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Timothy B. Terriberry authored
The primary goal is to allow a binary to be built which supports NEON, but can fall back to non-NEON routines, since some Android devices do not have NEON, even if they are otherwise ARMv7 (e.g., Tegra). The configure-generated flags HAVE_ARMV7, etc., are used to decide which versions of each function to build, and when CONFIG_RUNTIME_CPU_DETECT is enabled, the correct version is chosen at run time. In order for this to work, the CFLAGS must be set to something appropriate (e.g., without -mfpu=neon for ARMv7, and with appropriate -march and -mcpu for even earlier configurations), or the native C code will not be able to run. The ASFLAGS must remain set for the most advanced instruction set required at build time, since the ARM assembler will refuse to emit them otherwise. I have not attempted to make any changes to configure to do this automatically. Doing so will probably require the addition of new configure options. Many of the hooks for RTCD on A...
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/* * 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));#elseextern void die(const char *fmt, ...);#endifstruct 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);7172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140
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;
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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) {
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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);
}