version 1.113, 2009/10/26 17:05:44 |
version 1.124, 2009/11/07 14:14:16 |
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
*/ |
*/ |
#include <assert.h> |
#include <assert.h> |
#include <err.h> |
#include <ctype.h> |
#include <stdio.h> |
#include <stdio.h> |
#include <stdlib.h> |
#include <stdlib.h> |
#include <string.h> |
#include <string.h> |
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static struct termp *term_alloc(enum termenc); |
static struct termp *term_alloc(enum termenc); |
static void term_free(struct termp *); |
static void term_free(struct termp *); |
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static void do_escaped(struct termp *, const char **); |
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static void do_special(struct termp *, |
static void do_special(struct termp *, |
const char *, size_t); |
const char *, size_t); |
static void do_reserved(struct termp *, |
static void do_reserved(struct termp *, |
Line 77 term_alloc(enum termenc enc) |
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Line 76 term_alloc(enum termenc enc) |
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{ |
{ |
struct termp *p; |
struct termp *p; |
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if (NULL == (p = malloc(sizeof(struct termp)))) |
p = calloc(1, sizeof(struct termp)); |
return(NULL); |
if (NULL == p) { |
bzero(p, sizeof(struct termp)); |
perror(NULL); |
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exit(EXIT_FAILURE); |
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} |
p->maxrmargin = 78; |
p->maxrmargin = 78; |
p->enc = enc; |
p->enc = enc; |
return(p); |
return(p); |
Line 120 term_alloc(enum termenc enc) |
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Line 121 term_alloc(enum termenc enc) |
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* If TERMP_NOBREAK is specified and the line overruns the right |
* If TERMP_NOBREAK is specified and the line overruns the right |
* margin, it will break and pad-right to the right margin after |
* margin, it will break and pad-right to the right margin after |
* writing. If maxrmargin is violated, it will break and continue |
* writing. If maxrmargin is violated, it will break and continue |
* writing from the right-margin, which will lead to the above |
* writing from the right-margin, which will lead to the above scenario |
* scenario upon exit. |
* upon exit. Otherwise, the line will break at the right margin. |
* |
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* Otherwise, the line will break at the right margin. Extremely long |
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* lines will cause the system to emit a warning (TODO: hyphenate, if |
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* possible). |
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*/ |
*/ |
void |
void |
term_flushln(struct termp *p) |
term_flushln(struct termp *p) |
{ |
{ |
int i, j; |
int i; /* current input position in p->buf */ |
size_t vbl, vsz, vis, maxvis, mmax, bp; |
size_t vis; /* current visual position on output */ |
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size_t vbl; /* number of blanks to prepend to output */ |
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size_t vsz; /* visual characters to write to output */ |
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size_t bp; /* visual right border position */ |
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int j; /* temporary loop index */ |
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size_t maxvis, mmax; |
static int overstep = 0; |
static int overstep = 0; |
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/* |
/* |
* First, establish the maximum columns of "visible" content. |
* First, establish the maximum columns of "visible" content. |
* This is usually the difference between the right-margin and |
* This is usually the difference between the right-margin and |
* an indentation, but can be, for tagged lists or columns, a |
* an indentation, but can be, for tagged lists or columns, a |
* small set of values. |
* small set of values. |
*/ |
*/ |
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assert(p->offset < p->rmargin); |
assert(p->offset < p->rmargin); |
assert((int)(p->rmargin - p->offset) - overstep > 0); |
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maxvis = /* LINTED */ |
maxvis = (int)(p->rmargin - p->offset) - overstep < 0 ? |
p->rmargin - p->offset - overstep; |
/* LINTED */ |
mmax = /* LINTED */ |
0 : p->rmargin - p->offset - overstep; |
p->maxrmargin - p->offset - overstep; |
mmax = (int)(p->maxrmargin - p->offset) - overstep < 0 ? |
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/* LINTED */ |
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0 : p->maxrmargin - p->offset - overstep; |
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bp = TERMP_NOBREAK & p->flags ? mmax : maxvis; |
bp = TERMP_NOBREAK & p->flags ? mmax : maxvis; |
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/* |
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* FIXME: if bp is zero, we still output the first word before |
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* breaking the line. |
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*/ |
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vis = 0; |
vis = 0; |
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/* |
/* |
Line 220 term_flushln(struct termp *p) |
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Line 229 term_flushln(struct termp *p) |
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for ( ; i < (int)p->col; i++) { |
for ( ; i < (int)p->col; i++) { |
if (' ' == p->buf[i]) |
if (' ' == p->buf[i]) |
break; |
break; |
putchar(p->buf[i]); |
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/* The unit sep. is a non-breaking space. */ |
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if (31 == p->buf[i]) |
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putchar(' '); |
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else |
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putchar(p->buf[i]); |
} |
} |
vis += vsz; |
vis += vsz; |
} |
} |
Line 352 do_reserved(struct termp *p, const char *word, size_t |
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Line 366 do_reserved(struct termp *p, const char *word, size_t |
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/* |
/* |
* Handle an escape sequence: determine its length and pass it to the |
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* escape-symbol look table. Note that we assume mdoc(3) has validated |
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* the escape sequence (we assert upon badly-formed escape sequences). |
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*/ |
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static void |
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do_escaped(struct termp *p, const char **word) |
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{ |
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int j, type; |
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const char *wp; |
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wp = *word; |
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type = 1; |
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if (0 == *(++wp)) { |
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*word = wp; |
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return; |
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} |
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if ('(' == *wp) { |
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wp++; |
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if (0 == *wp || 0 == *(wp + 1)) { |
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*word = 0 == *wp ? wp : wp + 1; |
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return; |
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} |
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do_special(p, wp, 2); |
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*word = ++wp; |
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return; |
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} else if ('*' == *wp) { |
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if (0 == *(++wp)) { |
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*word = wp; |
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return; |
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} |
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switch (*wp) { |
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case ('('): |
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wp++; |
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if (0 == *wp || 0 == *(wp + 1)) { |
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*word = 0 == *wp ? wp : wp + 1; |
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return; |
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} |
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do_reserved(p, wp, 2); |
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*word = ++wp; |
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return; |
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case ('['): |
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type = 0; |
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break; |
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default: |
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do_reserved(p, wp, 1); |
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*word = wp; |
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return; |
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} |
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} else if ('f' == *wp) { |
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if (0 == *(++wp)) { |
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*word = wp; |
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return; |
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} |
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switch (*wp) { |
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case ('B'): |
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p->bold++; |
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break; |
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case ('I'): |
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p->under++; |
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break; |
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case ('P'): |
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/* FALLTHROUGH */ |
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case ('R'): |
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p->bold = p->under = 0; |
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break; |
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default: |
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break; |
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} |
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*word = wp; |
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return; |
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} else if ('[' != *wp) { |
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do_special(p, wp, 1); |
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*word = wp; |
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return; |
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} |
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wp++; |
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for (j = 0; *wp && ']' != *wp; wp++, j++) |
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/* Loop... */ ; |
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if (0 == *wp) { |
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*word = wp; |
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return; |
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} |
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if (type) |
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do_special(p, wp - j, (size_t)j); |
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else |
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do_reserved(p, wp - j, (size_t)j); |
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*word = wp; |
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} |
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/* |
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* Handle pwords, partial words, which may be either a single word or a |
* Handle pwords, partial words, which may be either a single word or a |
* phrase that cannot be broken down (such as a literal string). This |
* phrase that cannot be broken down (such as a literal string). This |
* handles word styling. |
* handles word styling. |
Line 463 do_escaped(struct termp *p, const char **word) |
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Line 373 do_escaped(struct termp *p, const char **word) |
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void |
void |
term_word(struct termp *p, const char *word) |
term_word(struct termp *p, const char *word) |
{ |
{ |
const char *sv; |
const char *sv, *seq; |
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int sz, meta; |
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size_t ssz; |
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enum roffdeco deco; |
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sv = word; |
sv = word; |
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if (word[0] && 0 == word[1]) |
if (word[0] && '\0' == word[1]) |
switch (word[0]) { |
switch (word[0]) { |
case('.'): |
case('.'): |
/* FALLTHROUGH */ |
/* FALLTHROUGH */ |
Line 499 term_word(struct termp *p, const char *word) |
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Line 412 term_word(struct termp *p, const char *word) |
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if ( ! (p->flags & TERMP_NONOSPACE)) |
if ( ! (p->flags & TERMP_NONOSPACE)) |
p->flags &= ~TERMP_NOSPACE; |
p->flags &= ~TERMP_NOSPACE; |
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for ( ; *word; word++) |
/* |
if ('\\' != *word) |
* FIXME: it's faster to put the metafont conditional here, |
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* because most of the time we're not a metafont and can use |
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* strcspn and fwrite. |
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*/ |
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while (*word) { |
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if ('\\' != *word) { |
encode(p, *word); |
encode(p, *word); |
else |
word++; |
do_escaped(p, &word); |
continue; |
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} |
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seq = ++word; |
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sz = a2roffdeco(&deco, &seq, &ssz); |
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switch (deco) { |
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case (DECO_RESERVED): |
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do_reserved(p, seq, ssz); |
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break; |
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case (DECO_SPECIAL): |
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do_special(p, seq, ssz); |
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break; |
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case (DECO_BOLD): |
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p->metamask = p->metafont; |
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p->metafont |= METAF_BOLD; |
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break; |
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case (DECO_ITALIC): |
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p->metamask = p->metafont; |
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p->metafont |= METAF_UNDER; |
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break; |
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case (DECO_ROMAN): |
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p->metamask = p->metafont; |
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p->metafont &= ~METAF_UNDER; |
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p->metafont &= ~METAF_BOLD; |
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break; |
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case (DECO_PREVIOUS): |
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meta = p->metamask; |
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p->metamask = p->metafont; |
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p->metafont = meta; |
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break; |
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default: |
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break; |
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} |
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word += sz; |
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} |
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if (sv[0] && 0 == sv[1]) |
if (sv[0] && 0 == sv[1]) |
switch (sv[0]) { |
switch (sv[0]) { |
case('('): |
case('('): |
Line 535 buffer(struct termp *p, char c) |
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Line 489 buffer(struct termp *p, char c) |
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p->maxcols = 256; |
p->maxcols = 256; |
s = p->maxcols * 2; |
s = p->maxcols * 2; |
p->buf = realloc(p->buf, s); |
p->buf = realloc(p->buf, s); |
if (NULL == p->buf) |
if (NULL == p->buf) { |
err(1, "realloc"); /* FIXME: shouldn't be here! */ |
perror(NULL); |
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exit(EXIT_FAILURE); |
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} |
p->maxcols = s; |
p->maxcols = s; |
} |
} |
p->buf[(int)(p->col)++] = c; |
p->buf[(int)(p->col)++] = c; |
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encode(struct termp *p, char c) |
encode(struct termp *p, char c) |
{ |
{ |
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if (' ' != c) { |
if (isgraph((u_char)c)) { |
if (p->under) { |
if (p->under || METAF_UNDER & p->metafont) { |
buffer(p, '_'); |
buffer(p, '_'); |
buffer(p, 8); |
buffer(p, 8); |
} |
} |
if (p->bold) { |
if (p->bold || METAF_BOLD & p->metafont) { |
buffer(p, c); |
buffer(p, c); |
buffer(p, 8); |
buffer(p, 8); |
} |
} |