diff options
| -rw-r--r-- | toys/pending/uudecode.c | 134 | ||||
| -rw-r--r-- | toys/posix/uudecode.c | 107 |
2 files changed, 107 insertions, 134 deletions
diff --git a/toys/pending/uudecode.c b/toys/pending/uudecode.c deleted file mode 100644 index 4747a036..00000000 --- a/toys/pending/uudecode.c +++ /dev/null @@ -1,134 +0,0 @@ -/* uudecode.c - uudecode / base64 decode - * - * Copyright 2013 Erich Plondke <toybox@erich.wreck.org> - * - * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/uudecode.html - -USE_UUDECODE(NEWTOY(uudecode, ">1o:", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_UMASK)) - -config UUDECODE - bool "uudecode" - default n - help - usage: uudecode [-o OUTFILE] [INFILE] - - Decode file from stdin (or INFILE). - - -o write to OUTFILE instead of filename in header -*/ - -#define FOR_uudecode -#include "toys.h" - -GLOBALS( - char *o; -) - -static int uudecode_b64_4bytes(char *out, char *in) -{ - int i, len = 3; - unsigned x = 0; - - for (i=0; i<4; i++) { - int c = in[i]; - - if (c == '=') { - len--; - c = 'A'; - } else if (len != 3) len = 0; - if (!len) goto bad; - - if (c >= 'A' && c <= 'Z') c -= 'A'; - else if (c >= 'a' && c <= 'z') c += 26 - 'a'; - else if (c >= '0' && c <= '9') c += 52 - '0'; - else if (c == '+') c = 62; - else if (c == '/') c =63; - else goto bad; - - x |= c << (6*(3-i)); - if (i && i <= len) *(out++) = (x>>(8*(3-i))) & 0xff; - } - - return len; - -bad: - error_exit("bad input"); -} - -static void uudecode_b64_line(int ofd, char *in, int ilen) -{ - int olen; - char out[4]; - - while (ilen >= 4) { - olen = uudecode_b64_4bytes(out, in); - xwrite(ofd,out,olen); - in += 4; - ilen -= 4; - }; -} - -static void uudecode_uu_4bytes(char *out, char *in, int len) -{ - unsigned int i,x=0; - - for (i = 0; i < 4; i++) x |= ((in[i] - 32) & 0x03f) << (6*(3-i)); - if (len > 3) len = 3; - for (i = 0; i < len; i++) *out++ = x >> (8*(2-i)); -} - -static void uudecode_uu_line(int ofd, char *in) -{ - int olen = (in[0] - 32) & 0x3f; - char buf[4]; - - in++; - while (olen > 0) { - uudecode_uu_4bytes(buf,in,olen); - xwrite(ofd,buf,olen < 3 ? olen : 3); - olen -= 3; - in += 4; - } -} - -void uudecode_main(void) -{ - int ifd = 0, ofd, idx = 0, m; - char *line = 0, - *class[] = {"begin%*[ ]%15s%*[ ]%n", "begin-base64%*[ ]%15s%*[ ]%n"}; - - - if (toys.optc) ifd = xopen(*toys.optargs, O_RDONLY); - - for (;;) { - char mode[16]; - - free(line); - if (!(line = get_line(ifd))) error_exit("bad EOF"); - for (m=0; m < 2; m++) { - sscanf(line, class[m], mode, &idx); - if (idx) break; - } - - if (!idx) continue; - - ofd = xcreate(TT.o ? TT.o : line+idx, O_WRONLY|O_CREAT|O_TRUNC, - string_to_mode(mode, 0777^toys.old_umask)); - free(line); - break; - } - - while ((line = get_line(ifd)) != NULL) { - if (strcmp(line, m ? "====" : "end")) { - if (m) uudecode_b64_line(ofd, line, strlen(line)); - else uudecode_uu_line(ofd, line); - } else m = 2; - free(line); - if (m == 2) break; - } - - if (CFG_TOYBOX_FREE) { - if (ifd) close(ifd); - close(ofd); - } -} diff --git a/toys/posix/uudecode.c b/toys/posix/uudecode.c new file mode 100644 index 00000000..fd557eca --- /dev/null +++ b/toys/posix/uudecode.c @@ -0,0 +1,107 @@ +/* uudecode.c - uudecode / base64 decode + * + * Copyright 2013 Erich Plondke <toybox@erich.wreck.org> + * + * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/uudecode.html + +USE_UUDECODE(NEWTOY(uudecode, ">1o:", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_UMASK)) + +config UUDECODE + bool "uudecode" + default y + help + usage: uudecode [-o OUTFILE] [INFILE] + + Decode file from stdin (or INFILE). + + -o write to OUTFILE instead of filename in header +*/ + +#define FOR_uudecode +#include "toys.h" + +GLOBALS( + char *o; +) + +void uudecode_main(void) +{ + int ifd = 0, ofd, idx = 0, m = m; + char *line = 0, mode[16], + *class[] = {"begin%*[ ]%15s%*[ ]%n", "begin-base64%*[ ]%15s%*[ ]%n"}; + + if (toys.optc) ifd = xopen(*toys.optargs, O_RDONLY); + + while (!idx) { + free(line); + if (!(line = get_line(ifd))) error_exit("bad EOF"); + for (m=0; m < 2; m++) { + sscanf(line, class[m], mode, &idx); + if (idx) break; + } + } + + ofd = xcreate(TT.o ? TT.o : line+idx, O_WRONLY|O_CREAT|O_TRUNC, + string_to_mode(mode, 0777^toys.old_umask)); + + for(;;) { + char *in, *out; + int olen; + + free(line); + if (m == 2 || !(line = get_line(ifd))) break; + if (!strcmp(line, m ? "====" : "end")) { + m = 2; + continue; + } + + olen = 0; + in = out = line; + if (!m) olen = (*(in++) - 32) & 0x3f; + + for (;;) { + int i = 0, x = 0, len = 4; + char c = 0; + + if (!m) { + if (olen < 1) break; + if (olen < 3) len = olen + 1; + } + + while (i < len) { + if (!(c = *(in++))) goto line_done; + + if (m) { + if (c == '=') { + len--; + continue; + } else if (len != 4) break; + + if (c >= 'A' && c <= 'Z') c -= 'A'; + else if (c >= 'a' && c <= 'z') c += 26 - 'a'; + else if (c >= '0' && c <= '9') c += 52 - '0'; + else if (c == '+') c = 62; + else if (c == '/') c = 63; + else continue; + } else c = (c - 32) & 0x3f; + + x |= c << (6*(3-i)); + + if (i && i < len) { + *(out++) = (x>>(8*(3-i))) & 0xff; + olen--; + } + i++; + } + + if (i && i!=len) error_exit("bad %s", line); + } +line_done: + xwrite(ofd, line, out-line); + } + + if (CFG_TOYBOX_FREE) { + if (ifd) close(ifd); + close(ofd); + } +} |