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#include <stdlib.h>
#include <string.h>
#include "xml.h"
static char *gettag(char *xml, int *pos);
static char *getvalue(char *xml, int *pos);
// TODO: make this smaller
map_t *decode(char *xml, int *pos, int *len)
{
if (*len)
++(*len);
else
*len = 1;
map_t *decoded = calloc(1, sizeof(map_t));
int err = 0, closed = 1;
for (int i = *pos; i < strlen(xml); ++i) {
if (!strncmp(xml + i, "</", 2)) {
i += 2;
char *tmp = gettag(xml, &i);
if (!strcmp(decoded->tag, tmp))
*pos = i;
else
err = 1;
free(tmp);
goto end;
} else if (xml[i] == '<' && closed) {
++i;
decoded->tag = gettag(xml, &i);
closed = 0;
} else if (xml[i] == '<' && !closed) {
map_t *ndec = decode(xml, &i, &(decoded->n));
decoded->size = sizeof(map_t);
if (decoded->n > 1)
decoded->payload = realloc(decoded->payload, decoded->n * sizeof(map_t));
else
decoded->payload = calloc(1, sizeof(map_t));
((map_t *) decoded->payload)[decoded->n - 1] = *ndec;
free(ndec);
} else {
decoded->payload = getvalue(xml, &i);
decoded->size = sizeof(char);
decoded->n = strlen(decoded->payload);
}
}
end:
if (err) {
free(decoded);
decoded = NULL;
}
return decoded;
}
static char *gettag(char *xml, int *pos)
{
int len, i;
for (i = *pos, len = 0; xml[i] != '>'; ++i, ++len) ;
char *title = calloc(len + 1, sizeof(char));
strncpy(title, xml + *pos, len);
*pos += len;
return title;
}
static char *getvalue(char *xml, int *pos)
{
int len, i;
for (i = *pos, len = 0; xml[i] != '<'; ++i, ++len) ;
char *value = calloc(len + 1, sizeof(char));
strncpy(value, xml + *pos, len);
*pos += len - 1;
return value;
}
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