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#pragma once
#include <stdio.h>
#include <stdlib.h>
#include <dirent.h>
#include <string.h>
#include <mkdirp.c>
#include <fopenmkdir.c>
#include <limits.h>
#include <randstring.c>
#define BVR_MAX_VARIABLE_SIZE 128
#define BVR_INITIAL_VARIABLES_COUNT 128
#define SUCCESS 0
#define FAILURE -1
#define COPY_BUFFER_SIZE 2
#define OPENING_COMMAND_TAG_LENGTH 2
#define OPENING_COMMAND_TAG_CHAR_1 '<'
#define OPENING_COMMAND_TAG_CHAR_2 '@'
#define CLOSING_COMMAND_TAG_CHAR_1 '@'
#define CLOSING_COMMAND_TAG_CHAR_2 '>'
char bvr_variables[BVR_INITIAL_VARIABLES_COUNT][BVR_MAX_VARIABLE_SIZE];
// char* bvr_variables[128] = malloc(BVR_INITIAL_VARIABLES_COUNT * BVR_MAX_VARIABLE_SIZE);
int bvr_variables_multiplier = 1;
// int bvr_increase_variables() { // this can be costly https://stackoverflow.com/a/3827922
// char* more_variables = realloc(bvr_variables, ++bvr_variables_multiplier * BVR_INITIAL_VARIABLES_COUNT * sizeof(BVR_MAX_VARIABLE_SIZE));
// if (!more_variables) {
// printf("[tape.c] bvr_increase_variables: unable to increase variables count. Program will continue, but may run out of variable space and fail\n");
// bvr_variables_multiplier = bvr_variables_multiplier - 1;
// return FAILURE;
// }
// return SUCCESS;
// }
int bvr_command_processor(FILE * page_source_file, FILE * temp_output_file, char copy_buffer[]) {
for(int i = 1; i <= OPENING_COMMAND_TAG_LENGTH; i++) {
copy_buffer[ftell(page_source_file)% COPY_BUFFER_SIZE] = fgetc(page_source_file); // remove opening command tag characters
}
while(copy_buffer[(ftell(page_source_file)-1)% COPY_BUFFER_SIZE] != CLOSING_COMMAND_TAG_CHAR_1 || copy_buffer[ftell(page_source_file)% COPY_BUFFER_SIZE] != CLOSING_COMMAND_TAG_CHAR_2) {
copy_buffer[(ftell(page_source_file))% COPY_BUFFER_SIZE] = fgetc(page_source_file); // advance file pointer to the end of command without rewriting.
fputc('a', temp_output_file);
if(copy_buffer[(ftell(page_source_file)-1)% COPY_BUFFER_SIZE] == EOF) {
fprintf(temp_output_file, "\nbVerbose syntax error: EOF reached before closing command tag --- stopped with this bvr file\n");
fprintf(stderr, "[tape.c] bvr_command_processor: syntax error: EOF reached before @> --- stopped with this bvr file\n");
return FAILURE;
}
}
copy_buffer[ftell(page_source_file)% COPY_BUFFER_SIZE] = fgetc(page_source_file); // remove closing command tag character
return SUCCESS;
}
int bvr_compose_page(char page_source_file_path[], int this_is_a_top_level_page, char * temp_output_path) {
if(temp_output_path != NULL) {
char * temp_output_filename = randstring(16);
char temp_output_path[80] = "tmp/";
strcat(temp_output_path, temp_output_filename);
}
char copy_buffer[COPY_BUFFER_SIZE];
FILE * temp_output_file = fopen_mkdir(temp_output_path, "w");
FILE * page_source_file = fopen(page_source_file_path, "r");
for(int i = 0; i < sizeof(copy_buffer); i++) { // da garbage vrednosti ne bodo slučajno ukazi!
copy_buffer[i] = ' ';
}
copy_buffer[ftell(page_source_file)% COPY_BUFFER_SIZE] = fgetc(page_source_file);
if(copy_buffer[ftell(page_source_file)% COPY_BUFFER_SIZE] == EOF) {
goto done_reading_write_file;
}
while (1) {
copy_buffer[ftell(page_source_file)% COPY_BUFFER_SIZE] = fgetc(page_source_file);
if(copy_buffer[(ftell(page_source_file)-1)% COPY_BUFFER_SIZE] == OPENING_COMMAND_TAG_CHAR_1 && copy_buffer[ftell(page_source_file)% COPY_BUFFER_SIZE] == OPENING_COMMAND_TAG_CHAR_2) {
if(bvr_command_processor(page_source_file, temp_output_file, copy_buffer)) {
fprintf(temp_output_file, "\nbvr_command_processor returned an error status whilst composing %s\n", page_source_file_path);
}
} else {
if(copy_buffer[ftell(page_source_file)% COPY_BUFFER_SIZE] == EOF) {
break;
}
fputc(copy_buffer[(ftell(page_source_file)-1)% COPY_BUFFER_SIZE], temp_output_file);
}
}
done_reading_write_file:
if(this_is_a_top_level_page) {
char folder_of_file[PATH_MAX];
strcpy(folder_of_file, page_source_file_path);
char * p;
p = strrchr(folder_of_file, '/');
if (!p) {
printf("[fopenmkdir.c] filename contains no slash.\n");
return FAILURE;
} else {
*p = '\0';
}
char *type_of_page = strrchr(folder_of_file, '/');
if (type_of_page == NULL) {
printf("[tape.c] bvr_compose_page: folder of file contains no slash, hope %s is a page category.", folder_of_file);
type_of_page = folder_of_file;
} else {
type_of_page++;
}
// type_of_page+1 is a page category (skip delimeter pointer.)
}
return SUCCESS;
}
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