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#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <mntent.h>
#include "internal.h"
#ifndef strndup
static char *rccStrndup(const char *str, size_t n) {
char *res;
n = STRNLEN(str, n);
res = (char*)malloc((n+1)*sizeof(char));
if (!res) return res;
strncpy(res, str, n);
res[n] = 0;
return res;
}
#define strndup rccStrndup
#endif /* !strndup */
static char *rccCreateFullName(const char *path, const char *filename) {
unsigned int i;
char *name;
if (!path) {
if (filename) return strdup(filename);
else return strdup("/");
} else if (!filename) return strdup(path);
i = strlen(path);
name = (char*)malloc((i+strlen(filename)+2)*sizeof(char));
if (!name) return NULL;
if ((path[i-1]=='/')||(filename[0]=='/'))
sprintf(name, "%s%s", path, filename);
else
sprintf(name, "%s/%s", path, filename);
return name;
}
static int rccIsFile(const char *filename) {
struct stat st;
stat(filename,&st);
if (S_ISREG(st.st_mode)) return 1;
return 0;
}
static char *rccCheckFile(const char *prefix, const char *name) {
char *temp;
temp = rccCreateFullName(prefix, name);
if ((!temp)||(rccIsFile(temp))) return temp;
free(temp);
return NULL;
}
/* Converts: 'filename' to 'prefix/name' using 'fspath' */
int rccFS0(const char *fspath, const char *filename, char **prefix, char **name) {
FILE *mtab;
struct mntent *fsentry;
const char *tmp;
if (fspath) {
tmp = strstr(filename, fspath);
if (tmp) tmp = filename + strlen(fspath);
} else {
mtab = setmntent(_PATH_MNTTAB, "r");
if (mtab) {
while (!feof(mtab)) {
fsentry = getmntent(mtab);
if ((fsentry)&&(fsentry->mnt_dir)) {
tmp = strstr(filename, fsentry->mnt_dir);
if (tmp) tmp = filename + strlen(fsentry->mnt_dir);
}
}
endmntent(mtab);
}
}
if (!tmp) tmp = filename;
*name = strdup(tmp);
*prefix = strndup(filename, (tmp-filename));
if ((!*name)||(!*prefix)) {
if (*name) free(*name);
if (*prefix) free(*prefix);
return -1;
}
return 0;
}
/* Normalizes 'prefix/name' using 'fspath' */
int rccFS1(rcc_context ctx, const char *fspath, char **prefix, char **name) {
int err;
int prefix_size;
char *result, *tmp;
char *path, *filename;
path = *prefix;
filename = *name;
if ((path)&&(filename)) {
result = rccCreateFullName(path, filename);
if (!result) return -1;
} else if (filename) result = filename;
else if (path) result = path;
else return -1;
// Checking without recoding in case of autodetection
if (rccGetOption(ctx, RCC_AUTODETECT_FS_NAMES)) {
if (rccIsFile(result)) {
if ((path)&&(filename)) *name = result;
else if (filename) *name = strdup(filename);
else *name = strdup(path);
return 1;
}
}
err = rccFS0(fspath, result, prefix, name);
if ((path)&&(filename)) free(name);
return err;
}
/* Checks if 'prefix/name' is accessible using 'icnv' recoding. In case of
sucess returns pointer on statically allocated memory, and NULL overwise */
const char *rccFS2(rcc_context ctx, iconv_t icnv, const char *prefix, const char *name) {
int err;
if (icnv == (iconv_t)-1) return NULL;
if (icnv == (iconv_t)-2) {
strcpy(ctx->tmpbuffer, name);
} else {
err = rccIConv(ctx, icnv, name, 0);
if (err<=0) return NULL;
}
return rccCheckFile(prefix, ctx->tmpbuffer);
}
/* Tries to find 'name' encoding in 'prefix/name' file. Returns pointer on
statically allocated string with correct filename or NULL. */
const char *rccFS3(rcc_context ctx, rcc_language_id language_id, rcc_class_id class_id, const char *prefix, const char *name) {
unsigned int i;
const char *result;
rcc_charset charset;
rcc_language *language;
iconv_t icnv = ctx->fsiconv;
if ((rccGetOption(ctx, RCC_AUTODETECT_FS_NAMES))&&(icnv != (iconv_t)-1)) {
result = rccFS2(ctx, icnv, prefix, name);
if (result) return result;
}
result = rccFS2(ctx, ctx->iconv_to[class_id], prefix, name);
if (result) {
if ((icnv != (iconv_t)-1)||(icnv != (iconv_t)-2)) iconv_close(icnv);
ctx->fsiconv = (iconv_t)-1;
return result;
}
if (rccGetOption(ctx, RCC_AUTODETECT_FS_NAMES)) {
language = ctx->languages[language_id];
if (language->charsets[0]) {
for (i=1;(!result);i++) {
charset = language->charsets[i];
if (!charset) break;
if ((icnv != (iconv_t)-1)&&(icnv != (iconv_t)-2)) iconv_close(icnv);
if (strcmp(charset, "UTF-8")&&strcmp(charset, "UTF8")) icnv = (iconv_t)-2;
else icnv = iconv_open(charset, "UTF-8");
result = rccFS2(ctx, icnv, prefix, name);
}
}
}
if (result) ctx->fsiconv = icnv;
else {
if ((icnv != (iconv_t)-1)&&(icnv != (iconv_t)-2)) iconv_close(icnv);
ctx->fsiconv = (iconv_t)-1;
}
return result;
}
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