1 files changed, 150 insertions, 0 deletions
diff --git a/sway/stringop.c b/sway/stringop.c
new file mode 100644
index 00000000..0e7ad6a9
--- /dev/null
+++ b/sway/stringop.c
@@ -0,0 +1,150 @@
+#include "stringop.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include "string.h"
+#include "list.h"
+#include <strings.h>
+
+/* Note: This returns 8 characters for trimmed_start per tab character. */
+char *strip_whitespace(char *_str, int *trimmed_start) {
+	*trimmed_start = 0;
+	if (*_str == '\0')
+		return _str;
+	char *strold = _str;
+	while (*_str == ' ' || *_str == '\t') {
+		if (*_str == '\t') {
+			*trimmed_start += 8;
+		} else {
+			*trimmed_start += 1;
+		}
+		_str++;
+	}
+	char *str = malloc(strlen(_str) + 1);
+	strcpy(str, _str);
+	free(strold);
+	int i;
+	for (i = 0; str[i] != '\0'; ++i);
+	do {
+		i--;
+	} while (i >= 0 && (str[i] == ' ' || str[i] == '\t'));
+	str[i + 1] = '\0';
+	return str;
+}
+
+char *strip_comments(char *str) {
+	int in_string = 0, in_character = 0;
+	int i = 0;
+	while (str[i] != '\0') {
+		if (str[i] == '"' && !in_character) {
+			in_string = !in_string;
+		} else if (str[i] == '\'' && !in_string) {
+			in_character = !in_character;
+		} else if (!in_character && !in_string) {
+			if (str[i] == '#') {
+				str[i] = '\0';
+				break;
+			}
+		}
+		++i;
+	}
+	return str;
+}
+
+list_t *split_string(const char *str, const char *delims) {
+	list_t *res = create_list();
+	int i, j;
+	for (i = 0, j = 0; i < strlen(str) + 1; ++i) {
+		if (strchr(delims, str[i]) || i == strlen(str)) {
+			if (i - j == 0) {
+				continue;
+			}
+			char *left = malloc(i - j + 1);
+			memcpy(left, str + j, i - j);
+			left[i - j] = 0;
+			list_add(res, left);
+			j = i + 1;
+			while (j <= strlen(str) && str[j] && strchr(delims, str[j])) {
+				j++;
+				i++;
+			}
+		}
+	}
+	return res;
+}
+
+void free_flat_list(list_t *list) {
+	int i;
+	for (i = 0; i < list->length; ++i) {
+		free(list->items[i]);
+	}
+	list_free(list);
+}
+
+char *code_strstr(const char *haystack, const char *needle) {
+	/* TODO */
+	return strstr(haystack, needle);
+}
+
+char *code_strchr(const char *str, char delimiter) {
+	int in_string = 0, in_character = 0;
+	int i = 0;
+	while (str[i] != '\0') {
+		if (str[i] == '"' && !in_character) {
+			in_string = !in_string;
+		} else if (str[i] == '\'' && !in_string) {
+			in_character = !in_character;
+		} else if (!in_character && !in_string) {
+			if (str[i] == delimiter) {
+				return (char *)str + i;
+			}
+		}
+		++i;
+	}
+	return NULL;
+}
+
+int unescape_string(char *string) {
+	/* TODO: More C string escapes */
+	int len = strlen(string);
+	int i;
+	for (i = 0; string[i]; ++i) {
+		if (string[i] == '\\') {
+			--len;
+			switch (string[++i]) {
+			case '0':
+				string[i - 1] = '\0';
+				memmove(string + i, string + i + 1, len - i);
+				break;
+			case 'a':
+				string[i - 1] = '\a';
+				memmove(string + i, string + i + 1, len - i);
+				break;
+			case 'b':
+				string[i - 1] = '\b';
+				memmove(string + i, string + i + 1, len - i);
+				break;
+			case 't':
+				string[i - 1] = '\t';
+				memmove(string + i, string + i + 1, len - i);
+				break;
+			case 'n':
+				string[i - 1] = '\n';
+				memmove(string + i, string + i + 1, len - i);
+				break;
+			case 'v':
+				string[i - 1] = '\v';
+				memmove(string + i, string + i + 1, len - i);
+				break;
+			case 'f':
+				string[i - 1] = '\f';
+				memmove(string + i, string + i + 1, len - i);
+				break;
+			case 'r':
+				string[i - 1] = '\r';
+				memmove(string + i, string + i + 1, len - i);
+				break;
+			}
+		}
+	}
+	return len;
+}