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/* FILE: filenames.c
* PURPOSE: some handy functions for working with TeXfiles
* AUTHOR: Piet Tutelaers (internet: rcpt@urc.tue.nl)
* VERSION: 1.3 (August 1992)
* VERSION: 1.4 (January 1994)
* VERSION: 1.5 (September 1995)
*/
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#ifdef KPATHSEA
#include <kpathsea/kpathsea.h>
#include <c-auto.h>
#endif
#include "basics.h" /* basic definitions and fatal() */
/* for those systems that don't provide an ANSI strchr() */
static char *charptr(char *name, char c)
{
while (*name != c && *name != '\0') name++;
if (*name == '\0') return NULL;
else return name;
}
/* comparing names (system dependant) */
int equal(char *s, char *t)
{
# ifndef UNIX
while (tolower(*s) == tolower(*t)) {
if (*s == '\0') break;
s++; t++;
}
# else
while (*s == *t) {
if (*s == '\0' || *t == '\0') break;
s++; t++;
}
# endif
if (*s == '\0' && *t == '\0') return 1;
else return 0;
}
/*
* Determine the extension
*/
char *extension(char *str) {
char *p, *base;
for (p = base = str; *p; ++p)
/* if (*p++ == DIRSEP) base = p; */
if (IS_DIR_SEP(*p)) base = p + 1;
for (p = base ; *p; p++)
if (*p == '.') break;
return p;
}
/*
* Construct filename by replacing the current extension (if available)
* with supplied one.
*/
char *newname(char *name, char *ext)
{
char *e, *nn; int len1, len2;
e = extension(name);
if (equal(ext, e)) return name;
len1 = strlen(name) - strlen(e);
len2 = len1 + strlen(ext) + 1;
nn = (char *) malloc(len2);
if (nn == NULL) fatal("Out of memory\n");
strncpy(nn, name, len1);
strcpy(nn+len1, ext);
return nn;
}
/*
* Derived from BSD basename
*/
char *basename(char *str, char *suffix){
char *p, *t; int len = 0;
char *base;
printf("basename of %s = ", str);
#ifdef KPATHSEA
for (p = base = (NAME_BEGINS_WITH_DEVICE(str) ? str+2 : str);
*p; p++) {
#else
for (p = base = str; *p; p++) {
#endif
/* if (*p++ == DIRSEP) { base = p; len = 0; } */
if (IS_DIR_SEP(*p)) { base = p+1; len = 0; }
else len++;
}
printf("%s\n", base);
if (suffix != NULL) {
for (t = suffix; *t; ++t);
do {
len--; t--; p--;
if (*t != *p) break;
if (t == suffix) { char *bn;
if (len == 0) return NULL;
bn = malloc(len+1);
if (bn == NULL) fatal("Out of memory\n");
strncpy(bn, base, len);
*(bn+len) = '\0'; /* RA */
return bn;
}
} while (p > base);
}
return base;
}
/*
* Return true if name can be the name of a PostScript resource
* (no extension and no absolute pathname).
*/
int ps_resource(char *name) {
if (charptr(name, '.')) return 0 ;
#ifdef KPATHSEA
if (kpse_absolute_p(name, true)) return 0;
#else
if (charptr(name, DIRSEP)) return 0 ;
#endif
return 1;
}
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