/* * Mesa 3-D graphics library * Version: 6.5.2 * * Copyright (C) 2005-2006 Brian Paul All Rights Reserved. * * 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 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 * BRIAN PAUL 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. */ /** * \file slang_compile.c * slang front-end compiler * \author Michal Krol */ #include "imports.h" #include "context.h" #include "program.h" #include "prog_parameter.h" #include "grammar_mesa.h" #include "slang_codegen.h" #include "slang_compile.h" #include "slang_preprocess.h" #include "slang_storage.h" #include "slang_error.h" #include "slang_emit.h" #include "slang_vartable.h" #include "slang_simplify.h" #include "slang_print.h" /* * This is a straightforward implementation of the slang front-end * compiler. Lots of error-checking functionality is missing but * every well-formed shader source should compile successfully and * execute as expected. However, some semantically ill-formed shaders * may be accepted resulting in undefined behaviour. */ /** * Allocate storage for a variable of 'size' bytes from given pool. * Return the allocated address for the variable. */ static GLuint slang_var_pool_alloc(slang_var_pool * pool, unsigned int size) { const GLuint addr = pool->next_addr; pool->next_addr += size; return addr; } /* * slang_code_unit */ GLvoid _slang_code_unit_ctr(slang_code_unit * self, struct slang_code_object_ * object) { _slang_variable_scope_ctr(&self->vars); _slang_function_scope_ctr(&self->funs); _slang_struct_scope_ctr(&self->structs); self->object = object; } GLvoid _slang_code_unit_dtr(slang_code_unit * self) { slang_variable_scope_destruct(&self->vars); slang_function_scope_destruct(&self->funs); slang_struct_scope_destruct(&self->structs); } /* * slang_code_object */ GLvoid _slang_code_object_ctr(slang_code_object * self) { GLuint i; for (i = 0; i < SLANG_BUILTIN_TOTAL; i++) _slang_code_unit_ctr(&self->builtin[i], self); _slang_code_unit_ctr(&self->unit, self); self->varpool.next_addr = 0; slang_atom_pool_construct(&self->atompool); } GLvoid _slang_code_object_dtr(slang_code_object * self) { GLuint i; for (i = 0; i < SLANG_BUILTIN_TOTAL; i++) _slang_code_unit_dtr(&self->builtin[i]); _slang_code_unit_dtr(&self->unit); slang_atom_pool_destruct(&self->atompool); } /* slang_info_log */ static char *out_of_memory = "Error: Out of memory.\n"; void slang_info_log_construct(slang_info_log * log) { log->text = NULL; log->dont_free_text = 0; } void slang_info_log_destruct(slang_info_log * log) { if (!log->dont_free_text) slang_alloc_free(log->text); } static int slang_info_log_message(slang_info_log * log, const char *prefix, const char *msg) { GLuint size; if (log->dont_free_text) return 0; size = slang_string_length(msg) + 2; if (prefix != NULL) size += slang_string_length(prefix) + 2; if (log->text != NULL) { GLuint old_len = slang_string_length(log->text); log->text = (char *) slang_alloc_realloc(log->text, old_len + 1, old_len + size); } else { log->text = (char *) (slang_alloc_malloc(size)); if (log->text != NULL) log->text[0] = '\0'; } if (log->text == NULL) return 0; if (prefix != NULL) { slang_string_concat(log->text, prefix); slang_string_concat(log->text, ": "); } slang_string_concat(log->text, msg); slang_string_concat(log->text, "\n"); #if 1 abort(); /* XXX temporary */ #endif return 1; } int slang_info_log_print(slang_info_log * log, const char *msg, ...) { va_list va; char buf[1024]; va_start(va, msg); _mesa_vsprintf(buf, msg, va); va_end(va); return slang_info_log_message(log, NULL, buf); } int slang_info_log_error(slang_info_log * log, const char *msg, ...) { va_list va; char buf[1024]; va_start(va, msg); _mesa_vsprintf(buf, msg, va); va_end(va); if (slang_info_log_message(log, "Error", buf)) return 1; slang_info_log_memory(log); return 0; } int slang_info_log_warning(slang_info_log * log, const char *msg, ...) { va_list va; char buf[1024]; va_start(va, msg); _mesa_vsprintf(buf, msg, va); va_end(va); if (slang_info_log_message(log, "Warning", buf)) return 1; slang_info_log_memory(log); return 0; } void slang_info_log_memory(slang_info_log * log) { if (!slang_info_log_message(log, "Error", "Out of memory.")) { log->dont_free_text = 1; log->text = out_of_memory; } abort(); /* XXX temporary */ } /* slang_parse_ctx */ typedef struct slang_parse_ctx_ { const byte *I; slang_info_log *L; int parsing_builtin; GLboolean global_scope; /**< Is object being declared a global? */ slang_atom_pool *atoms; slang_unit_type type; /**< Vertex vs. Fragment */ } slang_parse_ctx; /* slang_output_ctx */ typedef struct slang_output_ctx_ { slang_variable_scope *vars; slang_function_scope *funs; slang_struct_scope *structs; slang_var_pool *global_pool; struct gl_program *program; slang_var_table *vartable; } slang_output_ctx; /* _slang_compile() */ static void parse_identifier_str(slang_parse_ctx * C, char **id) { *id = (char *) C->I; C->I += _mesa_strlen(*id) + 1; } static slang_atom parse_identifier(slang_parse_ctx * C) { const char *id; id = (const char *) C->I; C->I += _mesa_strlen(id) + 1; return slang_atom_pool_atom(C->atoms, id); } static int parse_number(slang_parse_ctx * C, int *number) { const int radix = (int) (*C->I++); *number = 0; while (*C->I != '\0') { int digit; if (*C->I >= '0' && *C->I <= '9') digit = (int) (*C->I - '0'); else if (*C->I >= 'A' && *C->I <= 'Z') digit = (int) (*C->I - 'A') + 10; else digit = (int) (*C->I - 'a') + 10; *number = *number * radix + digit; C->I++; } C->I++; if (*number > 65535) slang_info_log_warning(C->L, "%d: literal integer overflow.", *number); return 1; } static int parse_float(slang_parse_ctx * C, float *number) { char *integral = NULL; char *fractional = NULL; char *exponent = NULL; char *whole = NULL; parse_identifier_str(C, &integral); parse_identifier_str(C, &fractional); parse_identifier_str(C, &exponent); whole = (char *) (slang_alloc_malloc((_mesa_strlen(integral) + _mesa_strlen(fractional) + _mesa_strlen(exponent) + 3) * sizeof(char))); if (whole == NULL) { slang_info_log_memory(C->L); return 0; } slang_string_copy(whole, integral); slang_string_concat(whole, "."); slang_string_concat(whole, fractional); slang_string_concat(whole, "E"); slang_string_concat(whole, exponent); *number = (float) (_mesa_strtod(whole, (char **) NULL)); slang_alloc_free(whole); return 1; } /* revision number - increment after each change affecting emitted output */ #define REVISION 3 static int check_revision(slang_parse_ctx * C) { if (*C->I != REVISION) { slang_info_log_error(C->L, "Internal compiler error."); return 0; } C->I++; return 1; } static int parse_statement(slang_parse_ctx *, slang_output_ctx *, slang_operation *); static int parse_expression(slang_parse_ctx *, slang_output_ctx *, slang_operation *); static int parse_type_specifier(slang_parse_ctx *, slang_output_ctx *, slang_type_specifier *); static GLboolean parse_array_len(slang_parse_ctx * C, slang_output_ctx * O, GLuint * len) { slang_operation array_size; slang_name_space space; GLboolean result; if (!slang_operation_construct(&array_size)) return GL_FALSE; if (!parse_expression(C, O, &array_size)) { slang_operation_destruct(&array_size); return GL_FALSE; } space.funcs = O->funs; space.structs = O->structs; space.vars = O->vars; /* evaluate compile-time expression which is array size */ _slang_simplify(&array_size, &space, C->atoms); result = (array_size.type == SLANG_OPER_LITERAL_INT); slang_operation_destruct(&array_size); return result; } static GLboolean calculate_var_size(slang_parse_ctx * C, slang_output_ctx * O, slang_variable * var) { slang_storage_aggregate agg; if (!slang_storage_aggregate_construct(&agg)) return GL_FALSE; if (!_slang_aggregate_variable(&agg, &var->type.specifier, var->array_len, O->funs, O->structs, O->vars, C->atoms)) { slang_storage_aggregate_destruct(&agg); return GL_FALSE; } var->size = _slang_sizeof_aggregate(&agg); slang_storage_aggregate_destruct(&agg); return GL_TRUE; } static GLboolean convert_to_array(slang_parse_ctx * C, slang_variable * var, const slang_type_specifier * sp) { /* sized array - mark it as array, copy the specifier to the array element and * parse the expression */ var->type.specifier.type = SLANG_SPEC_ARRAY; var->type.specifier._array = (slang_type_specifier *) slang_alloc_malloc(sizeof(slang_type_specifier)); if (var->type.specifier._array == NULL) { slang_info_log_memory(C->L); return GL_FALSE; } slang_type_specifier_ctr(var->type.specifier._array); return slang_type_specifier_copy(var->type.specifier._array, sp); } /* structure field */ #define FIELD_NONE 0 #define FIELD_NEXT 1 #define FIELD_ARRAY 2 static GLboolean parse_struct_field_var(slang_parse_ctx * C, slang_output_ctx * O, slang_variable * var, const slang_type_specifier * sp) { var->a_name = parse_identifier(C); if (var->a_name == SLANG_ATOM_NULL) return GL_FALSE; switch (*C->I++) { case FIELD_NONE: if (!slang_type_specifier_copy(&var->type.specifier, sp)) return GL_FALSE; break; case FIELD_ARRAY: if (!convert_to_array(C, var, sp)) return GL_FALSE; if (!parse_array_len(C, O, &var->array_len)) return GL_FALSE; break; default: return GL_FALSE; } return calculate_var_size(C, O, var); } static int parse_struct_field(slang_parse_ctx * C, slang_output_ctx * O, slang_struct * st, slang_type_specifier * sp) { slang_output_ctx o = *O; o.structs = st->structs; if (!parse_type_specifier(C, &o, sp)) return 0; do { slang_variable *var = slang_variable_scope_grow(st->fields); if (!var) { slang_info_log_memory(C->L); return 0; } if (!parse_struct_field_var(C, &o, var, sp)) return 0; } while (*C->I++ != FIELD_NONE); return 1; } static int parse_struct(slang_parse_ctx * C, slang_output_ctx * O, slang_struct ** st) { slang_atom a_name; const char *name; /* parse struct name (if any) and make sure it is unique in current scope */ a_name = parse_identifier(C); if (a_name == SLANG_ATOM_NULL) return 0; name = slang_atom_pool_id(C->atoms, a_name); if (name[0] != '\0' && slang_struct_scope_find(O->structs, a_name, 0) != NULL) { slang_info_log_error(C->L, "%s: duplicate type name.", name); return 0; } /* set-up a new struct */ *st = (slang_struct *) slang_alloc_malloc(sizeof(slang_struct)); if (*st == NULL) { slang_info_log_memory(C->L); return 0; } if (!slang_struct_construct(*st)) { slang_alloc_free(*st); *st = NULL; slang_info_log_memory(C->L); return 0; } (**st).a_name = a_name; (**st).structs->outer_scope = O->structs; /* parse individual struct fields */ do { slang_type_specifier sp; slang_type_specifier_ctr(&sp); if (!parse_struct_field(C, O, *st, &sp)) { slang_type_specifier_dtr(&sp); return 0; } slang_type_specifier_dtr(&sp); } while (*C->I++ != FIELD_NONE); /* if named struct, copy it to current scope */ if (name[0] != '\0') { slang_struct *s; O->structs->structs = (slang_struct *) slang_alloc_realloc(O->structs->structs, O->structs->num_structs * sizeof(slang_struct), (O->structs->num_structs + 1) * sizeof(slang_struct)); if (O->structs->structs == NULL) { slang_info_log_memory(C->L); return 0; } s = &O->structs->structs[O->structs->num_structs]; if (!slang_struct_construct(s)) return 0; O->structs->num_structs++; if (!slang_struct_copy(s, *st)) return 0; } return 1; } /* type qualifier */ #define TYPE_QUALIFIER_NONE 0 #define TYPE_QUALIFIER_CONST 1 #define TYPE_QUALIFIER_ATTRIBUTE 2 #define TYPE_QUALIFIER_VARYING 3 #define TYPE_QUALIFIER_UNIFORM 4 #define TYPE_QUALIFIER_FIXEDOUTPUT 5 #define TYPE_QUALIFIER_FIXEDINPUT 6 static int parse_type_qualifier(slang_parse_ctx * C, slang_type_qualifier * qual) { switch (*C->I++) { case TYPE_QUALIFIER_NONE: *qual = SLANG_QUAL_NONE; break; case TYPE_QUALIFIER_CONST: *qual = SLANG_QUAL_CONST; break; case TYPE_QUALIFIER_ATTRIBUTE: *qual = SLANG_QUAL_ATTRIBUTE; break; case TYPE_QUALIFIER_VARYING: *qual = SLANG_QUAL_VARYING; break; case TYPE_QUALIFIER_UNIFORM: *qual = SLANG_QUAL_UNIFORM; break; case TYPE_QUALIFIER_FIXEDOUTPUT: *qual = SLANG_QUAL_FIXEDOUTPUT; break; case TYPE_QUALIFIER_FIXEDINPUT: *qual = SLANG_QUAL_FIXEDINPUT; break; default: return 0; } return 1; } /* type specifier */ #define TYPE_SPECIFIER_VOID 0 #define TYPE_SPECIFIER_BOOL 1 #define TYPE_SPECIFIER_BVEC2 2 #define TYPE_SPECIFIER_BVEC3 3 #define TYPE_SPECIFIER_BVEC4 4 #define TYPE_SPECIFIER_INT 5 #define TYPE_SPECIFIER_IVEC2 6 #define TYPE_SPECIFIER_IVEC3 7 #define TYPE_SPECIFIER_IVEC4 8 #define TYPE_SPECIFIER_FLOAT 9 #define TYPE_SPECIFIER_VEC2 10 #define TYPE_SPECIFIER_VEC3 11 #define TYPE_SPECIFIER_VEC4 12 #define TYPE_SPECIFIER_MAT2 13 #define TYPE_SPECIFIER_MAT3 14 #define TYPE_SPECIFIER_MAT4 15 #define TYPE_SPECIFIER_SAMPLER1D 16 #define TYPE_SPECIFIER_SAMPLER2D 17 #define TYPE_SPECIFIER_SAMPLER3D 18 #define TYPE_SPECIFIER_SAMPLERCUBE 19 #define TYPE_SPECIFIER_SAMPLER1DSHADOW 20 #define TYPE_SPECIFIER_SAMPLER2DSHADOW 21 #define TYPE_SPECIFIER_STRUCT 22 #define TYPE_SPECIFIER_TYPENAME 23 static int parse_type_specifier(slang_parse_ctx * C, slang_output_ctx * O, slang_type_specifier * spec) { switch (*C->I++) { case TYPE_SPECIFIER_VOID: spec->type = SLANG_SPEC_VOID; break; case TYPE_SPECIFIER_BOOL: spec->type = SLANG_SPEC_BOOL; break; case TYPE_SPECIFIER_BVEC2: spec->type = SLANG_SPEC_BVEC2; break; case TYPE_SPECIFIER_BVEC3: spec->type = SLANG_SPEC_BVEC3; break; case TYPE_SPECIFIER_BVEC4: spec->type = SLANG_SPEC_BVEC4; break; case TYPE_SPECIFIER_INT: spec->type = SLANG_SPEC_INT; break; case TYPE_SPECIFIER_IVEC2: spec->type = SLANG_SPEC_IVEC2; break; case TYPE_SPECIFIER_IVEC3: spec->type = SLANG_SPEC_IVEC3; break; case TYPE_SPECIFIER_IVEC4: spec->type = SLANG_SPEC_IVEC4; break; case TYPE_SPECIFIER_FLOAT: spec->type = SLANG_SPEC_FLOAT; break; case TYPE_SPECIFIER_VEC2: spec->type = SLANG_SPEC_VEC2; break; case TYPE_SPECIFIER_VEC3: spec->type = SLANG_SPEC_VEC3; break; case TYPE_SPECIFIER_VEC4: spec->type = SLANG_SPEC_VEC4; break; case TYPE_SPECIFIER_MAT2: spec->type = SLANG_SPEC_MAT2; break; case TYPE_SPECIFIER_MAT3: spec->type = SLANG_SPEC_MAT3; break; case TYPE_SPECIFIER_MAT4: spec->type = SLANG_SPEC_MAT4; break; case TYPE_SPECIFIER_SAMPLER1D: spec->type = SLANG_SPEC_SAMPLER1D; break; case TYPE_SPECIFIER_SAMPLER2D: spec->type = SLANG_SPEC_SAMPLER2D; break; case TYPE_SPECIFIER_SAMPLER3D: spec->type = SLANG_SPEC_SAMPLER3D; break; case TYPE_SPECIFIER_SAMPLERCUBE: spec->type = SLANG_SPEC_SAMPLERCUBE; break; case TYPE_SPECIFIER_SAMPLER1DSHADOW: spec->type = SLANG_SPEC_SAMPLER1DSHADOW; break; case TYPE_SPECIFIER_SAMPLER2DSHADOW: spec->type = SLANG_SPEC_SAMPLER2DSHADOW; break; case TYPE_SPECIFIER_STRUCT: spec->type = SLANG_SPEC_STRUCT; if (!parse_struct(C, O, &spec->_struct)) return 0; break; case TYPE_SPECIFIER_TYPENAME: spec->type = SLANG_SPEC_STRUCT; { slang_atom a_name; slang_struct *stru; a_name = parse_identifier(C); if (a_name == NULL) return 0; stru = slang_struct_scope_find(O->structs, a_name, 1); if (stru == NULL) { slang_info_log_error(C->L, "undeclared type name '%s'", slang_atom_pool_id(C->atoms, a_name)); return 0; } spec->_struct = (slang_struct *) slang_alloc_malloc(sizeof(slang_struct)); if (spec->_struct == NULL) { slang_info_log_memory(C->L); return 0; } if (!slang_struct_construct(spec->_struct)) { slang_alloc_free(spec->_struct); spec->_struct = NULL; return 0; } if (!slang_struct_copy(spec->_struct, stru)) return 0; } break; default: return 0; } return 1; } static int parse_fully_specified_type(slang_parse_ctx * C, slang_output_ctx * O, slang_fully_specified_type * type) { if (!parse_type_qualifier(C, &type->qualifier)) return 0; if (!parse_type_specifier(C, O, &type->specifier)) return 0; return 1; } /* operation */ #define OP_END 0 #define OP_BLOCK_BEGIN_NO_NEW_SCOPE 1 #define OP_BLOCK_BEGIN_NEW_SCOPE 2 #define OP_DECLARE 3 #define OP_ASM 4 #define OP_BREAK 5 #define OP_CONTINUE 6 #define OP_DISCARD 7 #define OP_RETURN 8 #define OP_EXPRESSION 9 #define OP_IF 10 #define OP_WHILE 11 #define OP_DO 12 #define OP_FOR 13 #define OP_PUSH_VOID 14 #define OP_PUSH_BOOL 15 #define OP_PUSH_INT 16 #define OP_PUSH_FLOAT 17 #define OP_PUSH_IDENTIFIER 18 #define OP_SEQUENCE 19 #define OP_ASSIGN 20 #define OP_ADDASSIGN 21 #define OP_SUBASSIGN 22 #define OP_MULASSIGN 23 #define OP_DIVASSIGN 24 /*#define OP_MODASSIGN 25*/ /*#define OP_LSHASSIGN 26*/ /*#define OP_RSHASSIGN 27*/ /*#define OP_ORASSIGN 28*/ /*#define OP_XORASSIGN 29*/ /*#define OP_ANDASSIGN 30*/ #define OP_SELECT 31 #define OP_LOGICALOR 32 #define OP_LOGICALXOR 33 #define OP_LOGICALAND 34 /*#define OP_BITOR 35*/ /*#define OP_BITXOR 36*/ /*#define OP_BITAND 37*/ #define OP_EQUAL 38 #define OP_NOTEQUAL 39 #define OP_LESS 40 #define OP_GREATER 41 #define OP_LESSEQUAL 42 #define OP_GREATEREQUAL 43 /*#define OP_LSHIFT 44*/ /*#define OP_RSHIFT 45*/ #define OP_ADD 46 #define OP_SUBTRACT 47 #define OP_MULTIPLY 48 #define OP_DIVIDE 49 /*#define OP_MODULUS 50*/ #define OP_PREINCREMENT 51 #define OP_PREDECREMENT 52 #define OP_PLUS 53 #define OP_MINUS 54 /*#define OP_COMPLEMENT 55*/ #define OP_NOT 56 #define OP_SUBSCRIPT 57 #define OP_CALL 58 #define OP_FIELD 59 #define OP_POSTINCREMENT 60 #define OP_POSTDECREMENT 61 /** * When parsing a compound production, this function is used to parse the * children. * For example, a a while-loop compound will have two children, the * while condition expression and the loop body. So, this function will * be called twice to parse those two sub-expressions. * \param C the parsing context * \param O the output context * \param oper the operation we're parsing * \param statement indicates whether parsing a statement, or expression * \return 1 if success, 0 if error */ static int parse_child_operation(slang_parse_ctx * C, slang_output_ctx * O, slang_operation * oper, GLboolean statement) { slang_operation *ch; /* grow child array */ ch = slang_operation_grow(&oper->num_children, &oper->children); if (statement) return parse_statement(C, O, ch); return parse_expression(C, O, ch); } static int parse_declaration(slang_parse_ctx * C, slang_output_ctx * O); static int parse_statement(slang_parse_ctx * C, slang_output_ctx * O, slang_operation * oper) { oper->locals->outer_scope = O->vars; switch (*C->I++) { case OP_BLOCK_BEGIN_NO_NEW_SCOPE: /* parse child statements, do not create new variable scope */ oper->type = SLANG_OPER_BLOCK_NO_NEW_SCOPE; while (*C->I != OP_END) if (!parse_child_operation(C, O, oper, 1)) return 0; C->I++; break; case OP_BLOCK_BEGIN_NEW_SCOPE: /* parse child statements, create new variable scope */ { slang_output_ctx o = *O; oper->type = SLANG_OPER_BLOCK_NEW_SCOPE; o.vars = oper->locals; while (*C->I != OP_END) if (!parse_child_operation(C, &o, oper, 1)) return 0; C->I++; } break; case OP_DECLARE: /* local variable declaration, individual declarators are stored as * children identifiers */ oper->type = SLANG_OPER_BLOCK_NO_NEW_SCOPE; { const unsigned int first_var = O->vars->num_variables; /* parse the declaration, note that there can be zero or more * than one declarators */ if (!parse_declaration(C, O)) return 0; if (first_var < O->vars->num_variables) { const unsigned int num_vars = O->vars->num_variables - first_var; unsigned int i; oper->num_children = num_vars; oper->children = slang_operation_new(num_vars); if (oper->children == NULL) { slang_info_log_memory(C->L); return 0; } for (i = first_var; i < O->vars->num_variables; i++) { slang_operation *o = &oper->children[i - first_var]; o->type = SLANG_OPER_VARIABLE_DECL; o->locals->outer_scope = O->vars; o->a_id = O->vars->variables[i]->a_name; } } } break; case OP_ASM: /* the __asm statement, parse the mnemonic and all its arguments * as expressions */ oper->type = SLANG_OPER_ASM; oper->a_id = parse_identifier(C); if (oper->a_id == SLANG_ATOM_NULL) return 0; while (*C->I != OP_END) { if (!parse_child_operation(C, O, oper, 0)) return 0; } C->I++; break; case OP_BREAK: oper->type = SLANG_OPER_BREAK; break; case OP_CONTINUE: oper->type = SLANG_OPER_CONTINUE; break; case OP_DISCARD: oper->type = SLANG_OPER_DISCARD; break; case OP_RETURN: oper->type = SLANG_OPER_RETURN; if (!parse_child_operation(C, O, oper, 0)) return 0; break; case OP_EXPRESSION: oper->type = SLANG_OPER_EXPRESSION; if (!parse_child_operation(C, O, oper, 0)) return 0; break; case OP_IF: oper->type = SLANG_OPER_IF; if (!parse_child_operation(C, O, oper, 0)) return 0; if (!parse_child_operation(C, O, oper, 1)) return 0; if (!parse_child_operation(C, O, oper, 1)) return 0; break; case OP_WHILE: { slang_output_ctx o = *O; oper->type = SLANG_OPER_WHILE; o.vars = oper->locals; if (!parse_child_operation(C, &o, oper, 1)) return 0; if (!parse_child_operation(C, &o, oper, 1)) return 0; } break; case OP_DO: oper->type = SLANG_OPER_DO; if (!parse_child_operation(C, O, oper, 1)) return 0; if (!parse_child_operation(C, O, oper, 0)) return 0; break; case OP_FOR: { slang_output_ctx o = *O; oper->type = SLANG_OPER_FOR; o.vars = oper->locals; if (!parse_child_operation(C, &o, oper, 1)) return 0; if (!parse_child_operation(C, &o, oper, 1)) return 0; if (!parse_child_operation(C, &o, oper, 0)) return 0; if (!parse_child_operation(C, &o, oper, 1)) return 0; } break; default: return 0; } return 1; } static int handle_nary_expression(slang_parse_ctx * C, slang_operation * op, slang_operation ** ops, unsigned int *total_ops, unsigned int n) { unsigned int i; op->children = (slang_operation *) slang_alloc_malloc(n * sizeof(slang_operation)); if (op->children == NULL) { slang_info_log_memory(C->L); return 0; } op->num_children = n; for (i = 0; i < n; i++) op->children[i] = (*ops)[*total_ops - (n + 1 - i)]; (*ops)[*total_ops - (n + 1)] = (*ops)[*total_ops - 1]; *total_ops -= n; *ops = (slang_operation *) slang_alloc_realloc(*ops, (*total_ops + n) * sizeof(slang_operation), *total_ops * sizeof(slang_operation)); if (*ops == NULL) { slang_info_log_memory(C->L); return 0; } return 1; } static int is_constructor_name(const char *name, slang_atom a_name, slang_struct_scope * structs) { if (slang_type_specifier_type_from_string(name) != SLANG_SPEC_VOID) return 1; return slang_struct_scope_find(structs, a_name, 1) != NULL; } static int parse_expression(slang_parse_ctx * C, slang_output_ctx * O, slang_operation * oper) { slang_operation *ops = NULL; unsigned int num_ops = 0; int number; while (*C->I != OP_END) { slang_operation *op; const unsigned int op_code = *C->I++; /* allocate default operation, becomes a no-op if not used */ ops = (slang_operation *) slang_alloc_realloc(ops, num_ops * sizeof(slang_operation), (num_ops + 1) * sizeof(slang_operation)); if (ops == NULL) { slang_info_log_memory(C->L); return 0; } op = &ops[num_ops]; if (!slang_operation_construct(op)) { slang_info_log_memory(C->L); return 0; } num_ops++; op->locals->outer_scope = O->vars; switch (op_code) { case OP_PUSH_VOID: op->type = SLANG_OPER_VOID; break; case OP_PUSH_BOOL: op->type = SLANG_OPER_LITERAL_BOOL; if (!parse_number(C, &number)) return 0; op->literal[0] = op->literal[1] = op->literal[2] = op->literal[3] = (GLfloat) number; op->literal_size = 1; break; case OP_PUSH_INT: op->type = SLANG_OPER_LITERAL_INT; if (!parse_number(C, &number)) return 0; op->literal[0] = op->literal[1] = op->literal[2] = op->literal[3] = (GLfloat) number; op->literal_size = 1; break; case OP_PUSH_FLOAT: op->type = SLANG_OPER_LITERAL_FLOAT; if (!parse_float(C, &op->literal[0])) return 0; op->literal[1] = op->literal[2] = op->literal[3] = op->literal[0]; op->literal_size = 1; break; case OP_PUSH_IDENTIFIER: op->type = SLANG_OPER_IDENTIFIER; op->a_id = parse_identifier(C); if (op->a_id == SLANG_ATOM_NULL) return 0; break; case OP_SEQUENCE: op->type = SLANG_OPER_SEQUENCE; if (!handle_nary_expression(C, op, &ops, &num_ops, 2)) return 0; break; case OP_ASSIGN: op->type = SLANG_OPER_ASSIGN; if (!handle_nary_expression(C, op, &ops, &num_ops, 2)) return 0; break; case OP_ADDASSIGN: op->type = SLANG_OPER_ADDASSIGN; if (!handle_nary_expression(C, op, &ops, &num_ops, 2)) return 0; break; case OP_SUBASSIGN: op->type = SLANG_OPER_SUBASSIGN; if (!handle_nary_expression(C, op, &ops, &num_ops, 2)) return 0; break; case OP_MULASSIGN: op->type = SLANG_OPER_MULASSIGN; if (!handle_nary_expression(C, op, &ops, &num_ops, 2)) return 0; break; case OP_DIVASSIGN: op->type = SLANG_OPER_DIVASSIGN; if (!handle_nary_expression(C, op, &ops, &num_ops, 2)) return 0; break; /*case OP_MODASSIGN: */ /*case OP_LSHASSIGN: */ /*case OP_RSHASSIGN: */ /*case OP_ORASSIGN: */ /*case OP_XORASSIGN: */ /*case OP_ANDASSIGN: */ case OP_SELECT: op->type = SLANG_OPER_SELECT; if (!handle_nary_expression(C, op, &ops, &num_ops, 3)) return 0; break; case OP_LOGICALOR: op->type = SLANG_OPER_LOGICALOR; if (!handle_nary_expression(C, op, &ops, &num_ops, 2)) return 0; break; case OP_LOGICALXOR: op->type = SLANG_OPER_LOGICALXOR; if (!handle_nary_expression(C, op, &ops, &num_ops, 2)) return 0; break; case OP_LOGICALAND: op->type = SLANG_OPER_LOGICALAND; if (!handle_nary_expression(C, op, &ops, &num_ops, 2)) return 0; break; /*case OP_BITOR: */ /*case OP_BITXOR: */ /*case OP_BITAND: */ case OP_EQUAL: op->type = SLANG_OPER_EQUAL; if (!handle_nary_expression(C, op, &ops, &num_ops, 2)) return 0; break; case OP_NOTEQUAL: op->type = SLANG_OPER_NOTEQUAL; if (!handle_nary_expression(C, op, &ops, &num_ops, 2)) return 0; break; case OP_LESS: op->type = SLANG_OPER_LESS; if (!handle_nary_expression(C, op, &ops, &num_ops, 2)) return 0; break; case OP_GREATER: op->type = SLANG_OPER_GREATER; if (!handle_nary_expression(C, op, &ops, &num_ops, 2)) return 0; break; case OP_LESSEQUAL: op->type = SLANG_OPER_LESSequal; if (!handle_nary_expression(C, op, &ops, &num_ops, 2)) return 0; break; case OP_GREATEREQUAL: op->type = SLANG_OPER_GREATERequal; if (!handle_nary_expression(C, op, &ops, &num_ops, 2)) return 0; break; /*case OP_LSHIFT: */ /*case OP_RSHIFT: */ case OP_ADD: op->type = SLANG_OPER_ADD; if (!handle_nary_expression(C, op, &ops, &num_ops, 2)) return 0; break; case OP_SUBTRACT: op->type = SLANG_OPER_SUBTRACT; if (!handle_nary_expression(C, op, &ops, &num_ops, 2)) return 0; break; case OP_MULTIPLY: op->type = SLANG_OPER_MULTIPLY; if (!handle_nary_expression(C, op, &ops, &num_ops, 2)) return 0; break; case OP_DIVIDE: op->type = SLANG_OPER_DIVIDE; if (!handle_nary_expression(C, op, &ops, &num_ops, 2)) return 0; break; /*case OP_MODULUS: */ case OP_PREINCREMENT: op->type = SLANG_OPER_PREINCREMENT; if (!handle_nary_expression(C, op, &ops, &num_ops, 1)) return 0; break; case OP_PREDECREMENT: op->type = SLANG_OPER_PREDECREMENT; if (!handle_nary_expression(C, op, &ops, &num_ops, 1)) return 0; break; case OP_PLUS: op->type = SLANG_OPER_PLUS; if (!handle_nary_expression(C, op, &ops, &num_ops, 1)) return 0; break; case OP_MINUS: op->type = SLANG_OPER_MINUS; if (!handle_nary_expression(C, op, &ops, &num_ops, 1)) return 0; break; case OP_NOT: op->type = SLANG_OPER_NOT; if (!handle_nary_expression(C, op, &ops, &num_ops, 1)) return 0; break; /*case OP_COMPLEMENT: */ case OP_SUBSCRIPT: op->type = SLANG_OPER_SUBSCRIPT; if (!handle_nary_expression(C, op, &ops, &num_ops, 2)) return 0; break; case OP_CALL: op->type = SLANG_OPER_CALL; op->a_id = parse_identifier(C); if (op->a_id == SLANG_ATOM_NULL) return 0; while (*C->I != OP_END) if (!parse_child_operation(C, O, op, 0)) return 0; C->I++; if (!C->parsing_builtin && !slang_function_scope_find_by_name(O->funs, op->a_id, 1)) { const char *id; id = slang_atom_pool_id(C->atoms, op->a_id); if (!is_constructor_name(id, op->a_id, O->structs)) { slang_info_log_error(C->L, "%s: undeclared function name.", id); return 0; } } break; case OP_FIELD: op->type = SLANG_OPER_FIELD; op->a_id = parse_identifier(C); if (op->a_id == SLANG_ATOM_NULL) return 0; if (!handle_nary_expression(C, op, &ops, &num_ops, 1)) return 0; break; case OP_POSTINCREMENT: op->type = SLANG_OPER_POSTINCREMENT; if (!handle_nary_expression(C, op, &ops, &num_ops, 1)) return 0; break; case OP_POSTDECREMENT: op->type = SLANG_OPER_POSTDECREMENT; if (!handle_nary_expression(C, op, &ops, &num_ops, 1)) return 0; break; default: return 0; } } C->I++; *oper = *ops; slang_alloc_free(ops); return 1; } /* parameter qualifier */ #define PARAM_QUALIFIER_IN 0 #define PARAM_QUALIFIER_OUT 1 #define PARAM_QUALIFIER_INOUT 2 /* function parameter array presence */ #define PARAMETER_ARRAY_NOT_PRESENT 0 #define PARAMETER_ARRAY_PRESENT 1 static int parse_parameter_declaration(slang_parse_ctx * C, slang_output_ctx * O, slang_variable * param) { /* parse and validate the parameter's type qualifiers (there can be * two at most) because not all combinations are valid */ if (!parse_type_qualifier(C, ¶m->type.qualifier)) return 0; switch (*C->I++) { case PARAM_QUALIFIER_IN: if (param->type.qualifier != SLANG_QUAL_CONST && param->type.qualifier != SLANG_QUAL_NONE) { slang_info_log_error(C->L, "Invalid type qualifier."); return 0; } break; case PARAM_QUALIFIER_OUT: if (param->type.qualifier == SLANG_QUAL_NONE) param->type.qualifier = SLANG_QUAL_OUT; else { slang_info_log_error(C->L, "Invalid type qualifier."); return 0; } break; case PARAM_QUALIFIER_INOUT: if (param->type.qualifier == SLANG_QUAL_NONE) param->type.qualifier = SLANG_QUAL_INOUT; else { slang_info_log_error(C->L, "Invalid type qualifier."); return 0; } break; default: return 0; } /* parse parameter's type specifier and name */ if (!parse_type_specifier(C, O, ¶m->type.specifier)) return 0; param->a_name = parse_identifier(C); if (param->a_name == SLANG_ATOM_NULL) return 0; /* if the parameter is an array, parse its size (the size must be * explicitly defined */ if (*C->I++ == PARAMETER_ARRAY_PRESENT) { slang_type_specifier p; slang_type_specifier_ctr(&p); if (!slang_type_specifier_copy(&p, ¶m->type.specifier)) { slang_type_specifier_dtr(&p); return GL_FALSE; } if (!convert_to_array(C, param, &p)) { slang_type_specifier_dtr(&p); return GL_FALSE; } slang_type_specifier_dtr(&p); if (!parse_array_len(C, O, ¶m->array_len)) return GL_FALSE; } /* calculate the parameter size */ if (!calculate_var_size(C, O, param)) return GL_FALSE; /* TODO: allocate the local address here? */ return 1; } /* function type */ #define FUNCTION_ORDINARY 0 #define FUNCTION_CONSTRUCTOR 1 #define FUNCTION_OPERATOR 2 /* function parameter */ #define PARAMETER_NONE 0 #define PARAMETER_NEXT 1 /* operator type */ #define OPERATOR_ADDASSIGN 1 #define OPERATOR_SUBASSIGN 2 #define OPERATOR_MULASSIGN 3 #define OPERATOR_DIVASSIGN 4 /*#define OPERATOR_MODASSIGN 5*/ /*#define OPERATOR_LSHASSIGN 6*/ /*#define OPERATOR_RSHASSIGN 7*/ /*#define OPERATOR_ANDASSIGN 8*/ /*#define OPERATOR_XORASSIGN 9*/ /*#define OPERATOR_ORASSIGN 10*/ #define OPERATOR_LOGICALXOR 11 /*#define OPERATOR_BITOR 12*/ /*#define OPERATOR_BITXOR 13*/ /*#define OPERATOR_BITAND 14*/ #define OPERATOR_LESS 15 #define OPERATOR_GREATER 16 #define OPERATOR_LESSEQUAL 17 #define OPERATOR_GREATEREQUAL 18 /*#define OPERATOR_LSHIFT 19*/ /*#define OPERATOR_RSHIFT 20*/ #define OPERATOR_MULTIPLY 21 #define OPERATOR_DIVIDE 22 /*#define OPERATOR_MODULUS 23*/ #define OPERATOR_INCREMENT 24 #define OPERATOR_DECREMENT 25 #define OPERATOR_PLUS 26 #define OPERATOR_MINUS 27 /*#define OPERATOR_COMPLEMENT 28*/ #define OPERATOR_NOT 29 static const struct { unsigned int o_code; const char *o_name; } operator_names[] = { {OPERATOR_INCREMENT, "++"}, {OPERATOR_ADDASSIGN, "+="}, {OPERATOR_PLUS, "+"}, {OPERATOR_DECREMENT, "--"}, {OPERATOR_SUBASSIGN, "-="}, {OPERATOR_MINUS, "-"}, {OPERATOR_NOT, "!"}, {OPERATOR_MULASSIGN, "*="}, {OPERATOR_MULTIPLY, "*"}, {OPERATOR_DIVASSIGN, "/="}, {OPERATOR_DIVIDE, "/"}, {OPERATOR_LESSEQUAL, "<="}, /*{ OPERATOR_LSHASSIGN, "<<=" }, */ /*{ OPERATOR_LSHIFT, "<<" }, */ {OPERATOR_LESS, "<"}, {OPERATOR_GREATEREQUAL, ">="}, /*{ OPERATOR_RSHASSIGN, ">>=" }, */ /*{ OPERATOR_RSHIFT, ">>" }, */ {OPERATOR_GREATER, ">"}, /*{ OPERATOR_MODASSIGN, "%=" }, */ /*{ OPERATOR_MODULUS, "%" }, */ /*{ OPERATOR_ANDASSIGN, "&=" }, */ /*{ OPERATOR_BITAND, "&" }, */ /*{ OPERATOR_ORASSIGN, "|=" }, */ /*{ OPERATOR_BITOR, "|" }, */ /*{ OPERATOR_COMPLEMENT, "~" }, */ /*{ OPERATOR_XORASSIGN, "^=" }, */ {OPERATOR_LOGICALXOR, "^^"}, /*{ OPERATOR_BITXOR, "^" } */ }; static slang_atom parse_operator_name(slang_parse_ctx * C) { unsigned int i; for (i = 0; i < sizeof(operator_names) / sizeof(*operator_names); i++) { if (operator_names[i].o_code == (unsigned int) (*C->I)) { slang_atom atom = slang_atom_pool_atom(C->atoms, operator_names[i].o_name); if (atom == SLANG_ATOM_NULL) { slang_info_log_memory(C->L); return 0; } C->I++; return atom; } } return 0; } static int parse_function_prototype(slang_parse_ctx * C, slang_output_ctx * O, slang_function * func) { /* parse function type and name */ if (!parse_fully_specified_type(C, O, &func->header.type)) return 0; switch (*C->I++) { case FUNCTION_ORDINARY: func->kind = SLANG_FUNC_ORDINARY; func->header.a_name = parse_identifier(C); if (func->header.a_name == SLANG_ATOM_NULL) return 0; break; case FUNCTION_CONSTRUCTOR: func->kind = SLANG_FUNC_CONSTRUCTOR; if (func->header.type.specifier.type == SLANG_SPEC_STRUCT) return 0; func->header.a_name = slang_atom_pool_atom(C->atoms, slang_type_specifier_type_to_string (func->header.type.specifier.type)); if (func->header.a_name == SLANG_ATOM_NULL) { slang_info_log_memory(C->L); return 0; } break; case FUNCTION_OPERATOR: func->kind = SLANG_FUNC_OPERATOR; func->header.a_name = parse_operator_name(C); if (func->header.a_name == SLANG_ATOM_NULL) return 0; break; default: return 0; } /* parse function parameters */ while (*C->I++ == PARAMETER_NEXT) { slang_variable *p = slang_variable_scope_grow(func->parameters); if (!p) { slang_info_log_memory(C->L); return 0; } if (!parse_parameter_declaration(C, O, p)) return 0; } /* if the function returns a value, append a hidden __retVal 'out' * parameter that corresponds to the return value. */ if (_slang_function_has_return_value(func)) { slang_variable *p = slang_variable_scope_grow(func->parameters); slang_atom a_retVal = slang_atom_pool_atom(C->atoms, "__retVal"); assert(a_retVal); p->a_name = a_retVal; p->type = func->header.type; p->type.qualifier = SLANG_QUAL_OUT; } /* function formal parameters and local variables share the same * scope, so save the information about param count in a seperate * place also link the scope to the global variable scope so when a * given identifier is not found here, the search process continues * in the global space */ func->param_count = func->parameters->num_variables; func->parameters->outer_scope = O->vars; return 1; } static int parse_function_definition(slang_parse_ctx * C, slang_output_ctx * O, slang_function * func) { slang_output_ctx o = *O; if (!parse_function_prototype(C, O, func)) return 0; /* create function's body operation */ func->body = (slang_operation *) slang_alloc_malloc(sizeof(slang_operation)); if (func->body == NULL) { slang_info_log_memory(C->L); return 0; } if (!slang_operation_construct(func->body)) { slang_alloc_free(func->body); func->body = NULL; slang_info_log_memory(C->L); return 0; } /* to parse the body the parse context is modified in order to * capture parsed variables into function's local variable scope */ C->global_scope = GL_FALSE; o.vars = func->parameters; if (!parse_statement(C, &o, func->body)) return 0; C->global_scope = GL_TRUE; return 1; } static GLboolean initialize_global(slang_assemble_ctx * A, slang_variable * var) { slang_operation op_id, op_assign; GLboolean result; /* construct the left side of assignment */ if (!slang_operation_construct(&op_id)) return GL_FALSE; op_id.type = SLANG_OPER_IDENTIFIER; op_id.a_id = var->a_name; /* put the variable into operation's scope */ op_id.locals->variables = (slang_variable **) slang_alloc_malloc(sizeof(slang_variable *)); if (op_id.locals->variables == NULL) { slang_operation_destruct(&op_id); return GL_FALSE; } op_id.locals->num_variables = 1; op_id.locals->variables[0] = var; /* construct the assignment expression */ if (!slang_operation_construct(&op_assign)) { op_id.locals->num_variables = 0; slang_operation_destruct(&op_id); return GL_FALSE; } op_assign.type = SLANG_OPER_ASSIGN; op_assign.children = (slang_operation *) slang_alloc_malloc(2 * sizeof(slang_operation)); if (op_assign.children == NULL) { slang_operation_destruct(&op_assign); op_id.locals->num_variables = 0; slang_operation_destruct(&op_id); return GL_FALSE; } op_assign.num_children = 2; op_assign.children[0] = op_id; op_assign.children[1] = *var->initializer; result = 1; /* carefully destroy the operations */ op_assign.num_children = 0; slang_alloc_free(op_assign.children); op_assign.children = NULL; slang_operation_destruct(&op_assign); op_id.locals->num_variables = 0; slang_operation_destruct(&op_id); if (!result) return GL_FALSE; return GL_TRUE; } /* init declarator list */ #define DECLARATOR_NONE 0 #define DECLARATOR_NEXT 1 /* variable declaration */ #define VARIABLE_NONE 0 #define VARIABLE_IDENTIFIER 1 #define VARIABLE_INITIALIZER 2 #define VARIABLE_ARRAY_EXPLICIT 3 #define VARIABLE_ARRAY_UNKNOWN 4 /** * Parse the initializer for a variable declaration. */ static int parse_init_declarator(slang_parse_ctx * C, slang_output_ctx * O, const slang_fully_specified_type * type) { slang_variable *var; /* empty init declatator (without name, e.g. "float ;") */ if (*C->I++ == VARIABLE_NONE) return 1; /* make room for the new variable and initialize it */ var = slang_variable_scope_grow(O->vars); if (!var) { slang_info_log_memory(C->L); return 0; } /* copy the declarator qualifier type, parse the identifier */ var->global = C->global_scope; var->type.qualifier = type->qualifier; var->a_name = parse_identifier(C); if (var->a_name == SLANG_ATOM_NULL) return 0; switch (*C->I++) { case VARIABLE_NONE: /* simple variable declarator - just copy the specifier */ if (!slang_type_specifier_copy(&var->type.specifier, &type->specifier)) return 0; break; case VARIABLE_INITIALIZER: /* initialized variable - copy the specifier and parse the expression */ if (!slang_type_specifier_copy(&var->type.specifier, &type->specifier)) return 0; var->initializer = (slang_operation *) slang_alloc_malloc(sizeof(slang_operation)); if (var->initializer == NULL) { slang_info_log_memory(C->L); return 0; } if (!slang_operation_construct(var->initializer)) { slang_alloc_free(var->initializer); var->initializer = NULL; slang_info_log_memory(C->L); return 0; } if (!parse_expression(C, O, var->initializer)) return 0; break; case VARIABLE_ARRAY_UNKNOWN: /* unsized array - mark it as array and copy the specifier to the array element */ if (!convert_to_array(C, var, &type->specifier)) return GL_FALSE; break; case VARIABLE_ARRAY_EXPLICIT: if (!convert_to_array(C, var, &type->specifier)) return GL_FALSE; if (!parse_array_len(C, O, &var->array_len)) return GL_FALSE; break; default: return 0; } /* emit code for global var decl */ if (C->global_scope) { slang_assemble_ctx A; A.atoms = C->atoms; A.space.funcs = O->funs; A.space.structs = O->structs; A.space.vars = O->vars; A.program = O->program; A.vartable = O->vartable; _slang_codegen_global_variable(&A, var, C->type); } /* allocate global address space for a variable with a known size */ if (C->global_scope && !(var->type.specifier.type == SLANG_SPEC_ARRAY && var->array_len == 0)) { if (!calculate_var_size(C, O, var)) return GL_FALSE; var->address = slang_var_pool_alloc(O->global_pool, var->size); } /* initialize global variable */ if (C->global_scope) { if (var->initializer != NULL) { slang_assemble_ctx A; A.atoms = C->atoms; A.space.funcs = O->funs; A.space.structs = O->structs; A.space.vars = O->vars; if (!initialize_global(&A, var)) return 0; } } return 1; } /** * Parse a list of variable declarations. Each variable may have an * initializer. */ static int parse_init_declarator_list(slang_parse_ctx * C, slang_output_ctx * O) { slang_fully_specified_type type; /* parse the fully specified type, common to all declarators */ if (!slang_fully_specified_type_construct(&type)) return 0; if (!parse_fully_specified_type(C, O, &type)) { slang_fully_specified_type_destruct(&type); return 0; } /* parse declarators, pass-in the parsed type */ do { if (!parse_init_declarator(C, O, &type)) { slang_fully_specified_type_destruct(&type); return 0; } } while (*C->I++ == DECLARATOR_NEXT); slang_fully_specified_type_destruct(&type); return 1; } /** * Parse a function definition or declaration. * \param C parsing context * \param O output context * \param definition if non-zero expect a definition, else a declaration * \param parsed_func_ret returns the parsed function * \return GL_TRUE if success, GL_FALSE if failure */ static GLboolean parse_function(slang_parse_ctx * C, slang_output_ctx * O, int definition, slang_function ** parsed_func_ret) { slang_function parsed_func, *found_func; /* parse function definition/declaration */ if (!slang_function_construct(&parsed_func)) return GL_FALSE; if (definition) { if (!parse_function_definition(C, O, &parsed_func)) { slang_function_destruct(&parsed_func); return GL_FALSE; } } else { if (!parse_function_prototype(C, O, &parsed_func)) { slang_function_destruct(&parsed_func); return GL_FALSE; } } /* find a function with a prototype matching the parsed one - only * the current scope is being searched to allow built-in function * overriding */ found_func = slang_function_scope_find(O->funs, &parsed_func, 0); if (found_func == NULL) { /* New function, add it to the function list */ O->funs->functions = (slang_function *) slang_alloc_realloc(O->funs->functions, O->funs->num_functions * sizeof(slang_function), (O->funs->num_functions + 1) * sizeof(slang_function)); if (O->funs->functions == NULL) { slang_info_log_memory(C->L); slang_function_destruct(&parsed_func); return GL_FALSE; } O->funs->functions[O->funs->num_functions] = parsed_func; O->funs->num_functions++; /* return the newly parsed function */ *parsed_func_ret = &O->funs->functions[O->funs->num_functions - 1]; } else { /* previously defined or declared */ /* TODO: check function return type qualifiers and specifiers */ if (definition) { if (found_func->body != NULL) { slang_info_log_error(C->L, "%s: function already has a body.", slang_atom_pool_id(C->atoms, parsed_func.header. a_name)); slang_function_destruct(&parsed_func); return GL_FALSE; } /* destroy the existing function declaration and replace it * with the new one, remember to save the fixup table */ parsed_func.fixups = found_func->fixups; slang_fixup_table_init(&found_func->fixups); slang_function_destruct(found_func); *found_func = parsed_func; } else { /* another declaration of the same function prototype - ignore it */ slang_function_destruct(&parsed_func); } /* return the found function */ *parsed_func_ret = found_func; } /* assemble the parsed function */ { slang_assemble_ctx A; A.atoms = C->atoms; A.space.funcs = O->funs; A.space.structs = O->structs; A.space.vars = O->vars; A.program = O->program; A.vartable = O->vartable; _slang_reset_error(); _slang_codegen_function(&A, *parsed_func_ret); } return GL_TRUE; } /* declaration */ #define DECLARATION_FUNCTION_PROTOTYPE 1 #define DECLARATION_INIT_DECLARATOR_LIST 2 static int parse_declaration(slang_parse_ctx * C, slang_output_ctx * O) { switch (*C->I++) { case DECLARATION_INIT_DECLARATOR_LIST: if (!parse_init_declarator_list(C, O)) return 0; break; case DECLARATION_FUNCTION_PROTOTYPE: { slang_function *dummy_func; if (!parse_function(C, O, 0, &dummy_func)) return 0; } break; default: return 0; } return 1; } /* external declaration */ #define EXTERNAL_NULL 0 #define EXTERNAL_FUNCTION_DEFINITION 1 #define EXTERNAL_DECLARATION 2 static GLboolean parse_code_unit(slang_parse_ctx * C, slang_code_unit * unit, struct gl_program *program) { GET_CURRENT_CONTEXT(ctx); slang_output_ctx o; GLboolean success; GLuint maxRegs; if (unit->type == SLANG_UNIT_FRAGMENT_BUILTIN || unit->type == SLANG_UNIT_FRAGMENT_SHADER) { maxRegs = ctx->Const.FragmentProgram.MaxTemps; } else { assert(unit->type == SLANG_UNIT_VERTEX_BUILTIN || unit->type == SLANG_UNIT_VERTEX_SHADER); maxRegs = ctx->Const.VertexProgram.MaxTemps; } /* setup output context */ o.funs = &unit->funs; o.structs = &unit->structs; o.vars = &unit->vars; o.global_pool = &unit->object->varpool; o.program = program; o.vartable = _slang_new_var_table(maxRegs); _slang_push_var_table(o.vartable); /* parse individual functions and declarations */ while (*C->I != EXTERNAL_NULL) { switch (*C->I++) { case EXTERNAL_FUNCTION_DEFINITION: { slang_function *func; success = parse_function(C, &o, 1, &func); } break; case EXTERNAL_DECLARATION: success = parse_declaration(C, &o); break; default: success = GL_FALSE; } if (!success) { /* xxx free codegen */ _slang_pop_var_table(o.vartable); return GL_FALSE; } } C->I++; _slang_pop_var_table(o.vartable); return GL_TRUE; } static GLboolean compile_binary(const byte * prod, slang_code_unit * unit, slang_unit_type type, slang_info_log * infolog, slang_code_unit * builtin, slang_code_unit * downlink, struct gl_program *program) { slang_parse_ctx C; unit->type = type; /* setup parse context */ C.I = prod; C.L = infolog; C.parsing_builtin = (builtin == NULL); C.global_scope = GL_TRUE; C.atoms = &unit->object->atompool; C.type = type; if (!check_revision(&C)) return GL_FALSE; if (downlink != NULL) { unit->vars.outer_scope = &downlink->vars; unit->funs.outer_scope = &downlink->funs; unit->structs.outer_scope = &downlink->structs; } /* parse translation unit */ return parse_code_unit(&C, unit, program); } static GLboolean compile_with_grammar(grammar id, const char *source, slang_code_unit * unit, slang_unit_type type, slang_info_log * infolog, slang_code_unit * builtin, struct gl_program *program) { byte *prod; GLuint size, start, version; slang_string preprocessed; /* First retrieve the version number. */ if (!_slang_preprocess_version(source, &version, &start, infolog)) return GL_FALSE; if (version > 110) { slang_info_log_error(infolog, "language version specified is not supported."); return GL_FALSE; } /* Now preprocess the source string. */ slang_string_init(&preprocessed); if (!_slang_preprocess_directives(&preprocessed, &source[start], infolog)) { slang_string_free(&preprocessed); slang_info_log_error(infolog, "failed to preprocess the source."); return GL_FALSE; } /* Finally check the syntax and generate its binary representation. */ if (!grammar_fast_check(id, (const byte *) (slang_string_cstr(&preprocessed)), &prod, &size, 65536)) { char buf[1024]; GLint pos; slang_string_free(&preprocessed); grammar_get_last_error((byte *) (buf), sizeof(buf), &pos); slang_info_log_error(infolog, buf); RETURN_ERROR("syntax error (possibly in library code)", 0); } slang_string_free(&preprocessed); /* Syntax is okay - translate it to internal representation. */ if (!compile_binary(prod, unit, type, infolog, builtin, &builtin[SLANG_BUILTIN_TOTAL - 1], program)) { grammar_alloc_free(prod); return GL_FALSE; } grammar_alloc_free(prod); return GL_TRUE; } LONGSTRING static const char *slang_shader_syn = #include "library/slang_shader_syn.h" ; static const byte slang_core_gc[] = { #include "library/slang_core_gc.h" }; static const byte slang_common_builtin_gc[] = { #include "library/slang_common_builtin_gc.h" }; static const byte slang_fragment_builtin_gc[] = { #include "library/slang_fragment_builtin_gc.h" }; static const byte slang_vertex_builtin_gc[] = { #include "library/slang_vertex_builtin_gc.h" }; static GLboolean compile_object(grammar * id, const char *source, slang_code_object * object, slang_unit_type type, slang_info_log * infolog, struct gl_program *program) { slang_code_unit *builtins = NULL; /* load GLSL grammar */ *id = grammar_load_from_text((const byte *) (slang_shader_syn)); if (*id == 0) { byte buf[1024]; int pos; grammar_get_last_error(buf, 1024, &pos); slang_info_log_error(infolog, (const char *) (buf)); return GL_FALSE; } /* set shader type - the syntax is slightly different for different shaders */ if (type == SLANG_UNIT_FRAGMENT_SHADER || type == SLANG_UNIT_FRAGMENT_BUILTIN) grammar_set_reg8(*id, (const byte *) "shader_type", 1); else grammar_set_reg8(*id, (const byte *) "shader_type", 2); /* enable language extensions */ grammar_set_reg8(*id, (const byte *) "parsing_builtin", 1); /* if parsing user-specified shader, load built-in library */ if (type == SLANG_UNIT_FRAGMENT_SHADER || type == SLANG_UNIT_VERTEX_SHADER) { /* compile core functionality first */ if (!compile_binary(slang_core_gc, &object->builtin[SLANG_BUILTIN_CORE], SLANG_UNIT_FRAGMENT_BUILTIN, infolog, NULL, NULL, NULL)) return GL_FALSE; /* compile common functions and variables, link to core */ if (!compile_binary(slang_common_builtin_gc, &object->builtin[SLANG_BUILTIN_COMMON], SLANG_UNIT_FRAGMENT_BUILTIN, infolog, NULL, &object->builtin[SLANG_BUILTIN_CORE], NULL)) return GL_FALSE; /* compile target-specific functions and variables, link to common */ if (type == SLANG_UNIT_FRAGMENT_SHADER) { if (!compile_binary(slang_fragment_builtin_gc, &object->builtin[SLANG_BUILTIN_TARGET], SLANG_UNIT_FRAGMENT_BUILTIN, infolog, NULL, &object->builtin[SLANG_BUILTIN_COMMON], NULL)) return GL_FALSE; } else if (type == SLANG_UNIT_VERTEX_SHADER) { if (!compile_binary(slang_vertex_builtin_gc, &object->builtin[SLANG_BUILTIN_TARGET], SLANG_UNIT_VERTEX_BUILTIN, infolog, NULL, &object->builtin[SLANG_BUILTIN_COMMON], NULL)) return GL_FALSE; } /* disable language extensions */ #if NEW_SLANG /* allow-built-ins */ grammar_set_reg8(*id, (const byte *) "parsing_builtin", 1); #else grammar_set_reg8(*id, (const byte *) "parsing_builtin", 0); #endif builtins = object->builtin; } /* compile the actual shader - pass-in built-in library for external shader */ return compile_with_grammar(*id, source, &object->unit, type, infolog, builtins, program); } static GLboolean compile_shader(GLcontext *ctx, slang_code_object * object, slang_unit_type type, slang_info_log * infolog, struct gl_shader *shader) { struct gl_program *program = shader->Programs[0]; GLboolean success; grammar id = 0; assert(program); _slang_code_object_dtr(object); _slang_code_object_ctr(object); success = compile_object(&id, shader->Source, object, type, infolog, program); if (id != 0) grammar_destroy(id); if (!success) return GL_FALSE; return GL_TRUE; } GLboolean _slang_compile(GLcontext *ctx, struct gl_shader *shader) { GLboolean success; slang_info_log info_log; slang_code_object obj; slang_unit_type type; if (shader->Type == GL_VERTEX_SHADER) { type = SLANG_UNIT_VERTEX_SHADER; } else { assert(shader->Type == GL_FRAGMENT_SHADER); type = SLANG_UNIT_FRAGMENT_SHADER; } /* XXX temporary hack */ if (!shader->Programs) { GLenum progTarget; if (shader->Type == GL_VERTEX_SHADER) progTarget = GL_VERTEX_PROGRAM_ARB; else progTarget = GL_FRAGMENT_PROGRAM_ARB; shader->Programs = (struct gl_program **) malloc(sizeof(struct gl_program*)); shader->Programs[0] = _mesa_new_program(ctx, progTarget, 1); shader->NumPrograms = 1; shader->Programs[0]->Parameters = _mesa_new_parameter_list(); shader->Programs[0]->Varying = _mesa_new_parameter_list(); shader->Programs[0]->Attributes = _mesa_new_parameter_list(); } slang_info_log_construct(&info_log); _slang_code_object_ctr(&obj); success = compile_shader(ctx, &obj, type, &info_log, shader); if (success) { #if 0 slang_create_uniforms(&object->expdata, shader); _mesa_print_program(program); _mesa_print_program_parameters(ctx, program); #endif } else { /* XXX more work on info log needed here */ if (info_log.text) { if (shader->InfoLog) { free(shader->InfoLog); shader->InfoLog = NULL; } shader->InfoLog = strdup(info_log.text); } } slang_info_log_destruct(&info_log); _slang_code_object_dtr(&obj); return success; }