如何更改Homebrew安装包的位置？这甚至可能吗？我尝试在#include <stdio.h>
#include <stdlib.h>
typedef unsigned OUTCODE;
typedef int COORD;
typedef int BOOL;
#define TRUE 1
#define FALSE 0
#define XMIN 0
#define YMIN 0
#define XMAX 5000
#define YMAX 3000
// Not strictly portable, but usually fine.
#define SIGN_BIT (~(~0u >> 1))
#define LEFT SIGN_BIT
#define TOP (LEFT >> 1)
#define RIGHT (TOP >> 1)
#define BOTTOM (RIGHT >> 1)
#define ALL (LEFT | BOTTOM | RIGHT | TOP)
// Mask the sign bit.
#define M(X) ((X) & SIGN_BIT)
// Shift previous value and mask in the new sign bit.
#define SM(Prev, New) (((OUTCODE)(Prev) >> 1) | M(New))
__inline OUTCODE outcode(COORD x, COORD y) {
return SM(SM(SM(M(YMAX - y), XMAX - x), y - YMIN), x - XMIN);
}
// In the S-T coordinate system, pO is outside boundary C and will be moved
// to the boundary while pI doesn't move. I is the termination correction.
#define MOVE_TO_BOUNDARY(SO, TO, SI, TI, C, I, IS_OUTSIDE) do { \
COORD tsi = SI, tti = TI; \
while (SO IS_OUTSIDE C) { \
COORD sm = (tsi + SO + I) >> 1; \
COORD tm = (tti + TO + I) >> 1; \
if (sm IS_OUTSIDE ## = C) { \
SO = sm; \
TO = tm; \
} else { \
tsi = sm; \
tti = tm; \
} \
} \
} while (0)
BOOL clip(COORD *x0p, COORD *y0p, COORD *x1p, COORD *y1p) {
COORD x0 = *x0p, y0 = *y0p, x1 = *x1p, y1 = *y1p;
OUTCODE code0 = outcode(x0, y0);
OUTCODE code1 = outcode(x1, y1);
for (;;) {
if ((code0 | code1) == 0) {
*x0p = x0; *y0p = y0; *x1p = x1; *y1p = y1;
return TRUE;
} else if (code0 & code1) {
return FALSE;
} else if (code0) {
if (code0 & BOTTOM) MOVE_TO_BOUNDARY(y0, x0, y1, x1, YMAX, 0, >);
else if (code0 & RIGHT) MOVE_TO_BOUNDARY(x0, y0, x1, y1, XMAX, 0, >);
else if (code0 & TOP) MOVE_TO_BOUNDARY(y0, x0, y1, x1, YMIN, 1, <);
else /* LEFT */ MOVE_TO_BOUNDARY(x0, y0, x1, y1, XMIN, 1, <);
code0 = outcode(x0, y0);
} else {
if (code1 & BOTTOM) MOVE_TO_BOUNDARY(y1, x1, y0, x0, YMAX, 0, >);
else if (code1 & RIGHT) MOVE_TO_BOUNDARY(x1, y1, x0, y0, XMAX, 0, >);
else if (code1 & TOP) MOVE_TO_BOUNDARY(y1, x1, y0, x0, YMIN, 1, <);
else /* LEFT */ MOVE_TO_BOUNDARY(x1, y1, x0, y0, XMIN, 1, <);
code1 = outcode(x1, y1);
}
}
}
int main(void) {
int n = 0, margin = 2000;
for (;;) {
// Generate some random points around the viewport.
int x0 = rand() % (2 * margin + XMAX - XMIN) - margin;
int y0 = rand() % (2 * margin + YMAX - YMIN) - margin;
int x1 = rand() % (2 * margin + XMAX - XMIN) - margin;
int y1 = rand() % (2 * margin + YMAX - YMIN) - margin;
printf("a(%d, %d)--(%d, %d) %x--%x\n", x0, y0, x1, y1,
outcode(x0,y0) >> 28, outcode(x1,y1) >> 28);
BOOL r = clip(&x0, &y0, &x1, &y1);
printf("a(%d, %d)--(%d, %d): %d\n", x0, y0, x1, y1, r);
}
return 0;
}
中手动移动已安装的文件夹，但该位置的动态链接是“硬连线”。
答案 0 :(得分：5)
不，这是不可能的。 You can change the location of the whole Homebrew install（例如~/homebrew代替/usr/local），但您无法更改一个包的位置。