Merge pull request #3275 from ianyfan/remove-readline

Rewrite strip_whitespace and remove readline.c

1 files changed, 68 insertions, 56 deletions

diff --git a/sway/config.c b/sway/config.c
index 5d631b7e..8a0b293c 100644
--- a/sway/config.c
+++ b/sway/config.c
@@ -1,4 +1,4 @@
-#define _XOPEN_SOURCE 600 // for realpath
+#define _XOPEN_SOURCE 700 // for realpath
 #include <stdio.h>
 #include <stdbool.h>
 #include <stdlib.h>
@@ -30,7 +30,6 @@
 #include "sway/tree/workspace.h"
 #include "cairo.h"
 #include "pango.h"
-#include "readline.h"
 #include "stringop.h"
 #include "list.h"
 #include "log.h"
@@ -571,28 +570,49 @@ bool load_include_configs(const char *path, struct sway_config *config,
         return true;
 }
 
-static int detect_brace_on_following_line(FILE *file, char *line,
-                int line_number) {
-        int lines = 0;
-        if (line[strlen(line) - 1] != '{' && line[strlen(line) - 1] != '}') {
-                char *peeked = NULL;
-                long position = 0;
-                do {
-                        free(peeked);
-                        peeked = peek_line(file, lines, &position);
-                        if (peeked) {
-                                peeked = strip_whitespace(peeked);
+// get line, with backslash continuation
+static ssize_t getline_with_cont(char **lineptr, size_t *line_size, FILE *file) {
+        char *next_line = NULL;
+        size_t next_line_size = 0;
+        ssize_t nread = getline(lineptr, line_size, file);
+        while (nread >= 2 && strcmp(&(*lineptr)[nread - 2], "\\\n") == 0) {
+                ssize_t next_nread = getline(&next_line, &next_line_size, file);
+                if (next_nread == -1) {
+                        break;
+                }
+
+                nread += next_nread - 2;
+                if ((ssize_t) *line_size < nread + 1) {
+                        *line_size = nread + 1;
+                        *lineptr = realloc(*lineptr, *line_size);
+                        if (!*lineptr) {
+                                nread = -1;
+                                break;
                         }
-                        lines++;
-                } while (peeked && strlen(peeked) == 0);
+                }
+                strcpy(&(*lineptr)[nread - next_nread], next_line);
+        }
+        free(next_line);
+        return nread;
+}
 
-                if (peeked && strlen(peeked) == 1 && peeked[0] == '{') {
-                        fseek(file, position, SEEK_SET);
-                } else {
-                        lines = 0;
+static int detect_brace(FILE *file) {
+        int lines = 0;
+        long pos = ftell(file);
+        char *line = NULL;
+        size_t line_size = 0;
+        while ((getline(&line, &line_size, file)) != -1) {
+                lines++;
+                strip_whitespace(line);
+                if (*line) {
+                        if (strcmp(line, "{") != 0) {
+                                fseek(file, pos, SEEK_SET);
+                                lines = 0;
+                        }
+                        break;
                 }
-                free(peeked);
         }
+        free(line);
         return lines;
 }
 
@@ -635,55 +655,47 @@ bool read_config(FILE *file, struct sway_config *config,
 
         bool success = true;
         int line_number = 0;
-        char *line;
+        char *line = NULL;
+        size_t line_size = 0;
+        ssize_t nread;
         list_t *stack = create_list();
         size_t read = 0;
-        while (!feof(file)) {
-                char *block = stack->length ? stack->items[0] : NULL;
-                line = read_line(file);
-                if (!line) {
-                        continue;
-                }
-                line_number++;
-                wlr_log(WLR_DEBUG, "Read line %d: %s", line_number, line);
-
+        while ((nread = getline_with_cont(&line, &line_size, file)) != -1) {
                 if (reading_main_config) {
-                        size_t length = strlen(line);
-
-                        if (read + length > config_size) {
+                        if (read + nread > config_size) {
                                 wlr_log(WLR_ERROR, "Config file changed during reading");
-                                list_free_items_and_destroy(stack);
-                                free(line);
-                                return false;
+                                success = false;
+                                break;
                         }
 
-                        strcpy(this_config + read, line);
-                        if (line_number != 1) {
-                                this_config[read - 1] = '\n';
-                        }
-                        read += length + 1;
+                        strcpy(&this_config[read], line);
+                        read += nread;
                 }
 
-                line = strip_whitespace(line);
-                if (line[0] == '#') {
-                        free(line);
-                        continue;
+                if (line[nread - 1] == '\n') {
+                        line[nread - 1] = '\0';
                 }
-                if (strlen(line) == 0) {
-                        free(line);
+
+                line_number++;
+                wlr_log(WLR_DEBUG, "Read line %d: %s", line_number, line);
+
+                strip_whitespace(line);
+                if (!*line || line[0] == '#') {
                         continue;
                 }
-                int brace_detected = detect_brace_on_following_line(file, line,
-                                line_number);
-                if (brace_detected > 0) {
-                        line_number += brace_detected;
-                        wlr_log(WLR_DEBUG, "Detected open brace on line %d", line_number);
+                int brace_detected = 0;
+                if (line[strlen(line) - 1] != '{' && line[strlen(line) - 1] != '}') {
+                        brace_detected = detect_brace(file);
+                        if (brace_detected > 0) {
+                                line_number += brace_detected;
+                                wlr_log(WLR_DEBUG, "Detected open brace on line %d", line_number);
+                        }
                 }
+                char *block = stack->length ? stack->items[0] : NULL;
                 char *expanded = expand_line(block, line, brace_detected > 0);
                 if (!expanded) {
-                        list_free_items_and_destroy(stack);
-                        free(line);
-                        return false;
+                        success = false;
+                        break;
                 }
                 config->current_config_line_number = line_number;
                 config->current_config_line = line;
@@ -743,9 +755,9 @@ bool read_config(FILE *file, struct sway_config *config,
                 default:;
                 }
                 free(expanded);
-                free(line);
                 free_cmd_results(res);
         }
+        free(line);
         list_free_items_and_destroy(stack);
         config->current_config_line_number = 0;
         config->current_config_line = NULL;