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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() {
// allocate struct and buffer in one go
buffer *buf = malloc(sizeof(buffer)+BUFSIZE);
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) {
int i;
for (i = buf->len; data; i++) {
buf->buffer[i] = data[i];
}
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();
if (!contentbuf) {
fprintf(stderr, "Could not allocate memory for the element content buffer.\n");
fclose(f);
return 1;
}
for (; *parsebuffer; parsebuffer++) {
yxml_init(state, state+1, BUFSIZE);
yxml_ret_t r = yxml_parse(state, *parsebuffer);
if(r < 0) {
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")) {
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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