glsl/apps: Assert that ftell does not return an error.
[mesa.git] / src / glsl / apps / purify.c
1 /**************************************************************************
2 *
3 * Copyright 2009 VMware, Inc.
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27
28 #include <assert.h>
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include "../pp/sl_pp_public.h"
33
34
35 int
36 main(int argc,
37 char *argv[])
38 {
39 FILE *in;
40 long size;
41 char *inbuf;
42 struct sl_pp_purify_options options;
43 char *outbuf;
44 char errmsg[100] = "";
45 unsigned int errline = 0;
46 FILE *out;
47
48 if (argc != 3) {
49 printf("Usage: purify infile outfile\n");
50 return 1;
51 }
52
53 in = fopen(argv[1], "rb");
54 if (!in) {
55 return 1;
56 }
57
58 fseek(in, 0, SEEK_END);
59 size = ftell(in);
60 assert(size != -1);
61 fseek(in, 0, SEEK_SET);
62
63 out = fopen(argv[2], "wb");
64 if (!out) {
65 fclose(in);
66 return 1;
67 }
68
69 inbuf = malloc(size + 1);
70 if (!inbuf) {
71 fprintf(out, "$OOMERROR\n");
72
73 fclose(out);
74 fclose(in);
75 return 1;
76 }
77
78 if (fread(inbuf, 1, size, in) != size) {
79 fprintf(out, "$READERROR\n");
80
81 free(inbuf);
82 fclose(out);
83 fclose(in);
84 return 1;
85 }
86 inbuf[size] = '\0';
87
88 fclose(in);
89
90 memset(&options, 0, sizeof(options));
91
92 if (sl_pp_purify(inbuf, &options, &outbuf, errmsg, sizeof(errmsg), &errline)) {
93 fprintf(out, "$PURIFYERROR %u: %s\n", errline, errmsg);
94
95 free(inbuf);
96 fclose(out);
97 return 1;
98 }
99
100 free(inbuf);
101
102 fwrite(outbuf, 1, strlen(outbuf), out);
103
104 free(outbuf);
105 fclose(out);
106
107 return 0;
108 }