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From Matt Kraai <kraai@alumni.carnegiemellon.edu>

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> Here is a patch so that tr can handle NULL characters as well.  Give it
> a shot and let me know what you think.  It is against the latest CVS
> version.
>
> In my tests, the following now works as expected.
>
> tr '\0' '\n'
>
> Later,
> Matt
This commit is contained in:
Eric Andersen 2000-07-13 16:40:41 +00:00
parent ac48461da9
commit 00143ba921
2 changed files with 56 additions and 48 deletions
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52
coreutils/tr.c
View File

@ -98,21 +98,23 @@ static void convert()
/* NOTREACHED */
}
static void map(register unsigned char *string1, register unsigned char *string2)
static void map(register unsigned char *string1, unsigned int string1_len,
register unsigned char *string2, unsigned int string2_len)
{
unsigned char last = '0';
unsigned int i, j;
while (*string1) {
if (*string2 == '\0')
vector[*string1] = last;
for (j = 0, i = 0; i < string1_len; i++) {
if (string2_len <= j)
vector[string1[i]] = last;
else
vector[*string1] = last = *string2++;
string1++;
vector[string1[i]] = last = string2[j++];
}
}
static void expand(char *arg, register unsigned char *buffer)
static unsigned int expand(char *arg, register unsigned char *buffer)
{
unsigned char *buffer_start = buffer;
int i, ac;
while (*arg) {
@ -134,29 +136,31 @@ static void expand(char *arg, register unsigned char *buffer)
} else
*buffer++ = *arg++;
}
return (buffer - buffer_start);
}
static void complement(unsigned char *buffer)
static int complement(unsigned char *buffer, unsigned int buffer_len)
{
register unsigned char *ptr;
register short i, index;
register short i, j, index;
unsigned char conv[ASCII + 2];
index = 0;
for (i = 1; i <= ASCII; i++) {
for (ptr = buffer; *ptr; ptr++)
if (*ptr == i)
for (i = 0; i <= ASCII; i++) {
for (j = 0; j < buffer_len; j++)
if (buffer[j] == i)
break;
if (*ptr == '\0')
if (j == buffer_len)
conv[index++] = i & ASCII;
}
conv[index] = '\0';
strcpy((char *) buffer, (char *) conv);
memcpy(buffer, conv, index);
return index;
}
extern int tr_main(int argc, char **argv)
{
register unsigned char *ptr;
unsigned int output_length, input_length;
int index = 1;
short i;
@ -184,19 +188,19 @@ extern int tr_main(int argc, char **argv)
}
if (argv[index] != NULL) {
expand(argv[index++], input);
input_length = expand(argv[index++], input);
if (com_fl)
complement(input);
input_length = complement(input, input_length);
if (argv[index] != NULL) {
if (*argv[index] == '\0')
fatalError("STRING2 cannot be empty\n");
expand(argv[index], output);
map(input, output);
output_length = expand(argv[index], output);
map(input, input_length, output, output_length);
}
for (ptr = input; *ptr; ptr++)
invec[*ptr] = TRUE;
for (ptr = output; *ptr; ptr++)
outvec[*ptr] = TRUE;
for (i = 0; i < input_length; i++)
invec[input[i]] = TRUE;
for (i = 0; i < output_length; i++)
outvec[output[i]] = TRUE;
}
convert();
return (0);

52
tr.c
View File

@ -98,21 +98,23 @@ static void convert()
/* NOTREACHED */
}
static void map(register unsigned char *string1, register unsigned char *string2)
static void map(register unsigned char *string1, unsigned int string1_len,
register unsigned char *string2, unsigned int string2_len)
{
unsigned char last = '0';
unsigned int i, j;
while (*string1) {
if (*string2 == '\0')
vector[*string1] = last;
for (j = 0, i = 0; i < string1_len; i++) {
if (string2_len <= j)
vector[string1[i]] = last;
else
vector[*string1] = last = *string2++;
string1++;
vector[string1[i]] = last = string2[j++];
}
}
static void expand(char *arg, register unsigned char *buffer)
static unsigned int expand(char *arg, register unsigned char *buffer)
{
unsigned char *buffer_start = buffer;
int i, ac;
while (*arg) {
@ -134,29 +136,31 @@ static void expand(char *arg, register unsigned char *buffer)
} else
*buffer++ = *arg++;
}
return (buffer - buffer_start);
}
static void complement(unsigned char *buffer)
static int complement(unsigned char *buffer, unsigned int buffer_len)
{
register unsigned char *ptr;
register short i, index;
register short i, j, index;
unsigned char conv[ASCII + 2];
index = 0;
for (i = 1; i <= ASCII; i++) {
for (ptr = buffer; *ptr; ptr++)
if (*ptr == i)
for (i = 0; i <= ASCII; i++) {
for (j = 0; j < buffer_len; j++)
if (buffer[j] == i)
break;
if (*ptr == '\0')
if (j == buffer_len)
conv[index++] = i & ASCII;
}
conv[index] = '\0';
strcpy((char *) buffer, (char *) conv);
memcpy(buffer, conv, index);
return index;
}
extern int tr_main(int argc, char **argv)
{
register unsigned char *ptr;
unsigned int output_length, input_length;
int index = 1;
short i;
@ -184,19 +188,19 @@ extern int tr_main(int argc, char **argv)
}
if (argv[index] != NULL) {
expand(argv[index++], input);
input_length = expand(argv[index++], input);
if (com_fl)
complement(input);
input_length = complement(input, input_length);
if (argv[index] != NULL) {
if (*argv[index] == '\0')
fatalError("STRING2 cannot be empty\n");
expand(argv[index], output);
map(input, output);
output_length = expand(argv[index], output);
map(input, input_length, output, output_length);
}
for (ptr = input; *ptr; ptr++)
invec[*ptr] = TRUE;
for (ptr = output; *ptr; ptr++)
outvec[*ptr] = TRUE;
for (i = 0; i < input_length; i++)
invec[input[i]] = TRUE;
for (i = 0; i < output_length; i++)
outvec[output[i]] = TRUE;
}
convert();
return (0);