mirror of
https://github.com/pevans/erc-c.git
synced 2024-09-07 21:54:22 +00:00
First commit
This commit is contained in:
commit
237d5e3cb6
2
.gitignore
vendored
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2
.gitignore
vendored
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*.swp
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build
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19
CMakeLists.txt
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19
CMakeLists.txt
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cmake_minimum_required(VERSION 3.9)
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# it me
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project(emp)
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include(sources.cmake)
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foreach(src ${emp_sources})
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string(CONCAT relsrc src/ ${src})
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list(APPEND sources ${relsrc})
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endforeach(src)
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# our header files
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include_directories(include /usr/local/include)
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link_directories(/usr/local/lib)
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# our bullshit
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add_executable(emp ${sources} src/main.c)
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0
build/.gitkeep
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0
build/.gitkeep
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11
include/log.h
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include/log.h
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#ifndef _LOG_H_
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#define _LOG_H_
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extern void log_write(int, const char *, ...);
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extern void log_close();
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extern void log_open();
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#define log_critical(...) log_write(0, __VA_ARGS__)
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#define log_error(...) log_write(0, __VA_ARGS__)
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#endif
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18
include/vm_screen.h
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include/vm_screen.h
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#ifndef _VM_SCREEN_H_
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#define _VM_SCREEN_H_
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typedef struct {
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int color_red;
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int color_green;
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int color_blue;
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int color_alpha;
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} vm_screen_context;
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extern void vm_screen_draw_rect(vm_screen_context *, int, int, int, int);
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extern vm_screen_context *vm_screen_new_context();
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extern void vm_screen_set_color(vm_screen_context *, int, int, int, int);
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#define vm_screen_draw_pixel(context, xpos, ypos) \
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vm_screen_draw_rect(context, xpos, ypos, 1, 1)
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#endif
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21
include/vm_segment.h
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include/vm_segment.h
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#ifndef _VM_SEGMENT_H_
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#define _VM_SEGMENT_H_
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#define VM_SEGMENT_TABLE_MAX 16
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typedef uint8_t vm_segment_byte;
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typedef struct {
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size_t size;
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vm_segment_byte *memory;
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} vm_segment;
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extern void vm_segment_copy(vm_segment *, vm_segment *, size_t, size_t, size_t);
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extern vm_segment *vm_segment_create(size_t);
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extern vm_segment_byte vm_segment_get(vm_segment *, size_t);
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extern void vm_segment_set(vm_segment *, size_t, vm_segment_byte);
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#define vm_segment_bounds_check(segment, index) \
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(index == index % segment->size)
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#endif
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5
sources.cmake
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5
sources.cmake
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set(emp_sources
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log.c
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vm_screen.c
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vm_segment.c
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)
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34
src/log.c
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src/log.c
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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static FILE *log_stream = NULL;
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void
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log_open()
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{
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log_stream = fopen("/tmp/emp.log", "w");
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if (log_stream == NULL) {
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perror("Couldn't open log file (/tmp/emp.log)");
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exit(1);
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}
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}
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void
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log_close()
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{
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if (log_stream != NULL) {
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fclose(log_stream);
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}
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}
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void
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log_write(int level, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vfprintf(log_stream, fmt, ap);
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fprintf(log_stream, "\n");
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va_end(ap);
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}
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27
src/main.c
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src/main.c
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#include <stdio.h>
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#include <stdlib.h>
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#include "log.h"
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static void
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init()
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{
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log_open();
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}
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static void
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finish()
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{
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log_close();
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}
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int
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main(int argc, char **argv)
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{
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init();
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// When we exit, we want to wrap up a few loose ends.
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atexit(finish);
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printf("Hello, world\n");
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}
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42
src/vm_screen.c
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42
src/vm_screen.c
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#include <stdlib.h>
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#include "log.h"
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#include "vm_screen.h"
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vm_screen_context *
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vm_screen_new_context()
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{
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vm_screen_context *context;
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context = (vm_screen_context *)malloc(sizeof(vm_screen_context));
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if (context == NULL) {
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log_critical("Failed to allocate vm_screen_context");
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exit(1);
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}
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vm_screen_set_color(context, 0, 0, 0, 0);
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return context;
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}
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void
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vm_screen_set_color(vm_screen_context *context,
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int red,
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int green,
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int blue,
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int alpha)
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{
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context->color_red = red;
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context->color_green = green;
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context->color_blue = blue;
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context->color_alpha = alpha;
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}
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void
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vm_screen_draw_rect(vm_screen_context *context,
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int xpos,
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int ypos,
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int xsize,
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int ysize)
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{
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// FIXME: NOOP
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}
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104
src/vm_segment.c
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104
src/vm_segment.c
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#include <stdlib.h>
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#include <string.h>
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#include "log.h"
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#include "vm_segment.h"
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static vm_segment *seg_table[VM_SEGMENT_TABLE_MAX];
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static unsigned int seg_index = 0;
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vm_segment *
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vm_segment_create(size_t size)
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{
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vm_segment *seg;
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// Block us from attempting to allocate any memory beyond the
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// maximum defined blocks.
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if (seg_index >= VM_SEGMENT_TABLE_MAX) {
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log_error("Attempted to allocate more segments than we allow");
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return NULL;
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}
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// Allocate memory for the current memory segment.
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seg = seg_table[seg_index] =
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malloc(sizeof(vm_segment) * size);
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// Ack! We couldn't get the memory we wanted. Let's bail.
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if (seg == NULL) {
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log_critical("Couldn't allocate enough space for vm_segment");
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return NULL;
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}
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// We want to increment the current segment index only after a
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// _successful_ allocation.
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seg_index++;
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return seg;
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}
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void
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vm_segment_set(vm_segment *segment, size_t index, vm_segment_byte value)
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{
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// Some bounds checking.
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if (!vm_segment_bounds_check(segment, index)) {
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log_critical(
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"Attempt to set segment index (%d) greater than bounds (%d)",
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index,
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segment->size);
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// We prefer to exit in this scenario, rather than try to
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// "handle" it with an overflow, because we would rather a crash
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// over ill-defined behavior.
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exit(1);
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}
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segment->memory[index] = value;
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}
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vm_segment_byte
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vm_segment_get(vm_segment *segment, size_t index)
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{
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if (!vm_segment_bounds_check(segment, index)) {
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log_critical(
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"Attempt to set segment index (%d) greater than bounds (%d)",
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index,
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segment->size);
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// See vm_segment_set() for a justification of this behavior.
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exit(1);
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}
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return segment->memory[index];
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}
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void
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vm_segment_copy(vm_segment *src,
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vm_segment *dest,
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size_t src_index,
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size_t dest_index,
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size_t length)
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{
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if (src_index + length >= src->size) {
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log_critical(
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"Attempt to copy beyond bounds of vm_segment (%d + %d >= %d)",
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src_index,
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length,
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src->size);
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exit(1);
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}
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if (dest_index + length >= dest->size) {
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log_critical(
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"Attempt to copy beyond bounds of vm_segment (%d + %d >= %d)",
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dest_index,
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length,
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dest->size);
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exit(1);
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}
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memcpy(dest->memory + dest_index,
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src->memory + src_index,
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length * sizeof(src->memory[src_index]));
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}
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18
tests/CMakeLists.txt
Normal file
18
tests/CMakeLists.txt
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cmake_minimum_required(VERSION 3.9)
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project(emp-test)
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include_directories(../include /usr/local/include)
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link_directories(/usr/local/lib)
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include(../sources.cmake)
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foreach(src ${emp_sources})
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string(CONCAT relsrc ../src/ ${src})
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list(APPEND sources ${relsrc})
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endforeach(src)
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add_executable(emp-test ${sources} ./main.c)
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target_link_libraries(emp-test criterion)
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0
tests/build/.gitkeep
Normal file
0
tests/build/.gitkeep
Normal file
5
tests/main.c
Normal file
5
tests/main.c
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@ -0,0 +1,5 @@
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#include <criterion/criterion.h>
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Test(simple, test) {
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cr_assert(0, "Hello!");
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}
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