2 files changed, 161 insertions, 0 deletions
diff --git a/src/format.c b/src/format.c
new file mode 100644
index 0000000..a7bad77
--- /dev/null
+++ b/src/format.c
@@ -0,0 +1,119 @@
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+
+#include "format.h"
+#include "any_log.h"
+#include "util.h"
+
+format_status_t format_init(format_t *format, const char *string, char delim, const format_pair_t *pairs)
+{
+    format_status_t status = FORMAT_SUCCESS;
+
+    char **parts = NULL;
+    size_t length = 0, n = 0;
+    size_t start = 0, end = 0;
+
+    size_t i = 0;
+    while (string[i] != '\0') {
+        if (string[i] == delim) {
+            // TODO
+            //if (string[i + 1] == delim) {
+            //}
+
+            if (string[i + 1] == '{') {
+                if (start != end) {
+                    parts = realloc(parts, ++length * sizeof(char **));
+                    parts[n++] = strslice(string, start, end);
+                }
+
+                start = end = i + 2;
+                while (string[end] != '}') {
+                    if (string[end] == '\0') {
+                        status = FORMAT_UNTERMINATED;
+                        goto clean;
+                    }
+                    if (string[end] == '$' && string[end + 1] == '{') {
+                        status = FORMAT_NESTED;
+                        goto clean;
+                    }
+                    end++;
+                }
+
+                size_t l = end - start;
+                size_t next = --end;
+
+                while (start <= end && isspace(string[start])) start++, l--;
+                while (start <= end && isspace(string[end])) end--, l--;
+
+                log_info("%c'", string[end]);
+                log_info("'%.*s'", (int)l, string + start);
+
+                for (size_t p = 0; pairs[p].action != FORMAT_NONE; p++) {
+                    if (pairs[p].key == NULL ||
+                        (strlen(pairs[p].key) == l && !strncmp(string + start, pairs[p].key, l))) {
+
+                        parts = realloc(parts, ++length * sizeof(char **));
+                        switch (pairs[p].action) {
+                            case FORMAT_STRING:
+                                parts[n++] = strcopy(pairs[p].value);
+                                break;
+
+                            case FORMAT_BYTE:
+                                parts[n++] = (char *)(uintptr_t)pairs[p].byte;
+                                break;
+
+                            case FORMAT_FUNCTION:
+                                if (pairs[p].key == NULL)  {
+                                    char *key = strslice(string, start, l + start);
+                                    parts[n++] = pairs[p].fn(key);
+                                    free(key);
+                                } else
+                                    parts[n++] = pairs[p].fn(pairs[p].key);
+                                break;
+
+                            default:
+                                unreachable();
+                        }
+
+                        start = i = ++next;
+                        goto next;
+                    }
+                }
+
+                status = FORMAT_UNKNOWN;
+                goto clean;
+            }
+
+        }
+
+        end = i++;
+next:
+    }
+
+    if (string[end] != '\0') {
+        while (string[end] != '\0') end++;
+        parts = realloc(parts, ++length * sizeof(char **));
+        parts[n++] = strslice(string, start, end);
+    }
+
+    format->parts = parts;
+    format->length = n;
+
+    return status;
+
+clean:
+    for (size_t i = 0; i < length; i++) {
+        // XXX: Ugly and probably will explode
+        if ((uintptr_t)parts[i] > UINT8_MAX)
+            free(parts[i]);
+    }
+    free(parts);
+
+    return status;
+}
+
+void format_free(format_t *format)
+{
+    free(format->parts);
+}
diff --git a/src/format.h b/src/format.h
new file mode 100644
index 0000000..bceff0c
--- /dev/null
+++ b/src/format.h
@@ -0,0 +1,42 @@
+#ifndef COMET_FORMAT_H
+#define COMET_FORMAT_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+typedef struct {
+    char **parts;
+    size_t length;
+} format_t;
+
+typedef enum {
+    FORMAT_SUCCESS,
+    FORMAT_NESTED,
+    FORMAT_UNKNOWN,
+    FORMAT_UNTERMINATED,
+} format_status_t;
+
+typedef enum {
+    FORMAT_NONE,
+    FORMAT_STRING,
+    FORMAT_BYTE,
+    FORMAT_FUNCTION,
+} format_action_t;
+
+typedef char *(*format_function_t)(const char *key);
+
+typedef struct {
+    format_action_t action;
+    const char *key;
+    union {
+        const char *value;
+        uint8_t byte;
+        format_function_t fn;
+    };
+} format_pair_t;
+
+format_status_t format_init(format_t *format, const char *string, char delim, const format_pair_t *pairs);
+
+void format_free(format_t *format);
+
+#endif