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Browse - programming tips - win32 read ini file section

Date: 2008may27
Platform: win32

Q.  How do I read a section of an .ini file?

A.  This code shows how to do just that.

#include <map>

// Helper
inline int FileSize(LPCSTR file)
{
	struct stat		sb;

	if (stat(file, &sb) < 0) return -1;
	return sb.st_size;
}

// This is where the section will go
typedef std::map<CString, CString> SECT;

static BOOL GetSection(LPCSTR szFile, LPCSTR szSection, SECT &section)
{
	int		size;
	LPSTR		pBuf;
	LPSTR		p, q, next, val;

	section.clear();

	// Allocate a buffer as big as the .ini file
	if ((size = filesize(szFile)) < 0) return FALSE;
	if ((pBuf = (LPSTR)malloc(size)) == NULL) return FALSE;

	// Read the section into memory
	GetPrivateProfileSection(szSection, pBuf, size, szFile);

	for (p = pBuf; *p; p = next)
	{
		next = p + lstrlen(p) + 1;
		if ((q = strchr(p, '=')) == NULL)
		{
			q = p + lstrlen(p);
			val = q;
		}
		else
		{
			val = q + 1;
		}

		*q = '\0';
		section[p] = val;
	}

	free(pBuf);
	return TRUE;
}

// Example use
main()
{
	LPCSTR		szFile = "c:/temporary/myfile.ini";
	LPCSTR		szSection = "stuff";
	SECT		sect;

	GetSection(szFile, szSection, sect);

	for (SECT::iterator it = sect.begin(); it != sect.end(); it++)
	{
		printf("[%s]=[%s]\n", it->first, it->second);
	}
}

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