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authorAnton L. Šijanec <anton@sijanec.eu>2020-05-01 15:18:12 +0200
committerAnton L. Šijanec <anton@sijanec.eu>2020-05-01 15:18:12 +0200
commit6961e4237f24306ab2475f4f527a7c802134c4d9 (patch)
tree0d18e9dd78fe3dee482872a65fbf823e00cd31db /src/tape.c
parentfolder structure README.mf (diff)
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Diffstat (limited to 'src/tape.c')
-rw-r--r--src/tape.c101
1 files changed, 101 insertions, 0 deletions
diff --git a/src/tape.c b/src/tape.c
index 8f09ba6..4cda521 100644
--- a/src/tape.c
+++ b/src/tape.c
@@ -1,6 +1,107 @@
+#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;
+}