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#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
#include <string.h>
#include <ctype.h>
#include "support.h"
#include "ossupport.h"
/* Zero terminate the current word. Returns -1 is *s == 0 or the next word
does not exist. Otherwise returns offset to the beginning of next word. */
int skip_and_terminate_word(char *s, int i)
{
i = skipnws(s, i);
if (i < 0)
return -1;
/* Zero terminate word */
s[i] = 0;
i = skipws(s, i + 1);
if (i < 0)
return -1;
return i;
}
char *xbasename(const char *s)
{
char *t = strrchr(s, (int) '/');
if (t == NULL) {
t = (char *) s;
} else {
t++;
}
return t;
}
/*
* Split a string into 2 whitespace separated fields returned in "key" and
* "value". If more than 2 fields are found, they are cut off by zero
* terminating "key" and "value" inside the string. If "value" is not found,
* *value is set to NULL. If "key" is not found, *key is set to NULL.
* If something is found, both *key and *value become pointers inside the
* string s.
*
* Return values:
* - 0 if neither "key" nor "value" is found
* - 1 if only "key" is found
* - 2 if both "key" and "value" are found
*/
int get_two_ws_separated_fields(char **key, char **value, char *s)
{
int i;
*key = NULL;
*value = NULL;
i = skipws(s, 0); /* Skip initial whitespace */
if (i < 0)
return 0; /* We got nothing */
*key = s + i;
i = skip_and_terminate_word(s, i);
if (i < 0)
return 1; /* We got a "key", but not a "value" */
*value = s + i;
skip_and_terminate_word(s, i);
return 2; /* We got both a "key" and a "value" */
}
/*
* Skip whitespace characters in string starting from offset i. Returns offset
* j >= i as the next non-whitespace character offset, or -1 if non-whitespace
* are not found.
*/
int skipws(const char *s, int i)
{
while (isspace(s[i]))
i++;
if (s[i] == 0)
return -1;
return i;
}
/*
* Skip non-whitespace characters in string starting from offset i. Returns
* offset j >= i as the next whitespace character offset, or -1 if no
* whitespace if found.
*/
int skipnws(const char *s, int i)
{
while (!isspace(s[i]) && s[i] != 0)
i++;
if (s[i] == 0)
return -1;
return i;
}
/* Split line with respect to white space. */
char **read_and_split_lines(size_t *nitems, size_t *lineno, FILE *f,
const char *delim)
{
char line[UADE_LINESIZE], templine[UADE_LINESIZE];
char **items = NULL;
size_t pos;
char *sp, *s;
*nitems = 0;
while (xfgets(line, sizeof line, f) != NULL) {
if (lineno != NULL)
(*lineno)++;
/* Skip, if a comment line */
if (line[0] == '#')
continue;
/* strsep() modifies line that it touches, so we make a copy
of it, and then count the number of items on the line */
strlcpy(templine, line, sizeof(templine));
sp = templine;
while ((s = strsep(&sp, delim)) != NULL) {
if (*s == 0)
continue;
(*nitems)++;
}
if (*nitems > 0)
break;
}
if (*nitems == 0)
return NULL;
if ((items = malloc(sizeof(items[0]) * (*nitems + 1))) == NULL)
uadeerror("No memory for nws items.\n");
sp = line;
pos = 0;
while ((s = strsep(&sp, delim)) != NULL) {
if (*s == 0)
continue;
if ((items[pos] = strdup(s)) == NULL)
uadeerror("No memory for an nws item.\n");
pos++;
}
items[pos] = NULL;
assert(pos == *nitems);
return items;
}
char *xfgets(char *s, int size, FILE *stream)
{
char *ret;
while (1) {
ret = fgets(s, size, stream);
if (ret != NULL)
break;
if (feof(stream))
break;
}
return ret;
}
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