version 1.7, 2015/08/29 15:28:13 |
version 1.31, 2020/04/02 22:12:55 |
|
|
/* $Id$ */ |
/* $Id$ */ |
/* |
/* |
* Copyright (c) 2015 Ingo Schwarze <schwarze@openbsd.org> |
* Copyright (c) 2015,2016,2018,2019,2020 Ingo Schwarze <schwarze@openbsd.org> |
* |
* |
* Permission to use, copy, modify, and distribute this software for any |
* Permission to use, copy, modify, and distribute this software for any |
* purpose with or without fee is hereby granted, provided that the above |
* purpose with or without fee is hereby granted, provided that the above |
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
|
* |
|
* Functions to tag syntax tree nodes. |
|
* For internal use by mandoc(1) validation modules only. |
*/ |
*/ |
#include "config.h" |
#include "config.h" |
|
|
#include <sys/types.h> |
#include <sys/types.h> |
|
|
#include <signal.h> |
#include <assert.h> |
|
#include <limits.h> |
#include <stddef.h> |
#include <stddef.h> |
#include <stdint.h> |
|
#include <stdio.h> |
|
#include <stdlib.h> |
#include <stdlib.h> |
#include <string.h> |
#include <string.h> |
#include <unistd.h> |
|
|
|
#if HAVE_OHASH |
|
#include <ohash.h> |
|
#else |
|
#include "compat_ohash.h" |
|
#endif |
|
|
|
#include "mandoc_aux.h" |
#include "mandoc_aux.h" |
|
#include "mandoc_ohash.h" |
|
#include "roff.h" |
#include "tag.h" |
#include "tag.h" |
|
|
struct tag_entry { |
struct tag_entry { |
size_t line; |
struct roff_node **nodes; |
|
size_t maxnodes; |
|
size_t nnodes; |
int prio; |
int prio; |
char s[]; |
char s[]; |
}; |
}; |
|
|
static void tag_signal(int); |
|
static void *tag_alloc(size_t, void *); |
|
static void tag_free(void *, void *); |
|
static void *tag_calloc(size_t, size_t, void *); |
|
|
|
static struct ohash tag_data; |
static struct ohash tag_data; |
static struct tag_files tag_files; |
|
|
|
|
|
/* |
/* |
* Prepare for using a pager. |
* Set up the ohash table to collect nodes |
* Not all pagers are capable of using a tag file, |
* where various marked-up terms are documented. |
* but for simplicity, create it anyway. |
|
*/ |
*/ |
struct tag_files * |
|
tag_init(void) |
|
{ |
|
struct ohash_info tag_info; |
|
int ofd; |
|
|
|
ofd = -1; |
|
tag_files.tfd = -1; |
|
|
|
/* Save the original standard output for use by the pager. */ |
|
|
|
if ((tag_files.ofd = dup(STDOUT_FILENO)) == -1) |
|
goto fail; |
|
|
|
/* Create both temporary output files. */ |
|
|
|
(void)strlcpy(tag_files.ofn, "/tmp/man.XXXXXXXXXX", |
|
sizeof(tag_files.ofn)); |
|
(void)strlcpy(tag_files.tfn, "/tmp/man.XXXXXXXXXX", |
|
sizeof(tag_files.tfn)); |
|
signal(SIGHUP, tag_signal); |
|
signal(SIGINT, tag_signal); |
|
signal(SIGTERM, tag_signal); |
|
if ((ofd = mkstemp(tag_files.ofn)) == -1) |
|
goto fail; |
|
if ((tag_files.tfd = mkstemp(tag_files.tfn)) == -1) |
|
goto fail; |
|
if (dup2(ofd, STDOUT_FILENO) == -1) |
|
goto fail; |
|
close(ofd); |
|
|
|
/* |
|
* Set up the ohash table to collect output line numbers |
|
* where various marked-up terms are documented. |
|
*/ |
|
|
|
tag_info.alloc = tag_alloc; |
|
tag_info.calloc = tag_calloc; |
|
tag_info.free = tag_free; |
|
tag_info.key_offset = offsetof(struct tag_entry, s); |
|
tag_info.data = NULL; |
|
ohash_init(&tag_data, 4, &tag_info); |
|
return(&tag_files); |
|
|
|
fail: |
|
tag_unlink(); |
|
if (ofd != -1) |
|
close(ofd); |
|
if (tag_files.ofd != -1) |
|
close(tag_files.ofd); |
|
if (tag_files.tfd != -1) |
|
close(tag_files.tfd); |
|
*tag_files.ofn = '\0'; |
|
*tag_files.tfn = '\0'; |
|
tag_files.ofd = -1; |
|
tag_files.tfd = -1; |
|
return(NULL); |
|
} |
|
|
|
/* |
|
* Set the line number where a term is defined, |
|
* unless it is already defined at a higher priority. |
|
*/ |
|
void |
void |
tag_put(const char *s, int prio, size_t line) |
tag_alloc(void) |
{ |
{ |
struct tag_entry *entry; |
mandoc_ohash_init(&tag_data, 4, offsetof(struct tag_entry, s)); |
size_t len; |
|
unsigned int slot; |
|
|
|
if (tag_files.tfd <= 0) |
|
return; |
|
slot = ohash_qlookup(&tag_data, s); |
|
entry = ohash_find(&tag_data, slot); |
|
if (entry == NULL) { |
|
len = strlen(s) + 1; |
|
entry = mandoc_malloc(sizeof(*entry) + len); |
|
memcpy(entry->s, s, len); |
|
ohash_insert(&tag_data, slot, entry); |
|
} else if (entry->prio <= prio) |
|
return; |
|
entry->line = line; |
|
entry->prio = prio; |
|
} |
} |
|
|
/* |
|
* Write out the tags file using the previously collected |
|
* information and clear the ohash table while going along. |
|
*/ |
|
void |
void |
tag_write(void) |
tag_free(void) |
{ |
{ |
FILE *stream; |
|
struct tag_entry *entry; |
struct tag_entry *entry; |
unsigned int slot; |
unsigned int slot; |
|
|
if (tag_files.tfd <= 0) |
if (tag_data.info.free == NULL) |
return; |
return; |
stream = fdopen(tag_files.tfd, "w"); |
|
entry = ohash_first(&tag_data, &slot); |
entry = ohash_first(&tag_data, &slot); |
while (entry != NULL) { |
while (entry != NULL) { |
if (stream != NULL) |
free(entry->nodes); |
fprintf(stream, "%s %s %zu\n", |
|
entry->s, tag_files.ofn, entry->line); |
|
free(entry); |
free(entry); |
entry = ohash_next(&tag_data, &slot); |
entry = ohash_next(&tag_data, &slot); |
} |
} |
ohash_delete(&tag_data); |
ohash_delete(&tag_data); |
if (stream != NULL) |
tag_data.info.free = NULL; |
fclose(stream); |
|
} |
} |
|
|
|
/* |
|
* Set a node where a term is defined, |
|
* unless it is already defined at a lower priority. |
|
*/ |
void |
void |
tag_unlink(void) |
tag_put(const char *s, int prio, struct roff_node *n) |
{ |
{ |
|
struct tag_entry *entry; |
|
const char *se; |
|
size_t len; |
|
unsigned int slot; |
|
|
if (*tag_files.ofn != '\0') |
assert(prio <= TAG_FALLBACK); |
unlink(tag_files.ofn); |
|
if (*tag_files.tfn != '\0') |
|
unlink(tag_files.tfn); |
|
} |
|
|
|
static void |
if (s == NULL) { |
tag_signal(int signum) |
if (n->child == NULL || n->child->type != ROFFT_TEXT) |
{ |
return; |
|
s = n->child->string; |
|
switch (s[0]) { |
|
case '-': |
|
s++; |
|
break; |
|
case '\\': |
|
switch (s[1]) { |
|
case '&': |
|
case '-': |
|
case 'e': |
|
s += 2; |
|
break; |
|
default: |
|
break; |
|
} |
|
break; |
|
default: |
|
break; |
|
} |
|
} |
|
|
tag_unlink(); |
/* |
signal(signum, SIG_DFL); |
* Skip whitespace and escapes and whatever follows, |
kill(getpid(), signum); |
* and if there is any, downgrade the priority. |
/* NOTREACHED */ |
*/ |
_exit(1); |
|
} |
|
|
|
/* |
len = strcspn(s, " \t\\"); |
* Memory management callback functions for ohash. |
if (len == 0) |
*/ |
return; |
static void * |
|
tag_alloc(size_t sz, void *arg) |
|
{ |
|
|
|
return(mandoc_malloc(sz)); |
se = s + len; |
} |
if (*se != '\0' && prio < TAG_WEAK) |
|
prio = TAG_WEAK; |
|
|
static void * |
slot = ohash_qlookupi(&tag_data, s, &se); |
tag_calloc(size_t nmemb, size_t sz, void *arg) |
entry = ohash_find(&tag_data, slot); |
{ |
|
|
|
return(mandoc_calloc(nmemb, sz)); |
/* Build a new entry. */ |
|
|
|
if (entry == NULL) { |
|
entry = mandoc_malloc(sizeof(*entry) + len + 1); |
|
memcpy(entry->s, s, len); |
|
entry->s[len] = '\0'; |
|
entry->nodes = NULL; |
|
entry->maxnodes = entry->nnodes = 0; |
|
ohash_insert(&tag_data, slot, entry); |
|
} |
|
|
|
/* |
|
* Lower priority numbers take precedence. |
|
* If a better entry is already present, ignore the new one. |
|
*/ |
|
|
|
else if (entry->prio < prio) |
|
return; |
|
|
|
/* |
|
* If the existing entry is worse, clear it. |
|
* In addition, a tag with priority TAG_FALLBACK |
|
* is only used if the tag occurs exactly once. |
|
*/ |
|
|
|
else if (entry->prio > prio || prio == TAG_FALLBACK) { |
|
while (entry->nnodes > 0) |
|
entry->nodes[--entry->nnodes]->flags &= ~NODE_ID; |
|
|
|
if (prio == TAG_FALLBACK) { |
|
entry->prio = TAG_DELETE; |
|
return; |
|
} |
|
} |
|
|
|
/* Remember the new node. */ |
|
|
|
if (entry->maxnodes == entry->nnodes) { |
|
entry->maxnodes += 4; |
|
entry->nodes = mandoc_reallocarray(entry->nodes, |
|
entry->maxnodes, sizeof(*entry->nodes)); |
|
} |
|
entry->nodes[entry->nnodes++] = n; |
|
entry->prio = prio; |
|
n->flags |= NODE_ID; |
|
if (n->child == NULL || n->child->string != s || *se != '\0') { |
|
assert(n->string == NULL); |
|
n->string = mandoc_strndup(s, len); |
|
} |
} |
} |
|
|
static void |
int |
tag_free(void *p, void *arg) |
tag_exists(const char *tag) |
{ |
{ |
|
return ohash_find(&tag_data, ohash_qlookup(&tag_data, tag)) != NULL; |
free(p); |
|
} |
} |