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Diffstat (limited to 'tools/cpio/src/expand.c')
| -rw-r--r-- | tools/cpio/src/expand.c | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/tools/cpio/src/expand.c b/tools/cpio/src/expand.c deleted file mode 100644 index 5a5233f3e..000000000 --- a/tools/cpio/src/expand.c +++ /dev/null @@ -1,193 +0,0 @@ -/* - * cpio - copy file archives in and out - * - * Gunnar Ritter, Freiburg i. Br., Germany, April 2003. - */ -/* - * Copyright (c) 2003 Gunnar Ritter - * - * This software is provided 'as-is', without any express or implied - * warranty. In no event will the authors be held liable for any damages - * arising from the use of this software. - * - * Permission is granted to anyone to use this software for any purpose, - * including commercial applications, and to alter it and redistribute - * it freely, subject to the following restrictions: - * - * 1. The origin of this software must not be misrepresented; you must not - * claim that you wrote the original software. If you use this software - * in a product, an acknowledgment in the product documentation would be - * appreciated but is not required. - * - * 2. Altered source versions must be plainly marked as such, and must not be - * misrepresented as being the original software. - * - * 3. This notice may not be removed or altered from any source distribution. - */ - -/* Sccsid @(#)expand.c 1.6 (gritter) 12/15/03 */ - -#include <sys/types.h> -#include <sys/stat.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> - -#include "cpio.h" - -#define DLE 144 - -static void -zexread(char *data, size_t size, int doswap) -{ - if (bread(data, size) != size) - unexeoa(); - if (doswap) - swap(data, size, bflag || sflag, bflag || Sflag); -} - -#define nextbyte() ( \ - ipos >= sizeof ibuf && isize > 0 ? ( \ - zexread(ibuf, isize>sizeof ibuf?sizeof ibuf:isize, doswap), \ - ipos = 0 \ - ) : 0, \ - isize--, \ - ibuf[ipos++] & 0377 \ -) - -#define nextbit() ( \ - ibit = ibit >= 7 ? (ibyte = nextbyte(), 0) : ibit + 1, \ - isize < 0 ? (ieof = 1, -1) : (ibyte & (1<<ibit)) >> ibit \ -) - -#define sixbits(n) { \ - int t; \ - (n) = 0; \ - for (t = 0; t < 6; t++) \ - (n) |= nextbit() << t; \ -} - -#define eightbits(n) { \ - int t; \ - (n) = 0; \ - for (t = 0; t < 8; t++) \ - (n) |= nextbit() << t; \ -} - -static void -zexwrite(int *tfd, char *data, size_t size, uint32_t *crc, int *val, - const char *tgt, long long *nsize) -{ - if (size) { - if (size > *nsize) - size = *nsize; - if (*tfd >= 0 && write(*tfd, data, size) != size) { - emsg(3, "Cannot write \"%s\"", tgt); - *tfd = -1; - *val = -1; - } - *crc = zipcrc(*crc, (unsigned char *)data, size); - *nsize -= size; - } -} - -#define wadd(c) ( \ - wpos >= sizeof wbuf ? ( \ - zexwrite(&tfd, wbuf, sizeof wbuf, crc, &val, tgt, &nsize), \ - wpos = 0 \ - ) : 0, \ - wsize++, \ - wbuf[wpos++] = (c) \ -) - -#define zex_L(x) ( \ - f->f_cmethod == C_REDUCED1 ? (x) & 0177 : \ - f->f_cmethod == C_REDUCED2 ? (x) & 077 : \ - f->f_cmethod == C_REDUCED3 ? (x) & 037 : \ - /* f->f_cmethod == C_REDUCED4 */ (x) & 017 \ -) - -#define zex_F(x) ( \ - f->f_cmethod == C_REDUCED1 ? (x) == 0177 ? 2 : 3 : \ - f->f_cmethod == C_REDUCED2 ? (x) == 077 ? 2 : 3 : \ - f->f_cmethod == C_REDUCED3 ? (x) == 037 ? 2 : 3 : \ - /* f->f_cmethod == C_REDUCED4 */ (x) == 017 ? 2 : 3 \ -) - -#define zex_D(x, y) ( \ - f->f_cmethod == C_REDUCED1 ? (((x)&0200)>>7) * 0400 + (y) + 1 : \ - f->f_cmethod == C_REDUCED2 ? (((x)&0300)>>6) * 0400 + (y) + 1 : \ - f->f_cmethod == C_REDUCED3 ? (((x)&0340)>>5) * 0400 + (y) + 1 : \ - /* f->f_cmethod == C_REDUCED4 */ (((x)&0360)>>4) * 0400 + (y) + 1 \ -) - -int -zipexpand(struct file *f, const char *tgt, int tfd, int doswap, uint32_t *crc) -{ - char fset[256][33]; - char ibuf[4096], ibyte = 0, wbuf[8192]; - long ipos = sizeof ibuf, wpos = 0, isize = f->f_csize, wsize = 0; - int val = 0, ieof = 0; - int c = 0, i, j, k, n, ibit = 7, lastc, state, v = 0, len = 0; - long long nsize = f->f_st.st_size; - - *crc = 0; - memset(fset, 0, sizeof fset); - for (j = 255; j >= 0; j--) { - sixbits(n); - for (i = 0; i < n; i++) { - eightbits(fset[j][i]); - } - fset[j][32] = n<1?0:n<3?1:n<5?2:n<9?3:n<17?4:n<37?5:n<65?6:7; - } - lastc = 0; - state = 0; - while (ieof == 0) { - if (fset[lastc][32] == 0) { - eightbits(c); - } else { - if (nextbit() != 0) { - eightbits(c); - } else { - i = 0; - for (k = 0; k < fset[lastc][32]; k++) - i |= nextbit() << k; - c = fset[lastc][i] & 0377; - } - } - lastc = c; - switch (state) { - case 0: - if (c != DLE) - wadd(c); - else - state = 1; - break; - case 1: - if (c != 0) { - v = c; - len = zex_L(v); - state = zex_F(len); - } else { - wadd(DLE); - state = 0; - } - break; - case 2: - len += c; - state = 3; - break; - case 3: - n = wsize - zex_D(v, c); - for (i = 0; i < len + 3; i++) { - c = n+i >= 0 ? wbuf[n+i&sizeof wbuf-1]&0377 : 0; - wadd(c); - } - state = 0; - } - } - zexwrite(&tfd, wbuf, wpos, crc, &val, tgt, &nsize); - while (isize >= 0) - nextbyte(); - return val; -} |