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-rw-r--r--wcap/args.c265
1 files changed, 265 insertions, 0 deletions
diff --git a/wcap/args.c b/wcap/args.c
new file mode 100644
index 0000000..37ba778
--- /dev/null
+++ b/wcap/args.c
@@ -0,0 +1,265 @@
+/*
+ * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include "args.h"
+
+#ifdef _MSC_VER
+#define snprintf _snprintf
+#endif
+
+#if defined(__GNUC__) && __GNUC__
+extern void die(const char *fmt, ...) __attribute__((noreturn));
+#else
+extern void die(const char *fmt, ...);
+#endif
+
+
+struct arg arg_init(char **argv)
+{
+ struct arg a;
+
+ a.argv = argv;
+ a.argv_step = 1;
+ a.name = NULL;
+ a.val = NULL;
+ a.def = NULL;
+ return a;
+}
+
+int arg_match(struct arg *arg_, const struct arg_def *def, char **argv)
+{
+ struct arg arg;
+
+ if (!argv[0] || argv[0][0] != '-')
+ return 0;
+
+ arg = arg_init(argv);
+
+ if (def->short_name
+ && strlen(arg.argv[0]) == strlen(def->short_name) + 1
+ && !strcmp(arg.argv[0] + 1, def->short_name))
+ {
+
+ arg.name = arg.argv[0] + 1;
+ arg.val = def->has_val ? arg.argv[1] : NULL;
+ arg.argv_step = def->has_val ? 2 : 1;
+ }
+ else if (def->long_name)
+ {
+ const size_t name_len = strlen(def->long_name);
+
+ if (strlen(arg.argv[0]) >= name_len + 2
+ && arg.argv[0][1] == '-'
+ && !strncmp(arg.argv[0] + 2, def->long_name, name_len)
+ && (arg.argv[0][name_len+2] == '='
+ || arg.argv[0][name_len+2] == '\0'))
+ {
+
+ arg.name = arg.argv[0] + 2;
+ arg.val = arg.name[name_len] == '=' ? arg.name + name_len + 1 : NULL;
+ arg.argv_step = 1;
+ }
+ }
+
+ if (arg.name && !arg.val && def->has_val)
+ die("Error: option %s requires argument.\n", arg.name);
+
+ if (arg.name && arg.val && !def->has_val)
+ die("Error: option %s requires no argument.\n", arg.name);
+
+ if (arg.name
+ && (arg.val || !def->has_val))
+ {
+ arg.def = def;
+ *arg_ = arg;
+ return 1;
+ }
+
+ return 0;
+}
+
+
+const char *arg_next(struct arg *arg)
+{
+ if (arg->argv[0])
+ arg->argv += arg->argv_step;
+
+ return *arg->argv;
+}
+
+
+char **argv_dup(int argc, const char **argv)
+{
+ char **new_argv = malloc((argc + 1) * sizeof(*argv));
+
+ memcpy(new_argv, argv, argc * sizeof(*argv));
+ new_argv[argc] = NULL;
+ return new_argv;
+}
+
+
+void arg_show_usage(FILE *fp, const struct arg_def *const *defs)
+{
+ char option_text[40] = {0};
+
+ for (; *defs; defs++)
+ {
+ const struct arg_def *def = *defs;
+ char *short_val = def->has_val ? " <arg>" : "";
+ char *long_val = def->has_val ? "=<arg>" : "";
+
+ if (def->short_name && def->long_name)
+ {
+ char *comma = def->has_val ? "," : ", ";
+
+ snprintf(option_text, 37, "-%s%s%s --%s%6s",
+ def->short_name, short_val, comma,
+ def->long_name, long_val);
+ }
+ else if (def->short_name)
+ snprintf(option_text, 37, "-%s%s",
+ def->short_name, short_val);
+ else if (def->long_name)
+ snprintf(option_text, 37, " --%s%s",
+ def->long_name, long_val);
+
+ fprintf(fp, " %-37s\t%s\n", option_text, def->desc);
+
+ if(def->enums)
+ {
+ const struct arg_enum_list *listptr;
+
+ fprintf(fp, " %-37s\t ", "");
+
+ for(listptr = def->enums; listptr->name; listptr++)
+ fprintf(fp, "%s%s", listptr->name,
+ listptr[1].name ? ", " : "\n");
+ }
+ }
+}
+
+
+unsigned int arg_parse_uint(const struct arg *arg)
+{
+ long int rawval;
+ char *endptr;
+
+ rawval = strtol(arg->val, &endptr, 10);
+
+ if (arg->val[0] != '\0' && endptr[0] == '\0')
+ {
+ if (rawval >= 0 && rawval <= UINT_MAX)
+ return rawval;
+
+ die("Option %s: Value %ld out of range for unsigned int\n",
+ arg->name, rawval);
+ }
+
+ die("Option %s: Invalid character '%c'\n", arg->name, *endptr);
+ return 0;
+}
+
+
+int arg_parse_int(const struct arg *arg)
+{
+ long int rawval;
+ char *endptr;
+
+ rawval = strtol(arg->val, &endptr, 10);
+
+ if (arg->val[0] != '\0' && endptr[0] == '\0')
+ {
+ if (rawval >= INT_MIN && rawval <= INT_MAX)
+ return rawval;
+
+ die("Option %s: Value %ld out of range for signed int\n",
+ arg->name, rawval);
+ }
+
+ die("Option %s: Invalid character '%c'\n", arg->name, *endptr);
+ return 0;
+}
+
+
+struct vpx_rational
+{
+ int num; /**< fraction numerator */
+ int den; /**< fraction denominator */
+};
+struct vpx_rational arg_parse_rational(const struct arg *arg)
+{
+ long int rawval;
+ char *endptr;
+ struct vpx_rational rat;
+
+ /* parse numerator */
+ rawval = strtol(arg->val, &endptr, 10);
+
+ if (arg->val[0] != '\0' && endptr[0] == '/')
+ {
+ if (rawval >= INT_MIN && rawval <= INT_MAX)
+ rat.num = rawval;
+ else die("Option %s: Value %ld out of range for signed int\n",
+ arg->name, rawval);
+ }
+ else die("Option %s: Expected / at '%c'\n", arg->name, *endptr);
+
+ /* parse denominator */
+ rawval = strtol(endptr + 1, &endptr, 10);
+
+ if (arg->val[0] != '\0' && endptr[0] == '\0')
+ {
+ if (rawval >= INT_MIN && rawval <= INT_MAX)
+ rat.den = rawval;
+ else die("Option %s: Value %ld out of range for signed int\n",
+ arg->name, rawval);
+ }
+ else die("Option %s: Invalid character '%c'\n", arg->name, *endptr);
+
+ return rat;
+}
+
+
+int arg_parse_enum(const struct arg *arg)
+{
+ const struct arg_enum_list *listptr;
+ long int rawval;
+ char *endptr;
+
+ /* First see if the value can be parsed as a raw value */
+ rawval = strtol(arg->val, &endptr, 10);
+ if (arg->val[0] != '\0' && endptr[0] == '\0')
+ {
+ /* Got a raw value, make sure it's valid */
+ for(listptr = arg->def->enums; listptr->name; listptr++)
+ if(listptr->val == rawval)
+ return rawval;
+ }
+
+ /* Next see if it can be parsed as a string */
+ for(listptr = arg->def->enums; listptr->name; listptr++)
+ if(!strcmp(arg->val, listptr->name))
+ return listptr->val;
+
+ die("Option %s: Invalid value '%s'\n", arg->name, arg->val);
+ return 0;
+}
+
+
+int arg_parse_enum_or_int(const struct arg *arg)
+{
+ if(arg->def->enums)
+ return arg_parse_enum(arg);
+ return arg_parse_int(arg);
+}