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Diffstat (limited to 'src/compiler/glsl/glcpp/glcpp.c')
-rw-r--r-- | src/compiler/glsl/glcpp/glcpp.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/src/compiler/glsl/glcpp/glcpp.c b/src/compiler/glsl/glcpp/glcpp.c new file mode 100644 index 0000000..c62f4ef --- /dev/null +++ b/src/compiler/glsl/glcpp/glcpp.c @@ -0,0 +1,182 @@ +/* + * Copyright © 2010 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#include <stdio.h> +#include <string.h> +#include <errno.h> +#include <getopt.h> + +#include "glcpp.h" +#include "main/mtypes.h" +#include "main/shaderobj.h" +#include "util/strtod.h" + +extern int glcpp_parser_debug; + +void +_mesa_reference_shader(struct gl_context *ctx, struct gl_shader **ptr, + struct gl_shader *sh) +{ + (void) ctx; + *ptr = sh; +} + +/* Read from fp until EOF and return a string of everything read. + */ +static char * +load_text_fp (void *ctx, FILE *fp) +{ +#define CHUNK 4096 + char *text = NULL; + size_t text_size = 0; + size_t total_read = 0; + size_t bytes; + + while (1) { + if (total_read + CHUNK + 1 > text_size) { + text_size = text_size ? text_size * 2 : CHUNK + 1; + text = reralloc_size (ctx, text, text_size); + if (text == NULL) { + fprintf (stderr, "Out of memory\n"); + return NULL; + } + } + bytes = fread (text + total_read, 1, CHUNK, fp); + total_read += bytes; + + if (bytes < CHUNK) { + break; + } + } + + text[total_read] = '\0'; + + return text; +} + +static char * +load_text_file(void *ctx, const char *filename) +{ + char *text; + FILE *fp; + + if (filename == NULL || strcmp (filename, "-") == 0) + return load_text_fp (ctx, stdin); + + fp = fopen (filename, "r"); + if (fp == NULL) { + fprintf (stderr, "Failed to open file %s: %s\n", + filename, strerror (errno)); + return NULL; + } + + text = load_text_fp (ctx, fp); + + fclose(fp); + + return text; +} + +/* Initialize only those things that glcpp cares about. + */ +static void +init_fake_gl_context (struct gl_context *gl_ctx) +{ + gl_ctx->API = API_OPENGL_COMPAT; + gl_ctx->Const.DisableGLSLLineContinuations = false; +} + +static void +usage (void) +{ + fprintf (stderr, + "Usage: glcpp [OPTIONS] [--] [<filename>]\n" + "\n" + "Pre-process the given filename (stdin if no filename given).\n" + "The following options are supported:\n" + " --disable-line-continuations Do not interpret lines ending with a\n" + " backslash ('\\') as a line continuation.\n"); +} + +enum { + DISABLE_LINE_CONTINUATIONS_OPT = CHAR_MAX + 1 +}; + +static const struct option +long_options[] = { + {"disable-line-continuations", no_argument, 0, DISABLE_LINE_CONTINUATIONS_OPT }, + {"debug", no_argument, 0, 'd'}, + {0, 0, 0, 0 } +}; + +int +main (int argc, char *argv[]) +{ + char *filename = NULL; + void *ctx = ralloc(NULL, void*); + char *info_log = ralloc_strdup(ctx, ""); + const char *shader; + int ret; + struct gl_context gl_ctx; + int c; + + init_fake_gl_context (&gl_ctx); + + while ((c = getopt_long(argc, argv, "d", long_options, NULL)) != -1) { + switch (c) { + case DISABLE_LINE_CONTINUATIONS_OPT: + gl_ctx.Const.DisableGLSLLineContinuations = true; + break; + case 'd': + glcpp_parser_debug = 1; + break; + default: + usage (); + exit (1); + } + } + + if (optind + 1 < argc) { + printf ("Unexpected argument: %s\n", argv[optind+1]); + usage (); + exit (1); + } + if (optind < argc) { + filename = argv[optind]; + } + + shader = load_text_file (ctx, filename); + if (shader == NULL) + return 1; + + _mesa_locale_init(); + + ret = glcpp_preprocess(ctx, &shader, &info_log, NULL, &gl_ctx); + + printf("%s", shader); + fprintf(stderr, "%s", info_log); + + ralloc_free(ctx); + + return ret; +} |