE * 4];
};
Bool menu_parser_skip_spaces_and_comments(WMenuParser parser);
void menu_parser_define_macro(WMenuParser parser);
void menu_parser_free_macros(WMenuParser parser);
WParserMacro *menu_parser_find_macro(WMenuParser parser, const char *name);
void menu_parser_expand_macro(WMenuParser parser, WParserMacro *macro,
char *write_buf, int write_buf_size);
int isnamechr(char ch); // Check if char is valid character for a macro name
#endif /* _MENUPARSER_H_INCLUDED */