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/*
* buildpath.c
*
* By Ross Ridge
* Public Domain
* 92/02/01 07:29:42
*
* _buildpath builds a list of file names and terminal descriprions extracted
* from its arguments. It returns a pointer to a structure that is used by
* other routines as the list of file names to search for terminal
* descriptions. It is passed a variable number of arguments consisting
* of file name and type pairs. The file name can actually be a list of
* file names seperated by spaces and any environment variables specified
* by a dollar sign ($) followed by its name are substituted in. A type
* of 1 indicates that the file name may actually be termcap description
* and a type of 2 indicates it may be a terminfo description. A type of 0
* indicates that the file name can only be a file name (or list of them).
*
*/
#include "defs.h"
#include <ctype.h>
#ifdef USE_SCCS_IDS
static const char SCCSid[] = "@(#) mytinfo buildpath.c 3.2 92/02/01 public domain, By Ross Ridge";
#endif
/* more memory is allocated for file names every HUNK file names */
#define HUNK 32
/* characters that seperate file names in a list */
#define SEPERATORS " :"
static struct term_path *path = NULL; /* the list of files */
static int files = 0; /* # of files in the list */
static int size = 0; /* # of files there is space for */
/* add a file name, type pair to the list */
static int
addfile(file, type)
char *file;
int type; {
int l;
char *s;
if (file == NULL) {
if (type != -1)
return -1;
} else if (file[0] == '\0')
return -1;
#ifdef DEBUG
if (file != NULL)
printf("addfile: %s\n", file);
#endif
if (files >= size) {
size += HUNK;
path = (struct term_path *) reallocf((anyptr) path,
size * sizeof(struct term_path));
if (path == NULL)
return 0;
}
if (file == NULL) {
path[files].file = file;
} else {
l = strlen(file) + 1;
s = (char *) malloc(l * sizeof(char));
if (s == NULL)
return 0;
path[files].file = strcpy(s, file);
}
path[files].type = type;
return ++files;
}
/* deallocate space used by the path list */
void
_delpath(ppath)
struct term_path *ppath; {
struct term_path *p;
p = ppath;
while(p->file != NULL) {
free((anyptr)p->file);
p++;
}
free((anyptr)ppath);
}
/* build a list of paths. see above */
#ifdef lint
/*VARARGS2*/
struct term_path *
_buildpath(file, type)
char *file;
int type;
#else
#ifdef USE_STDARG
#ifdef USE_PROTOTYPES
struct term_path *_buildpath(char *file, int type, ...)
#else
struct term_path *_buildpath(file, type)
char *file;
int type;
#endif /* USE_PROTOTYPES */
#else /* USE_STDARG */
struct term_path *_buildpath(va_alist)
va_dcl
#endif /* USE_STDARG */
#endif /* lint */
{
#ifndef lint
#ifndef USE_STDARG
char *file;
int type;
#endif
#endif
va_list ap;
register char *s, *d, *e;
char *p;
char line[MAX_BUF+1];
char name[MAX_NAME+1];
int i,j;
size = 0;
files = 0;
path = NULL;
#ifdef lint
ap = NULL;
#else
#ifdef USE_STDARG
va_start(ap, type);
#else
va_start(ap);
file = va_arg(ap, char *);
type = va_arg(ap, int);
#endif
#endif
while (type >= 0 && type <= 2) {
s = file;
d = line;
i = 0;
while(*s != '\0') {
if (*s == '$') {
s++;
j = 0;
while(*s != '\0' && (*s == '_' || isalnum(*s)))
if (j < MAX_NAME) {
name[j] = *s++;
j++;
} else
break;
name[j] = '\0';
e = getenv(name);
if (e != NULL) {
while(*e != '\0') {
if (i < MAX_BUF) {
*d++ = *e++;
i++;
} else
break;
}
} else if (*s == '/')
s++;
} else {
if (i < MAX_BUF) {
*d++ = *s++;
i++;
} else
break;
}
}
*d = '\0';
if (type == 0 || line[0] == '/') {
p = line;
while ((s = strsep(&p, SEPERATORS)) != NULL && *s == '\0')
;
while(s != NULL) {
if (addfile(s, 0) == 0)
return NULL;
while ((s = strsep(&p, SEPERATORS)) != NULL && *s == '\0')
;
}
} else
if (addfile(line, type) == 0)
return NULL;
file = va_arg(ap, char *);
type = va_arg(ap, int);
}
addfile(NULL, -1);
return path;
}
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