SVF: insert space before '(' and after ')'

See http://forum.sparkfun.com/viewtopic.php?p=90983#90983 for discussion;
basically, the SVF parser wrongly expects "TDI (123)" but the space is
optional and it should accept "TDI(123)" too.

In the same way, "TDI(123)TDO(456)" should work too.

Rather than update the command parsing, this just makes sure the expected
spaces are present.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>

diff --git a/src/svf/svf.c b/src/svf/svf.c
index 7cb220073f3d00ff246e9136dd352031cbacc386..275bced8eca39355ffd8fea07eee3302fada9894 100644 (file)
--- a/src/svf/svf.c
+++ b/src/svf/svf.c
@@ -504,27 +504,49 @@ static int svf_read_command_from_file(int fd)
                default:
                        if (!comment)
                        {
-                               if (cmd_pos >= svf_command_buffer_size - 1)
+                               /* The parsing code currently expects a space
+                                * before parentheses -- "TDI (123)".  Also a
+                                * space afterwards -- "TDI (123) TDO(456)".
+                                * But such spaces are optional... instead of
+                                * parser updates, cope with that by adding the
+                                * spaces as needed.
+                                *
+                                * Ensure there are 3 bytes available, for:
+                                *  - current character
+                                *  - added space.
+                                *  - terminating NUL ('\0')
+                                */
+                               if ((cmd_pos + 2) >= svf_command_buffer_size)
                                {
-                                       tmp_buffer = (char*)malloc(svf_command_buffer_size + SVFP_CMD_INC_CNT);         // 1 more byte for '\0'
+                                       /* REVISIT use realloc(); simpler */
+                                       tmp_buffer = malloc(
+                                                       svf_command_buffer_size
+                                                       + SVFP_CMD_INC_CNT);
                                        if (NULL == tmp_buffer)
                                        {
                                                LOG_ERROR("not enough memory");
                                                return ERROR_FAIL;
                                        }
                                        if (svf_command_buffer_size > 0)
-                                       {
-                                               memcpy(tmp_buffer, svf_command_buffer, svf_command_buffer_size);
-                                       }
+                                               memcpy(tmp_buffer,
+                                                       svf_command_buffer,
+                                                       svf_command_buffer_size);
                                        if (svf_command_buffer != NULL)
-                                       {
                                                free(svf_command_buffer);
-                                       }
                                        svf_command_buffer = tmp_buffer;
                                        svf_command_buffer_size += SVFP_CMD_INC_CNT;
                                        tmp_buffer = NULL;
                                }
+
+                               /* insert a space before '(' */
+                               if ('(' == ch)
+                                       svf_command_buffer[cmd_pos++] = ' ';
+
                                svf_command_buffer[cmd_pos++] = (char)toupper(ch);
+
+                               /* insert a space after ')' */
+                               if (')' == ch)
+                                       svf_command_buffer[cmd_pos++] = ' ';
                        }
                        break;
                }