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Diffstat (limited to 'tr.c')
-rw-r--r--tr.c40
1 files changed, 26 insertions, 14 deletions
diff --git a/tr.c b/tr.c
index fd547b87d..d21e672fe 100644
--- a/tr.c
+++ b/tr.c
@@ -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++) {