mirror of
https://github.com/GnoConsortium/gno.git
synced 2024-10-20 14:24:04 +00:00
784e3de7cd
passwd, ps, purge, shutdown, stty, upper, and vi. These sources are for the versions of the utils shipped with GNO v2.0.4.
180 lines
3.5 KiB
C
180 lines
3.5 KiB
C
#pragma noroot
|
|
#include <stdio.h>
|
|
#include "less.h"
|
|
|
|
#ifdef _ORCAC_
|
|
segment "LoadSegONE";
|
|
#endif
|
|
|
|
#define WHITESP(c) ((c)==' ' || (c)=='\t')
|
|
#if TAGS
|
|
|
|
public char *tagfile;
|
|
public char *tagpattern;
|
|
|
|
public char *tags = "tags";
|
|
|
|
extern int linenums;
|
|
extern int sigs;
|
|
extern int jump_sline;
|
|
|
|
/*
|
|
* Find a tag in the "tags" file.
|
|
* Sets "tagfile" to the name of the file containing the tag,
|
|
* and "tagpattern" to the search pattern which should be used
|
|
* to find the tag.
|
|
*/
|
|
public void
|
|
findtag(tag)
|
|
register char *tag;
|
|
{
|
|
register char *p;
|
|
register FILE *f;
|
|
register int taglen;
|
|
int search_char;
|
|
static char tline[200];
|
|
|
|
if ((f = fopen(tags, "r")) == NULL)
|
|
{
|
|
error("No tags file", NULL_PARG);
|
|
tagfile = NULL;
|
|
return;
|
|
}
|
|
|
|
taglen = strlen(tag);
|
|
|
|
/*
|
|
* Search the tags file for the desired tag.
|
|
*/
|
|
while (fgets(tline, sizeof(tline), f) != NULL)
|
|
{
|
|
if (strncmp(tag, tline, taglen) != 0 || !WHITESP(tline[taglen]))
|
|
continue;
|
|
|
|
/*
|
|
* Found it.
|
|
* The line contains the tag, the filename and the
|
|
* pattern, separated by white space.
|
|
* The pattern is surrounded by a pair of identical
|
|
* search characters.
|
|
* Parse the line and extract these parts.
|
|
*/
|
|
tagfile = tagpattern = NULL;
|
|
|
|
/*
|
|
* Skip over the whitespace after the tag name.
|
|
*/
|
|
for (p = tline; !WHITESP(*p) && *p != '\0'; p++)
|
|
continue;
|
|
while (WHITESP(*p))
|
|
p++;
|
|
if (*p == '\0')
|
|
/* File name is missing! */
|
|
continue;
|
|
|
|
/*
|
|
* Save the file name.
|
|
* Skip over the whitespace after the file name.
|
|
*/
|
|
tagfile = p;
|
|
while (!WHITESP(*p) && *p != '\0')
|
|
p++;
|
|
*p++ = '\0';
|
|
while (WHITESP(*p))
|
|
p++;
|
|
if (*p == '\0')
|
|
/* Pattern is missing! */
|
|
continue;
|
|
|
|
/*
|
|
* Save the pattern.
|
|
* Skip to the end of the pattern.
|
|
* Delete the initial "^" and the final "$" from the pattern.
|
|
*/
|
|
search_char = *p++;
|
|
if (*p == '^')
|
|
p++;
|
|
tagpattern = p;
|
|
while (*p != search_char && *p != '\0')
|
|
p++;
|
|
if (p[-1] == '$')
|
|
p--;
|
|
*p = '\0';
|
|
|
|
fclose(f);
|
|
return;
|
|
}
|
|
fclose(f);
|
|
error("No such tag in tags file", NULL_PARG);
|
|
tagfile = NULL;
|
|
}
|
|
|
|
/*
|
|
* Search for a tag.
|
|
* This is a stripped-down version of search().
|
|
* We don't use search() for several reasons:
|
|
* - We don't want to blow away any search string we may have saved.
|
|
* - The various regular-expression functions (from different systems:
|
|
* regcmp vs. re_comp) behave differently in the presence of
|
|
* parentheses (which are almost always found in a tag).
|
|
*/
|
|
public int
|
|
tagsearch(void)
|
|
{
|
|
POSITION pos, linepos;
|
|
int linenum;
|
|
char *line;
|
|
|
|
pos = ch_zero();
|
|
linenum = find_linenum(pos);
|
|
|
|
for (;;)
|
|
{
|
|
/*
|
|
* Get lines until we find a matching one or
|
|
* until we hit end-of-file.
|
|
*/
|
|
if (sigs)
|
|
return (1);
|
|
|
|
/*
|
|
* Read the next line, and save the
|
|
* starting position of that line in linepos.
|
|
*/
|
|
linepos = pos;
|
|
pos = forw_raw_line(pos, &line);
|
|
if (linenum != 0)
|
|
linenum++;
|
|
|
|
if (pos == NULL_POSITION)
|
|
{
|
|
/*
|
|
* We hit EOF without a match.
|
|
*/
|
|
error("Tag not found", NULL_PARG);
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* If we're using line numbers, we might as well
|
|
* remember the information we have now (the position
|
|
* and line number of the current line).
|
|
*/
|
|
if (linenums)
|
|
add_lnum(linenum, pos);
|
|
|
|
/*
|
|
* Test the line to see if we have a match.
|
|
* Use strncmp because the pattern may be
|
|
* truncated (in the tags file) if it is too long.
|
|
*/
|
|
if (strncmp(tagpattern, line, strlen(tagpattern)) == 0)
|
|
break;
|
|
}
|
|
|
|
jump_loc(linepos, jump_sline);
|
|
return (0);
|
|
}
|
|
|
|
#endif
|