1 files changed, 138 insertions, 0 deletions
diff --git a/build/read.c b/build/read.c
new file mode 100644
index 000000000..b5790fe3a
--- /dev/null
+++ b/build/read.c
@@ -0,0 +1,138 @@
+#include <stdlib.h>
+#include <ctype.h>
+#include <string.h>
+
+#include "spec.h"
+#include "rpmlib.h"
+#include "messages.h"
+#include "macro.h"
+#include "misc.h"
+
+static int matchTok(char *token, char *line);
+
+/* returns 0 - success */
+/*         1 - EOF     */
+/*        <0 - error   */
+
+int readLine(Spec spec, int strip)
+{
+    char *from, *to, *last, *s, *arch, *os;
+    int match;
+    char ch;
+    struct ReadLevelEntry *rl;
+
+    /* Make sure the spec file is open */
+    if (!spec->file) {
+	if (!(spec->file = fopen(spec->specFile, "r"))) {
+	    rpmError(RPMERR_BADSPEC, "Unable to open: %s\n", spec->specFile);
+	    return RPMERR_BADSPEC;
+	}
+	spec->lineNum = 0;
+    }
+
+    /* Make sure we have something in the read buffer */
+    if (!spec->readPtr || ! *(spec->readPtr)) {
+	if (!fgets(spec->readBuf, BUFSIZ, spec->file)) {
+	    /* EOF */
+	    if (spec->readStack->next) {
+		rpmError(RPMERR_UNMATCHEDIF, "Unclosed %%if");
+	        return RPMERR_UNMATCHEDIF;
+	    }
+	    return 1;
+	}
+	spec->readPtr = spec->readBuf;
+	spec->lineNum++;
+	/*rpmMessage(RPMMESS_DEBUG, "LINE: %s", spec->readBuf);*/
+    }
+    
+    /* Copy a single line to the line buffer */
+    from = spec->readPtr;
+    to = last = spec->line;
+    ch = ' ';
+    while (*from && ch != '\n') {
+	ch = *to++ = *from++;
+	if (!isspace(ch)) {
+	    last = to;
+	}
+    }
+    *to = '\0';
+    spec->readPtr = from;
+    
+    if (strip) {
+	*last = '\0';
+    }
+
+    rpmGetArchInfo(&arch, NULL);
+    rpmGetOsInfo(&os, NULL);
+    s = spec->line;
+    SKIPSPACE(s);
+    match = -1;
+    if (! strncmp("%ifarch", s, 7)) {
+	match = matchTok(arch, s);
+    } else if (! strncmp("%ifnarch", s, 8)) {
+	match = !matchTok(arch, s);
+    } else if (! strncmp("%ifos", s, 5)) {
+	match = matchTok(os, s);
+    } else if (! strncmp("%ifnos", s, 6)) {
+	match = !matchTok(os, s);
+    } else if (! strncmp("%else", s, 5)) {
+	if (! spec->readStack->next) {
+	    /* Got an else with no %if ! */
+	    rpmError(RPMERR_UNMATCHEDIF, "line %d: Got a %%else with no if",
+		     spec->lineNum);
+	    return RPMERR_UNMATCHEDIF;
+	}
+	spec->readStack->reading =
+	    spec->readStack->next->reading && ! spec->readStack->reading;
+	spec->line[0] = '\0';
+    } else if (! strncmp("%endif", s, 6)) {
+	if (! spec->readStack->next) {
+	    /* Got an end with no %if ! */
+	    rpmError(RPMERR_UNMATCHEDIF, "line %d: Got a %%endif with no if",
+		     spec->lineNum);
+	    return RPMERR_UNMATCHEDIF;
+	}
+	rl = spec->readStack;
+	spec->readStack = spec->readStack->next;
+	free(rl);
+	spec->line[0] = '\0';
+    }
+    if (match != -1) {
+	rl = malloc(sizeof(struct ReadLevelEntry));
+	rl->reading = spec->readStack->reading && match;
+	rl->next = spec->readStack;
+	spec->readStack = rl;
+	spec->line[0] = '\0';
+    }
+    
+    if (spec->readStack->reading) {
+	expandMacros(&spec->macros, spec->line);
+    } else {
+	spec->line[0] = '\0';
+    }
+
+    return 0;
+}
+
+static int matchTok(char *token, char *line)
+{
+    char buf[BUFSIZ], *tok;
+
+    strcpy(buf, line);
+    strtok(buf, " \n\t");
+    while ((tok = strtok(NULL, " \n\t"))) {
+	if (! strcmp(tok, token)) {
+	    return 1;
+	}
+    }
+
+    return 0;
+}
+
+void closeSpec(Spec spec)
+{
+    if (spec->file) {
+	fclose(spec->file);
+    }
+    spec->file = NULL;
+}