[ruby/prism] Remove ssize_t usage

ruby/prism@64c4f1268b

prism/static_literals.c

@@ -460,9 +460,9 @@ pm_static_literal_inspect(pm_buffer_t *buffer, const pm_parser_t *parser, const
                 // %g will not insert a .0 for 1e100 (we'll get back 1e+100). So
                 // we check for the decimal point and add it in here if it's not
                 // present.
-                if (pm_buffer_index(buffer, '.') == -1) {
-                    ssize_t exponent_index = pm_buffer_index(buffer, 'e');
-                    size_t index = exponent_index == -1 ? pm_buffer_length(buffer) : (size_t) exponent_index;
+                if (pm_buffer_index(buffer, '.') == SIZE_MAX) {
+                    size_t exponent_index = pm_buffer_index(buffer, 'e');
+                    size_t index = exponent_index == SIZE_MAX ? pm_buffer_length(buffer) : exponent_index;
                     pm_buffer_insert(buffer, index, ".0", 2);
                 }
             }

prism/util/pm_buffer.c

@@ -286,15 +286,17 @@ pm_buffer_rstrip(pm_buffer_t *buffer) {
 /**
  * Checks if the buffer includes the given value.
  */
-ssize_t pm_buffer_index(const pm_buffer_t *buffer, char value) {
+size_t
+pm_buffer_index(const pm_buffer_t *buffer, char value) {
     const char *first = memchr(buffer->value, value, buffer->length);
-    return (first == NULL) ? -1 : (ssize_t) (first - buffer->value);
+    return (first == NULL) ? SIZE_MAX : (size_t) (first - buffer->value);
 }
 
 /**
  * Insert the given string into the buffer at the given index.
  */
-void pm_buffer_insert(pm_buffer_t *buffer, size_t index, const char *value, size_t length) {
+void
+pm_buffer_insert(pm_buffer_t *buffer, size_t index, const char *value, size_t length) {
     assert(index <= buffer->length);
 
     if (index == buffer->length) {

prism/util/pm_buffer.h

@@ -201,10 +201,10 @@ void pm_buffer_rstrip(pm_buffer_t *buffer);
  *
  * @param buffer The buffer to check.
  * @param value The value to check for.
- * @returns The index of the first occurrence of the value in the buffer, or -1
- *   if the value is not found.
+ * @returns The index of the first occurrence of the value in the buffer, or
+ *   SIZE_MAX if the value is not found.
  */
-ssize_t pm_buffer_index(const pm_buffer_t *buffer, char value);
+size_t pm_buffer_index(const pm_buffer_t *buffer, char value);
 
 /**
  * Insert the given string into the buffer at the given index.