From 2232362cb171569d595be421bcdab7acf56fcb97 Mon Sep 17 00:00:00 2001
From: Ben Langfeld <ben@langfeld.me>
Date: Tue, 7 Jan 2014 22:34:35 -0200
Subject: [PATCH] Implement a version of switch_is_number

---
 cspeech.cc      | 19 +++++++++++++++++++
 cspeech.h       |  1 +
 cspeech/srgs.cc |  6 +++---
 3 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/cspeech.cc b/cspeech.cc
index 295f926..6fe01c9 100644
--- a/cspeech.cc
+++ b/cspeech.cc
@@ -15,3 +15,22 @@ static inline int cspeech_zstr(const char *s)
 {
   return !s || *s == '\0';
 }
+
+static inline bool cspeech_is_number(const char *str)
+{
+  const char *p;
+  bool r = true;
+
+  if (*str == '-' || *str == '+') {
+    str++;
+  }
+
+  for (p = str; p && *p; p++) {
+    if (!(*p == '.' || (*p > 47 && *p < 58))) {
+      r = false;
+      break;
+    }
+  }
+
+  return r;
+}
diff --git a/cspeech.h b/cspeech.h
index a3f34e7..5ca1004 100644
--- a/cspeech.h
+++ b/cspeech.h
@@ -15,6 +15,7 @@
 #define CSPEECH_H_
 
 static inline int cspeech_zstr(const char *s);
+static inline bool cspeech_is_number(const char *str);
 
 typedef enum {
   CSPEECH_LOG_DEBUG = 7,
diff --git a/cspeech/srgs.cc b/cspeech/srgs.cc
index 7209df0..435205d 100644
--- a/cspeech/srgs.cc
+++ b/cspeech/srgs.cc
@@ -609,7 +609,7 @@ static int process_item(struct srgs_grammar *grammar, char **atts)
           }
           return IKS_BADXML;
         }
-        if (switch_is_number(repeat)) {
+        if (cspeech_is_number(repeat)) {
           /* single number */
           int repeat_val = atoi(repeat);
           if (repeat_val < 1) {
@@ -633,7 +633,7 @@ static int process_item(struct srgs_grammar *grammar, char **atts)
             }
             return IKS_BADXML;
           }
-          if (switch_is_number(min) && (switch_is_number(max) || cspeech_zstr(max))) {
+          if (cspeech_is_number(min) && (cspeech_is_number(max) || cspeech_zstr(max))) {
             int min_val = atoi(min);
             int max_val = cspeech_zstr(max) ? INT_MAX : atoi(max);
             /* max must be >= min and > 0
@@ -655,7 +655,7 @@ static int process_item(struct srgs_grammar *grammar, char **atts)
         }
       } else if (!strcmp("weight", atts[i])) {
         const char *weight = atts[i + 1];
-        if (cspeech_zstr(weight) || !switch_is_number(weight) || atof(weight) < 0) {
+        if (cspeech_zstr(weight) || !cspeech_is_number(weight) || atof(weight) < 0) {
           if(globals.logging_callback) {
             globals.logging_callback(grammar, CSPEECH_LOG_INFO, "<item> weight is not a number >= 0\n");
           }