[Anjuta-list] Symbol Name generation from file for autocomplete/calltip

[Biswapesh Chattopadhyay <biswapesh_chatterjee tcscal co in>]

Hi all

Working on a suggestion posted on the list, here is a function which takes 
any C/C++ file name as input and extracts for each symbol the symbol name, 
symbol type, file name, line number and the symbol definition. Tested on 
Linux but should work on all *nix AFAICS. Takes two arguments, the name of 
the file to analyze and the C and C++ flags to use with the pre-processor 
(basically the same as the compiler flags). You need ctags installed.

int analyzeSymbols(const char *fileName, const char *cFlags)
{
	char buf[BUFSIZ];
	char symbol[255];
	char type[20];
	char file[255];
	char line[10];
	char def[BUFSIZ];
	FILE *symbolList;
	sprintf(buf, "cpp %s -MG -MM -H %s 2>&1 | grep \"^\\.\\.* \" | awk '{print 
$2}'  | sort -u | xargs ctags --filter -x --c++-types=+px", cFlags, fileName);
	printf("%s\n", buf);
	if (NULL == (symbolList = popen(buf, "r")))
		exit(1);
	while (4 == fscanf(symbolList, "%s %s %s %s", symbol, type, file, line))
	{
		fgets(def, BUFSIZ, symbolList);
		def[strlen(def) -1] = '\0';
		printf("%s (%s at %s %s): %s\n", symbol, type, file, line, def);
	}
	fclose(symbolList);
	return 0;
}

CAVEAT: This is currently a bit slow (~ .6 secs per file - doesn't seem to 
vary too much with size), probably because it uses a lot of piped UNIX utils, 
namely, grep, sort, xargs and awk. Probably can be made much faster if 
written in plain C.

Hope this helps.
- Biswa.