--- /dev/null
+// stb_include.h - v0.02 - parse and process #include directives - public domain
+//
+// To build this, in one source file that includes this file do
+// #define STB_INCLUDE_IMPLEMENTATION
+//
+// This program parses a string and replaces lines of the form
+// #include "foo"
+// with the contents of a file named "foo". It also embeds the
+// appropriate #line directives. Note that all include files must
+// reside in the location specified in the path passed to the API;
+// it does not check multiple directories.
+//
+// If the string contains a line of the form
+// #inject
+// then it will be replaced with the contents of the string 'inject' passed to the API.
+//
+// Options:
+//
+// Define STB_INCLUDE_LINE_GLSL to get GLSL-style #line directives
+// which use numbers instead of filenames.
+//
+// Define STB_INCLUDE_LINE_NONE to disable output of #line directives.
+//
+// Standard libraries:
+//
+// stdio.h FILE, fopen, fclose, fseek, ftell
+// stdlib.h malloc, realloc, free
+// string.h strcpy, strncmp, memcpy
+//
+// Credits:
+//
+// Written by Sean Barrett.
+//
+// Fixes:
+// Michal Klos
+
+#ifndef STB_INCLUDE_STB_INCLUDE_H
+#define STB_INCLUDE_STB_INCLUDE_H
+
+// Do include-processing on the string 'str'. To free the return value, pass it to free()
+char *stb_include_string(char *str, char *inject, char *path_to_includes, char *filename_for_line_directive, char error[256]);
+
+// Concatenate the strings 'strs' and do include-processing on the result. To free the return value, pass it to free()
+char *stb_include_strings(char **strs, int count, char *inject, char *path_to_includes, char *filename_for_line_directive, char error[256]);
+
+// Load the file 'filename' and do include-processing on the string therein. note that
+// 'filename' is opened directly; 'path_to_includes' is not used. To free the return value, pass it to free()
+char *stb_include_file(char *filename, char *inject, char *path_to_includes, char error[256]);
+
+#endif
+
+
+#ifdef STB_INCLUDE_IMPLEMENTATION
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static char *stb_include_load_file(char *filename, size_t *plen)
+{
+ char *text;
+ size_t len;
+ FILE *f = fopen(filename, "rb");
+ if (f == 0) return 0;
+ fseek(f, 0, SEEK_END);
+ len = (size_t) ftell(f);
+ if (plen) *plen = len;
+ text = (char *) malloc(len+1);
+ if (text == 0) return 0;
+ fseek(f, 0, SEEK_SET);
+ fread(text, 1, len, f);
+ fclose(f);
+ text[len] = 0;
+ return text;
+}
+
+typedef struct
+{
+ int offset;
+ int end;
+ char *filename;
+ int next_line_after;
+} include_info;
+
+static include_info *stb_include_append_include(include_info *array, int len, int offset, int end, char *filename, int next_line)
+{
+ include_info *z = (include_info *) realloc(array, sizeof(*z) * (len+1));
+ z[len].offset = offset;
+ z[len].end = end;
+ z[len].filename = filename;
+ z[len].next_line_after = next_line;
+ return z;
+}
+
+static void stb_include_free_includes(include_info *array, int len)
+{
+ int i;
+ for (i=0; i < len; ++i)
+ free(array[i].filename);
+ free(array);
+}
+
+static int stb_include_isspace(int ch)
+{
+ return (ch == ' ' || ch == '\t' || ch == '\r' || ch == '\n');
+}
+
+// find location of all #include and #inject
+static int stb_include_find_includes(char *text, include_info **plist)
+{
+ int line_count = 1;
+ int inc_count = 0;
+ char *s = text, *start;
+ include_info *list = NULL;
+ while (*s) {
+ // parse is always at start of line when we reach here
+ start = s;
+ while (*s == ' ' || *s == '\t')
+ ++s;
+ if (*s == '#') {
+ ++s;
+ while (*s == ' ' || *s == '\t')
+ ++s;
+ if (0==strncmp(s, "include", 7) && stb_include_isspace(s[7])) {
+ s += 7;
+ while (*s == ' ' || *s == '\t')
+ ++s;
+ if (*s == '"') {
+ char *t = ++s;
+ while (*t != '"' && *t != '\n' && *t != '\r' && *t != 0)
+ ++t;
+ if (*t == '"') {
+ char *filename = (char *) malloc(t-s+1);
+ memcpy(filename, s, t-s);
+ filename[t-s] = 0;
+ s=t;
+ while (*s != '\r' && *s != '\n' && *s != 0)
+ ++s;
+ // s points to the newline, so s-start is everything except the newline
+ list = stb_include_append_include(list, inc_count++, start-text, s-text, filename, line_count+1);
+ }
+ }
+ } else if (0==strncmp(s, "inject", 6) && (stb_include_isspace(s[6]) || s[6]==0)) {
+ while (*s != '\r' && *s != '\n' && *s != 0)
+ ++s;
+ list = stb_include_append_include(list, inc_count++, start-text, s-text, NULL, line_count+1);
+ }
+ }
+ while (*s != '\r' && *s != '\n' && *s != 0)
+ ++s;
+ if (*s == '\r' || *s == '\n') {
+ s = s + (s[0] + s[1] == '\r' + '\n' ? 2 : 1);
+ }
+ ++line_count;
+ }
+ *plist = list;
+ return inc_count;
+}
+
+// avoid dependency on sprintf()
+static void stb_include_itoa(char str[9], int n)
+{
+ int i;
+ for (i=0; i < 8; ++i)
+ str[i] = ' ';
+ str[i] = 0;
+
+ for (i=1; i < 8; ++i) {
+ str[7-i] = '0' + (n % 10);
+ n /= 10;
+ if (n == 0)
+ break;
+ }
+}
+
+static char *stb_include_append(char *str, size_t *curlen, char *addstr, size_t addlen)
+{
+ str = (char *) realloc(str, *curlen + addlen);
+ memcpy(str + *curlen, addstr, addlen);
+ *curlen += addlen;
+ return str;
+}
+
+char *stb_include_string(char *str, char *inject, char *path_to_includes, char *filename, char error[256])
+{
+ char temp[4096];
+ include_info *inc_list;
+ int i, num = stb_include_find_includes(str, &inc_list);
+ size_t source_len = strlen(str);
+ char *text=0;
+ size_t textlen=0, last=0;
+ for (i=0; i < num; ++i) {
+ text = stb_include_append(text, &textlen, str+last, inc_list[i].offset - last);
+ // write out line directive for the include
+ #ifndef STB_INCLUDE_LINE_NONE
+ #ifdef STB_INCLUDE_LINE_GLSL
+ if (textlen != 0) // GLSL #version must appear first, so don't put a #line at the top
+ #endif
+ {
+ strcpy(temp, "#line ");
+ stb_include_itoa(temp+6, 1);
+ strcat(temp, " ");
+ #ifdef STB_INCLUDE_LINE_GLSL
+ stb_include_itoa(temp+15, i+1);
+ #else
+ strcat(temp, "\"");
+ if (inc_list[i].filename == 0)
+ strcmp(temp, "INJECT");
+ else
+ strcat(temp, inc_list[i].filename);
+ strcat(temp, "\"");
+ #endif
+ strcat(temp, "\n");
+ text = stb_include_append(text, &textlen, temp, strlen(temp));
+ }
+ #endif
+ if (inc_list[i].filename == 0) {
+ if (inject != 0)
+ text = stb_include_append(text, &textlen, inject, strlen(inject));
+ } else {
+ char *inc;
+ strcpy(temp, path_to_includes);
+ strcat(temp, "/");
+ strcat(temp, inc_list[i].filename);
+ inc = stb_include_file(temp, inject, path_to_includes, error);
+ if (inc == NULL) {
+ stb_include_free_includes(inc_list, num);
+ return NULL;
+ }
+ text = stb_include_append(text, &textlen, inc, strlen(inc));
+ free(inc);
+ }
+ // write out line directive
+ #ifndef STB_INCLUDE_LINE_NONE
+ strcpy(temp, "\n#line ");
+ stb_include_itoa(temp+6, inc_list[i].next_line_after);
+ strcat(temp, " ");
+ #ifdef STB_INCLUDE_LINE_GLSL
+ stb_include_itoa(temp+15, 0);
+ #else
+ strcat(temp, filename != 0 ? filename : "source-file");
+ #endif
+ text = stb_include_append(text, &textlen, temp, strlen(temp));
+ // no newlines, because we kept the #include newlines, which will get appended next
+ #endif
+ last = inc_list[i].end;
+ }
+ text = stb_include_append(text, &textlen, str+last, source_len - last + 1); // append '\0'
+ stb_include_free_includes(inc_list, num);
+ return text;
+}
+
+char *stb_include_strings(char **strs, int count, char *inject, char *path_to_includes, char *filename, char error[256])
+{
+ char *text;
+ char *result;
+ int i;
+ size_t length=0;
+ for (i=0; i < count; ++i)
+ length += strlen(strs[i]);
+ text = (char *) malloc(length+1);
+ length = 0;
+ for (i=0; i < count; ++i) {
+ strcpy(text + length, strs[i]);
+ length += strlen(strs[i]);
+ }
+ result = stb_include_string(text, inject, path_to_includes, filename, error);
+ free(text);
+ return result;
+}
+
+char *stb_include_file(char *filename, char *inject, char *path_to_includes, char error[256])
+{
+ size_t len;
+ char *result;
+ char *text = stb_include_load_file(filename, &len);
+ if (text == NULL) {
+ strcpy(error, "Error: couldn't load '");
+ strcat(error, filename);
+ strcat(error, "'");
+ return 0;
+ }
+ result = stb_include_string(text, inject, path_to_includes, filename, error);
+ free(text);
+ return result;
+}
+
+#if 0 // @TODO, GL_ARB_shader_language_include-style system that doesn't touch filesystem
+char *stb_include_preloaded(char *str, char *inject, char *includes[][2], char error[256])
+{
+
+}
+#endif
+
+#endif // STB_INCLUDE_IMPLEMENTATION
projects / vg.git / blobdiff