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#include <stdlib.h>
#include <ctype.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <libgen.h>
#include "precedent.h"
#include "hashtable.h"
#include "parse.h"
#include "eval.h"
int main(int argc, char** argv) {
clock_t initTime = clock();
int visual = 0;
int debug = 0;
if (argc > 1) {
for (int i = 1; i < argc; i++) {
if (strcmp("--version", argv[i]) == 0) {
printf("precedent, version 0.1\n");
printf("Copyright 2023 Kai Stevenson\n");
printf("All rights reserved. No part of the software may be sold\nor used in derivative works without explicit consent\n");
return 0;
}
else if (strcmp("--help", argv[i]) == 0) {
printf("usage: precedent <file> [--visualize] [--debug] [--version] [--help]\n");
return 0;
}
else if (strcmp("--visualize", argv[i]) == 0) {
visual = 1;
}
else if (strcmp("--debug", argv[i]) == 0) {
debug = 1;
}
}
}
else {
printf("usage: precedent <file> [--visualize] [--version] [--help]\n");
return 0;
}
/* dirname may modify path, copy first */
char* path = argv[1];
char* pathCpy = malloc((strlen(path) + 1) * sizeof(char));
strcpy(pathCpy, path);
char* dirName = dirname(pathCpy);
char* baseDir = malloc((strlen(dirName) + 2) * sizeof(char));
strcpy(baseDir, dirName);
strcat(baseDir, "/");
hashtable_t* includeTable = init_hashtable(500, NULL);
char* baseContent = read_file(path);
char* finalContent = preprocess(baseContent, baseDir, includeTable);
destroy_hashtable(includeTable);
/* TODO: write hashtable information if debug */
sym_t* finalSymbol = parse_symbol_final(finalContent);
free(pathCpy);
free(baseDir);
free(finalContent);
if (visual) {
printf("--BEGIN VISUALIZATION--\n");
write_symbol_visual(finalSymbol, 0);
printf("--END VISUALIZATION--\n");
}
hashtable_t* rootTable = init_hashtable(500, NULL);
clock_t setupTime = clock();
sym_t* sym = eval(finalSymbol, rootTable);
clock_t evalTime = clock();
if (debug) {
printf("time taken to set up environment: %.5f secs\n", (float)(setupTime - initTime) / (float)CLOCKS_PER_SEC);
printf("time taken to execute program: %.5f secs\n", ((float)(evalTime - setupTime) - initTime) / (float)CLOCKS_PER_SEC);
}
destroy_sym_tree(finalSymbol);
destroy_sym(sym);
destroy_hashtable(rootTable);
return 0;
}
char* read_file(char* path) {
FILE* file = fopen(path, "r");
if (file == NULL) {
printf("file %s does not exist\n", path);
}
fseek(file, 0, SEEK_END);
unsigned long int length = ftell(file);
fseek(file, 0, SEEK_SET);
char* out = malloc((length + 1) * sizeof(char));
fread(out, length, 1, file);
fclose(file);
out[length] = '\0';
return out;
}
char* preprocess(char* str, char* baseDir, hashtable_t* includeHt) {
while (1) {
int i = 0;
while (str[i] != '@' && str[i] != '&') {
i++;
if (str[i] == '\0') {
return str;
}
}
char alwaysInclude = 0;
/* include even if already included */
if (str[i] == '&') {
alwaysInclude = 1;
}
str[i] = ' ';
i++;
char* includeName = malloc(40 * sizeof(char));
int f = 0;
while (isalnum((unsigned char)str[i]) || str[i] == '/' || str[i] == '.' || str[i] == '_') {
includeName[f] = str[i];
str[i] = ' ';
i++;
f++;
}
includeName[f] = '\0';
char* path = malloc((strlen(baseDir) + strlen(includeName) + 1) * sizeof(char));
strcpy(path, baseDir);
strcat(path, includeName);
char* fileContent = read_file(path);
/* ensure the file has not already been included */
char notIncluded = hashtable_get_pair(includeHt, fileContent).key == NULL;
if (notIncluded) {
hashtable_add_pair(includeHt, init_pair(fileContent, NULL));
}
if (notIncluded || alwaysInclude) {
/* TODO: fix relative paths */
char* toInclude = preprocess(fileContent, baseDir, includeHt);
char* newStr = malloc((strlen(toInclude) + strlen(str) + 1) * sizeof(char));
strcpy(newStr, toInclude);
strcat(newStr, str);
free(str);
free(toInclude);
str = newStr;
}
else {
free(fileContent);
}
free(includeName);
free(path);
}
}
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