view dmd2/gnuc.c @ 1275:bedf0bfb8fdb

Implement first D-specific optimization pass: -simplify-drtcalls. It uses the machinery of the standard -simplify-libcalls pass, but optimizes calls to the D runtime instead of calls to C libraries. At the moment, these optimizations are implemented by this pass: - Avoid the runtime call for `arr.length = newlen` if it can determine that the new length isn't longer than the old one. - Ditto for `cast(T[]) arr` if it will clearly always succeed. (e.g. if the length of the original array is zero, or if the old element size is a multiple of the new element size)
author Frits van Bommel <fvbommel wxs.nl>
date Tue, 28 Apr 2009 21:58:06 +0200
parents f04dde6e882c
children
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// Put functions in here missing from gnu C

#include "gnuc.h"

int memicmp(const char *s1, const char *s2, int n)
{
    int result = 0;

    for (int i = 0; i < n; i++)
    {	char c1 = s1[i];
	char c2 = s2[i];

	result = c1 - c2;
	if (result)
	{
	    if ('A' <= c1 && c1 <= 'Z')
		c1 += 'a' - 'A';
	    if ('A' <= c2 && c2 <= 'Z')
		c2 += 'a' - 'A';
	    result = c1 - c2;
	    if (result)
		break;
	}
    }
    return result;
}

int stricmp(const char *s1, const char *s2)
{
    int result = 0;

    for (;;)
    {	char c1 = *s1;
	char c2 = *s2;

	result = c1 - c2;
	if (result)
	{
	    if ('A' <= c1 && c1 <= 'Z')
		c1 += 'a' - 'A';
	    if ('A' <= c2 && c2 <= 'Z')
		c2 += 'a' - 'A';
	    result = c1 - c2;
	    if (result)
		break;
	}
	if (!c1)
	    break;
	s1++;
	s2++;
    }
    return result;
}