diff options
Diffstat (limited to 'tr.c')
| -rw-r--r-- | tr.c | 40 |
1 files changed, 26 insertions, 14 deletions
@@ -34,14 +34,15 @@ #define bb_need_write_error #include "messages.c" -#define ASCII 0377 +static const int ASCII = 0377; /* some glabals shared across this file */ static char com_fl, del_fl, sq_fl; -static unsigned char output[BUFSIZ], input[BUFSIZ]; -static unsigned char vector[ASCII + 1]; -static char invec[ASCII + 1], outvec[ASCII + 1]; static short in_index, out_index; +/* these last are pointers to static buffers declared in tr_main */ +static unsigned char *poutput, *pinput; +static unsigned char *pvector; +static char *pinvec, *poutvec; static void convert() @@ -52,22 +53,22 @@ static void convert() for (;;) { if (in_index == read_chars) { - if ((read_chars = read(0, (char *) input, BUFSIZ)) <= 0) { - if (write(1, (char *) output, out_index) != out_index) + if ((read_chars = read(0, (char *) pinput, BUFSIZ)) <= 0) { + if (write(1, (char *) poutput, out_index) != out_index) write(2, write_error, strlen(write_error)); exit(0); } in_index = 0; } - c = input[in_index++]; - coded = vector[c]; - if (del_fl && invec[c]) + c = pinput[in_index++]; + coded = pvector[c]; + if (del_fl && pinvec[c]) continue; - if (sq_fl && last == coded && (invec[c] || outvec[coded])) + if (sq_fl && last == coded && (pinvec[c] || poutvec[coded])) continue; - output[out_index++] = last = coded; + poutput[out_index++] = last = coded; if (out_index == BUFSIZ) { - if (write(1, (char *) output, out_index) != out_index) { + if (write(1, (char *) poutput, out_index) != out_index) { write(2, write_error, strlen(write_error)); exit(1); } @@ -86,9 +87,9 @@ static void map(register unsigned char *string1, unsigned int string1_len, for (j = 0, i = 0; i < string1_len; i++) { if (string2_len <= j) - vector[string1[i]] = last; + pvector[string1[i]] = last; else - vector[string1[i]] = last = string2[j++]; + pvector[string1[i]] = last = string2[j++]; } } @@ -143,6 +144,17 @@ extern int tr_main(int argc, char **argv) int output_length=0, input_length; int index = 1; int i; + /* set up big arrays here (better than making a bunch of static arrays up top) */ + unsigned char output[BUFSIZ], input[BUFSIZ]; + unsigned char vector[ASCII + 1]; + char invec[ASCII + 1], outvec[ASCII + 1]; + + /* ... but make them available globally */ + poutput = output; + pinput = input; + pvector = vector; + pinvec = invec; + poutvec = outvec; if (argc > 1 && argv[index][0] == '-') { for (ptr = (unsigned char *) &argv[index][1]; *ptr; ptr++) { |