1 files changed, 128 insertions, 0 deletions
diff --git a/src/bindings_file.c b/src/bindings_file.c
new file mode 100644
index 0000000..4eab11f
--- /dev/null
+++ b/src/bindings_file.c
@@ -0,0 +1,128 @@
+#include "bindings_file.h"
+#include "binding.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <ctype.h>
+#include <string.h>
+
+
+struct binding *bindings = NULL;
+size_t nbindings = 0;
+
+void skip_space(char **c)
+{
+	for (; **c && isspace(**c); (*c)++);
+}
+
+int read_int(char **c, int out[static 1])
+{
+	if (!isdigit(**c))
+	{
+		return -1;
+	}
+	errno = 0;
+	char *end = NULL;
+	*out = strtol(*c, &end, 10);
+	if (errno)
+	{
+		return -1;
+	}
+	*c = end;
+	return 0;
+}
+
+void parse_bindings_file(const char path[static 1])
+{
+	size_t cap = 512;
+	bindings = malloc(sizeof (struct binding) * cap);
+	FILE *f = fopen(path, "r");
+	if (f == NULL)
+	{
+		fprintf(stderr, "failed to open bindings file: %s: %s\n", path,
+		        strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+
+	size_t line_nb = 0;
+	char *line = NULL;
+	size_t n;
+	while (getline(&line, &n, f) != -1)
+	{
+		line_nb++;
+		struct binding binding = {0};
+		char *end = strchr(line, '#');
+		if (end == NULL)
+		{
+			end = line + strlen(line);
+		}
+		*end = '\0';
+		char *c = line;
+
+		skip_space(&c);
+		if (c == end) continue;
+
+		/* code */
+		int code;
+		for (;;)
+		{
+			if (read_int(&c, &code) < 0 || c >= end)
+			{
+				goto fail;
+			}
+			set_key(binding.keys, code);
+			if (*c++ != '+')
+			{
+				c--;
+				break;
+			}
+		}
+
+		/* press | release */
+		skip_space(&c);
+		if (strncmp(c, "press", strlen("press")) == 0)
+		{
+			c += strlen("press");
+			binding.value = PRESSED;
+		}
+		else if (strncmp(c, "release", strlen("release")) == 0)
+		{
+			c += strlen("release");
+			binding.value = RELEASED;
+		}
+		else
+		{
+			goto fail;
+		}
+
+		/* cmd */
+		skip_space(&c);
+		if (c >= end)
+		{
+			goto fail;
+		}
+		binding.cmd = malloc(end - c + 1);
+		memcpy(binding.cmd, c, end - c + 1);
+
+		if (nbindings >= cap)
+		{
+			cap *= 2;
+			bindings = realloc(bindings, cap * sizeof (struct binding));
+		}
+		bindings[nbindings++] = binding;
+	}
+	if (!feof(f))
+	{
+		fprintf(stderr, "failed to read bindings file: %s: %s\n", path,
+		        strerror(errno));
+	}
+	free(line);
+	fclose(f);
+	return;
+
+fail:
+	fprintf(stderr, "syntax error at line %ld\n", line_nb);
+	exit(EXIT_FAILURE);
+}
+