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#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
char * alloc_concat(char * first, char * second)
{
int flen = strlen(first);
int slen = strlen(second);
char * ret = malloc(flen + slen + 1);
memcpy(ret, first, flen);
memcpy(ret+flen, second, slen+1);
return ret;
}
char * alloc_concat_m(int num_parts, char ** parts)
{
int total = 0;
for (int i = 0; i < num_parts; i++) {
total += strlen(parts[i]);
}
char * ret = malloc(total + 1);
*ret = 0;
for (int i = 0; i < num_parts; i++) {
strcat(ret, parts[i]);
}
return ret;
}
long file_size(FILE * f)
{
fseek(f, 0, SEEK_END);
long fsize = ftell(f);
fseek(f, 0, SEEK_SET);
return fsize;
}
char * strip_ws(char * text)
{
while (*text && (!isprint(*text) || isblank(*text)))
{
text++;
}
char * ret = text;
text = ret + strlen(ret) - 1;
while (text > ret && (!isprint(*text) || isblank(*text)))
{
*text = 0;
text--;
}
return ret;
}
char * split_keyval(char * text)
{
while (*text && !isblank(*text))
{
text++;
}
if (!*text) {
return text;
}
*text = 0;
return text+1;
}
static char * exe_str;
void set_exe_str(char * str)
{
exe_str = str;
}
char * readlink_alloc(char * path)
{
char * linktext = NULL;
ssize_t linksize = 512;
ssize_t cursize = 0;
do {
if (linksize > cursize) {
cursize = linksize;
if (linktext) {
free(linktext);
}
}
linktext = malloc(cursize);
linksize = readlink(path, linktext, cursize-1);
if (linksize == -1) {
perror("readlink");
free(linktext);
linktext = NULL;
}
} while ((linksize+1) > cursize);
linktext[linksize] = 0;
return linktext;
}
char * get_exe_dir()
{
static char * exe_dir;
if (!exe_dir) {
char * linktext = readlink_alloc("/proc/self/exe");
if (!linktext) {
goto fallback;
}
char * cur;
int linksize = strlen(linktext);
for(cur = linktext + linksize - 1; cur != linktext; cur--)
{
if (*cur == '/') {
*cur = 0;
break;
}
}
if (cur == linktext) {
free(linktext);
fallback:
if (!exe_str) {
fputs("/proc/self/exe is not available and set_exe_str was not called!", stderr);
}
int pathsize = strlen(exe_str);
for(cur = exe_str + pathsize - 1; cur != exe_str; cur--)
{
if (*cur == '/') {
exe_dir = malloc(cur-exe_str+1);
memcpy(exe_dir, exe_str, cur-exe_str);
exe_dir[cur-exe_str] = 0;
break;
}
}
} else {
exe_dir = linktext;
}
}
return exe_dir;
}
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