---
Makefile | 1 +
tr.c | 487 ++++++++++++++++++++++++---------------------------------------
utf.h | 1 +
3 files changed, 189 insertions(+), 300 deletions(-)
diff --git a/Makefile b/Makefile
index 14dc982..b4565bf 100644
--- a/Makefile
+++ b/Makefile
_AT_@ -20,6 +20,7 @@ HDR =\
LIBUTF = libutf.a
LIBUTFSRC =\
+ libutf/chartorunearr.c\
libutf/readrune.c\
libutf/rune.c\
libutf/runetype.c\
diff --git a/tr.c b/tr.c
index b661048..cfd1c94 100644
--- a/tr.c
+++ b/tr.c
_AT_@ -1,356 +1,243 @@
-/* See LICENSE file for copyright and license details. */
-#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
-#include <string.h>
-#include <wchar.h>
-#include "text.h"
+#include "utf.h"
#include "util.h"
-static void
-usage(void)
-{
- eprintf("usage: %s [-d] [-c] set1 [set2]\n", argv0);
-}
-
-static int dflag, cflag;
-static wchar_t mappings[0x110000];
+static int cflag = 0;
+static int dflag = 0;
+static int sflag = 0;
-struct wset_state {
- char *s; /* current character */
- wchar_t rfirst, rlast; /* first and last in range */
- wchar_t prev; /* previous returned character */
- int prev_was_range; /* was the previous character part of a c-c range? */
+struct range {
+ Rune start;
+ Rune end;
+ size_t quant;
};
-struct set_state {
- char *s, rfirst, rlast, prev;
- int prev_was_octal; /* was the previous returned character written in octal? */
+#define DIGIT "0-9"
+#define UPPER "A-Z"
+#define LOWER "a-z"
+#define PUNCT "!\"#$%&'()*+,-./:;<=>?_AT_[\\]^_`{|}~"
+#define ALNUM DIGIT UPPER LOWER
+
+struct class {
+ char *name;
+ char *str;
+} classes[] = {
+ { "alnum", ALNUM },
+ { "alpha", UPPER LOWER },
+ { "blank", " \t" },
+ { "cntrl", "\000-\037\177" },
+ { "digit", DIGIT },
+ { "graph", ALNUM PUNCT },
+ { "lower", LOWER },
+ { "print", ALNUM PUNCT " " },
+ { "punct", PUNCT },
+ { "space", "\t\n\v\f\r" },
+ { "upper", UPPER },
+ { "xdigit", DIGIT "A-Fa-f" },
};
-static void
-set_state_defaults(struct set_state *s)
-{
- s->rfirst = 1;
- s->rlast = 0;
- s->prev_was_octal = 1;
-}
+struct range *set1 = NULL;
+size_t set1ranges = 0;
+struct range *set2 = NULL;
+size_t set2ranges = 0;
-static void
-wset_state_defaults(struct wset_state *s)
+static size_t
+rangelen(struct range r)
{
- s->rfirst = 1;
- s->rlast = 0;
- s->prev_was_range = 1;
+ return (r.end - r.start + 1) * r.quant;
}
-/* sets *s to the char that was intended to be written.
- * returns how many bytes the s pointer has to advance to skip the
- * escape sequence if it was an octal, always zero otherwise. */
-static int
-resolve_escape(char *s)
+static size_t
+setlen(struct range *set, size_t setranges)
{
int i;
- unsigned char c;
-
- switch (*s) {
- case 'n':
- *s = '\n';
- return 0;
- case 't':
- *s = '\t';
- return 0;
- case 'r':
- *s = '\r';
- return 0;
- case 'f':
- *s = '\f';
- return 0;
- case 'a':
- *s = '\a';
- return 0;
- case 'b':
- *s = '\b';
- return 0;
- case 'v':
- *s = '\v';
- return 0;
- case '\\':
- *s = '\\';
- return 0;
- case '\0':
- eprintf("stray '\\' at end of input:");
- default: ;
- }
+ size_t len = 0;
- if(*s < '0' || *s > '7')
- eprintf("invalid character after '\\':");
- for(i = 0, c = 0; s[i] >= '0' && s[i] <= '7' && i < 3; i++) {
- c <<= 3;
- c += s[i]-'0';
- }
- if(*s > '3' && i == 3)
- eprintf("octal byte cannot be bigger than 377:");
- *s = c;
- return i;
-}
-
-#define embtowc(a, b) mbtowc(a, b, 4)
-
-static int
-xmbtowc(wchar_t *unicodep, const char *s)
-{
- int rv;
+ for (i = 0; i < setranges; i++)
+ len += rangelen(set[i]);
- rv = embtowc(unicodep, s);
- if (rv < 0)
- eprintf("mbtowc: invalid input sequence:");
- return rv;
+ return len;
}
static int
-has_octal_escapes(const char *s)
-{
- while (*s)
- if (*s++ == '\\' && *s >= '0' && *s <= '7')
- return 1;
- return 0;
-}
-
-static char
-get_next_char(struct set_state *s)
-{
- char c;
- int nchars;
-
-start:
- if (s->rfirst <= s->rlast) {
- c = s->rfirst;
- s->rfirst++;
- return c;
- }
-
- if (*s->s == '-' && !s->prev_was_octal) {
- s->s++;
- if (!*s->s)
- return '-';
- if (*s->s == '\\' && (nchars = resolve_escape(++(s->s))))
- goto char_is_octal;
- s->rlast = *(s->s)++;
- if (!s->rlast)
- return '\0';
- s->prev_was_octal = 1;
- s->rfirst = ++(s->prev);
- goto start;
- }
- if (*s->s == '\\' && (nchars = resolve_escape(++(s->s))))
- goto char_is_octal;
-
- s->prev_was_octal = 0;
- c = *(s->s)++;
- s->prev = c;
- return c;
-
-char_is_octal:
- s->prev_was_octal = 1;
- c = *s->s;
- s->s += nchars;
- return c;
-}
-
-static wchar_t
-get_next_wchar(struct wset_state *s)
+rstrmatch(Rune *r, char *s, size_t n)
{
-start:
- if (s->rfirst <= s->rlast) {
- s->prev = s->rfirst;
- s->rfirst++;
- return s->prev;
- }
-
- if (*s->s == '-' && !s->prev_was_range) {
- s->s++;
- if (!*s->s)
- return '-';
- if (*s->s == '\\')
- resolve_escape(++(s->s));
- s->s += xmbtowc(&s->rlast, s->s);
- if (!s->rlast)
- return '\0';
- s->rfirst = ++(s->prev);
- s->prev_was_range = 1;
- goto start;
- }
+ size_t i;
- if (*s->s == '\\')
- resolve_escape(++(s->s));
- s->s += xmbtowc(&s->prev, s->s);
- s->prev_was_range = 0;
- return s->prev;
+ for (i = 0; i < n; i++)
+ if (r[i] != s[i])
+ return 0;
+ return 1;
}
-static int
-is_mapping_wide(const char *set1, const char *set2)
+static size_t
+makeset(char *str, struct range **set)
{
- struct set_state ss1, ss2;
- struct wset_state wss1, wss2;
- wchar_t wc1, wc2, last_wc2;
-
- if (has_octal_escapes(set1)) {
- set_state_defaults(&ss1);
- ss1.s = (char *) set1;
- if (set2) {
- set_state_defaults(&ss2);
- ss2.s = (char *) set2;
- /* if the character returned is from an octal triplet, it might be null
- * and still need to continue */
- while ((wc1 = (unsigned char) get_next_char(&ss1)) || ss1.prev_was_octal ) {
- if (!(wc2 = (unsigned char) get_next_char(&ss2)))
- wc2 = last_wc2;
- mappings[wc1] = wc2;
- last_wc2 = wc2;
- }
- } else {
- while ((wc1 = (unsigned char) get_next_char(&ss1)) || ss1.prev_was_octal)
- mappings[wc1] = 1;
- }
- return 0;
- } else {
- wset_state_defaults(&wss1);
- wss1.s = (char *) set1;
- if (set2) {
- wset_state_defaults(&wss2);
- wss2.s = (char *) set2;
- while ((wc1 = get_next_wchar(&wss1))) {
- if (!(wc2 = get_next_wchar(&wss2)))
- wc2 = last_wc2;
- mappings[wc1] = wc2;
- last_wc2 = wc2;
+ Rune *rstr;
+ size_t len, i, j, m, n;
+ size_t q, setranges;
+ int factor, base;
+
+reset:
+ setranges = 0;
+
+ /* rstr defines at most len ranges */
+ len = chartorunearr(str, &rstr);
+ *set = emalloc(len * sizeof(**set));
+
+ /* todo: allow expressions */
+ for (i = 0; i < len; i++) {
+ if (rstr[i] == '[') {
+ j = i;
+nextbrack:
+ if (j == len)
+ goto literal;
+ for (m = j; m < len; m++)
+ if (rstr[m] == ']') {
+ j = m;
+ break;
+ }
+ if (j == i)
+ goto literal;
+
+ /* CLASSES [=EQUIV=] (skip) */
+ if (j - i > 3 && rstr[i + 1] == '=' && rstr[m - 1] == '=') {
+ i = j;
+ continue;
}
- } else {
- while ((wc1 = get_next_wchar(&wss1)))
- mappings[wc1] = 1;
- }
- return 1;
- }
- return 0; /* unreachable */
-}
-
-static void
-wmap_null(char *in, ssize_t nbytes)
-{
- char *s;
- wchar_t rune;
- int parsed_bytes = 0;
- s = in;
- while (nbytes) {
- parsed_bytes = embtowc(&rune, s);
- if (parsed_bytes < 0) {
- rune = *s;
- parsed_bytes = 1;
- }
- if (((!mappings[rune])&1) ^ cflag)
- putwchar(rune);
- s += parsed_bytes;
- nbytes -= parsed_bytes;
- }
-}
+ /* CLASSES [:CLASS:] */
+ if (j - i > 3 && rstr[i + 1] == ':' && rstr[m - 1] == ':') {
+ for (n = 0; n < LEN(classes); n++) {
+ if (rstrmatch(rstr + i + 2, classes[n].name, j - i - 3)) {
+ str = classes[n].str;
+ goto reset;
+ }
+ }
+ eprintf("Invalid character class\n");
+ }
-static void
-wmap_set(char *in, ssize_t nbytes)
-{
- char *s;
- wchar_t rune;
- int parsed_bytes = 0;
+ /* REPEAT [_*n] (only allowed in set2) */
+ if (j - i > 2 && rstr[i + 2] == '*' && set1ranges > 0) {
+ /* check if right side of '*' is a number */
+ q = 0;
+ factor = 1;
+ base = (rstr[i + 3] == '0') ? 8 : 10;
+ for (n = j - 1; n > i + 2; n--) {
+ if (rstr[n] < '0' && rstr[n] > '9') {
+ n = 0;
+ break;
+ }
+ q += (rstr[n] - '0') * factor;
+ factor *= base;
+ }
+
+ if (n == 0) {
+ j = m + 1;
+ goto nextbrack;
+ }
+ (*set)[setranges].start = rstr[i + 1];
+ (*set)[setranges].end = rstr[i + 1];
+ (*set)[setranges].quant = q ? q : setlen(set1, set1ranges);
+ setranges++;
+ i = j;
+ continue;
+ }
- s = in;
- while (nbytes) {
- parsed_bytes = embtowc(&rune, s);
- if (parsed_bytes < 0) {
- rune = *s;
- parsed_bytes = 1;
+ j = m + 1;
+ goto nextbrack;
}
- if (!mappings[rune])
- putwchar(rune);
- else
- putwchar(mappings[rune]);
- nbytes -= parsed_bytes;
- s += parsed_bytes;
+literal:
+ /* RANGES [_-__-_], _-__-_ */
+ /* LITERALS _______ */
+ (*set)[setranges].start = rstr[i];
+
+ if (i < len - 2 && rstr[i + 1] == '-' && rstr[i + 2] >= rstr[i])
+ i += 2;
+ (*set)[setranges].end = rstr[i];
+ (*set)[setranges].quant = 1;
+ setranges++;
}
-}
-static void
-map_null(char *in, ssize_t nbytes)
-{
- char *s;
-
- for (s = in; nbytes; s++, nbytes--)
- if (((!mappings[(unsigned char)*s])&1) ^ cflag)
- putchar(*s);
+ free(rstr);
+ return setranges;
}
static void
-map_set(char *in, ssize_t nbytes)
+usage(void)
{
- char *s;
-
- for (s = in; nbytes; s++, nbytes--)
- if (!mappings[(unsigned char)*s])
- putchar(*s);
- else
- putchar(mappings[(unsigned char)*s]);
+ eprintf("usage: %s [-cCds] set1 [set2]\n", argv0);
}
int
main(int argc, char *argv[])
{
- char *buf = NULL;
- size_t size = 0;
- ssize_t nbytes;
- void (*mapfunc)(char*, ssize_t);
-
- setlocale(LC_ALL, "");
- dflag = cflag = 0;
+ Rune r = 0, lastrune = 0;
+ int i, m;
+ size_t off1, off2;
ARGBEGIN {
+ case 'c':
+ case 'C':
+ cflag = 1;
+ break;
case 'd':
dflag = 1;
break;
- case 'c':
- cflag = 1;
+ case 's':
+ sflag = 1;
break;
default:
usage();
} ARGEND;
- if (argc == 0)
+ if (argc < 1 || argc > 2 || (argc == 1 && dflag == sflag))
usage();
+ set1ranges = makeset(argv[0], &set1);
+ if (argc == 2)
+ set2ranges = makeset(argv[1], &set2);
+read:
+ if (!readrune("<stdin>", stdin, &r))
+ return 0;
+ off1 = off2 = 0;
+ for (i = 0; i < set1ranges; i++) {
+ if (set1[i].start <= r && r <= set1[i].end) {
+ if (dflag && !cflag)
+ goto read;
+ if (sflag) {
+ if (r == lastrune)
+ goto read;
+ else
+ goto write;
+ }
+ for (m = 0; m < i; m++)
+ off1 += rangelen(set1[m]);
+ off1 += r - set1[m].start;
+ if (off1 > setlen(set2, set2ranges) - 1) {
+ r = set2[set2ranges - 1].end;
+ goto write;
+ }
+ for (m = 0; m < set2ranges; m++) {
+ if (off2 + rangelen(set2[m]) > off1) {
+ m++;
+ break;
+ }
+ off2 += rangelen(set2[m]);
+ }
+ m--;
+ r = set2[m].start + (off1 - off2) / set2[m].quant;
- if (dflag) {
- if (argc != 1)
- usage();
- if (is_mapping_wide(argv[0], NULL))
- mapfunc = wmap_null;
- else
- mapfunc = map_null;
- } else if (cflag) {
- usage();
- } else if (argc == 2) {
- if (is_mapping_wide(argv[0], argv[1]))
- mapfunc = wmap_set;
- else
- mapfunc = map_set;
- } else {
- usage();
+ goto write;
+ }
}
-
- while ((nbytes = getline(&buf, &size, stdin)) != -1)
- mapfunc(buf, nbytes);
- free(buf);
- if (ferror(stdin))
- eprintf("<stdin>: read error:");
-
- return 0;
+ if (dflag && cflag)
+ goto read;
+ if (dflag && sflag && r == lastrune)
+ goto read;
+write:
+ lastrune = r;
+ writerune("<stdout>", stdout, &r);
+ goto read;
}
diff --git a/utf.h b/utf.h
index 26b9a6f..96cc361 100644
--- a/utf.h
+++ b/utf.h
_AT_@ -51,3 +51,4 @@ int isdigitrune(Rune);
int readrune(const char *, FILE *, Rune *);
void writerune(const char *, FILE *, Rune *);
+int chartorunearr(const char*, Rune **);
--
1.8.5.5
--Multipart=_Fri__9_Jan_2015_20_39_48_+0100_fSb_cOlaMpP7Gib6--
Received on Mon Sep 17 2001 - 00:00:00 CEST
This archive was generated by hypermail 2.3.0 : Fri Jan 09 2015 - 22:12:04 CET