90 lines
2.3 KiB
Awk
90 lines
2.3 KiB
Awk
# Generate posix-conf-vars-def.h with definitions for CONF_DEF{CONF} for each
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# configuration variable that getconf or sysconf may use. Currently it is
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# equipped only to generate such macros for specification macros and for
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# SYSCONF macros in the _POSIX namespace.
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BEGIN {
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prefix = ""
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}
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$1 ~ /^#/ || $0 ~ /^\s*$/ {
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next
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}
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# Begin a new prefix.
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$NF == "{" {
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type = $1
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prefix = $2
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if (NF == 4)
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sc_prefix = $3
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else
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sc_prefix = "_SC"
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next
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}
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$1 == "}" {
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prefix = ""
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type = ""
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sc_prefix = ""
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next
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}
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{
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if (prefix == "" && type == "" && sc_prefix == "") {
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printf ("Syntax error at %s:%d\n", FILENAME, FNR) > "/dev/stderr"
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exit 1
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}
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# The prefix and variable names are indices and the value indicates what type
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# of variable it is. The possible options are:
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# CONFSTR: A configuration string
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# SYSCONF: A numeric value
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# SPEC: A specification
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sc_prefixes[prefix][$1] = sc_prefix
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conf[prefix][$1] = type
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}
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END {
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print "/* AUTOGENERATED by gen-posix-conf-vars.awk. DO NOT EDIT. */\n"
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# Generate macros that specify if a sysconf macro is defined and/or set.
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for (p in conf) {
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for (c in conf[p]) {
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printf "#ifndef _%s_%s\n", p, c
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printf "# define CONF_DEF_%s_%s CONF_DEF_UNDEFINED\n", p, c
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# CONFSTR have string values and they are not set or unset.
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if (conf[p][c] != "CONFSTR") {
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printf "#else\n"
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printf "# if _%s_%s > 0\n", p, c
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printf "# define CONF_DEF_%s_%s CONF_DEF_DEFINED_SET\n", p, c
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printf "# else\n"
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printf "# define CONF_DEF_%s_%s CONF_DEF_DEFINED_UNSET\n", p, c
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printf "# endif\n"
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}
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printf "#endif\n\n"
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# Build a name -> sysconf number associative array to print a C array at
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# the end.
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if (conf[p][c] == "SPEC") {
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name = sprintf ("%s_%s", p, c)
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num = sprintf ("%s_%s", sc_prefixes[p][c], c)
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spec[name] = num
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}
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}
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}
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# Print the specification array. Define the macro NEED_SPEC_ARRAY before
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# including posix-conf-vars.h to make it available in the compilation unit.
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print "#if NEED_SPEC_ARRAY"
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print "static const struct { const char *name; int num; } specs[] ="
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print " {"
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for (s in spec) {
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printf " { \"%s\", %s },\n", s, spec[s]
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}
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print " };"
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print "static const int nspecs = sizeof (specs) / sizeof (specs[0]);"
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print "#endif"
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}
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