roxml_file.c

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#include <stdlib.h>
#include <string.h>
#include "roxml_core.h"
#include "roxml_parser.h"
#include "roxml_internal.h"

ROXML_INT int roxml_read_file(int pos, int size, char *buffer, node_t *node)
{
        int ret_len = 0;

        if (fseek(node->src.fil, pos, SEEK_SET) == 0)
                ret_len = fread(buffer, 1, size, node->src.fil);

        return ret_len;
}

ROXML_INT void roxml_close_file(node_t *root)
{
        fclose(root->src.fil);
}

ROXML_INT int roxml_parse_file(roxml_load_ctx_t *context, roxml_parser_item_t *parser, FILE *file)
{
        char *int_buffer;
        int error = 0;
        int circle = 0;
        int int_len = 0;

        context->type = ROXML_FILE;
        context->src = (void *)file;
        context->pos = 0;

        int_buffer = malloc(ROXML_BULK_READ + 1);

        do {
                int ret = 0;
                int chunk_len = 0;
                int_len = fread(int_buffer + circle, 1, ROXML_BULK_READ - circle, file) + circle;
                int_buffer[int_len] = '\0';

                if (int_len == ROXML_BULK_READ)
                        chunk_len = int_len - ROXML_BASE_LEN;
                else
                        chunk_len = int_len;

                ret = roxml_parse_line(parser, int_buffer, chunk_len, context);
                circle = int_len - ret;
                if ((ret < 0) || (circle < 0)) {
                        error = 1;
                        break;
                }
                memmove(int_buffer, int_buffer + ret, circle);
        } while (int_len == ROXML_BULK_READ);

        free(int_buffer);

        if (error == 0 && context->lvl != 0)
                ROXML_PARSE_ERROR("mismatch in open/close nodes");
        return error;
}

ROXML_API node_t *roxml_load_fd(int fd)
{
        FILE *file = NULL;
        node_t *current_node = NULL;

        if (fd < 0)
                return NULL;

        file = fdopen(fd, "r");
        if (file == NULL)
                return ROXML_INVALID_DOC;

        current_node = roxml_create_node(0, file, ROXML_ELM_NODE | ROXML_FILE);

        return roxml_load(current_node, file, NULL);
}

ROXML_API node_t *roxml_load_doc(char *filename)
{
        node_t *current_node = NULL;
        FILE *file = fopen(filename, "rb");

        if (file == NULL)
                return ROXML_INVALID_DOC;

        current_node = roxml_create_node(0, file, ROXML_ELM_NODE | ROXML_FILE);

        return roxml_load(current_node, file, NULL);
}