From 868f96c759b6650d88ff9f4fbc5c048302134248 Mon Sep 17 00:00:00 2001
From: Sebastien Blot
Date: Wed, 20 Sep 2017 10:11:01 +0200
Subject: Initial import

---
 src/sp_config_utils.c | 211 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 211 insertions(+)
 create mode 100644 src/sp_config_utils.c

(limited to 'src/sp_config_utils.c')

diff --git a/src/sp_config_utils.c b/src/sp_config_utils.c
new file mode 100644
index 0000000..e05e95e
--- /dev/null
+++ b/src/sp_config_utils.c
@@ -0,0 +1,211 @@
+#include "php_snuffleupagus.h"
+
+static int validate_int(const char *value);
+static int validate_str(const char *value);
+
+static sp_pure int validate_int(const char *value) {
+  for (size_t i = 0; i < strlen(value); i++) {
+    if (!isdigit(value[i])) {
+      return -1;
+    }
+  }
+  return 0;
+}
+
+static sp_pure int validate_str(const char *value) {
+  int balance = 0;  // ghetto [] validation
+
+  if (!strchr(value, '[')) {
+    return 0;
+  }
+
+  for (size_t i = 0; i < strlen(value); i++) {
+    if (value[i] == '[') {
+      balance++;
+    } else if (value[i] == ']') {
+      balance--;
+    }
+    if (balance < 0) {
+      return -1;
+    }
+  }
+  return balance != 0;
+}
+
+int parse_keywords(sp_config_functions *funcs, char *line) {
+  int value_len = 0;
+  const char *original_line = line;
+  for (size_t i = 0; funcs[i].func; i++) {
+    if (!strncmp(funcs[i].token, line, strlen(funcs[i].token))) {
+      line += strlen(funcs[i].token);
+      value_len = funcs[i].func(line, funcs[i].token, funcs[i].retval) + 1;
+      if (value_len == 0) {  // bad parameter
+        return -1;
+      }
+      line += value_len;
+      i = -1;  // we start the loop again
+    }
+  }
+  while (*line == ';' || *line == '\t' || *line == ' ') {
+    line++;
+  }
+
+  if (*line == '#') {
+    return 0;
+  }
+
+  if (*line) {
+    sp_log_err("config", "Trailing chars '%s' at the end of '%s'.", line,
+               original_line);
+    return -1;
+  }
+  return 0;
+}
+
+static char *get_string(size_t *consumed, char *restrict line,
+                        const char *restrict keyword) {
+  enum { IN_ESCAPE, NONE } state = NONE;
+  char *original_line = line;
+  size_t j = 0;
+
+  char *ret = NULL;
+  if (NULL == line) {
+    goto err;
+  }
+
+  ret = pecalloc(sizeof(char), strlen(original_line) + 1, 1);
+
+  /* The first char of a string is always '"', since they MUST be quoted. */
+  if ('"' == *line) {
+    line++;
+  } else {
+    goto err;
+  }
+
+  for (size_t i = 0; line[i] && j < strlen(original_line) - 2; i++) {
+    switch (line[i]) {
+      case '"':
+        /* A double quote at this point is either:
+          - at the very end of the string.
+          - escaped
+          */
+        if ((state == NONE) && (line[i + 1] == SP_TOKEN_END_PARAM)) {
+          /* The `+2` if for
+           1. the terminal double-quote
+           2. the SP_TOKEN_END_PARAM
+           */
+          *consumed = i + 2;
+          return ret;
+        } else if (state == IN_ESCAPE) {
+          break;  // we're on an escped double quote
+        } else {
+          goto err;
+        }
+      case '\\':
+        if (state == NONE) {
+          state = IN_ESCAPE;
+          continue;
+        }
+      default:
+        break;
+    }
+    if (state == IN_ESCAPE) {
+      state = NONE;
+    }
+    ret[j++] = line[i];
+  }
+err:
+  sp_log_err("error",
+             "There is an issue with the parsing of '%s': it doesn't look like a valid string.",
+             original_line ? original_line : "NULL");
+  line = NULL;
+  return NULL;
+}
+
+static char *get_misc(char *restrict line, const char *restrict keyword) {
+  size_t i = 0;
+  char *ret = pecalloc(sizeof(char), 1024, 1);
+
+  while (i < 1024 - 1 && line[i] && line[i] != SP_TOKEN_END_PARAM) {
+    ret[i] = line[i];
+    i++;
+  }
+
+  if (line[i] != SP_TOKEN_END_PARAM) {
+    if (i >= 1024 - 1) {
+      sp_log_err("config", "The following line is too long: %s.", line);
+		} else {
+      sp_log_err("config", "Missing closing %c in line %s.", SP_TOKEN_END_PARAM,
+                 line);
+		}
+    return NULL;
+  } else if (i == 0) {
+    sp_log_err("config", "The keyword %s%c is expecting a parameter.",
+     keyword, SP_TOKEN_END_PARAM);
+    return NULL;
+  }
+  return ret;
+}
+
+char *get_param(size_t *consumed, char *restrict line, sp_type type,
+                const char *restrict keyword) {
+  char *retval = NULL;
+  if (type == SP_TYPE_STR) {
+    retval = get_string(consumed, line, keyword);
+  } else {
+    retval = get_misc(line, keyword);
+    *consumed = retval ? strlen(retval) : 0;
+  }
+
+  if (retval) {
+    if (type == SP_TYPE_STR && 0 == validate_str(retval)) {
+      return retval;
+    } else if (type == SP_TYPE_INT && 0 == validate_int(retval)) {
+      return retval;
+    }
+  }
+  return NULL;
+}
+
+// FIXME this is leaking like hell @blotus
+int array_to_list(char **name_ptr, sp_node_t **keys) {
+  int in_key = 0;
+  size_t i = 0;
+  char *name = *name_ptr;
+  char *key_name = ecalloc(strlen(name) + 1, 1);  // im way too lazy for
+                                                       // now
+  char *tmp = ecalloc(strlen(name) + 1, 1);
+
+  for (i = 0; name[i] != '['; i++) {
+    tmp[i] = name[i];
+  }
+  tmp[i] = 0;
+
+  for (size_t j = 0; name[i]; i++) {
+    const char c = name[i];
+    if (c == '[') {
+      if (in_key == 0) {
+        in_key = 1;
+      } else {
+        efree(key_name);
+        return -1;
+      }
+    } else if (c == ']') {
+      if (in_key == 0) {
+        efree(key_name);
+        return -1;
+      } else {
+        in_key = 0;
+        j = 0;
+        sp_list_insert(*keys, pestrdup(key_name, 1));
+        memset(key_name, 0, strlen(name) + 1);
+      }
+    } else if (in_key == 1) {
+      key_name[j] = c;
+      j++;
+    }
+  }
+  efree(key_name);
+  *name_ptr = pestrdup(tmp, 1);
+  return in_key;
+}
-- 
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