/**************************************************************************** * tools/cfgdefine.c * * Copyright (C) 2007-2013 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include "cfgdefine.h" /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /**************************************************************************** * Public Data ****************************************************************************/ char line[LINESIZE+1]; /**************************************************************************** * Private Data ****************************************************************************/ /* These are configuration variable name that are quoted by configuration tool * but which must be unquoted when used in C code. */ static const char *dequote_list[] = { /* NuttX */ "CONFIG_USER_ENTRYPOINT", /* Name of entry point function */ "CONFIG_EXECFUNCS_SYMTAB_ARRAY", /* Symbol table array used by exec[l|v] */ "CONFIG_EXECFUNCS_NSYMBOLS_VAR", /* Variable holding number of symbols in the table */ "CONFIG_MODLIB_SYMTAB_ARRAY", /* Symbol table array used by dllfcn[l|v] */ "CONFIG_MODLIB_NSYMBOLS_VAR", /* Variable holding number of symbols in the table */ "CONFIG_PASS1_BUILDIR", /* Pass1 build directory */ "CONFIG_PASS1_TARGET", /* Pass1 build target */ "CONFIG_PASS1_OBJECT", /* Pass1 build object */ "CONFIG_DEBUG_OPTLEVEL", /* Custom debug level */ "CONFIG_INIT_SYMTAB", /* Global symbol table */ "CONFIG_INIT_NEXPORTS", /* Global symbol table size */ /* NxWidgets/NxWM */ "CONFIG_NXWM_BACKGROUND_IMAGE", /* Name of bitmap image class */ "CONFIG_NXWM_STOP_BITMAP", /* Name of bitmap image class */ "CONFIG_NXWM_MINIMIZE_BITMAP", /* Name of bitmap image class */ "CONFIG_NXWM_STARTWINDOW_ICON", /* Name of bitmap image class */ "CONFIG_NXWM_NXTERM_ICON", /* Name of bitmap image class */ "CONFIG_NXWM_CALIBRATION_ICON", /* Name of bitmap image class */ "CONFIG_NXWM_HEXCALCULATOR_ICON", /* Name of bitmap image class */ /* apps/ definitions */ "CONFIG_EXAMPLES_HELLO_PROGNAME", /* Name of installed hello example program */ "CONFIG_SYSTEM_NSH_PROGNAME", /* Name of installed NSH example program */ "CONFIG_SYSTEM_NSH_SYMTAB_ARRAYNAME", /* Symbol table array name */ "CONFIG_SYSTEM_NSH_SYMTAB_COUNTNAME", /* Name of the variable holding the number of symbols */ "CONFIG_THTTPD_INDEX_NAMES", /* List of index file names */ NULL /* Marks the end of the list */ }; /**************************************************************************** * Private Functions ****************************************************************************/ /* Skip over any spaces */ static char *skip_space(char *ptr) { while (*ptr && isspace((int)*ptr)) ptr++; return ptr; } /* Find the end of a variable string */ static char *find_name_end(char *ptr) { while (*ptr && (isalnum((int)*ptr) || *ptr == '_')) ptr++; return ptr; } /* Find the end of a value string */ static char *find_value_end(char *ptr) { while (*ptr && !isspace((int)*ptr)) { if (*ptr == '"') { do ptr++; while (*ptr && *ptr != '"'); if (*ptr) ptr++; } else { do ptr++; while (*ptr && !isspace((int)*ptr) && *ptr != '"'); } } return ptr; } /* Read the next line from the configuration file */ static char *read_line(FILE *stream) { char *ptr; for (;;) { line[LINESIZE] = '\0'; if (!fgets(line, LINESIZE, stream)) { return NULL; } else { ptr = skip_space(line); if (*ptr && *ptr != '#' && *ptr != '\n') { return ptr; } } } } /* Parse the line from the configuration file into a variable name * string and a value string. */ static void parse_line(char *ptr, char **varname, char **varval) { /* Skip over any leading spaces */ ptr = skip_space(ptr); /* The first no-space is the beginning of the variable name */ *varname = skip_space(ptr); *varval = NULL; /* Parse to the end of the variable name */ ptr = find_name_end(ptr); /* An equal sign is expected next, perhaps after some white space */ if (*ptr && *ptr != '=') { /* Some else follows the variable name. Terminate the variable * name and skip over any spaces. */ *ptr = '\0'; ptr = skip_space(ptr + 1); } /* Verify that the equal sign is present */ if (*ptr == '=') { /* Make sure that the variable name is terminated (this was already * done if the name was followed by white space. */ *ptr = '\0'; /* The variable value should follow =, perhaps separated by some * white space. */ ptr = skip_space(ptr + 1); if (*ptr) { /* Yes.. a variable follows. Save the pointer to the start * of the variable string. */ *varval = ptr; /* Find the end of the variable string and make sure that it * is terminated. */ ptr = find_value_end(ptr); *ptr = '\0'; } } } static char *dequote_value(const char *varname, char *varval) { const char **dqnam; char *dqval = varval; char *ptr; int len; int i; if (dqval) { /* Check if the variable name is in the list of strings to be dequoated */ for (dqnam = dequote_list; *dqnam; dqnam++) { if (strcmp(*dqnam, varname) == 0) { break; } } /* Did we find the variable name in the list of configuration variables * to be dequoted? */ if (*dqnam) { /* Yes... Check if there is a trailing quote */ len = strlen(dqval); if (dqval[len-1] == '"') { /* Yes... replace it with a terminator */ dqval[len-1] = '\0'; len--; } /* Is there a leading quote? */ if (dqval[0] == '"') { /* Yes.. skip over the leading quote */ dqval++; len--; } /* A special case is a quoted list of quoted strings. In that case * we will need to remove the backspaces from the internally quoted * strings. NOTE: this will not handle nested quoted quotes. */ for (ptr = dqval; *ptr; ptr++) { /* Check for a quoted quote */ if (ptr[0] == '\\' && ptr[1] == '"') { /* Delete the backslash by moving the rest of the string */ for (i = 0; ptr[i]; i++) { ptr[i] = ptr[i+1]; } len--; } } /* Handle the case where nothing is left after dequoting */ if (len <= 0) { dqval = NULL; } } } return dqval; } /**************************************************************************** * Public Functions ****************************************************************************/ void generate_definitions(FILE *stream) { char *varname; char *varval; char *ptr; /* Loop until the entire file has been parsed. */ do { /* Read the next line from the file */ ptr = read_line(stream); if (ptr) { /* Parse the line into a variable and a value field */ parse_line(ptr, &varname, &varval); /* Was a variable name found? */ if (varname) { /* Yes.. dequote the value if necessary */ varval = dequote_value(varname, varval); /* If no value was provided or if the special value 'n' was provided, * then undefine the configuration variable. */ if (!varval || strcmp(varval, "n") == 0) { printf("#undef %s\n", varname); } /* Simply define the configuration variable if it has the special * value "y" */ else if (strcmp(varval, "y") == 0) { printf("#define %s 1\n", varname); } /* Otherwise, use the value as provided */ else { printf("#define %s %s\n", varname, varval); } } } } while (ptr); }