properly cast integers in -C so that integer overflow doesnt occur

fixed a small error detection bug
version bump

configure

@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for btcwatch 0.1.3.
+# Generated by GNU Autoconf 2.69 for btcwatch 0.1.4.
 #
 # Report bugs to <marco@scannadinari.co.uk>.
 #
@@ -579,9 +579,9 @@ MAKEFLAGS=
 
 # Identity of this package.
 PACKAGE_NAME='btcwatch'
-PACKAGE_TARNAME='btcwatch-0.1.3'
-PACKAGE_VERSION='0.1.3'
-PACKAGE_STRING='btcwatch 0.1.3'
+PACKAGE_TARNAME='btcwatch-0.1.4'
+PACKAGE_VERSION='0.1.4'
+PACKAGE_STRING='btcwatch 0.1.4'
 PACKAGE_BUGREPORT='marco@scannadinari.co.uk'
 PACKAGE_URL='https://github.com/marcoms/btcwatch'
 
@@ -1224,7 +1224,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures btcwatch 0.1.3 to adapt to many kinds of systems.
+\`configure' configures btcwatch 0.1.4 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1272,7 +1272,7 @@ Fine tuning of the installation directories:
   --infodir=DIR           info documentation [DATAROOTDIR/info]
   --localedir=DIR         locale-dependent data [DATAROOTDIR/locale]
   --mandir=DIR            man documentation [DATAROOTDIR/man]
-  --docdir=DIR            documentation root [DATAROOTDIR/doc/btcwatch-0.1.3]
+  --docdir=DIR            documentation root [DATAROOTDIR/doc/btcwatch-0.1.4]
   --htmldir=DIR           html documentation [DOCDIR]
   --dvidir=DIR            dvi documentation [DOCDIR]
   --pdfdir=DIR            pdf documentation [DOCDIR]
@@ -1285,7 +1285,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of btcwatch 0.1.3:";;
+     short | recursive ) echo "Configuration of btcwatch 0.1.4:";;
    esac
   cat <<\_ACEOF
 
@@ -1366,7 +1366,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-btcwatch configure 0.1.3
+btcwatch configure 0.1.4
 generated by GNU Autoconf 2.69
 
 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -1668,7 +1668,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by btcwatch $as_me 0.1.3, which was
+It was created by btcwatch $as_me 0.1.4, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   $ $0 $@
@@ -3883,7 +3883,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by btcwatch $as_me 0.1.3, which was
+This file was extended by btcwatch $as_me 0.1.4, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -3928,7 +3928,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-btcwatch config.status 0.1.3
+btcwatch config.status 0.1.4
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 

configure.ac

@@ -1,4 +1,4 @@
-AC_INIT([btcwatch], [0.1.3], [marco@scannadinari.co.uk], [btcwatch-0.1.3], [https://github.com/marcoms/btcwatch])
+AC_INIT([btcwatch], [0.1.4], [marco@scannadinari.co.uk], [btcwatch-0.1.4], [https://github.com/marcoms/btcwatch])
 
 define([errnf], [echo "  configure: error: $1 not found"; exit 1])
 

src/btcutil.c

@@ -115,7 +115,7 @@ noreturn void help(const char *const prog_nm, const char *const topic) {
 			"  -b             --buy                         print buy price\n"
 			"  -c CURRENCY    --currency=CURRENCY           set conversion currency\n"
 			"  -k [INTERVAL]  --keep-monitoring[=INTERVAL]  indefinitely monitor the price,\n"
-			"                                                and wait for INTERVAL seconds each time\n"
+			"                                                 and wait for INTERVAL seconds each time\n"
 			"  -n AMOUNT      --amount=AMOUNT               set the amount to convert\n"
 			"  -o [BOOLEAN]   --colour[=BOOLEAN]            enable use of colour\n"
 			"  -p             --ping                        check for a successful JSON response\n"

src/main.c

@@ -250,7 +250,7 @@ int main(int argc, char **argv) {
 										: "DOWN",
 
 								rates.currcy.sign,
-								((double) (rates.buy - btcstore.buy) / (double) rates.currcy.sf),
+								((double) ((int32_t) rates.buy - (int32_t) btcstore.buy) / rates.currcy.sf),
 								rates.currcy.name,
 								btcstore.buyf,
 								rates.buyf
@@ -271,7 +271,7 @@ int main(int argc, char **argv) {
 										: "DOWN",
 
 								rates.currcy.sign,
-								((double) (rates.sell - btcstore.sell) / (double) rates.currcy.sf),
+								((double) ((int32_t) rates.sell - (int32_t) btcstore.sell) / rates.currcy.sf),
 								rates.currcy.name,
 								btcstore.sellf,
 								rates.sellf
@@ -293,7 +293,7 @@ int main(int argc, char **argv) {
 										? RED("DOWN")
 										: "DOWN",
 
-								((double) (rates.buy - btcstore.buy) / (double) rates.currcy.sf)
+								((double) ((int32_t) rates.buy - (int32_t) btcstore.buy) / rates.currcy.sf)
 							);
 						}
 
@@ -311,7 +311,7 @@ int main(int argc, char **argv) {
 										? RED("DOWN")
 										: "DOWN",
 
-								((double) (rates.sell - btcstore.sell) / (double) rates.currcy.sf)
+								((double) ((int32_t) rates.sell - (int32_t) btcstore.sell) / rates.currcy.sf)
 							);
 						}
 					}
@@ -327,7 +327,9 @@ int main(int argc, char **argv) {
 					find_paths(btcpath, btcpathwf);
 					found_path = true;
 				}
-				if(mkdir(btcpath, S_IRWXU) == -1) error(EXIT_FAILURE, 0, "%s", strerror(errno));
+
+				if(mkdir(btcpath, S_IRWXU) == -1 && errno != EEXIST) error(EXIT_FAILURE, errno, "couldn't create ~/.btcwatch");
+
 				fp = fopen(btcpathwf, "w");
 
 				if(!rates.got || strcmp(rates.currcy.name, currcy)) api_err = btc_fill_rates(&rates, currcy);