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main.cpp
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176 lines (160 loc) · 4.73 KB
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// This file is part of SmallBASIC
//
// This program is distributed under the terms of the GPL v2.0 or later
// Download the GNU Public License (GPL) from www.gnu.org
//
// Copyright(C) 2021 Chris Warren-Smith
#include "config.h"
#include <sys/stat.h>
#include <cstring>
#include <cstdlib>
#include <cstdio>
#include "include/var.h"
#include "include/module.h"
#include "include/param.h"
char *programSource = nullptr;
uint32_t modifiedTime;
uint32_t get_modified_time() {
uint32_t result = 0;
if (programSource != nullptr) {
struct stat st_file;
if (!stat(programSource, &st_file)) {
result = st_file.st_mtime;
}
}
return result;
}
static void bload_read(int bitSize, size_t size, FILE *file, var_t *retval) {
size_t count;
uint8_t *data8;
uint16_t *data16;
uint32_t *data32;
switch (bitSize) {
case 8:
data8 = (uint8_t *)malloc(size * sizeof(uint8_t));
count = fread(data8, sizeof(uint8_t), size, file);
v_toarray1(retval, count);
for (unsigned i = 0; i < count; i++) {
v_setint(v_elem(retval, i), data8[i]);
}
free(data8);
break;
case 16:
data16 = (uint16_t *)malloc(size * sizeof(uint16_t));
count = fread(data16, sizeof(uint16_t), size, file);
v_toarray1(retval, count);
for (unsigned i = 0; i < count; i++) {
v_setint(v_elem(retval, i), data16[i]);
}
free(data16);
break;
case 32:
data32 = (uint32_t *)malloc(size * sizeof(uint32_t));
count = fread(data32, sizeof(uint32_t), size, file);
v_toarray1(retval, count);
for (unsigned i = 0; i < count; i++) {
v_setint(v_elem(retval, i), data32[i]);
}
free(data32);
break;
}
}
static int cmd_bload(int argc, slib_par_t *params, var_t *retval) {
auto fileName = get_param_str(argc, params, 0, nullptr);
auto offset = get_param_int(argc, params, 1, 0);
auto length = get_param_int(argc, params, 2, 0);
auto bitSize = get_param_int(argc, params, 3, 8);
char message[256] = {0};
if (fileName != nullptr && offset >= 0 && length >= 0 && (bitSize == 8 || bitSize == 16 || bitSize == 32)) {
auto file = fopen(fileName, "rb");
if (file != nullptr) {
fseek(file, 0, SEEK_END);
auto size = ftell(file);
if (size > 0) {
if (offset < size) {
if (offset + length < size) {
// [0 | 1 | 2 | 3 | 4]
// --^ --^
if (length) {
size = length;
}
} else {
// [0 | 1 | 2 | 3 | 4]
// --^ --^
size -= offset;
}
fseek(file, offset, SEEK_SET);
bload_read(bitSize, size, file, retval);
} else {
// [0 | 1 | 2 | 3 | 4]
// --^ --^
v_setint(retval, 0);
}
} else {
snprintf(message, sizeof(message), "BLOAD: [%s] Failed to read file", fileName);
}
fclose(file);
} else {
snprintf(message, sizeof(message), "BLOAD: [%s] Failed to open file", fileName);
}
} else {
snprintf(message, sizeof(message), "BLOAD: fileName [offset [length [bitSize 8|16|32]]]");
}
if (message[0] != '\0') {
v_setstr(retval, message);
}
return message[0] == '\0';
}
static int cmd_textformat(int argc, slib_par_t *params, var_t *retval) {
v_setstr(retval, format_text(argc, params, 0));
return 1;
}
static int cmd_issourcemodified(int argc, slib_par_t *params, var_t *retval) {
v_setint(retval, modifiedTime < get_modified_time());
return 1;
}
FUNC_SIG lib_func[] = {
{1, 4, "BLOAD", cmd_bload},
{0, 0, "ISSOURCEMODIFIED", cmd_issourcemodified},
{1, 20,"TEXTFORMAT", cmd_textformat},
};
int sblib_func_count() {
return (sizeof(lib_func) / sizeof(lib_func[0]));
}
int sblib_func_getname(int index, char *proc_name) {
int result;
if (index < sblib_func_count()) {
strcpy(proc_name, lib_func[index]._name);
result = 1;
} else {
result = 0;
}
return result;
}
SBLIB_API int sblib_func_exec(int index, int argc, slib_par_t *params, var_t *retval) {
int result;
if (index >= 0 && index < sblib_func_count()) {
if (argc < lib_func[index]._min || argc > lib_func[index]._max) {
if (lib_func[index]._min == lib_func[index]._max) {
error(retval, lib_func[index]._name, lib_func[index]._min);
} else {
error(retval, lib_func[index]._name, lib_func[index]._min, lib_func[index]._max);
}
result = 0;
} else {
result = lib_func[index]._command(argc, params, retval);
}
} else {
fprintf(stderr, "Debug: FUNC index error [%d]\n", index);
result = 0;
}
return result;
}
int sblib_init(const char *sourceFile) {
programSource = strdup(sourceFile);
modifiedTime = get_modified_time();
return 1;
}
void sblib_close(void) {
free(programSource);
}