自学教程：C++ vStringNew函数代码示例

static void findVimTags (void){	vString *name = vStringNew ();	const unsigned char *line;	boolean inFunction = FALSE;	int scope;	while ((line = fileReadLine ()) != NULL)	{		while (isspace ((int) *line))			++line;		if ((int) *line == '"')			continue;  /* skip comment */		if (strncmp ((const char*) line, "fu", (size_t) 2) == 0)		{			const unsigned char *cp = line + 1;			inFunction = TRUE;			if ((int) *++cp == 'n'  &&  (int) *++cp == 'c'  &&				(int) *++cp == 't'  &&  (int) *++cp == 'i'  &&				(int) *++cp == 'o'  &&  (int) *++cp == 'n')					++cp;			if ((int) *cp == '!')				++cp;			if (isspace ((int) *cp))			{				while (isspace ((int) *cp))					++cp;				cp = skipPrefix (cp, &scope);				if (isupper ((int) *cp)  ||  scope == 's'  ||  scope == '<')				{					do					{						vStringPut (name, (int) *cp);						++cp;					} while (isalnum ((int) *cp)  ||  *cp == '_');					vStringTerminate (name);					makeSimpleTag (name, VimKinds, K_FUNCTION);					vStringClear (name);				}			}		}	    if  (strncmp ((const char*) line, "aug", (size_t) 3) == 0)		{			/* Found Autocommand Group (augroup) */			const unsigned char *cp = line + 2;			if ((int) *++cp == 'r' && (int) *++cp == 'o' &&				(int) *++cp == 'u' && (int) *++cp == 'p')					++cp;			if (isspace ((int) *cp))			{				while (isspace ((int) *cp))					++cp; 				if (strncasecmp ((const char*) cp, "end", (size_t) 3) != 0)				{    					do					{						vStringPut (name, (int) *cp);						++cp;					} while (isalnum ((int) *cp)  ||  *cp == '_');					vStringTerminate (name);					makeSimpleTag (name, VimKinds, K_AUGROUP);					vStringClear (name);				}			}		}		if (strncmp ((const char*) line, "endf", (size_t) 4) == 0)			inFunction = FALSE;		if (!inFunction  &&				strncmp ((const char*) line, "let", (size_t) 3) == 0)		{			/* we've found a variable declared outside of a function!! */			const unsigned char *cp = line + 3;			/* get the name */			if (isspace ((int) *cp))			{				/* deal with spaces, $, @ and & */				while (!isalnum ((int) *cp))					++cp;				cp = skipPrefix (cp, &scope);				do				{					vStringPut (name, (int) *cp);					++cp;				} while (isalnum ((int) *cp)  ||  *cp == '_');				vStringTerminate (name);				makeSimpleTag (name, VimKinds, K_VARIABLE);				vStringClear (name);			}		}	}	vStringDelete (name);}

/* Algorithm adapted from from GNU etags. * Perl support by Bart Robinson <[email
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