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#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "yxmllib.h"
#define BUFSIZE 8096
typedef struct buffer {
int len;
char *buffer;
} buffer;
buffer *buffer_new() {
buffer *buf = malloc(sizeof(buffer));
buf->buffer = malloc(BUFSIZE);
if (!buf || !buf->buffer) {
fprintf(stderr, "Could not allocate memory for buffer struct.\n");
exit(1);
}
buf->len = 0;
return buf;
}
buffer *buffer_reset(buffer *buf) {
buf->buffer = memset(buf->buffer, 0, BUFSIZE);
buf->len = 0;
return buf;
}
buffer *buffer_append(buffer *buf, char *data) {
for (int i = 0; data[i]; i++) {
buf->buffer[buf->len] = data[i];
buf->len++;
}
return buf;
}
int process(char *fn, yxml_t *state) {
size_t filelen;
char *parsebuffer;
int inelement;
buffer *contentbuf;
FILE* f = fopen(fn, "rb");
if (!f) {
fprintf(stderr, "Could not open %s.", fn);
perror("Error:");
return 1;
}
// get file size
fseek(f, 0L, SEEK_END);
filelen = ftell(f);
rewind(f);
parsebuffer = calloc(1, filelen+1);
if (!parsebuffer) {
fprintf(stderr, "Could not allocate memory for file %s.\n", fn);
fclose(f);
return 1;
}
if (fread(parsebuffer, filelen, 1 , f) != 1) {
fprintf(stderr, "Could not read file into memory for file %s.\n", fn);
free(parsebuffer);
fclose(f);
return 1;
}
fclose(f);
inelement = 0;
contentbuf = buffer_new();
yxml_init(state, state+1, BUFSIZE);
for (; *parsebuffer; parsebuffer++) {
yxml_ret_t r = yxml_parse(state, *parsebuffer);
//fprintf(stderr, "parse_state: %d\n", r);
if(r < 0) {
printf("Parsing error at %s: line %u, byte %lu, offset %lu\n",
fn, state->line, state->byte, state->total);
return 1;
}
switch(r) {
case YXML_ELEMSTART:
if (!strcmp(state->elem, "article-title")) {
inelement = 1;
}
break;
case YXML_CONTENT:
if (inelement) {
buffer_append(contentbuf, state->data);
}
break;
case YXML_ELEMEND:
if (strcmp(state->elem, "article-title")) {
break;
}
inelement = 0;
printf("%s\n", contentbuf->buffer);
buffer_reset(contentbuf);
break;
}
}
return 0;
}
int main(int argc, char *argv[]) {
yxml_t *state = malloc(sizeof(yxml_t) + BUFSIZE);
for (int i = 1; i < argc; i++) {
process(argv[i], state);
}
return 0;
}
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