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Sean Barrett
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| Original file line number | Original file line | Diff line number | Diff line change |
|---|---|---|---|
| @@ -0,0 +1,288 @@ | |||
| // stb_include.h - v0.01 - 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 | |||
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| #ifndef STB_INCLUDE_STB_INCLUDE_H | |||
| #define STB_INCLUDE_STB_INCLUDE_H | |||
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| // 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]); | |||
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| // 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]); | |||
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| // 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]); | |||
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| #endif | |||
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| #ifdef STB_INCLUDE_IMPLEMENTATION | |||
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| #include <stdio.h> | |||
| #include <stdlib.h> | |||
| #include <string.h> | |||
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| 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; | |||
| } | |||
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| typedef struct | |||
| { | |||
| int offset; | |||
| int end; | |||
| char *filename; | |||
| int next_line_after; | |||
| } include_info; | |||
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| 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; | |||
| } | |||
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| 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); | |||
| } | |||
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| static int stb_include_isspace(int ch) | |||
| { | |||
| return (ch == ' ' || ch == '\t' || ch == '\r' || ch == 'n'); | |||
| } | |||
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| // 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; | |||
| } | |||
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| // 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; | |||
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| for (i=1; i < 8; ++i) { | |||
| str[7-i] = '0' + (n % 10); | |||
| n /= 10; | |||
| if (n == 0) | |||
| break; | |||
| } | |||
| } | |||
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| 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; | |||
| } | |||
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| 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; | |||
| } | |||
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| 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; ++count) | |||
| length += strlen(strs[i]); | |||
| text = (char *) malloc(length+1); | |||
| length = 0; | |||
| for (i=0; i < count; ++count) { | |||
| strcpy(text + length, strs[i]); | |||
| length += strlen(strs[i]); | |||
| } | |||
| result = stb_include_string(text, inject, path_to_includes, filename, error); | |||
| free(text); | |||
| return result; | |||
| } | |||
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| 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; | |||
| } | |||
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| #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]) | |||
| { | |||
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| } | |||
| #endif | |||
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| #endif // STB_INCLUDE_IMPLEMENTATION | |||